发明名称 |
Piezoelectric/electrostrictive ceramics sintered body and method of calculating diffuse scattering intensity ratio |
摘要 |
An alkali niobate-based piezoelectric/electrostrictive ceramics sintered body having a large electric-field-induced strain during application of high electric field is provided. The piezoelectric/electrostrictive ceramics sintered body includes, as a main crystal phase, a perovskite type oxide containing at least one type of element selected from the group consisting of Li, Na and K as A site constituent elements and at least one type of element selected from the group consisting of Nb and Ta as B site constituent elements. The number of lattice-strained layers of the piezoelectric/electrostrictive ceramics sintered body is preferably small. A diffuse scattering intensity ratio, which is a ratio of an intensity of diffuse scattering by a lattice-strained layer present near a domain wall to a sum of an X-ray diffraction intensity of a first lattice plane and that of a second lattice plane different in interplanar spacing from the first lattice plane due to crystallographic symmetry reduction is preferably 0.5 or lower. |
申请公布号 |
EP2157066(A2) |
申请公布日期 |
2010.02.24 |
申请号 |
EP20090251880 |
申请日期 |
2009.07.27 |
申请人 |
NGK INSULATORS, LTD. |
发明人 |
KAIGAWA, KAZUYUKI;TANAKA, RITSU;YAMAGUCHI, HIROFUMI |
分类号 |
C04B35/495;C04B35/00;H01L41/083;H01L41/18;H01L41/187;H01L41/22;H01L41/333;H01L41/39 |
主分类号 |
C04B35/495 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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