FIELD: physics.
SUBSTANCE: powdered piezoceramic material is mixed with powdered blowing agent. The powdered blowing agent used is pre-sintered starting piezoceramic material with particle size of 10-20 mcm in amount of 40-60 wt %. A polyvinyl plasticiser is added. The workpiece is pressed and burnt.
EFFECT: reduction of pore size to 1-5 mcm, high relative porosity of the composite piezoelectric material, mechanical quality factor and wider operating band of the transducer made from the disclosed piezoelectric material.
2 cl, 3 dwg, 1 tbl
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