Piezoelectric porcelain and method for preparation thereof

Details Piezoelectric porcelain and method for preparation thereof Piezoelectric porcelain and method for preparation thereof

2007-12-18

2007-12-18

Koslow, C. Melissa (Department: 1755)

Compositions

Piezoelectric

C501S134000, C501S135000, C501S136000

Reexamination Certificate

active

10479576

ABSTRACT:
Provided is a piezoelectric ceramic with a wider operating temperature range capable of obtaining a larger amount of displacement and being easily sintered, as well as being superior in terms of ultra-low emission, environmental friendliness and ecology. A piezoelectric substrate1comprises a composition including a perovskite-type oxide (Na1−x−y−zKxLiyAgz)(Nb1−wTaw)O3and a tungsten bronze-type oxide M(Nb1−vTav)2O6(M is an element of Group 2 in the long form of the periodic table of the elements). The values of x, y and z are preferably within a range of 0.1≦x≦0.9, 0≦y≦0.2, and 0≦z≦0.05, respectively. The content of the tungsten bronze-type oxide is preferably 5.3 mol % or less. Thereby, a higher Curie temperature and a larger amount of displacement can be obtained, and sintering can be more easily carried out.

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