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Piezoelectric body, piezoelectric device, and liquid discharge apparatus

A piezoelectric and ferroelectric technology, applied in the field of piezoelectrics, which can solve problems such as the inability to maintain operating efficiency

Active Publication Date: 2008-10-29
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As for the piezoelectric device described in Japanese Patent No. 3568107, as in the case of piezoelectric devices using only ordinary electric field-induced stress of ferroelectric substances, if the thickness of the piezoelectric device is reduced, the piezoelectric device with reduced thickness will be compatible with the High applied electric fields in the range of applied electric fields in which substantially no strain displacement is obtained and operating efficiency cannot be kept high

Method used

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  • Piezoelectric body, piezoelectric device, and liquid discharge apparatus
  • Piezoelectric body, piezoelectric device, and liquid discharge apparatus
  • Piezoelectric body, piezoelectric device, and liquid discharge apparatus

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Embodiment 1

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Abstract

A piezoelectric body contains a ferroelectric substance phase having characteristics such that, in cases where an applied electric field is increased from the time free from electric field application, phase transition of the ferroelectric substance phase to a ferroelectric substance phase of a different crystal system occurs at least two times. The piezoelectric body should preferably be actuated under conditions such that a minimum applied electric field Emin and a maximum applied electric field Emax satisfy Formula (1)wherein the electric field E 1 represents the electric field at which the first phase transition of the ferroelectric substance phase begins.

Description

Piezoelectric bodies, piezoelectric devices, and liquid discharge devices technical field The present invention relates to a piezoelectric body comprising a ferroelectric substance phase characterized in that the ferroelectric substance phase can be caused to undergo a phase transition by application of an electric field. The present invention also relates to a piezoelectric device equipped with the piezoelectric body, and a liquid discharge apparatus equipped with the piezoelectric device. Background technique A piezoelectric device equipped with a piezoelectric body and electrodes characterized in that it responds to an applied trans-piezoelectric force has hitherto been used as an actuator or the like mounted on an inkjet type recording head. The electrodes expand and contract with increases and decreases in the electric field of the piezoelectric body, and the electrodes are used to apply the electric field across the piezoelectric body. Hitherto, perovskite-type oxi...

Claims

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Application Information

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IPC IPC(8): H01L41/18H01L41/09B41J2/14
Inventor 坂下幸雄佐佐木勉冈本裕一中井宗纪
Owner FUJIFILM CORP
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