A Comprehensive Overview of Capacitor-Grade Tantalum Powder


Capacitor-grade tantalum powder stands as a crucial material in the realm of electronics. That’s particularly true in the production of tantalum capacitors. Its specialized properties and stringent manufacturing processes render it indispensable in creating high-performance capacitors vital to various electronic devices.

This comprehensive overview underscores the critical role of capacitor-grade tantalum powder in electronics. It also emphasizes its properties, manufacturing processes, applications, and contributions to the evolution of electronic devices.

Capacitor-Grade Tantalum Powder

Understanding the Main Benefits: Purity and Characteristics

The significant advantages offered by capacitor-grade tantalum powder involve delving into its purity and distinctive characteristics. These properties play a pivotal role in ensuring the reliability and performance of tantalum capacitors in electronic applications.

–High Purity Standards:

Capacitor-grade tantalum powder is subjected to rigorous purification techniques. These techniques ensure purity levels that often exceed 99.9%. This high purity is instrumental in guaranteeing the reliability and stability of tantalum capacitors in electronic applications.

–Uniform Particle Size Distribution:

The powder boasts uniform particle size distribution. This is a critical characteristic ensuring consistent performance in capacitor manufacturing processes. This uniformity is essential in maintaining the capacitor’s reliability and functionality across batches.

–Specific Surface Area:

Its high specific surface area facilitates optimal adhesion to the capacitor’s substrate. This property aids in the formation of a stable and uniform dielectric layer, and it is crucial for the capacitor’s performance and longevity.

Role in Capacitor Manufacturing: Anodization and Dielectric Formation

In the intricate process of capacitor manufacturing, capacitor-grade tantalum powder assumes a pivotal role in shaping the functionality and reliability of tantalum capacitors. Through a meticulous anodization process, this powder becomes the cornerstone for the formation of the crucial dielectric layer within tantalum capacitors.

Anodization Process:

Capacitor-grade tantalum powder serves as the primary material for the formation of the dielectric layer within tantalum capacitors. Through an anodization process, a tantalum oxide layer is meticulously created on the surface of the powder particles. This layer is a vital insulating layer necessary for the capacitor’s operation.

–Compactness and Stability:

The unique characteristics of capacitor-grade tantalum powder contribute significantly to the creation of highly compact and stable capacitors. These capacitors offer high capacitance per volume, low leakage currents, and exceptional reliability in electronic circuits.

Applications and Contributions to Electronics Industry

–Electronic Devices:

Capacitor-grade tantalum powder plays a pivotal role in the production of tantalum capacitors used in various electronic devices. These capacitors are integral components found in smartphones, computers, automotive electronics, medical equipment, and numerous other electronic applications.

Related reading: Tantalum Powder Types & Properties

–Miniaturization and Performance:

The properties of tantalum powder enable the manufacture of miniature capacitors with high capacitance values. This capability facilitates the miniaturization of electronic devices without compromising performance, contributing to the evolution of smaller, more efficient electronics.

Quality Standards and Specialized Suppliers

–Stringent Quality Control:

Manufacturers adhere to stringent quality control measures to ensure the consistent quality and reliability of capacitor-grade tantalum powder. These measures are crucial in meeting the strict requirements of the electronics industry.

–Specialized Suppliers:

SAM and other dedicated suppliers focus on providing capacitor-grade tantalum powder, catering specifically to the stringent demands of electronics manufacturers. These suppliers play a vital role in ensuring a consistent supply of high-quality tantalum powder for capacitor production.

Conclusion: Enabling Electronic Advancements

In summary, capacitor-grade tantalum powder stands as a linchpin in the electronics industry. It contributes significantly to the advancement and miniaturization of electronic devices. Its specialized properties, stringent manufacturing processes, and essential role in tantalum capacitor production underscore its critical importance in powering modern electronic technologies.

