Tantalum pentoxide also called tantala has the chemical formula Ta2O5. Tantalum pentoxide has a dielectric coefficient (K) of 25-100 and a refractive index of 2.27, which is used in anti-reflection coatings in optical lenses, charge capacitors in DRAM devices, low voltage organic thin film transistors and in “gate” dielectric applications.
As the source of Ta2O5, tantalum element is in the fifty-fourth place in terms of availability in the earth. The most important minerals containing tantalum are tantalite- (Fe, Mn)Ta2O6, vodginite- (Ta, Nb, Sn, Mn, Fe)16O32, microlite- (Na, Ca)(Ta, Nb)2O6F and columbite- (Fe, Mn)(Nb, Ta)2O6. Many tantalum-containing ores such as tantalite, vodginite columbite and microlite contain significant amounts of niobium (Nb). The methods used for the production of pure Ta2O5 were determined as follows:
Ion displacement method
OS (OSRAM SYLVANIA) method
Entekno Materials has producing capability of tantalum pentoxide with high purity (up to 4N) and controlled physical properties.
Morphology controlled, high purity tantalum pentoxide powder has been developed by Entekno Materials for capacitor and optical applications.
CHEMICAL AND PHYSICAL PROPERTIES
Purity: > %99.95
Particle Size: 2-6 µm
Color: White powder
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