Niobium oxide powder (nb o ) and a process for its preparation

Details Niobium oxide powder (nb o ) and a process for its preparation Niobium oxide powder (nb o ) and a process for its preparation

C - Chemistry, Metallurgy

01

G

23/229

C01G 33/00 (2006.01)

Patent

CA 2018346

Title: Niobium oxide powder (Nb2O5) and a process for its preparation ABSTRACT OF THE DISCLOSURE Niobium oxide powders in non-agglomerated form with a narrow particle size distribution range, high specific surface area, high purity and 2-20 ppm Fe and 2-30 ppm Ni usable in carbide preparation, ferro alloy melting and as a raw material for optical glasses and electro- ceramic and electro-optical products. The powders are made by precipitation from fluoride solution, filtering, washing, annealing and milling. The washing is carried out to an extent that annealing losses are 10-50 % by weight, the calcining is at 600°C-1000°C and the calci- ned product is finley ground. STA 11

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