Advanced Refractory Metals (ARM) stands at the forefront as a premier supplier and manufacturer of top-tier Capacitor Grade Tantalum Powder crafted through sodium reduction processes. Our offerings encompass three distinct types of this high-quality powder, tailored to meet diverse requirements. All of them are available at competitive pricing to suit your specific needs. Send us an inquiry if you are interested.

Tantalum: Pioneering Electric Vehicle Innovation


As the automotive industry undergoes a seismic shift toward sustainable mobility, the role of tantalum, a rare and versatile metal, emerges as a crucial linchpin in the realm of electric vehicle (EV) innovation. This unassuming element, with its remarkable properties, plays a pivotal role in reshaping the landscape of modern transportation.

Electric Vehicles

Tantalum’s Remarkable Properties:

Tantalum, known for its exceptional resistance to corrosion and its ability to store and release electrical energy efficiently, stands out as a vital component in the drive for cleaner, more efficient transport solutions. Its high melting point, robustness in harsh conditions, and compatibility with other materials make it an ideal candidate for critical applications within electric vehicles.

Tantalum Used in Electric Vehicles

Tantalum, a rare and highly valuable transition metal, plays a pivotal role in various industries, including the automotive sector, particularly in the realm of electric cars. Here’s a closer look at how tantalum intersects with the electric vehicle (EV) industry:

1. Capacitors and Electronics:

Tantalum capacitors, known for their high capacitance and stability, are integral components in EVs. These capacitors are vital for managing electrical systems, controlling battery power, and ensuring stable voltage levels. They contribute to the efficiency and reliability of electric vehicle electronics.

2. Battery Technology:

Although tantalum is not a primary component in electric vehicle batteries, it indirectly influences battery performance. Tantalum powders are utilized in the production of tantalum-based capacitors, which aid in regulating power delivery and ensuring the safety and longevity of lithium-ion batteries used in EVs.

3. Heat-Resistant Components:

Tantalum possesses exceptional heat resistance, making it suitable for components in electric vehicles exposed to high temperatures. It finds applications in thermal management systems, such as heat shields and elements within electric propulsion systems, ensuring durability in demanding operating conditions.

4. Sustainability and Recycling:

Tantalum’s recyclability aligns with the sustainability goals of the EV industry. Efforts to recycle and reclaim tantalum from end-of-life electronic components contribute to reducing the environmental impact of EV production and align with eco-friendly manufacturing practices.

Tantalum’s Benefits for Electric Vehicle Applications

–Tantalum in Energy Storage:

Within the heart of electric cars lie tantalum-based capacitors. These capacitors, leveraging tantalum’s high capacitance and stability, serve as reliable energy storage devices in EVs. Tantalum capacitors offer exceptional performance, delivering instantaneous power for rapid acceleration and regenerative braking, effectively capturing and redistributing energy during braking cycles, thus maximizing the vehicle’s energy efficiency.

–Enhancing Efficiency and Range:

Tantalum’s role extends beyond capacitors. It also contributes significantly to the development of lithium-based batteries. Tantalum-based additives enhance the performance and lifespan of lithium-ion batteries, addressing issues of overheating and improving their charging efficiency. These advancements increase the overall energy density and extend the driving range of electric vehicles, a critical factor in mainstream adoption.

–Enabling Sustainable Mobility:

In the pursuit of sustainable mobility, tantalum plays a key role in reducing the carbon footprint of electric vehicles. Its presence in energy storage solutions promotes cleaner energy utilization, mitigating reliance on fossil fuels and contributing to the reduction of greenhouse gas emissions, thus aligning with global sustainability goals.

Challenges and Future Prospects

Despite its invaluable contributions, the availability and ethical sourcing of tantalum pose challenges. Being a conflict-sensitive material, responsible sourcing practices and efforts to prevent the trade of “conflict minerals” remain critical. The industry’s focus on ethical mining and sourcing practices aims to ensure a responsible supply chain for tantalum, securing its place in the clean energy revolution.

Collaborative Innovations for Tomorrow’s EVs

Tantalum’s integration into the EV ecosystem is not a solitary endeavor. Collaborative efforts between tantalum producers, battery manufacturers, and automotive companies drive continuous innovations. Research and development initiatives centered on improving tantalum-based technologies focus on maximizing energy storage, minimizing weight, and enhancing the overall performance of electric vehicles.


