Production and dielectric properties of lead-free ceramics with the formula [(Na 0.5 K 0.5 ) 1 − x Li x ](Nb 1 − y − z Ta y Sb z )O 3

The influence of past history on the possibility of obtaining high-density ferroelectric ceramics of solid solutions [(Na 0.5 K 0.5 ) 1 − x Li x ](Nb 1 − y − z Ta y Sb z )O at x = 0–0.14, y = 0, 0.1, 0.2, and z = 0–0.1 is identified. The dynamics of behavior of materials under a field in the process of polarization is evaluated. The relative dielectric permeability of samples in a wide range of temperatures (20–700°C) and frequencies (25 Hz-1 MHz) of a variable electric field is studied. On the basis of study of dielectric, piezoelectric, and elastic properties of solid solutions, prospective objects for further technological elaboration and modification of chemical composition with the goal of improving the electrophysical parameters are selected.