Piezoelectric ceramic composition and piezoelectric device

Details Piezoelectric ceramic composition and piezoelectric device Piezoelectric ceramic composition and piezoelectric device

2008-03-25

2010-10-05

Benson, Walter (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C501S134000

Reexamination Certificate

active

07808161

ABSTRACT:
There is provided a piezoelectric ceramic composition that contains Na, Bi, Ti and Co wherein the composition ratio of Na, Bi, Ti and Co in terms of oxides thereof is in the following composition range (1):in-line-formulae description="In-line Formulae" end="lead"?aNa2O-bBi2O3-cTiO2-dCoO  (1)in-line-formulae description="In-line Formulae" end="tail"?where a, b, c and d are mole fractions; 0.03≦a≦0.042; 0.330≦b≦0.370; 0.580≦c≦0.620; 0<d≦0.017; and a+b+c+d=1.

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Seiji Ikegami, et al.; “Piezoelectricity in Ceramics of Ferroelectric Bismuth Compound with Layer Structure”; Japanese Journal of Applied Physics; vol. 13, No. 10, Oct. 1974; pp. 1572-1577.
Tadashi Takenaka, et al.; “Grain-Oriented and Mn-Doped (NaBi)(1-x)/2CaxBi4Ti4O15 Ceramics for Piezo- and Pyrosensor Materials”; Sensors and Materials; 1 (1988); pp. 035-046.
EMAS-6100; “Electrical Test Methods for Piezoelectric Ceramic Vibrators”; published by Standard of Electronic Materials Manufacturers Association of Japan (Mar. 1993), Abstract.

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