As electric vehicles continue to gain prominence as a sustainable mobility solution, tantalum emerges as a silent but formidable force propelling this revolution forward. Its contributions to energy storage, efficiency optimization, and sustainability align with the aspirations of a cleaner, greener automotive future. With ongoing advancements and responsible utilization, tantalum remains an indispensable element in the electrification of transportation, paving the way for a more sustainable and efficient automotive industry. For more information, please check our homepage at https://samaterials.com/.

Aluminum vs. Tantalum Capacitors: Understanding the Key Differences


Capacitors are essential components in electronic circuits. They store and release electrical energy as needed. Two commonly used types of capacitors are aluminum electrolytic capacitors and tantalum capacitors. While they share the same fundamental function, they exhibit significant differences. This article will explore the distinctions between aluminum and tantalum capacitors. Hope that you can find the best suited for your specific application.

Different Tantalum Capacitors [1]

1. Dielectric Material:

  • Aluminum Electrolytic Capacitors: These capacitors use an electrolyte (usually a liquid or gel) as the dielectric. The electrolyte is typically a conductive solution that allows for a high capacitance value.
  • Tantalum Capacitors: Tantalum capacitors use tantalum metal as the dielectric. These capacitors have a solid electrolyte made of manganese dioxide.

2. Polarity:

  • Aluminum Electrolytic Capacitors: These capacitors are polarized. That is to say, they have a positive and a negative terminal, and they must be connected with the correct polarity to function properly.
  • Tantalum Capacitors: Tantalum capacitors are also polarized, with a marked positive terminal. Connecting them with the wrong polarity can result in catastrophic failure and potentially even safety hazards.

3. Capacitance and Size:

  • Aluminum Electrolytic Capacitors: They typically offer higher capacitance values compared to tantalum capacitors for a given physical size.
  • Tantalum Capacitors: Tantalum capacitors have a lower capacitance compared to aluminum electrolytic capacitors of similar physical dimensions. They are often smaller in size for the same capacitance value.

4. Voltage Rating:

  • Aluminum Electrolytic Capacitors: They are available in a wide range of voltage ratings, making them suitable for various voltage requirements.
  • Tantalum Capacitors: Tantalum capacitors usually have lower voltage ratings compared to aluminum electrolytic capacitors.

5. ESR (Equivalent Series Resistance):

  • Aluminum Electrolytic Capacitors: They typically have higher ESR, so they have more internal resistance. This can affect their performance, particularly in high-frequency applications.
  • Tantalum Capacitors: Tantalum capacitors have lower ESR, so they are more suitable for power supply filtering and other low ESR applications.

6. Reliability:

  • Aluminum Electrolytic Capacitors: They are generally less reliable and have a shorter lifespan compared to tantalum capacitors. They can dry out or degrade over time.
  • Tantalum Capacitors: Tantalum capacitors are known for their long-term reliability and stable performance.

7. Cost:

  • Aluminum Electrolytic Capacitors: They are typically more cost-effective compared to tantalum capacitors.
  • Tantalum Capacitors: Tantalum capacitors are more expensive due to the cost of tantalum materials and their manufacturing processes.


In summary, the choice between aluminum electrolytic capacitors and tantalum capacitors depends on the specific requirements of your application. You should consider capacitance value, size constraints, voltage rating, ESR, and budget. Each type has its own advantages and limitations, so it’s important to select the one that best suits your needs. For more information, please check our homepage.




[1] Tantalum capacitor. (2023, October 6). In Wikipedia. https://en.wikipedia.org/wiki/Tantalum_capacitor


Harnessing the Power: Tantalum Oxide Powder’s Contribution to Advanced Electronics


In the ever-evolving landscape of electronics, the quest for smaller, faster, and more efficient components is unending. Tantalum oxide powder, a material often hidden behind the scenes, is emerging as a key player in this pursuit. In this article, we delve into the world of tantalum oxide powder, exploring its remarkable characteristics and the pivotal role it plays in shaping the future of electronic technology.

