LAMINATED PIEZOELECTRIC ELEMENT

To provide a laminated piezoelectric element in which occurrences of dielectric breakdown and breakage are suppressed even when a high voltage is applied and used for a long time.SOLUTION: The laminated piezoelectric element includes: rectangular laminate 11 in which a plurality of piezoelectric lay...

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Bibliographic Details
Main Authors MATSUI YUKIHIRO, ITO FUMIHISA
Format Patent
LanguageEnglish
Japanese
Published 12.09.2019
Subjects
ELECTRICITY
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Summary:To provide a laminated piezoelectric element in which occurrences of dielectric breakdown and breakage are suppressed even when a high voltage is applied and used for a long time.SOLUTION: The laminated piezoelectric element includes: rectangular laminate 11 in which a plurality of piezoelectric layers 15 and one or more internal electrodes 13 are alternately laminated; and a connection electrode connected to one end portion 13a of one or more internal electrodes 13. The laminated piezoelectric element has electric field relaxation regions 16c, 16d in which internal electrodes are formed discontinuously at least at one of two corners 13c, 13d in the other end portion 13b facing the one end portion 13a of the internal electrode.SELECTED DRAWING: Figure 3 【課題】高電圧を印加して長時間使用しても絶縁破壊及び破損の発生が抑制された積層型圧電素子を提供する。【解決手段】複数の圧電体層１５及び１以上の内部電極１３が交互に積層されてなる矩形状積層体１１と、１以上の内部電極１３の一の端部１３ａに接続された接続電極と、を備える積層型圧電素子であって、内部電極の一の端部１３ａと向かい合う他方の端部１３ｂにおいて、２つの角部１３ｃ及び１３ｄの少なくとも一方に、内部電極が不連続に形成されてなる電界緩和領域１６ｃ及び１６ｄを有する積層型圧電素子とする。【選択図】図３
Bibliography:Application Number: JP20180039497