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2. 发明授权

US6093338A Crystal-oriented ceramics, piezoelectric ceramics using the same, and methods for producing the same 有权
标题翻译：晶体取向陶瓷，使用其的压电陶瓷及其制造方法
公开(公告)号：US6093338A
公开(公告)日：2000-07-25
申请号：US136420
申请日：1998-08-20
申请人： Toshihiko Tani , Tsuguto Takeuchi , Yasuyoshi Saito
发明人： Toshihiko Tani , Tsuguto Takeuchi , Yasuyoshi Saito
IPC分类号： G01L1/16 , C04B35/00 , C04B35/46 , C04B35/462 , C04B35/495 , H01L41/187 , C04B35/475 , C04B35/491 , C04B35/622
CPC分类号： C04B35/495 , C04B35/462 , H01L41/1871 , H01L41/1878 , H01L41/43
摘要： A crystal-oriented ceramic has an isotropic or pseudoisotropic perovskite-type-structure of not smaller than 10% in Lotgering orientation degree. The ceramic may contain at least one of Bi, Sr and Ca. A host material, a raw material capable of producing a guest material and an additive having the ability of converting a host material into a guest material are mixed and roll-pressed, and sintered under heat to give the crystal-oriented ceramic as a large-sized and bulky material. This crystal-oriented ceramic has good crystal orientation-dependent characteristics including piezoelectricity, pyroelectricity, ionic conductivity, giant magneto-resistivity effect, etc. This crystal-oriented ceramic can be produced by orienting epitaxially the polycrystals of an isotropic or pseudoisotropic perovskite oxide according to the orientation of the crystal plane or axis of a host material. The ceramic can be applied to an inexpensive and large-sized device. The host material may be a magnetoplumbite-type-structured or Sr.sub.2 Nb.sub.2 O.sub.7 -type-structured material, and may be composed of morphologically-anisotropic grains.
摘要翻译：晶体取向陶瓷具有不等于10％的Lotogering取向度的各向同性或拟各向异性的钙钛矿型结构。陶瓷可能含有Bi，Sr和Ca中的至少一种。将主体材料，能够生产客体材料的原料和具有将主体材料转化为客体材料的能力的添加剂混合并辊压，并在加热下烧结，得到晶体取向陶瓷作为大尺寸陶瓷，尺寸和体积大的材料。这种晶体取向陶瓷具有良好的晶体取向特性，包括压电性，热电性，离子导电性，巨磁阻效应等。该晶体取向陶瓷可以通过外延取向各向同性或拟各向异性的钙钛矿氧化物的多晶根据主体材料的晶面或轴的取向。陶瓷可以应用于廉价和大尺寸的装置。主体材料可以是磁铅石型结构或Sr2Nb2O7型结构材料，并且可以由形态各向异性晶粒组成。

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