公开(公告)号：EP0773594B1

公开(公告)日：1999-07-21

申请号：EP96117960.3

申请日：1996-11-08

申请人： MURATA MANUFACTURING CO., LTD.

发明人： Hayashi, Kohichi ,  Ando, Akira ,  Nagai, Akira ,  Takagi, Hiroshi ,  Hase, Kiyoshi

IPC分类号： H01L41/187

CPC分类号： H01L41/187

公开(公告)号：EP0773594A1

公开(公告)日：1997-05-14

申请号：EP96117960.3

申请日：1996-11-08

申请人： MURATA MANUFACTURING CO., LTD.

发明人： Hayashi, Kohichi ,  Ando, Akira ,  Nagai, Akira ,  Takagi, Hiroshi ,  Hase, Kiyoshi

IPC分类号： H01L41/187

CPC分类号： H01L41/187

摘要： The present invention provides a piezoelectric ceramic having a low mechanical quality coefficient Qm and excellent heat resistance, for example, a piezoelectric ceramic for a filter element which can be applied to surface mounting. The piezoelectric ceramic contains at least a composite oxide of lead, zirconium and titanium, and oxides of manganese, silicon and boron, the concentration of the manganese oxide present in the crystal gain boundary being higher than that in crystal grains of the piezoelectric ceramic.

摘要翻译： 本发明提供一种具有低机械质量系数Qm和优异耐热性的压电陶瓷，例如可应用于表面安装的用于过滤元件的压电陶瓷。 压电陶瓷至少含有铅，锆和钛的复合氧化物以及锰，硅和硼的氧化物，晶体增益边界中存在的氧化锰的浓度高于压电陶瓷晶粒中的浓度。