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US 6,548,941 B2Granted
Piezoelectric element
AssigneeMurata Manufacturing Co., Ltd.
InventorsTakuya Sawada, Masahiko Kimura, Akira Ando
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Abstract
A piezoelectric element includes a plurality of piezoelectric layers which contain a bismuth layer compound as the main component of the piezoelectric ceramic composition. The piezoelectric layers are provided with electrodes containing Pd as a main component so that the piezoelectric layers vibrate. At least one of the electrodes and the piezoelectric ceramic composition contains Ag.
Claims19
A piezoelectric element comprising:
- a first piezoelectric layer;
- a second piezoelectric layer positioned beneath the first piezoelectric layer;
- a third piezoelectric layer positioned between the first and second piezoelectric layers;
- a first electrode containing Pd provided on a surface of the first piezoelectric layer;
- and
- a second electrode containing Pd provided on a surface of the second piezoelectric layer,
- wherein the first and second piezoelectric layers are formed from a piezoelectric ceramic composition containing a bismuth layer compound, and at least one of the first and second electrodes and the piezoelectric ceramic composition contain Ag.
4 more elements
A piezoelectric electrode layer for a piezoelectric element, the piezoelectric electrode layer comprising:
- a piezoelectric sheet formed from a piezoelectric ceramic composition containing a bismuth layer compound;
- and
- an electrode containing Pd provided on the piezoelectric sheet, wherein at least one of the electrode and the piezoelectric ceramic composition contain Ag.
Dependencies are inferred from the claim text.