Piezoelectric ceramic and method for producing piezoelectric cer

Details Piezoelectric ceramic and method for producing piezoelectric cer Piezoelectric ceramic and method for producing piezoelectric cer

1999-04-13

2000-06-27

Koslow, C. Melissa

Compositions

Piezoelectric

Lead, zirconium, titanium or compound thereof containing

310364, 501134, 501135, 501136, C04B 35493, H01L 4100, H01L 41083

Patent

active

060803282

ABSTRACT:
The present invention provides a method for producing a piezoelectric ceramic element in which evaporation of Pb contained in a piezoelectric material is prevented and which allows use of inexpensive metal as an electrode material without substantial deterioration of piezoelectric characteristics. The method includes the steps of (1) mixing at least oxides of Pb, Zr, Ti, Cr and Nb; (2) calcining the mixture; (3) crushing the calcined product and adding a Cu component in an amount of about 0.05-3.0 wt. % calculated as CuO; (4) adding a binder to the Cu-component-containing mixture; (5) molding the binder-containing mixture; (6) firing the molded product at 1100.degree. C. or less to produce a sintered product; and (7) forming electrodes on surfaces of the sintered product, the sintered product containing a primary component represented by the formula:

REFERENCES:
patent: 5798052 (1998-08-01), Ando et al.

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