Tantalum Oxide Powder

Understanding Tantalum Oxide Powder

Tantalum oxide often denoted as Ta₂O₅ is a compound composed of tantalum and oxygen atoms. It presents itself as a fine white powder with a range of unique characteristics:

  • High Dielectric Constant: Ta₂O₅ boasts a high dielectric constant, making it an excellent material for capacitors. Capacitors built with such powder can store more charge in a smaller space, enabling the miniaturization of electronic devices.
  • Stability: Ta₂O₅ exhibits exceptional stability, both chemically and thermally. This stability ensures the reliability of electronic components even under harsh conditions.
  • Low Leakage Current: Ta₂O₅ capacitors have low leakage currents, which means they retain stored charge efficiently, reducing energy loss and improving the efficiency of electronic devices.
  • Miniaturization: Its properties allow for the creation of smaller and more efficient electronic components, a crucial factor in the development of compact and high-performance devices.

Applications in Advanced Electronics

Tantalum oxide powder’s impact on advanced electronics is substantial:

  • Capacitors: Ta₂O₅ capacitors are fundamental components in electronics, used in devices such as smartphones, laptops, and medical equipment. They provide high capacitance in a small footprint, a critical factor in modern miniaturized electronics.
  • Semiconductors: Ta₂O₅ plays a role in semiconductor manufacturing, where it acts as an insulating layer and gate dielectric material in advanced transistors.
  • Memory Devices: In non-volatile memory devices, tantalum oxide is employed to create high-performance, low-power storage solutions.

Related reading: Is Tantalum Oxide A Semiconductor?

Challenges and Future

While tantalum oxide powder holds immense promise, challenges include the sourcing of tantalum, which is a relatively rare element. However, research continues into sustainable and efficient production methods to ensure a stable supply.


In a word, tantalum oxide powder is an unsung hero in the world of advanced electronics. Its unique characteristics drive innovation, enabling the development of smaller, more efficient, and more powerful electronic devices. As the electronics industry continues to evolve, tantalum oxide powder will remain a pivotal ingredient in the recipe for progress, shaping the future of electronic technology.

Tantalum oxide powder is on sale at Stanford Advanced Materials (SAM). A variety of tantalum compounds including Tantalum Carbide PowderTantalum Silicide PowderCapacitor Grade Tantalum Powder, and Metallurgical Grade Tantalum Powder are also available. Send us an inquiry if you are interested.

Tantalum Powder: A Sustainable Solution for a Greener Future


In a world increasingly focused on sustainability and environmental responsibility, Tantalum Powder stands out as a remarkable and eco-friendly material. This article explores how it is contributing to sustainability efforts across diverse industries and paving the way for a more environmentally conscious world. Hope that you can have a better understanding.

Tantalum Powder

1. Renewable Energy: Efficient Energy Storage

Tantalum Capacitors are vital components in energy-efficient technologies, including renewable energy systems. They enable efficient energy storage and distribution in solar panels, wind turbines, and electric vehicles, helping reduce our dependence on fossil fuels and lower greenhouse gas emissions.

2. Electronics: Longevity and Efficiency

Tantalum Capacitors’ durability and reliability extend the lifespan of electronic devices, reducing electronic waste. Their small size and high performance also contribute to energy-efficient electronics, aligning with sustainability goals.

3. Aerospace and Transportation: Fuel Efficiency

Tantalum’s lightweight and high-temperature resistance properties contribute to fuel-efficient aerospace components and transportation systems, reducing energy consumption and emissions during travel.

4. Medical Advancements: Biocompatible Implants

Tantalum’s biocompatibility and corrosion resistance make it a sustainable choice for medical implants. Longer-lasting implants mean fewer replacements and less medical waste.

5. Recycling and Circular Economy: Resource Conservation

Tantalum is highly recyclable. Promoting recycling efforts in the tantalum industry contributes to a circular economy, reducing the need for new tantalum mining and minimizing its environmental footprint.

