Piezoelectric ceramics

Details Piezoelectric ceramics Piezoelectric ceramics

1999-02-11

2000-07-18

Koslow, C. Melissa

Compositions

Piezoelectric

501134, 501135, 501136, H01L 4100, C04B 35475, C04B 35472, C04B 35499

Patent

active

060903066

ABSTRACT:
Provided is a piezoelectric ceramic which achieves a high density, good temperature characteristics and a high Curie temperature, which can fully prevent (a) a decrease in Qmax (Qmax refers to a tan.theta.max when the maximum value of phase angles of third harmonic is a .theta.max), (b) a decrease in q (dynamic range of resonance frequency), (c) an increase in a fundamental wave and (d) the occurrence of a spurious mode in the vicinity of third harmonic, caused by downsizing, and which can materialize a small-sized high-performance piezoelectric element, the piezoelectric ceramic having a composition of the general formula,

REFERENCES:
patent: 4601841 (1986-07-01), Yasuda et al.

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