Piezoelectric ceramics (PCM)
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Piezoelectric ceramics are composed of lead titanate PbTiO3,lead zirconate PbZrO3 and lead niobium magnesium tri-oxide Pb( Mg 1/3, Nb 2/3)O3.These ceramics are made by sintering moulded powders ; powder formation allows piezoelectric ceramics to be produced in a great variety of shapes compared to piezoelectric single crystals. The applications of PCM include: 1) Filters for electrical equipment, taking advantage of PCM resonance characteristics; 2) High-voltage generating elements (igniters and ignition elements); 3) Ultrasonic wave oscillators ..ultrasonic signal transmitting and receiving elements) ; 4) Electro-mechnical transducers, of which the most representative example is the phonograph pick-up.
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