| 摘要 |
Anisotropically shaped ceramic particles of the present invention are represented by the general formula {(K 1-x-y Na x Li y ) 4 (Nb 1-z Ta z ) 6 O 17 + aMeO b } (where Me is at least one element selected from the group consisting of antimony, copper, manganese, vanadium, silicon, titanium, and tungsten; and b is a positive number determined by the valence of Me), where x, y, z, and a satisfy 0 ‰ x ‰ 0.5, 0 ‰ y ‰ 0.3, 0 ‰ z ‰ 0.3, and 0.001 ‰ a ‰ 0.1, respectively. The anisotropically shaped ceramic particles have a plate-like shape. The average particle size is 1 to 100 µm, and the ratio D/t of a maximum diameter D of a main surface to a thickness t in a direction perpendicular to the main surface is 2 or more, preferably 5 or more. Thus, anisotropically shaped ceramic particles suitable as a reactive template for preparing a crystal-oriented alkali metal niobate-based ceramic can be produced at relatively low production costs without the need for a complicated production process. |
