GRAIN ORIENTED CERAMIC AND PRODUCTION PROCESS THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a grain oriented ceramic constituted of a polycrystalline body comprising a first perovskite-type alkali-pentavalent metal oxide compound and having high degree of orientation and a production process thereof.

SOLUTION: The grain oriented ceramic is constituted of a polycrystalline body comprising the first perovskite-type alkali-pentavalent metal oxide compound as the main phase in which a specific crystal plane of each grain constituting the polycrystalline body is oriented and has ≥30% average degree of orientation according to the Lotgering's method. The grain oriented ceramic is obtained by mixing a first anisotropically-shaped powder of which developed plane has lattice matching with the specific crystal plane of the first perovskite-type alkali-pentavalent metal oxide compound and a first reaction material capable of reacting with the first anisotropically-shaped powder thereby forming at least the first perovskite-type alkali-pentavalent metal oxide compound and molding and heating the mixture obtained in the mixing such that the first anisotropically-shaped powder is oriented.

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