PIEZOELECTRIC ELEMENT, LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS, ACTUATOR, SENSOR, AND MOTOR
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United States of America Patent
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Issued Date -
Apr 30, 2015
app pub date -
Oct 23, 2014
filing date -
Oct 25, 2013
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Abandoned
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Abstract
A piezoelectric element used between a lowest use temperature T1 and a highest use temperature T2, includes a first electrode, a piezoelectric layer provided on the first electrode and made of a piezoelectric material including a composite oxide having a perovskite structure, the piezoelectric material having a morphotropic phase boundary which is inclined with respect to a temperature axis, and the piezoelectric material satisfying at least one of formulas T3≦T1≦T4 and T3≦T2≦T4, where T3 is a temperature corresponding to the morphotropic phase boundary at a lowest point and T4 is a temperature corresponding to the morphotropic phase boundary at a highest point and a second electrode provided on the piezoelectric layer.
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