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US 8,075,795 B2Granted
Piezoelectrics, piezoelectric element, and piezoelectric actuator
AssigneeSeiko Epson Corporation
InventorsYasuaki Hamada, Akio Konishi, Takeshi Kijima
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Abstract
A piezoelectric body includes a perovskite type compound that is expressed by a compositional formula being Pb (Zrx Ti1-x)1-y My O3, 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 SiO2 and GeO2 as 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.
Claims3
A piezoelectric body comprising:
- a perovskite type compound that is expressed by a compositional formula being Pb (Zrx Ti1-x)1-y My O3, 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 SiO2 and GeO2 as 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.
Dependencies are inferred from the claim text.