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PIEZOELECTRIC CERAMIC, METHOD FOR PRODUCING PIEZOELECTRIC CERAMIC, PIEZOELECTRIC ELEMENT AND PIEZOELECTRIC APPARATUS
PROBLEM TO BE SOLVED: To provide a lead-free and alkali-free piezoelectric ceramic having both a piezoelectric constant and a mechanical quality factor especially at a low temperature.SOLUTION: There is provided a piezoelectric ceramic which contains a metal oxide represented by the composition formula (1), 0.04 to 0.36 pt.wt of Mn and 0.042 to 0.850 pt.wt. of Bi in terms of metal based on 100 pts.wt. of the metal oxide, where the piezoelectric ceramic is composed of a plurality of first crystal particles 1501 having a perovskite type structure and a plurality of second crystal particles 1504 having a crystal structure different from the first crystal particles 1501 provided at a grain boundary between the first crystal particles 1501, where the second crystal particles 1504 are mainly composed of at least one metal oxide selected from BaTiOand BaTiO. (BaCa)(TiZr)O(1) (0.09≤x≤0.30, 0.025≤y≤0.085, 0.986≤a≤1.02)SELECTED DRAWING: Figure 15
【課題】特に低温において圧電定数と機械的品質係数が両立した非鉛非アルカリの圧電セラミックスの提供。【解決手段】組成式（１）で表わされる金属酸化物と金属酸化物１００重量部に対して金属換算で０．０４〜０．３６重量部のＭｎ及び０．０４２〜０．８５０重量部のＢｉを含有する圧電セラミックスであって、圧電セラミックスはペロブスカイト型構造を有する複数の第一の結晶粒子１５０１と第一の結晶粒子１５０１間の粒界１５０２に備えられた第一の結晶粒子１５０１とは異なる結晶構造を有する複数の第二の結晶粒子１５０４よりなり、第二の結晶粒子１５０４はＢａ４Ｔｉ１２Ｏ２７及びＢａ６Ｔｉ１７Ｏ４０から選ばれる少なくとも一つの金属酸化物を主成分とする厚電セラミックス。（Ｂａ１−ｘＣａｘ）ａ（Ｔｉ１−ｙＺｒｙ）Ｏ３（１）（０．０９≦ｘ≦０．３０、０．０２５≦ｙ≦０．０８５、０．９８６≦ａ≦１．０２）【選択図】図１５
PIEZOELECTRIC CERAMIC, METHOD FOR PRODUCING PIEZOELECTRIC CERAMIC, PIEZOELECTRIC ELEMENT AND PIEZOELECTRIC APPARATUS
PROBLEM TO BE SOLVED: To provide a lead-free and alkali-free piezoelectric ceramic having both a piezoelectric constant and a mechanical quality factor especially at a low temperature.SOLUTION: There is provided a piezoelectric ceramic which contains a metal oxide represented by the composition formula (1), 0.04 to 0.36 pt.wt of Mn and 0.042 to 0.850 pt.wt. of Bi in terms of metal based on 100 pts.wt. of the metal oxide, where the piezoelectric ceramic is composed of a plurality of first crystal particles 1501 having a perovskite type structure and a plurality of second crystal particles 1504 having a crystal structure different from the first crystal particles 1501 provided at a grain boundary between the first crystal particles 1501, where the second crystal particles 1504 are mainly composed of at least one metal oxide selected from BaTiOand BaTiO. (BaCa)(TiZr)O(1) (0.09≤x≤0.30, 0.025≤y≤0.085, 0.986≤a≤1.02)SELECTED DRAWING: Figure 15
【課題】特に低温において圧電定数と機械的品質係数が両立した非鉛非アルカリの圧電セラミックスの提供。【解決手段】組成式（１）で表わされる金属酸化物と金属酸化物１００重量部に対して金属換算で０．０４〜０．３６重量部のＭｎ及び０．０４２〜０．８５０重量部のＢｉを含有する圧電セラミックスであって、圧電セラミックスはペロブスカイト型構造を有する複数の第一の結晶粒子１５０１と第一の結晶粒子１５０１間の粒界１５０２に備えられた第一の結晶粒子１５０１とは異なる結晶構造を有する複数の第二の結晶粒子１５０４よりなり、第二の結晶粒子１５０４はＢａ４Ｔｉ１２Ｏ２７及びＢａ６Ｔｉ１７Ｏ４０から選ばれる少なくとも一つの金属酸化物を主成分とする厚電セラミックス。（Ｂａ１−ｘＣａｘ）ａ（Ｔｉ１−ｙＺｒｙ）Ｏ３（１）（０．０９≦ｘ≦０．３０、０．０２５≦ｙ≦０．０８５、０．９８６≦ａ≦１．０２）【選択図】図１５
PIEZOELECTRIC CERAMIC, METHOD FOR PRODUCING PIEZOELECTRIC CERAMIC, PIEZOELECTRIC ELEMENT AND PIEZOELECTRIC APPARATUS
圧電セラミックス、圧電セラミックスの製造方法、圧電素子、および圧電装置
KUBOTA JUN (author) / OSHIMA KANAKO (author) / WATANABE TAKETOSHI (author) / SUZUKI TATSUYA (author) / SHIMADA MIKIO (author) / KOYAMA SHINYA (author) / SHIMIZU KOJI (author) / FURUTA TATSUO (author) / TANAKA HIDENORI (author) / HAYASHI JUNPEI (author)
2016-08-04
Patent
Electronic Resource
Japanese
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