Piezoelectric ceramic composition and piezoelectric ceramic...

Details Piezoelectric ceramic composition and piezoelectric ceramic... Piezoelectric ceramic composition and piezoelectric ceramic...

2011-03-22

2011-03-22

Koslow, C. Melissa (Department: 1734)

Compositions

Piezoelectric

C501S134000, C310S311000

Reexamination Certificate

active

07910016

ABSTRACT:
A main component has a general formula of {(1−x)(K1-a-bNaaLib)m(Nb1-c-dTacSbd)O3−x(M10.5Bi0.5)nM2O3} (wherein M1 is Ca, Sr or Ba, M2 is Ti, Zr or Sn, 0.005≦x≦0.5, 0≦a≦0.9, 0≦b≦0.3, 0≦a+b≦0.9, 0≦c≦0.5, 0≦d≦0.1, 0.9≦m≦1.1, and 0.9≦n≦1.1). At least one specific element selected from the group consisting of In, Sc, Y, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb and Lu is contained at as in sample numbers 46 to 48, 0.1 to 10 mol in total per 100 mols of the main component (preferably, 1.5 to 10 mol). This provides a piezoelectric ceramic composition and a piezoelectric ceramic electronic component that can have a desired high piezoelectric d constant in a consistent and highly efficient manner in both a very low electric field and a high electric field.

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Written Opinion of the International Searching Authority dated May 2, 2006.

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