Piezoelectric substance, piezoelectric element, liquid...

Details Piezoelectric substance, piezoelectric element, liquid... Piezoelectric substance, piezoelectric element, liquid...

2011-08-16

2011-08-16

Koslow, C. Melissa (Department: 1734)

Compositions

Piezoelectric

Lead, zirconium, titanium or compound thereof containing

C117S949000, C117S944000, C310S358000, C347S068000, C257S295000

Reexamination Certificate

active

07998362

ABSTRACT:
A main component of a piezoelectric substance is PZT which has a perovskite type structure expressed as Pb(ZrxTi1-x)O3, in which x expresses an element ratio Zr/(Zr+Ti) of Zr and Ti in the formula, an element ratio Pb/(Zr+Ti) of Pb, Zr and Ti of the piezoelectric substance is 1.05 or more, an element ratio Zr/(Zr+Ti) of Zr and Ti is 0.2 to 0.8 inclusive, and a Curie temperature Tc of the piezoelectric substance and a Curie temperature Tc0in bulk at an element ratio of Zr and Ti of the piezoelectric substance satisfy a relation of Tc>Tc0+50° C.

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