Method for producing a piezoceramic

Details Method for producing a piezoceramic Method for producing a piezoceramic

1994-05-05

1995-06-20

Bell, Mark L.

Compositions

Piezoelectric

501134, C04B 35491, H01B 108

Patent

active

054258898

ABSTRACT:
In a method for producing a PZT piezoceramic, an intermediate compound is formed having the formula Zr.sub.x Ti.sub.1-x (O.sub.2 (ZTO) in a hydrothermal process. A ceramic having a desired zirconium/titanium ratio can be produced from two such ZTO powders having respectively different x-values. These powders are blended with lead oxide, and if desired with dopants, and are converted into a PZT powder by calcining. The calcined PZT powder is then sintered to form a high-density PZT ceramic which can be aligned precisely at the morphotropic phase boundary.

REFERENCES:
patent: 4990324 (1991-02-01), Tomita et al.
"Optimum Preparation Methods for Piezoelectric Ceramics and Their Evaluation", Yamamoto, Ceramic Bulletin, vol. 71, No. 6, 1992 (pp. 978-985). no month.

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