Polymorphism of niobium pentoxide and properties of alkali metal niobates - the basis of ferropiezoelectric materials

The significant effect of the niobium pentoxide polymorphous modifications on the properties of the synthesized powders and ceramics of the alkali metal niobates is established. It is shown that the transition from the two-phase into the single-phase state by the Nb2O5 thermal treatment leads to the phase equilibrium shift in the solid solutions formed on the basis thereof improvement of their crystalline structure and extreme behavior of the electrophysical parameters. The conclusion is made on the expediency of applying the obtained results by developing practically important ferropiezoelectrical materials