Piezoelectric ceramic composition and oscillator

Details Piezoelectric ceramic composition and oscillator Piezoelectric ceramic composition and oscillator

2008-10-14

2010-11-23

Benson, Walter (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

Reexamination Certificate

active

07839060

ABSTRACT:
Provided is a piezoelectric ceramic composition which enables the attainment of sufficiently high Qmaxand good temperature characteristics of oscillation frequency F0when applied in an oscillator utilizing third harmonic mode of thickness longitudinal vibration. The piezoelectric ceramic composition contains a composite oxide having a perovskite structure. The composite oxide has a composition expressed by the chemical formula (1), while satisfying 0.91≦α≦1.00, 0<β≦0.08, 0.125≦x≦0.300, 0.020≦y≦0.050, and 0.040≦z≦0.070in-line-formulae description="In-line Formulae" end="lead"?(PbαLnβ)(Ti1−(x+y+z)ZrxMnyNbz)O3  (1)in-line-formulae description="In-line Formulae" end="tail"?where Ln signifies at least one element selected from the group consisting of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu.

REFERENCES:
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patent: A-5-139824 (1993-06-01), None
patent: A-2000-1367 (2000-01-01), None
“Osicllator, Resonator, Filter Latest Technologies,” 1986, Sogo gijutsu Shuppan Co., Ltd., pp. 119-121.

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