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LEADLESS PIEZOELECTRIC CERAMIC COMPOSITION, PIEZOELECTRIC ELEMENT AND APPARATUS UTILIZING THE SAME
To provide a leadless piezoelectric ceramic composition having good piezoelectric characteristics and a piezoelectric element using the same, and further an apparatus utilizing the piezoelectric element.SOLUTION: A leadless piezoelectric ceramic composition of this invention includes mainly a first crystal phase and second crystal phase, wherein the first crystal phase is a main phase and is constituted by an alkali niobate-based perovskite oxide which is represented by a composition formula of (KNaLiM1)(M2M3)O, and the second crystal phase is an auxiliary phase, dispersedly arranged in a scattered dot-like pattern in the main phase, is constituted by a spinel compound which is represented by a composition formula of (M4,Ti)O, has the first crystal phase included dispersedly therein and has an average particle diameter of D≥20 μm. The leadless piezoelectric ceramic composition has a porosity of 0.1% or less.SELECTED DRAWING: Figure 9
【課題】 圧電特性の良好な無鉛圧電磁器組成物、これを用いた圧電素子、さらにこれを用いた圧電素子利用装置を提供する。【解決手段】 無鉛圧電磁器組成物は、組成式（ＫaＮａbＬｉcＭ１d）e（Ｍ２fＭ３g）Ｏ3+hで表される、ニオブ酸アルカリ系ペロブスカイト酸化物からなる第１結晶相で構成された主相と、主相内に散点状に分散して配置され、組成式（Ｍ４，Ｔｉ）Ｏ4で示されるスピネル化合物からなる第２結晶相を主とし、第１結晶相が分散して包含され、平均粒径がＤ50≧２０μｍである副相と、を有し、空孔率が０．１％以下である。【選択図】図９
LEADLESS PIEZOELECTRIC CERAMIC COMPOSITION, PIEZOELECTRIC ELEMENT AND APPARATUS UTILIZING THE SAME
To provide a leadless piezoelectric ceramic composition having good piezoelectric characteristics and a piezoelectric element using the same, and further an apparatus utilizing the piezoelectric element.SOLUTION: A leadless piezoelectric ceramic composition of this invention includes mainly a first crystal phase and second crystal phase, wherein the first crystal phase is a main phase and is constituted by an alkali niobate-based perovskite oxide which is represented by a composition formula of (KNaLiM1)(M2M3)O, and the second crystal phase is an auxiliary phase, dispersedly arranged in a scattered dot-like pattern in the main phase, is constituted by a spinel compound which is represented by a composition formula of (M4,Ti)O, has the first crystal phase included dispersedly therein and has an average particle diameter of D≥20 μm. The leadless piezoelectric ceramic composition has a porosity of 0.1% or less.SELECTED DRAWING: Figure 9
【課題】 圧電特性の良好な無鉛圧電磁器組成物、これを用いた圧電素子、さらにこれを用いた圧電素子利用装置を提供する。【解決手段】 無鉛圧電磁器組成物は、組成式（ＫaＮａbＬｉcＭ１d）e（Ｍ２fＭ３g）Ｏ3+hで表される、ニオブ酸アルカリ系ペロブスカイト酸化物からなる第１結晶相で構成された主相と、主相内に散点状に分散して配置され、組成式（Ｍ４，Ｔｉ）Ｏ4で示されるスピネル化合物からなる第２結晶相を主とし、第１結晶相が分散して包含され、平均粒径がＤ50≧２０μｍである副相と、を有し、空孔率が０．１％以下である。【選択図】図９
LEADLESS PIEZOELECTRIC CERAMIC COMPOSITION, PIEZOELECTRIC ELEMENT AND APPARATUS UTILIZING THE SAME
無鉛圧電磁器組成物、圧電素子および圧電素子利用装置
KIMURA KENJI (author) / NAKADA DAISUKE (author)
2019-02-28
Patent
Electronic Resource
Japanese
| European Patent Office | 2015
LEADLESS PIEZOELECTRIC CERAMIC COMPOSITION, AND PIEZOELECTRIC ELEMENT
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