Piezoelectrics, piezoelectric element, and piezoelectric...

Details Piezoelectrics, piezoelectric element, and piezoelectric... Piezoelectrics, piezoelectric element, and piezoelectric...

2009-03-12

2011-12-13

Koslow, Carol M (Department: 1734)

Compositions

Piezoelectric

Lead, zirconium, titanium or compound thereof containing

C501S134000, C310S311000

Reexamination Certificate

active

08075795

ABSTRACT:
A piezoelectric body includes a perovskite type compound that is expressed by a compositional formula being Pb (ZrxTi1-x)1-yMyO3, where M is at least one of Ta and Nb, x is in a range of 0.51≦x≦0.57, and y is in a range of 0.05≦y<0.2, wherein the perovskite type compound contains at least one of SiO2and GeO2as an additive, and the additive is added in an amount of 0.5 mol % or higher but 5 mol % or lower with respect to the amount of perovskite type compound.

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Haccart, T. et al., Piezoelectric Properties of PZT: Influence of (Zr/Ti) Ratio and Niobium Substitution, Ferroelectrics, Taylor & Francis; Philadelphia, Pa., Ferroelectrics, 2001, vol. 254, pp. 185-195.
Dvorsek, M. et al., “Microstructural and Electromechanical Properties of Donor Doped PZT Ceramics”, Science of Ceramics, Swedish Institute for Silicate Research, Gothenburg, 1988, vol. 14, pp. 951-956.

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