6. Conflict-Free Sourcing: Ethical Mining

The tantalum industry has made strides in avoiding the use of conflict minerals. Ethical mining practices ensure that tantalum is sourced responsibly and without contributing to conflicts in resource-rich regions.


Tantalum Powder represents a sustainable solution for a greener future, aligning with global efforts to reduce environmental impact and combat climate change. Its applications in renewable energy, electronics, aerospace, and healthcare, coupled with its recyclability and ethical sourcing practices, make tantalum an essential element in the transition toward a more sustainable and eco-conscious world. As we continue to advance technologically and environmentally, tantalum’s role in shaping a greener future cannot be overstated.

Advanced Refractory Metal (ARM) provides a variety of Tantalum Powders. Send us an inquiry if you are interested.

How Tantalum Powder Is Revolutionizing the Electronics Industry


Tantalum Powder is making waves as a revolutionary force in the electronics industry, redefining how devices are designed, manufactured, and operated. Its unique properties are transforming various aspects of electronics, from miniaturization to energy storage and beyond. This article is going to discuss how it is used in the electronics industry. Hope it could give you a better comprehension of its features and applications.

Tantalum Powder

Miniaturization and Efficiency

One of the most impactful ways Tantalum Powder is revolutionizing electronics is by enabling the miniaturization of components. Its high melting point and excellent thermal conductivity make it suitable for crafting intricate and compact designs. As electronic devices become smaller and more powerful, this powder facilitates the creation of efficient and densely packed circuits that deliver optimal performance in limited space.

Capacitor Advancements

Tantalum Capacitors, vital components in electronic devices, have witnessed a significant leap in performance due to Tantalum Powder. These capacitors boast high capacitance-to-volume ratios, allowing them to store more energy in a smaller footprint. This efficiency translates to longer battery life, faster charging, and improved overall device performance. Tantalum capacitors also exhibit low equivalent series resistance (ESR), reducing energy losses and heat generation.

Tantalum Capacitors

Energy Storage Breakthroughs

The electronics industry is increasingly focused on energy storage solutions, and Tantalum Powder is at the forefront of these advancements. It’s a key material in the development of supercapacitors, offering high energy density, rapid charge and discharge rates, and exceptional cycle life. This opens up new avenues for energy-efficient electronics, renewable energy integration, and electric vehicle technologies.

Reliability and Longevity

Tantalum Powder’s remarkable resistance to corrosion ensures the longevity and reliability of electronic components, especially in harsh environments. This is crucial for aerospace, automotive, and industrial applications where electronic systems must operate flawlessly under extreme conditions.

Sustainability and Ethical Sourcing

Sustainability lies at the heart of Tantalum Powder’s role in the electronics industry. As a conflict-free and responsibly sourced material, it aligns with the industry’s growing emphasis on ethical supply chains.


In essence, Tantalum Powder is spearheading a transformation in the electronics industry. By enabling miniaturization, enhancing capacitor performance, facilitating energy storage breakthroughs, ensuring reliability, and promoting sustainability, it’s shaping a future where electronics are more efficient, powerful, and environmentally conscious than ever before.

Advanced Refractory Metal (ARM) provides capacitor tantalum, metallurgical tantalum, voltage tantalum powder, and spherical tantalum powder. Send us an inquiry if you are interested.

What is Tantalum Sulfate Used For?

Tantalum is a rare metal with a wide range of applications in various industries. It is known for its excellent corrosion resistance, high melting point, and unique capacitance properties. Tantalum sulfate is a compound derived from tantalum that finds its use in a diverse range of applications.

tantalum sulfate

Tantalum sulfate is primarily used as a precursor to produce tantalum capacitors. Tantalum capacitors are small and efficient electronic components that store and regulate electrical energy in electronic circuits. They are widely used in consumer electronics such as smartphones, laptops, and televisions. Tantalum capacitors have a high capacitance-to-volume ratio and can withstand high temperatures, making them ideal for use in compact and high-performance electronic devices.

