Synthesis of Nanopowders of Pentoxides Ta_(2y)Nb_(2(1-y)) O5

摘要

The processes of production of high purity nanopowders of niobium and tantalum pentoxide Ta_(2y)Nb_(2(1-y)) O5 with a low content of fluorine and Nb2O5 in low-temperature polymorph were studied. Ceramic samples were prepared from a charge of solid solutions LiTa_yNb_(1-y)O3 and Li_xNa_(1-x)Ta_yNb_(1-y)O3 synthesized using coprecipitated pentoxide Ta_(2y)Nb_(2(1-y)) O5. Therewith for solid solutions Li_xNa_(1-x)Ta_yNb_(1-y)O3 significantly larger values of high dielectric constant and ionic conductivity were achieved compared to the solid solutions obtained by using a mechanical mixture of Ta2O5 and Nb2O5. This converts solid solutions Li_xNa_(1-x)Ta_yNb_(1-y)O3 from acoustoelectronic and piezoelectric type of materials into the capacitor and ion-conductive type of solid materials.