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.

What Products are Made of Tantalum?

Tantalum appears in many applications, including

– Sputtering barrels: Computer disk manufacturers and other industries that use sputtering processes are increasingly using tantalum to resist corrosion in sputtering barrels. The tantalum lining process is more environmentally friendly than chromium lining, helping the industry reduce its ecological impact.


– Machined fasteners: Machined fasteners made from tantalum offer excellent corrosion resistance. They replace fasteners made from alternative materials that are prone to failure or require expensive equipment downtime for maintenance. Tantalum fasteners are found in industries such as mining, energy, and pharmaceuticals, as well as in metal and chemical processing.

– X-ray/radiation shielding: Tantalum’s radiopaque properties make it ideal for X-ray and shielding applications that seek to prevent radiation leakage. Tantalum shielding can also protect sensitive electronic components in aerospace structures as well as components operating in corrosive environments.

– Vacuum furnace heating elements: Many vacuum furnace components contain tantalum rods due to tantalum’s oxidation resistance and high melting point. Tantalum’s temperature particle stability increases the life expectancy of the machine, as it can withstand high temperatures for extended periods of time.

– Machined parts for chemical processing equipment: Tantalum’s corrosion-resistant properties make it the material of choice for machined parts for chemical processing equipment. Tantalum machined parts replace inferior materials that perform poorly in harsh chemical environments and require extensive maintenance.


The uses of tantalum

– 1: Tantalum carbide, used for cutting tools

– 2: Tantalum lithium, for surface acoustic waves, cell phone filters, hi-fi, and TV

– 3: Tantalum oxide, used in telescopes, cameras, lenses for cell phones and X-ray films, inkjet printers

– 4: Tantalum powder, used for tantalum capacitors in electronic circuits

– 5: Tantalum plate, used in chemical reaction equipment such as coating, valves, etc.

– 6: Tantalum wire, tantalum rod, used for repairing skeleton plates, suture frames, etc.

– 7: Tantalum ingots: used for sputtering targets, high-temperature alloys, computer hardware drive discs, and TOW-2 bomb-forming projectiles


Together with tungsten carbide WC and titanium carbide TIC, tantalum carbide TAC is a cemented carbide component used in cutting and drilling tools.


Tantalum is particularly suitable for heat exchangers; it has high thermal conductivity and its surface properties prevent the formation of adhesive deposits.


Manufacture of furnace components such as screens, supports, and crucibles. The alloying elements in high-temperature alloys increase high-temperature strength. It is biologically inert and can be used for implants, needles, etc. Yttrium tantalate YTAO4 is used in medical diagnostics.


SAM offers our customers a wide selection of tantalum rods, tubes, sheets, and wires, all designed for a variety of applications. Our products are cold rolled and annealed in a proprietary process to create machined parts with metallurgical properties ideal for applications such as sputtering gun tubes, processing into fasteners, X-ray radiation shielding, development rings, vacuum furnace heating elements, chlorinator springs, assemblies, and more for light bulbs or chemical processing equipment.

Tantalum Capacitors in the Military Industry

Why is tantalum so popular?

The most important use of tantalum is the manufacture of electronic components, especially capacitors. 50%-70% of the world’s tantalum is used to manufacture tantalum capacitors, mainly in the form of capacitor-grade tantalum powder and tantalum wire.
Because tantalum forms a dense, stable, amorphous oxide film with high dielectric strength on its surface, it forms a stable anodic oxide film in acidic electrolytes and is easy to process.

tantalum capacitors

At the same time, tantalum powder sintered blocks can obtain a large surface area in a small volume, so tantalum capacitors have a series of excellent properties such as high capacitance, low leakage current, and low equivalent series resistance, good high and low-temperature characteristics, and long service life.

Tantalum Capacitors in the Military Industry

A tantalum capacitor is called a tantalum electrolytic capacitor, which is also a kind of electrolytic capacitor, using tantalum metal as the dielectric, hence the name.

