FIELD: acoustic electronics; measurement technology. SUBSTANCE: plate is disposed among working surfaces of the converter and metal electrodes of dielectric layers. The plate is cut of lithium iodate monocrystal in perpendicular to hexagonal axis. Dielectric layers restrict diffusion of lithium ions and block electron injection. Thickness of dielectric layers are determined from relation where acoustic parameters of lithium iodate crystal are introduced in material of dielectric layer, as well as long service life of piezoelectric converter and operation frequencies range. EFFECT: prolonged service life; widened dynamic range of voltage of converter. 1 dwg
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