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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 ab

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.

대표청구항 ▼

[ What is claimed is:] [1.] A crystal-oriented ceramic comprising an isotropic perovskite-type-structured oxide and having a degree of crystal orientation of not smaller than 10% as measured according to the Lotgering method wherein at least a part of said oxide is oriented relative to the {100} pla

[ What is claimed is:] [1.] A crystal-oriented ceramic comprising an isotropic perovskite-type-structured oxide and having a degree of crystal orientation of not smaller than 10% as measured according to the Lotgering method wherein at least a part of said oxide is oriented relative to the {100} plane of the perovskite-type structure as expressed in the form of a pseudo-cubic system and contains at least one element of Bi, Sr and Ca.