The tantalum capacitor was firstly developed by Bell Labs in 1956, and it is a passive component with a small volume and large capacity capacitor.

Tantalum capacitors’ downstream applications can be divided into two categories: military and civilian. The military field includes aviation, spaceflight, ships, weapons, and electronic countermeasures, while the civil field includes consumer electronics, industrial control, electric power equipment, new energy, communication equipment, rail transportation, medical electronics, and automotive electronics. As an essential basic electronic component in electronic circuits, capacitor products are widely used in the military and civilian fields.

Military capacitors are mainly ceramic capacitors and tantalum capacitors. The development of the military electronics industry is especially important in the context of the information-based military. It is widely used in communications, computers, automobiles, electrical appliances, aerospace, national defense, and other industrial and scientific sectors.

Why Do Electrolytic Capacitors Explode?

If you want to know why the electrolytic capacitor explodes, first you have to know what the electrolytic capacitor is. An electrolytic capacitor is a kind of capacitance. The metal foil is the positive electrode (aluminum foil or tantalum foil), and the oxide film (aluminum oxide or tantalum oxide), which is closely attached to the metal, is the dielectric. The cathode consists of conductive material, electrolyte (which can be liquid or solid), and other materials. Because the electrolyte is the main part of the cathode, the electrolytic capacitor is hence named. At the same time, the capacitance of the electrolytic capacitor cannot be connected wrongly.

capacitors explode

Tantalum electrolytic capacitor mainly consists of sintering solid, foil winding solid, sintering liquid, and so on. The sintered solids account for more than 95% of the current production and are mainly composed of non-metallic sealed resin.

The aluminum electrolytic capacitor can be divided into four types: the lead type aluminum electrolytic capacitor; Horn type aluminum electrolytic capacitor; Bolted aluminum electrolytic capacitor; Solid aluminum electrolytic capacitor.

The possible reasons for the capacitor explosion are as follows:

  1. The breakdown of the internal components of the capacitor is mainly due to the poor manufacturing process.
  2. The capacitor is damaged by insulation to the shell. The high voltage side of the capacitor is made of a thin steel sheet. If the manufacturing process is poor, the edge is uneven with burr or serious bend. The tip is prone to corona, and the corona causes the breakdown of oil, the expansion of the case and the drop of oil. In addition, when the cover is closed, if the welding time is too long, the internal insulation burns and produces oil and gas, causing the voltage to drop greatly and damage.
  3. Poor sealing and oil leakage. The insulation resistance is reduced due to the poor sealing of the assembly casing. Or the oil spill caused the oil surface to drop, resulting in the extreme shell direction discharge or component breakdown.
  4. The belly and the inside dissociate. Due to the internal corona, breakdown discharge, and serious dissociation, under the action of overvoltage, the starting free voltage of the element is reduced to the working electric field intensity. This causes the physical, chemical and electrical effects to accelerate the aging and decomposition of the insulation, producing gas and forming a vicious circle, the pressure of the case is increased, causing the drum to explode
  5. A capacitor explodes with an electric charge. All capacitors with rated voltages are forbidden to be charged. Each time the capacitor bank recloses, the capacitor must be discharged for 3min after the switch is disconnected. Otherwise, the voltage polarity of the closing moment may be caused by the opposite polarity of the residual charge on the capacitor. For this purpose, a capacitor bank with a capacity of more than 160kvar is generally required, and automatic tripping device should be installed when there is no pressure. And the capacitor bank switches are not allowed to install automatic reclosing.

In addition, it may be caused by high temperature, poor ventilation, high operating voltage, excessive voltage harmonic component or operating overvoltage, etc.

Stanford Advanced Materials (SAM) is a leading supplier and manufacturer of high-quality capacitor grade tantalum powder and tantalum wire with competitive price and great delivery time. Please visit http://www.samaterials.com for more information.