METHOD OF PRODUCTION OF ALKALINE METAMETALS (V) AND SOLID SOLUTIONS ON THEIR BASE Russian patent published in 2005 - IPC

FIELD: production of alkaline metametals (V) used for production of laser, electric optical, ferroelectric materials and special-purpose ceramics.

SUBSTANCE: stoichiometric amount of niobium and/or tantalum oxyhydroxide and lithium nitrate and/or sodium nitrate is subjected to ultrasound treatment in inert organic fluid, mainly white spirit for obtaining mixture of components at size of particles lesser than 1 mcm. In the course of heating this mixture at temperature of 300-350°C, lithium and/or sodium nitrates are decomposed forming respective nitrites. At temperature of 400-450°C, lithium and/or sodium nitrites are decomposed forming respective oxides. At calcination of mixture at temperature of 580-700°C continued for 1-0.5 h, oxides of alkaline metals interact with amorphous niobium and/or tantalum oxyhydroxides forming respective alkaline metametals (V) or solid solutions, type Li_xNa_1-xNb_yTa_1-yO₃. Proposed method is used for production of mono-phase metaniobate or metatantalate of lithium or sodium and solid solutions of stoichiometric composition at low temperature of calcination.

EFFECT: enhanced efficiency; increased yield of product.

5 cl, 6 ex