PIEZOELECTRIC ELEMENT

A piezoelectric device is formed by simultaneously firing a piezoelectric ceramic mainly composed of a perovskite complex oxide represented by general formula ABO 3 and electrodes mainly composed of copper. The piezoelectric ceramic is represented by Pb ±-a Me a [(M II 1/3 M V (2+b)/3)z Ti x Zr 1-x-...

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Bibliographische Detailangaben
Hauptverfasser:	DEGUCHI, YOICHI, YAMAMOTO, ATSUSHI, HAYASHI, KOICHI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE CONVERSION OR DISTRIBUTION OF ELECTRIC POWER CORRECTION OF TYPOGRAPHICAL ERRORS ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR ELECTRICITY GENERATION i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LIME, MAGNESIA LINING MACHINES METALLURGY PERFORMING OPERATIONS PRINTING REFRACTORIES SELECTIVE PRINTING MECHANISMS SLAG STAMPS TRANSPORTING TREATMENT OF NATURAL STONE TYPEWRITERS
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Beschreibung
Zusammenfassung:	A piezoelectric device is formed by simultaneously firing a piezoelectric ceramic mainly composed of a perovskite complex oxide represented by general formula ABO 3 and electrodes mainly composed of copper. The piezoelectric ceramic is represented by Pb ±-a Me a [(M II 1/3 M V (2+b)/3)z Ti x Zr 1-x-z ]O 3 (wherein Me represents a metal element, M II is an acceptor element which is a divalent metal element, and M V is a donor element which is a pentavalent metal element), and satisfies equations 0.05 z 0.40, 0 < bz/3 0.035, 0.345 x 0.480, 0.965 ± 1.020, and 0 a 0.05. In other words, the B sites contain excessive donors, and thus a piezoelectric device having good piezoelectric characteristics can be obtained even in the cases where a base metal material mainly composed of inexpensive copper is used as the internal electrode material.