METHOD OF PRODUCING COMPOSITE SENSITIVE PIEZOELECTRIC CELL Russian patent published in 2019 - IPC H04R17/00 

FIELD: manufacturing technology.

SUBSTANCE: use: for production of composite sensitive piezoelectric cell. Summary of invention consists in the fact that on end surfaces of piezoceramic frame having open pores and total porosity of 40–60 %, electrodes are applied by burning a silver-containing paste, the obtained workpiece is polarized, soldered to wire electrodes and a piezoelectric cell is covered with a layer of elastic polymer. Method is characterized by that before application of the silver-containing paste on the end surfaces of the piezoceramic frame a uniform layer of organic polymer is applied and dried until formation of a thin-film coating.

EFFECT: increased volumetric sensitivity to sound pressure as to voltage, as well as reduced consumption of silver-containing paste during application of electrodes.

3 cl, 3 dwg, 2 tbl