In the chemical industry, tantalum sulfate is used as a catalyst for various chemical reactions. It is also used in the production of other tantalum compounds, such as tantalum oxide and tantalum chloride.


Tantalum sulfate is also used in the production of superalloys, which are high-strength and high-temperature-resistant alloys used in aerospace and defense industries. These alloys contain a combination of metals, including tantalum, to provide the necessary strength and corrosion resistance needed for critical applications.

In the medical industry, tantalum is used to produce implants that can be used for reconstructive surgery. Tantalum sulfate is used as a precursor to produce tantalum powder, which is then used to make the implants. Tantalum implants are biocompatible and have excellent mechanical properties, making them ideal for use in bone replacement and other medical applications.

In the nuclear industry, tantalum sulfate is used as a component in nuclear fuel rods. Tantalum’s high melting point and excellent corrosion resistance make it an ideal material for use in nuclear applications.

In conclusion, tantalum sulfate has a wide range of applications in various industries. Its use as a precursor in the production of tantalum capacitors and implants, as well as in the chemical, aerospace, and nuclear industries, highlights the importance of this compound in modern technology and manufacturing.

Does Tantalum Have a High Resistance to Corrosion?

Corrosion Resistance of Tantalum

Tantalum has very good corrosion resistance in most inorganic acids, is very similar to glass, and has important uses in the chemical industry. It is resistant to almost all chemical media (including hydrochloric acid at boiling point, nitric acid, and sulfuric acid below 175°C) except hydrofluoric acid, fluorine, fuming sulfuric acid, and alkalis.

tantalum corrosion resistance

Tantalum has excellent corrosion resistance to dilute sulfuric acid below 75% and can be used at any temperature; it can be used at 160~170℃ for concentrated sulfuric acid without inflating; it can be used at 250~260℃ for concentrated sulfuric acid with inflating, and the corrosion increases beyond this temperature. Generally in more than 170 ℃ high-temperature use before the first test research. Tantalum also has good corrosion resistance to phosphoric acid, but if the acid contains a trace of fluorine (>4ppm), the corrosion rate increases.

Tantalum is usually not resistant to corrosion in alkali, it becomes brittle and corrodes more quickly at high temperatures and concentrations.

Tantalum can react with high-temperature gas, O2, N2, H2, etc. can penetrate into the internal to make it brittle, such as contact with the initial ecological H, which will also absorb hydrogen and become brittle. Therefore, tantalum equipment should not be in contact with more reactive metals (such as Fe, Al, Zn), because it is easy to constitute a tantalum-iron (Al, Zn) primary battery, and the hydrogen generated by the primary battery reaction will destroy the tantalum cathode and make the equipment fail.

If a small piece of platinum is connected to tantalum with a very small over-voltage of hydrogen, then all the hydrogen will be released on the platinum and the destruction of tantalum by hydrogen can be avoided.

Tantalum has excellent corrosion resistance but is expensive, so its applications are mainly in the form of composite plates and linings, and in order to reduce costs, the thickness of the tantalum layer wants to be as thin as possible, so composite plates or lining welding is very difficult, because the melting point of tantalum and steel is very different, (the melting point of tantalum is 2996 ℃, the melting point of steel is 1400 ℃) and Fe and Ta at high temperatures will form Fe2Ta brittle Intermetallic compounds if the measures are not appropriate, it is easy to lead to cracking of the weld.

The performance of tantalum capacitors

Tantalum electrolytic capacitors have excellent performance and are small in size among all capacitors but can achieve large electric capacity, so they are easy to be made into small chip components suitable for surface mounting.

The tantalum capacitors currently produced are sintered solid, foil-wound solid, and sintered liquid, of which sintered solid accounts for more than 95% of the total production at present, and the non-metal sealed resin package is the main body.

