Piezoelectric ceramic composition, its production method,...

Details Piezoelectric ceramic composition, its production method,... Piezoelectric ceramic composition, its production method,...

2007-09-11

2007-09-11

McGinty, Douglas (Department: 1751)

Compositions

Piezoelectric

C252S06230R, C257S303000, C501S134000, C423S594800

Reexamination Certificate

active

10391191

ABSTRACT:
This invention provides a piezoelectric ceramic composition that does not contain lead, can be sintered at a normal pressure and is excellent in at least one of a piezoelectric constant, an electro-mechanical coupling coefficient, a dielectric loss, a relative dielectric constant and a Curie point, its production method, and a piezoelectric device and a dielectric device each utilizing the piezoelectric ceramic composition. The invention relates to a piezoelectric composition expressed by the general formula {Lix(K1−yNay)1−x}(Nb1−zSbz)O3, each of x, y and z respectively falling within composition ranges of 0≦x≦0.2, 0≦y≦1.0 and 0≦z≦0.2 (with the exception of x=z=0), and its production method. The invention further relates to a piezoelectric device having a piezoelectric body formed of the piezoelectric ceramic composition described above and a dielectric device having a dielectric body formed of the piezoelectric ceramic composition described above.

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