Piezoelectric porcelain composition, laminated piezoelectric...

Details Piezoelectric porcelain composition, laminated piezoelectric... Piezoelectric porcelain composition, laminated piezoelectric...

2008-01-29

2008-01-29

Mayes, Melvin (Department: 1734)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S089160

Reexamination Certificate

active

07323073

ABSTRACT:
A piezoelectric ceramic composition including three components, Pb(Zn1/3Nb2/3)O3, PbTiO3, and PbZrO3, and having a basic composition formula of Pb(Zn1/3Nb2/3)xZryTizO3, where 0.90<x+y+z<1.0, exhibits excellent piezoelectric characteristics and heat resistance and has a low sintering temperature of about 900° C., a coupling coefficient Kp not less than 0.50, and a Curie temperature not lower than 300° C. A piezoelectric device using this composition may employ inexpensive silver and silver-palladium alloys containing a high percentage of silver as material of an internal electrode, thus being inexpensive and having excellent characteristics.

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