COMPARISON OF THE PROPERTIES OF NIOBATE FERROELECTRIC PIEZOCERAMICS MODIFIED BY VARIOUS METHODS
The effects of heterovalent modification of ferroactive materials based on alkali metal niobates are considered. A comparison is made of the properties of materials modified in various ways: stoichiometrically with the organization of vacancies in the A or B sublattice, and superstoichiometrically. The dependence of the degree of change in the electrophysical parameters of materials on the concentration of vacancies and the nature of their distribution in the crystal structure has been established. A conclusion is made on the expediency of using the results obtained in the development of ferroelectric ceramic materials based on sodium niobates - lithium.