Fabrication and anisotropic electrical property for oriented ceramic of Li-(Nb,Ta)-Ti-O system under high-magnetic field

作     者：Nakano, Hiromi Suzuki, Tohru Kan, Akinori 

作者机构：Toyohashi University of Technology CRFC Center 1-1 Hibarigaoka Tempaku-cho Toyohashi441-8580 Japan National Institute for Materials Science Research Center for Functional Materials 1-2-1 Sengen Tsukuba305-0047 Japan Meijo University Dept. Vehicle and Mechanical Engineering 1-501 Shiogamaguchi Tempaku-ku Nagoya468-8502 Japan 

出 版 物：《Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy》 (Funtai Oyobi Fummatsu Yakin)

年 卷 期：2020年第67卷第4期

页      面：208-212页

核心收录：

基　　金：  (19H02804) 

主　　题：Corundum 

摘      要：The Li1+x-y(Nb,Ta)1-x-3yTix+4yO3 (0.06 ≤ x ≤ 0.33, 0 ≤ y ≤ 0.09) forms a unique and periodical structure as a superstructure. In this work, toward application of the unique qualities of an electro-ceramic, we fabricated oriented bulk ceramics by slip casting in a strong magnetic field of 12 T. The c-axis of the powders was aligned parallel to the magnetic field. As a result, we found anisotropic- electric properties which were caused by a superstructure with intergrowth layers of corundum-type [Ti2O3]2+. In the Li-Nb-Ti-O system, the Qf value parallel to the c-axis was about five times greater than that of perpendicular to the c-axis. We concluded from our analytical and simulation results that the large Qf value parallel to the c-axis was caused from a combination of two factors;one being the anisotropic electron conductivity and the other the anisotropic bonding strength in the superstructure by insertion of the intergrowth layer. © 2020 Japan Society of Powder and Powder Metallurgy.