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99.95% Ta2O5 tantalum oxide powder CAS 1314-61-0

99.95% Ta2O5 tantalum oxide powder CAS 1314-61-0

Chemical properties of tantalum oxide are diamond shaped columns. Melting point 1872 ℃± 10 .

Tantalum oxide, white powder, insoluble in water and acid, soluble in molten potassium bisulfate and hydrofluoric acid. Melting point: 1800 , relative density 8.2g/cm3. The chemical properties are similar to niobium oxide. 

Soluble in molten potassium bisulfate and hydrofluoric acid, insoluble in water and other acids, insoluble in water, acids, and bases (excluding hydrofluoric acid), it is an amphoteric compound that reacts with bases to generate various oxygen-containing salts, such as LiTaO3, KTaO3, Sr2Ta2O7, etc; Tantalum exists in cationic form in acidic solutions, such as TaOPO4, Ta2 (SO4) 5, etc. 

Preparation method

Potassium fluotantalate method: Heat potassium fluotantalate and sulfuric acid to 400 , add water to the reactant until boiling, fully dilute to hydrolyze the acidified solution, generate hydrated oxide precipitation, and then separate, wash, and dry to obtain tantalum pentoxide finished product.

Metal tantalum oxidation method: Dissolve metal tantalum sheets in a mixture of nitric acid and hydrofluoric acid, extract and purify them, precipitate tantalum hydroxide with ammonia water, and then wash, dry, burn, and grind them to obtain finished tantalum pentoxide. 


It is used for drawing lithium tantalate single crystal and manufacturing special optical glass with high refraction and low dispersion, and can be used as catalyst in chemical industry.

Tantalum (V) oxide usage

The product is powder, white or light yellow, mainly used in the production of tantalum powder, tantalum strip and tantalum carbide.

Used for the production of ordinary ceramic piezoelectric ceramics and ceramic capacitors. And the production of optical glass additives and tantalate crystals.


Tantalum Oxide Powder

Classification:Tantalum Oxide

CAS No.:1314-61-0

Other Names:Tantalum Pentoxide


EINECS No.:215-238-2/215-200-5

Place of Origin:Hebei, China

Grade Standard:Electron Grade, Industrial Grade, Medicine Grade


Appearance:White crystal or powder/White Powder/white, odorless powder

Application:special optical glass, catalyst,Ceramic

Brand Name:Suoyi

Model Number:Ta2O5

Product name:Tantalum Oxide


Usage:special optical glass

Grade:Indstrial Grade


Melting point:1800


Molecular Weight:441.89

Usage:for glass, optic and ceramic applications

Solubility in water:negligible

Solubility:insoluble in solvents and most mineral acids, reacts with HF

Density:8.2 g/cm3

particle size:1.5μm-3.0μm ,nano size provided


article size:1-5um

Molecular Weight:441.89

Melt Point:1872 °C

Density:8.2 g/mL at 25 °C(lit.)

Supply Ability

10 Ton/Tons per Month

Packaging & delivery

25 kg drum or as client’s require

vacuum , drum package

Customizing is accepted

Port:Tianjin,Qingdao ,China


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