Baoji Fairy Titanium Industry Co., Ltd. is one of the leading manufacturers and suppliers of r05200 99.95% high purity tantalum foil in China. Welcome to wholesale bulk high quality customized products made in China here from our factory. Good service and low price are available.
1. Tantalum foil is a thin metal coil formed of extremely hard metal tantalum, whose hardness can reach 6-6.5. Its melting point is as high as 2996 ℃, second only to tungsten and rhenium.
2. Size and standards
Grade: R05200, R05400, R05252(Ta-2.5W), R05255(Ta-10W)
Min thickness: 0.025mm
Purity: 99.95%,99.98%
Density: 16.6 g/cm3
Width: 10 ~ 300mm, length: ≥ 500mm
Standards: ASTM B708
3. Feature of Tantalum
Tantalum is malleable and can be pulled into thin wire foil. Its coefficient of thermal expansion is very small, and it expands by only 6.6% for every rise of one degree Celsius. In addition, it has strong toughness, which is even better than copper.
Tantalum also has outstanding chemical properties and great corrosion resistance. Under hot or cold temperatures, it doesn't react with concentrated nitric acid, hydrochloric acid, or "aqua regia." Tantalum can, however, corrode when exposed to hot, concentrated sulfuric acid. Below 150 ℃, tantalum will not be corroded by concentrated sulfuric acid; only above this temperature, it will react.
4. Chemical elements according to ASTM B708
| Element | R05200 | R05400 | R05255 | R05252 |
| C | 0.01 | 0.01 | 0.01 | 0.01 |
| O | 0.015 | 0.03 | 0.015 | 0.015 |
| N | 0.01 | 0.01 | 0.01 | 0.01 |
| H | 0.0015 | 0.0015 | 0.0015 | 0.0015 |
| Fe | 0.01 | 0.01 | 0.01 | 0.01 |
| Mo | 0.02 | 0.02 | 0.02 | 0.02 |
| Nb | 0.1 | 0.1 | 0.1 | 0.5 |
| Ni | 0.01 | 0.01 | 0.01 | 0.01 |
| Si | 0.005 | 0.005 | 0.005 | 0.005 |
| Ti | 0.01 | 0.01 | 0.01 | 0.01 |
| W | 0.05 | 0.05 | 9.0~11.0 | 2.0~3.5 |
| Ta | remainder | remainder | remainder | remainder |
5. Applications of the Ta foil strip
Tantalum can perform functions in the chemical, electronic, electrical, and other industries that were formerly performed by the pricey metal platinum, resulting in a significant decrease in necessary cost, and tantalum is manufactured into capacitors and equipped with military equipment.
Tantalum forms a stable anodic oxide film in an acidic electrolyte. Tantalum foil-based electrolytic capacitors have the benefits of high capacity, compact size, and excellent reliability. Capacitor making is the most important use of the foil. The amount of tantalum accounted for in the late 1970s. The overall dosage exceeds two-thirds. Tantalum is also a material to manufacture electron emission pipes and high-power electron tube parts.
Tantalum is easy to process and form and can be used as supporting accessories, heat shields, heaters, and heat sinks in high-temperature vacuum furnaces. Ta foil can also be used as orthopedic and surgical materials.
6. Our advantages
We have advanced equipment, rolling process control, annealing temperature, and time control that can effectively avoid the wrinkling phenomenon on the surface of tantalum foil, ensure flatness and finish, and effectively improve product quality.
7. Package and delivery
With pearl cotton inside and a hardwood casing outside, they are wrapped in white paper or waterproof film.
We cooperate with international express companies like FedEx, DHL, TNT, etc. Air and sea freight are also available. We deliver customers good quality products with a short lead time because we have raw material in stock, and if you buy tantalum foil from us, a 3rd party test report is also supported. Welcome to call us for an inquiry.
FAQ
Q: 1. Why does the chemical industry use expensive tantalum foil?
A: Although tantalum foil has a high unit price, in highly corrosive environments (such as equipment used in the manufacture of hydrochloric acid and nitric acid), its service life far exceeds that of stainless steel or titanium, and it ensures product purity, avoiding the huge losses from frequent equipment replacements. Therefore, its total life-cycle cost is actually lower.
Q: 2. Besides capacitors, what other high-end applications does tantalum foil have?
A: In the aerospace field, it can be used as a lining for rocket engine thrust chambers; in the medical field, its biocompatibility makes it suitable for use in neurosurgical repair patches and the encapsulation of implantable medical devices.
Q: 3. How to safely store tantalum foil?
A: It should be stored in a dry, ventilated, and clean warehouse, avoiding contact with acids, alkalis, and other chemicals. The original packaging (such as wrapped in a hard plastic cylinder, sealed with moisture-proof paper and plastic film, and then placed in a wooden crate) should not be damaged before use to prevent injury and moisture.
Q: 4. Are tantalum foils used in solid-state batteries or new energy storage applications?
A: Yes, they have potential. Tantalum's high chemical stability and the properties of its oxide film allow it to serve as a stable interface layer between the solid electrolyte and the electrode, suppressing side reactions. Simultaneously, the three-dimensional porous tantalum foil, acting as a current collector, can increase the loading of active materials and improve battery energy density.
Q: 5. Tantalum foil is said to be corrosion-resistant; under what conditions will it fail?
A: Although tantalum is immune to most acids, it has three major weaknesses: 1) Hydrofluoric acid (HF), even trace amounts of fluoride ions can rapidly corrode tantalum; 2) High-temperature concentrated sulfuric acid (>150℃) and fuming sulfuric acid; 3) Strong alkaline solutions, especially high-temperature molten alkalis, will severely corrode tantalum. Furthermore, in high-temperature hydrogen-containing atmospheres, tantalum absorbs hydrogen and becomes brittle.
Q: 6. Can tantalum foils be used in flexible electronic devices?
A: Theoretically, yes. Ultra-thin tantalum foils possess a certain degree of flexibility and can be used as flexible substrates or flexible electrodes. For example, functional materials can be directly deposited on ultrathin tantalum foil to fabricate flexible sensors or micro-energy devices. Its excellent corrosion resistance can also improve the lifespan of these devices in complex environments.
Q: 7. What new opportunities are there for tantalum foil in the hydrogen energy field?
A: In high-temperature water electrolysis for hydrogen production and proton exchange membrane electrolyzers, tantalum can be used as a corrosion-resistant coating for bipolar plates or gas diffusion layers, replacing expensive precious metal coatings. Furthermore, tantalum has a certain affinity for hydrogen, making it a candidate material for hydrogen separation membranes under specific conditions.
Contact information:
Tel: +86-0917- 3664600
WhatsApp: +8618791798690
Email: sales@tmsalloy.com
tina@tmsalloy.com
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