METHOD OF OBTAINING COMPOSITE PIEZOMATERIAL Russian patent published in 2017 - IPC H01L41/20 C04B35/49 

FIELD: chemistry.

SUBSTANCE: mixed powder synthesized piezoceramic material with a blowing agent powder in a weight ratio, which ensures obtaining of a porous ceramic matrix with closed pores, by adding polyvinyl plasticiser, moulding and calcination of the workpiece, characterised in that the powder is used as a blowing agent powder crystalline corundum (α-Al₂O₃) with a mean particle size of 40-400 microns in an amount of 10-20 vol. %.

EFFECT: reduction in mechanical quality factor of the piezoceramic element.

2 cl, 3 dwg, 1 tbl