Tantalum electrolytic produces the working environment medium for capacitors is an extremely thin layer of tantalum pentoxide film that is generated on the surface of tantalum metal material. This layer of the oxide film medium is combined with one of the terminals that make up the capacitor as a whole and cannot exist alone, so the electric capacity per unit volume is particularly large, i.e., the specific capacity is very high, so it is particularly suitable for miniaturization.

During the operation of the tantalum electrolytic capacitor, it has the performance of automatic repair or isolation of oxide film defects, so that the oxide film dielectric is strengthened at any time and its proper insulation capacity is restored without continuous accumulation of damage. This performance with unique self-healing technology ensures the advantage of long life and reliability.

What are the Main Uses of Tantalum?

What are the basic uses of tantalum?

1 Tantalum is used to make tantalum capacitors: tantalum carbide powder and tantalum wire are the key materials for making tantalum capacitors, and they are excellent capacitors. Niobium can also be used to make capacitors.

ta powder

2 Tantalum is used to make high-temperature resistant tantalum products: tantalum can withstand high temperatures, has good strength, and rigidity, and is a high-quality material for making heating parts, heat insulation parts, and charging vessels for vacuum high-temperature furnaces.

3 Tantalum niobium is used to make corrosion-resistant tantalum niobium products: Tantalum niobium is a high-quality material resistant to acid and alkali and liquid metal corrosion and can be used in the chemical industry to make boilers, heaters, coolers, various vessel devices, etc.

4 tantalum niobium in the aerospace industry: used in the production of aerospace aircraft, rockets, submarines, and other engine components, such as combustion chambers, combustion ducts, turbine pumps, etc. Such as WC-103 Nb-Hf-Ti high-temperature niobium-based alloy is a high-quality material for astronautics, used as rocket gas pedal nozzle, spacecraft propulsion powering device and nozzle valve, etc.

5 Tantalum used to make the lining of armor-piercing ammunition: the application is currently mainly in the United States, is a missile, such as TOW2B missile.

6 Tantalum carbide as additives to cemented carbide: cemented carbide is mainly used as tools, tools, molds, and wear-resistant corrosion-resistant structural components, adding TaC can improve its hardness, strength, melting point, etc. NbC can also be used, the performance is second to TaC.

7 Niobium is the main additive for steel. The addition of niobium micro-alloyed steel, and steel grain refinement, can improve the strength and toughness of steel, about 75% of niobium applications in the field.

8 Niobium used as superconducting materials: Nb-Ti alloy is today’s widely used *, the amount of * large superconducting materials, such as Nb47Ti, there are important applications in high-energy physics, is the large hadron collider, heavy ion collider, and other high-energy particle gas pedal * selected practical superconducting materials; Nb3Sn is second only to Nb-Ti practical superconducting materials.

9 Tantalum oxide, and niobium oxide is the raw material for making tantalum-niobium artificial crystal: Ta2O5, Nb2O5 is the raw material for making LT, LN and other crystals, LT, LN is an important piezoelectric, thermoelectric and nonlinear optical materials, in the laser and micro-acoustic surface wave and other technical fields have important uses.

10 Niobium in the atomic energy industry: Nb has a small neutron capture cross-section, high thermal conductivity, and strength, and is used in atomic energy reactors as a nuclear fuel cladding material, nuclear fuel alloy additive, and heat exchanger structural material.

11 other applications: cathode sputtering tantalum coating, high vacuum suction pump tantalum active material, Nb2O5 and Ta2O5 for optical glass modifiers and chemical catalysts, Ta, Nb in medical devices and arts and crafts applications, etc.

Why is Tantalum So Valuable?

Properties of tantalum

Tantalum has a series of excellent characteristics such as a high melting point, low vapor pressure, good cold processing performance, high chemical stability, strong resistance to liquid metal and acid and alkali corrosion, and large dielectric constant of the surface oxide film, which makes it an important modern functional material.

tantalum wire

Tantalum rapidly generates a surface oxide film that closely covers its metallic substrate in almost any environment, which is extremely thin and dense, impervious to almost all media, and self-healing once damaged. Thanks to this excellent protective film, tantalum has extremely good corrosion resistance. Except for fluorine, hydrofluoric acid, acidic solutions containing fluorine ions, fuming nitric acid, and strong alkalis, tantalum is impervious to corrosion in most media.

