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A platform for research: civil engineering, architecture and urbanism
PIEZOELECTRIC CERAMIC, AND PIEZOELECTRIC ELEMENT
PROBLEM TO BE SOLVED: To provide piezoelectric ceramic arranged so that the worsening of a piezoelectric property owing to application of a high electric field is suppressed.SOLUTION: A piezoelectric ceramic 11 comprises: a polycrystalline material having an alkali-containing niobate-based perovskite structure as a main phase; and nickel and manganese elements located at crystal grain boundaries of the polycrystalline material. A piezoelectric element comprises: a first internal electrode 12; a second internal electrode 13; and a piezoelectric ceramic layer 11. The ceramic layer 11 includes a polycrystalline material disposed between the first and second internal electrodes 12 and 13, and having an alkali-containing niobate-based perovskite structure as a main phase, and nickel and manganese elements located at crystal grain boundaries of the polycrystalline material.
【課題】高電界の印加による圧電特性の低下が抑制される圧電セラミックスを提供する。【解決手段】圧電セラミックス１１は、アルカリ含有ニオブ酸系ペロブスカイト構造を主相とする多結晶体からなり、多結晶体の結晶粒界にニッケル元素及びマンガン元素がともに存在する。圧電素子は、第１の内部電極１２及び第２の内部電極１３と、圧電セラミックス層１１とを具備する。セラミックス層１１は、第１の内部電極１２と第２の内部電極１３との間に配置された、アルカリ含有ニオブ酸系ペロブスカイト構造を主相とする多結晶体からなり、多結晶体の結晶粒界にニッケル元素及びマンガン元素がともに存在する。【選択図】図３
PIEZOELECTRIC CERAMIC, AND PIEZOELECTRIC ELEMENT
PROBLEM TO BE SOLVED: To provide piezoelectric ceramic arranged so that the worsening of a piezoelectric property owing to application of a high electric field is suppressed.SOLUTION: A piezoelectric ceramic 11 comprises: a polycrystalline material having an alkali-containing niobate-based perovskite structure as a main phase; and nickel and manganese elements located at crystal grain boundaries of the polycrystalline material. A piezoelectric element comprises: a first internal electrode 12; a second internal electrode 13; and a piezoelectric ceramic layer 11. The ceramic layer 11 includes a polycrystalline material disposed between the first and second internal electrodes 12 and 13, and having an alkali-containing niobate-based perovskite structure as a main phase, and nickel and manganese elements located at crystal grain boundaries of the polycrystalline material.
【課題】高電界の印加による圧電特性の低下が抑制される圧電セラミックスを提供する。【解決手段】圧電セラミックス１１は、アルカリ含有ニオブ酸系ペロブスカイト構造を主相とする多結晶体からなり、多結晶体の結晶粒界にニッケル元素及びマンガン元素がともに存在する。圧電素子は、第１の内部電極１２及び第２の内部電極１３と、圧電セラミックス層１１とを具備する。セラミックス層１１は、第１の内部電極１２と第２の内部電極１３との間に配置された、アルカリ含有ニオブ酸系ペロブスカイト構造を主相とする多結晶体からなり、多結晶体の結晶粒界にニッケル元素及びマンガン元素がともに存在する。【選択図】図３
PIEZOELECTRIC CERAMIC, AND PIEZOELECTRIC ELEMENT
圧電セラミックス及び圧電素子
HATANO KEIICHI (author) / KISHIMOTO SUMIAKI (author) / TOSHIDA YUTAKA (author)
2015-08-06
Patent
Electronic Resource
Japanese
| European Patent Office | 2017