专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4830996A Ferroelectric ceramics 失效
标题翻译：铁电陶瓷
公开(公告)号：US4830996A
公开(公告)日：1989-05-16
申请号：US218550
申请日：1988-07-13
申请人： Nobuki Hirai , Yoshihisa Ushida , Takao Ohno
发明人： Nobuki Hirai , Yoshihisa Ushida , Takao Ohno
IPC分类号： C04B35/493 , H01L41/187
CPC分类号： C04B35/493 , H01L41/187
摘要： Ferroelectric ceramics represented by xPbTiO.sub.3 -yPbZrO.sub.3 -zPb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 -mSrTiO.sub.3 -nSnO.sub.2 -pZnO-qBi.sub.2 O.sub.3 -rX wherein x,y,z,m,n,p,q and r represent amounts by mole, respectively, with the proviso that x+y+z being 1, Z is at least one oxide selected from the group consisting of Dy.sub.2 O.sub.3, Ta.sub.2 O.sub.5, and Y.sub.2 O.sub.3, and wherein x is from 0.25 to 0.50, y is from 0.05 to 0.70, z is from 0.05 to 0.70, m is from 0 to 0.10, n is from 0 to 0.04, p is from 0 to 0.04, q is from 0 to 0.02 and r is from 0.005 to 0.02. The disclosed ferroelectric ceramics have increased relative dielectric constant and/or electromechanical coupling factor, and are suitable for use as actuators.

2. 发明授权

US4940681A Ferroelectric ceramic material 失效
标题翻译：铁电陶瓷材料
公开(公告)号：US4940681A
公开(公告)日：1990-07-10
申请号：US356135
申请日：1989-05-24
申请人： Yoshihisa Ushida , Nobuki Hirai , Hiroshi Mase
发明人： Yoshihisa Ushida , Nobuki Hirai , Hiroshi Mase
IPC分类号： C04B35/493 , H01L41/187
CPC分类号： C04B35/493 , H01L41/187
摘要： The present invention relates to a ferroelectric ceramic material which is a Perovskite solid said solution comprising a solid solution represented by the formulaPb.sub.1-a M.sub.a (Mg.sub.1/3 Nb.sub.2/3).sub.x Ti.sub.y Zr.sub.z O.sub.3containing in the solution at least one oxide selected from the group A noted below and at least one oxide selected from the group B noted below, with the proviso that NiO or Fe.sub.2 O.sub.3 is necessarily contained.Group A: La.sub.2 O.sub.3, Bi.sub.2 O.sub.3 and Nd.sub.2 O.sub.3 ;Group B: NiO, Fe.sub.2 O.sub.3, SnO.sub.2 and Ta.sub.2 O.sub.5.The proposed ferroelectric ceramic material has a large piezoelectric strain constant d. The present invention is further directed to a ferroelectric ceramic which is a Perovskite solid solution comprising a solid solution represented by the formulaPb.sub.1-a M.sub.a (Mg.sub.1/3 Nb.sub.2/3).sub.x Ti.sub.y Zr.sub.z O.sub.3wherein M is Ba or Sr, x+y+z is 1, a is from 0 to 0.10, x is from 0.05 to 0.70, y is from 0.25 to 0.50 and z is from 0.05 to 0.70, containing in solution at least one oxide selected from group A noted below and at least one oxide selected from group B noted below, with the proviso that NiO, Fe.sub.2 O.sub.3 or Ta.sub.2 O.sub.5 is necessarily contained, the solid solution further containing in the solid solution MnO.sub.2.Group A: La.sub.2 O.sub.3, Bi.sub.2 O.sub.3 and Nd.sub.2 O.sub.3 ;Group B: NiO, ZnO, Fe.sub.2 O.sub.3, SnO.sub.2 and Ta.sub.2 O.sub.5.

3. 发明授权

US4948767A Ferroelectric ceramic material 失效
公开(公告)号：US4948767A
公开(公告)日：1990-08-14
申请号：US356216
申请日：1989-05-24
申请人： Yoshihisa Ushida , Nobuki Hirai , Hiroshi Mase
发明人： Yoshihisa Ushida , Nobuki Hirai , Hiroshi Mase
IPC分类号： C04B35/493 , H01L41/187
CPC分类号： H01L41/187 , C04B35/493
摘要： The present invention relates to a ferroelectric ceramic material which is a Perovskite solid solution comprising a solid solution represented by the formula:Pb.sub.1-a M.sub.a (Mg.sub.1/3 p0 Nb.sub.2/3).sub.x Ti.sub.y Zr.sub.z O.sub.3containing in the solution at least one oxide selected from the group A noted below and at least one oxide selected from the group B noted below.Group A : La.sub.2 O.sub.3 and Nd.sub.2 O.sub.3 ;Group B : ZnO, SnO.sub.2 and Ta.sub.2 O.sub.5.The proposed ferroelectric ceramic material has a large piezoelectric strain constant d. The present invention is further directed to ferroelectric ceramic which is a Perovskite solid solution comprising a solid solution represented by the formula:Pb.sub.1 -aM.sub.a (Mg.sub.1/3 Nb.sub.2/3).sub.x Ti.sub.y Zr.sub.z O.sub.3wherein M is Ba or Sr, x+y+z is 1, a is from 0 to 0.10, x is from 0.05 to 0.70, y is from 0.25 to 0.50 and z is from 0.05 to 0.70, containing in the solution at least one oxide selected from the group A noted below and at least one oxide selected from the group B noted below, the solid solution further containing in the solid solution MnO.sub.2.Group A : La.sub.2 O.sub.3 and Nd.sub.2 O.sub.3 ;Group B : ZnO and SnO.sub.2.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式