Piezoelectric ceramic composition

Details Piezoelectric ceramic composition Piezoelectric ceramic composition

1996-12-18

1998-08-25

Bonner, Melissa

Compositions

Piezoelectric

501134, C04B 3549, C04B 35491, C04B 35493

Patent

active

057980527

ABSTRACT:
A piezoelectric ceramic composition consists essentially of a composite oxide with perovskite structure comprising Pb, Zr and Ti, and contains, as the side component, at least one of Mn and Cr, and further contains Cu. Preferably, the composition still further contains W, more preferably at W/Cu.gtoreq.1.1. Even more preferably, the composition has an excess Pb content larger than the stoichiometric amount of Pb in site A of the composite oxide when represented by the general formula, ABO.sub.3. The composition can be sintered at low temperatures and has good piezoelectric characteristics, for example, a high electromechanical coupling factor.

REFERENCES:
patent: 5433917 (1995-07-01), Srivastava et al.

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