The main uses of tantalum

In the electronics industry, tantalum is mainly used as tantalum capacitors, which are usually applied in the form of capacitor-grade tantalum powder, tantalum wire, and tantalum foil. Tantalum capacitors are indispensable electronic components for radar, spacecraft, and missiles, and are widely used in civil applications such as mobile communication, electronic equipment, and instruments.

Tantalum powder can be made into small and large capacity capacitors because of its large specific surface area and large dielectric constant of the dielectric film, and therefore large capacity.

Electrolytic capacitors made of tantalum have the advantages of small size, lightweight, good reliability, large operating temperature range, shock resistance, and long service life. Tantalum electrolytic capacitors can be divided into solid electrolyte capacitors and liquid electrolyte capacitors according to their electrolytic degree.

Tantalum electrolytic capacitor

Capacitors can be distinguished by the form of their anodes, there are mainly two kinds of tantalum foil anodes and tantalum powder sintered anodes. Tantalum wire is used as the anode lead for these two types of capacitors. The development of the electronics industry is demanding more and more miniaturization and high reliability of tantalum capacitors. In the miniaturization of tantalum capacitors and chip types, efforts are made to increase the specific capacity of tantalum powder.

Tantalum is also used as a material for electronic tubes. Due to its high melting point, low vapor pressure, good processing properties, low coefficient of thermal expansion, and excellent gas absorption, tantalum is a good material for emitter tubes and high-power electron tube parts. Due to its high chemical stability, tantalum target is an important material for the magneto-space sputtering coating of electronic chips.

Tantalum carbide is a refractory metal, which occupies an extremely important position in cemented carbide industrial applications. Like the ceramic carbides of WC, TiC, and metallic cobalt, TaC has excellent wear resistance, toughness, hardness, and stability.

There are two types of tantalum carbide use: one is to add tantalum carbide directly to WC-Co or WC-TiC-Co alloy in small amounts, which plays a role in controlling grain growth, etc.; the other is to form a solid solution with niobium carbide or other carbides, which can improve the high-temperature hardness, high-temperature strength and oxidation resistance of the alloy, greatly improving cutting speed and extending tool life.

Ceramic carbide has excellent cutting performance, generally composed of α, γ, β three phases. α phase is tungsten carbide; β phase is the metal phase binder, metal cobalt is the most commonly used binder for ceramic carbide; γ phase is the solid solution formed by TaC, NbC, and TiC, γ phase is dissolved in tungsten carbide, its role is as a crystal generation inhibitor.

The deep processing of tantalum and its application

Tantalum has very good plasticity and is extremely easy to be processed plastic. Various industrial profiles (tantalum tube, tantalum rod, tantalum wire, tantalum strip) can be produced by using conventional processing processes (extrusion, forging, rolling, and drawing). Tantalum and tantalum alloy molten ingots have a coarse grain organization and must first be extruded or hot-forged to open the billet and break the grains before they can be further processed into the material.

Pure tantalum can be forged at room temperature to open the billet, tantalum alloy open billet temperature is generally 1100- l200 ℃. During processing, the oxidation of the tantalum alloy surface generates loose oxides and can penetrate into the alloy matrix, forming a hard permeable layer that cracks during processing. Therefore, it is important to try to protect the metal surface from oxidation during the entire machining process.

Currently, tantalum blanks are protected by salt bath heating, coating, jacketing, inert gas protection, etc. The extrusion method can produce metal tubes, bars, and profiles of different sizes; tantalum ingots can be directly forged into rolled slabs. Glass coating can be used as a lubricant; rolling of tantalum alloy plates, usually using two-roll or four-roll mills, with deformation of 10% and 15%, and total deformation of 70% and 80% when rolling 2.5mm thin plates. When rolling a 2.5mm thin plate, kerosene or palm oil is used as a lubricant.