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PIEZOELECTRIC MATERIAL, AND PIEZOELECTRIC VIBRATOR, SOUND EMITTER, DETECTOR OF VOICE, ACTUATOR AND PIEZOELECTRIC TRANSFORMER USING THE SAME
PIEZOELECTRIC MATERIAL, AND PIEZOELECTRIC VIBRATOR, SOUND EMITTER, DETECTOR OF VOICE, ACTUATOR AND PIEZOELECTRIC TRANSFORMER USING THE SAME
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机译:压电材料,压电振动器,发声器,声音检测器,执行器和压电变压器(使用相同的压电材料)
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摘要
PROBLEM TO BE SOLVED: To stably and exactly obtain high performance piezoelectric properties by using a composition of a phase boundary between tetragonal system and rhombohedral system, which exhibits excellent piezoelectric properties at a wide temp. range of -40 to 100C. ;SOLUTION: The piezoelectric material 3 is obtained by laminating an electroconductive perovskite oxide 2 on a ferroelectric perovskite oxide 1, and highly electroconductive metal electrodes 4 are provided on both surfaces of the piezoelectric material 3. Two kinds of devices are provided, in one device of which, (a) the layer of the electroconductive perovskite oxide 2 is laminated on one side of the layer of the ferroelectric perovskite oxide 1, and in the other device of which, (b) the layer of the oxide 2 is laminated on both sides of the layer of the oxide 1.;COPYRIGHT: (C)1999,JPO
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