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2. 发明公开

EP0739866A1 Piezoelectric ceramics 失效
标题翻译： Piezoelektrische Keramiken
公开(公告)号：EP0739866A1
公开(公告)日：1996-10-30
申请号：EP96106134.8
申请日：1996-04-18
申请人： MURATA MANUFACTURING CO., LTD.
发明人： Hayashi, Kohichi, c/o Murata Manufact. Co., Ltd. , Nada, Kenichi, c/o Murata Manufact. Co., Ltd. , Shiratsuyu, Kosuke, c/o Murata Manufact. Co., Ltd.
IPC分类号： C04B35/493 , H01L41/24
CPC分类号： H01L41/187 , C04B35/493
摘要： A piezoelectric ceramic which maintains a high piezoelectric property in a composition having MPB structure and has an excellent ability for stabilizing the resonant frequency is provided. The piezoelectric ceramic has a solid solution expressed by the general expression xPbTiO3 - (1-x) PbZrO3 as its main component. The value of x in the above general expression causes the piezoelectric ceramic to have a composition having the morphotropic phase boundary structure. A ceramic having a spinel type structure is dispersed within the structure of the piezoelectric ceramic. The amount of the ceramic having the spinel type structure existing in the structure is set at about 5 volume % or less. Co2TiO4, Mn3O4, Fe3O4, Mg2TiO4 and a ceramic having a compound spinel type structure which is a solid solution of them can be used as the ceramic having the spinel type structure.
摘要翻译：提供了一种在具有MPB结构的组合物中保持高压电性能并且具有优异的稳定谐振频率的能力的压电陶瓷。压电陶瓷具有以通式xPbTiO3 - （1-x）PbZrO3为主要成分表示的固溶体。上述一般表达式中的x的值使得压电陶瓷具有具有正电相边界结构的组成。具有尖晶石型结构的陶瓷分散在压电陶瓷的结构内。存在于结构中的具有尖晶石型结构的陶瓷的量设定为约5体积％以下。 Co2TiO4，Mn3O4，Fe3O4，Mg2TiO4和具有尖晶石型结构的化合物尖晶石型结构的陶瓷可以用作具有尖晶石型结构的陶瓷。

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