专利名称: | Piezoelectric ceramic composition and laminated piezoelectric element |
公开(告)号: | |
公开(公告)日: | 2007-04-11 00:00:00 |
申请(专利)号: | EP20060020835(EP1772442) |
申请日: | 2006-10-04 00:00:00 |
发明(设计)人: | TDK CORP (JP) |
(申请)专利权(人): | IEZUMI KUMIKO (JP);YAMAZAKI JUNICHI (JP) |
内容: | For the purpose of preventing the degradation of the piezoelectric strain properties when Cu is used for internal electrodes, there is provided a piezoelectric ceramic composition including: a composite oxide, as a main constituent thereof, represented by (Pba-bMeb) [(Zn1/3Nb2/3)xTiyZrz]O3 with the proviso that 0.96<=a<=1.03, 0<=b<=0.1, 0.05<=x<=0.15, 0.25<=y<=0.5, 0.35<=z<=0.6, and x+y+z=1, and Me represents at least one selected from Sr, Ca and Ba; and at least one selected from Co, Mg, Ni, Cr and Ga as a first additive to the main constituent in a content of 0.5% by mass or less (not inclusive of 0) in terms of oxide, wherein an electrode made of Cu is to be disposed on the piezoelectric ceramic composition. |
发布日期:2007-08-27 11:20:00