Tantalum is a rare transition metal suitable for replacing platinum as a laboratory equipment. At the same time, Ta is also ductile and can be drawn or foiled. The coefficient of thermal expansion is only 6.6 parts per million. Celsius, toughness is even more than copper.

Chemical properties of tantalum powder
The chemical properties of Ta are extremely resistant to acid. Whether it is chilling or smoldering, it is not suitable for hydrochloric acid, concentrated nitric acid or even "Aqua regia". Of course, Ta is not "invulnerable" and can be influenced in some specific circumstances.

Experiments show that the degree of reaction between Ta and concentrated sulfuric acid varies with temperature. If the reaction time of Ta and concentrated sulfuric acid is set to 1 year, the surface damage thickness of Ta is 0.0004 mm at 150 °C; the surface layer of Ta at 200 °C The damage thickness is 0.006 mm; the reaction is obviously accelerated at 250 ° C, the surface damage thickness of Ta is 0.116 mm; the surface damage thickness of Ta at 300 ° C is 1.368 mm.

This reaction is more severe in sulphuric acid and is replaced by fuming sulphuric acid containing 15% sulfite, which is 15.6 mm at 130 °C. However, this is already the extent that the average metal is far behind. However, Ta is still very afraid of the "acid boss" of hydrofluoric acid.

Of course, tantalum nanopowder is afraid of acid damage. When it comes to a strong base such as lithium potassium and sodium, Ta is a bit imaginary. It is directly KO at 100 °C.

Therefore, it can be summarized as: the alkali is not afraid of acid.

Tantalum Powder Application

Ta's main application is tantalum capacitors, which are used in a variety of electronic equipment. The powder of metal tantalum will form a dense oxide film on the surface, with a one-way conductive valve metal property, and a capacitor made of it. The anodic film is chemically stable, stable in general acidic electrolytes, and has high resistivity (7.5×1010 Ω feels cm), large dielectric constant (27.6), low leakage current, zero drift and temperature drift.

In addition, the operating temperature range can reach -80 ° C -200 ° C, but also has the advantages of high reliability, good seismic performance and long service life. High-quality electrolytic capacitors made of Ta have a capacitance that is more than five times higher than that of ordinary capacitors of the same size, and are widely used in military equipment and high-tech fields. Tantalum capacitors use tantalum powder as a medium and do not contain electrolyte inside, so they are suitable for working in high temperature environments. They have long life, high temperature resistance, high accuracy, and excellent high frequency harmonic performance.

In addition, the specific capacity of tantalum capacitors is very high, which is very suitable for miniaturization. If you need this kind of metal that can resist the fight, please consult us.

SAT nano Technology Material Co., Ltd. can supply tantalum powder with nanoparticle and micron particle with high purity, please feel free to ask us a quote.