Evaporation Materials Ta2O5 Granule, Ta2O5 Tablets, Optical Coating Use Ta2O5 99.99%

Evaporation Materials Ta2O5 Granule, Ta2O5 Tablets, Optical Coating Use Ta2O5 99.99%

• MF : Ta2O5
• MW: 441.89
• CAS: 1314-61-0

Tantalum pentoxide, also known as "tantalic anhydride", is a white orthorhombic crystal. It is stable in chemical property, resistant to common acid and alkali, and is not eroded by hydrogen chloride or hydrogen bromide when heated. The corresponding insoluble tantalate can be obtained by CO melting with hydroxide or carbonate of alkali metal, and then hydrolyzed to form hydrated tantalum pentoxide precipitate after washing with water. At present, the traditional high-purity tantalum pentoxide is prepared by liquid-liquid extraction and separation of tantalum and niobium. The tantalum liquid is first put into the neutralization and precipitation tank, and NH3 gas is introduced under stirring to make the solution pH = 8-9 to form ta (OH) 5 precipitation, and then it is filtered through a filter press or vacuum. Then, tantalum hydroxide is put into the decomposition tank again, and dissolved with hydrofluoric acid and sulfuric acid, and then extracted with organic matters to obtain high-purity tantalum liquid, which is neutralized with purified ammonia water to obtain high-purity tantalum hydroxide. High purity tantalum oxide was calcined, cooled and sieved in muffle furnace to obtain high purity tantalum pentoxide.

Tantalum pentoxide is used to prepare tantalum, optical glass, electronic instrument and tantalum carbide intermediate.

There are two kinds of tantalum pentoxide coating materials, which are white, gray white or gray black. The materials sintered under high temperature oxidation atmosphere are white, and those sintered by vacuum reaction are gray white or gray black, which are mainly caused by the formation of low valence compounds due to anoxia. This kind of low valence tantalum oxide will gradually turn white when stored in air for a long time, All three kinds of tantalum pentoxide with different appearance can be used for vacuum coating

Tantalum pentoxide is a good coating material with high refractive index,

It has been used in antireflection coatings, lasers, optical communications, solar cells and other components / tantalum pentoxide film has high dielectric constant and is also thin

Important materials of film capacitor/

Tantalum oxide compounds have many valence states, such as tantalum oxide V tantalum trioxide, tantalum dioxide, etc. as coating materials, tantalum pentoxide is the most common form / soluble in molten potassium bisulfate and hydrofluoric acid. It is insoluble in water or other acids

The raw material of tantalum pentoxide can be dissolved in hydrofluoric acid and nitric acid to form tantalum fluoride acid. The impurities are extracted and separated by sulfuric acid solution. Tantalum hydroxide is precipitated by adding ammonia water and washed, baked and burned/

The common harmful anions such as sulfate, fluorine, and hydrogen peroxide in tantalum pentoxide coating materials have been decomposed and removed in the process of high temperature reaction sintering. The organic impurities can also be eliminated by reasonable oxidation and burning. The harmful inorganic impurities are mainly Fe, Co, Ni, Cr, etc., and their contents are very low