Low temperature firable PZT compositions and piezoelectric...

Details Low temperature firable PZT compositions and piezoelectric... Low temperature firable PZT compositions and piezoelectric...

2005-04-12

2005-04-12

Kopec, Mark (Department: 1751)

Compositions

Piezoelectric

Lead, zirconium, titanium or compound thereof containing

C252S06290R, C252S500000, C501S134000, C501S135000, C419S019000, C419S046000

Reexamination Certificate

active

06878307

ABSTRACT:
A piezoelectric ceramic composition firable at a reduced sintering temperature is provided. The main composition is expressed with the general formula:in-line-formulae description="In-line Formulae" end="lead"?[(Pb1-m-n-pSrmBanCdp)(ZrxTi1-x)1-k(BiaMnb)k]O3+yBi2O3+z(Fluorine Compound)in-line-formulae description="In-line Formulae" end="tail"?where 0.00≦m<0.15, 0.00≦n<0.15, 0.00<(m+n)<0.21, 0.00 <p<0.04, 0.50≦x≦0.56, 0.00<a≦1.00, 0.00<b≦1.00, 0.00<k<0.04, 0.00≦y≦1.00(in weight %), 0.00≦z≦1.00(in weight %) and fluorine compound is LiF or MgF2. The ceramic material of the invention can be advantageously used in multilayered piezoelectric ceramic devices, in piezoelectric ceramic transformers, in piezoelectric ceramic actuators or in piezoelectric ceramic transducers.

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Gui et al, “Low-Temperature Sintering of Lead-based Piezoelectric Ceramics,” J. Am. Cer. Sec., 1989, V72(3), 486-491.*
S.Y. Cheng et al : J. Mat. Sci., 21, 571-576 (1986) “The Properties of Low-Temperatur Fired Piezoelectric Ceramics”.
Gui et al: J. Am Ceram Soc., 72[3], 486-91 (1989) “Low-Temperature Sintering of Lead-Based Piezoeletric Ceramics”.
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