Piezoelectric element, liquid discharge head, ultrasonic motor, and dust removing device
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United States of America Patent
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Nov 21, 2017
Grant Date -
Mar 27, 2014
app pub date -
Dec 22, 2011
filing date -
Jan 7, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A piezoelectric element having an improved piezoelectric constant is provided, and a liquid discharge head, an ultrasonic motor, and a dust removing device, each of which uses the above piezoelectric element, are also provided. A piezoelectric element at least includes a pair of electrodes and a piezoelectric material provided in contact with the pair of electrodes, the piezoelectric material is formed of an aggregate of crystal grains containing barium titanate as a primary component, and among the crystal grains of the aggregate, crystal grains at least in contact with the electrodes have dislocation layers in the grains. A liquid discharge head, an ultrasonic motor, and a dust removing device each use the above piezoelectric element.
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