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A platform for research: civil engineering, architecture and urbanism
PIEZOELECTRIC/DIELECTRIC CERAMICS, PIEZOELECTRIC ELEMENT AND SOUNDING BODY
To provide an alkali niobium acid-based piezoelectric/dielectric ceramics which enables a highly reliable piezoelectric element and/or a highly reliable ceramics capacitor to be obtained and which can be produced by a simple method, and to provide a piezoelectric element, and a sounding body.SOLUTION: A piezoelectric/dielectric ceramics is constituted of a crystal particle 41 containing; a sodium alkali niobium having perovskite-type structure as a main component; and at least one alkali earth metal selected from calcium and barium. In at least one of the crystal particle 41, a ratio of a total mol number of calcium and barium to a mol number of contained niobium is higher than a center portion at a position where a distance from a front surface to a direction of the center portion is 5% of a diameter of the particle.SELECTED DRAWING: Figure 1
【課題】信頼性の高い圧電素子及び／又はセラミックコンデンサを得ることが可能で、簡便な方法にて製造できるアルカリニオブ酸系の圧電／誘電体セラミックス、圧電素子及び発音体を提供する。【解決手段】圧電／誘電体セラミックスは、ペロブスカイト型構造を有するアルカリニオブ酸塩を主成分とし、カルシウム及びバリウムから選択される少なくとも１つのアルカリ土類金属元素を含有する結晶粒子４１で構成され、結晶粒子４１の少なくとも１つが、表面から中心部方向への距離が該粒子の直径の５％にある位置において、含有するニオブのモル数に対するカルシウム及びバリウムの合計モル数の比率が、中心部より高い。【選択図】図１
PIEZOELECTRIC/DIELECTRIC CERAMICS, PIEZOELECTRIC ELEMENT AND SOUNDING BODY
To provide an alkali niobium acid-based piezoelectric/dielectric ceramics which enables a highly reliable piezoelectric element and/or a highly reliable ceramics capacitor to be obtained and which can be produced by a simple method, and to provide a piezoelectric element, and a sounding body.SOLUTION: A piezoelectric/dielectric ceramics is constituted of a crystal particle 41 containing; a sodium alkali niobium having perovskite-type structure as a main component; and at least one alkali earth metal selected from calcium and barium. In at least one of the crystal particle 41, a ratio of a total mol number of calcium and barium to a mol number of contained niobium is higher than a center portion at a position where a distance from a front surface to a direction of the center portion is 5% of a diameter of the particle.SELECTED DRAWING: Figure 1
【課題】信頼性の高い圧電素子及び／又はセラミックコンデンサを得ることが可能で、簡便な方法にて製造できるアルカリニオブ酸系の圧電／誘電体セラミックス、圧電素子及び発音体を提供する。【解決手段】圧電／誘電体セラミックスは、ペロブスカイト型構造を有するアルカリニオブ酸塩を主成分とし、カルシウム及びバリウムから選択される少なくとも１つのアルカリ土類金属元素を含有する結晶粒子４１で構成され、結晶粒子４１の少なくとも１つが、表面から中心部方向への距離が該粒子の直径の５％にある位置において、含有するニオブのモル数に対するカルシウム及びバリウムの合計モル数の比率が、中心部より高い。【選択図】図１
PIEZOELECTRIC/DIELECTRIC CERAMICS, PIEZOELECTRIC ELEMENT AND SOUNDING BODY
圧電／誘電体セラミックス、圧電素子及び発音体
HATANO KEIICHI (author) / TSUKAGOSHI KOICHI (author) / HAMADA HIROSHI (author) / ISHII SHIGEO (author)
2023-06-29
Patent
Electronic Resource
Japanese
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