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Tadashi TAKENAKA Yasushi SOMA Koichiro SAKATA
Lead zirconate PbZrO3-based materials were studied as a new piezoceramic group based on their dielectric and piezoelectric properties. In the PbZrx(ZN1/3Nb2/3)1xO3 system, the antiferroelectric phase changes to the ferroelectric phase at x=0.930.94. Piezoelectric properties are characterized by the large coupling factor of the thickness shear mode.