[20p-PB1-1~10] 9.1 誘電材料・誘電体

▲ [20p-PB1-7] Grain-size effect in Barium Titanate ceramics with different Ba/Ti ratios

〇(M2)Piyush Sapkota¹、Ichiro Fujii¹、Shintaro Ueno¹、Satoshi Wada¹ (1.Univ. of Yamanashi)

キーワード：Grain-size effect, Ba/Ti molar ratio, Barium Titanate ceramics

Although grain-size effect has been repeatedly reported in Barium Titanate (BT) ceramics, it has not been reported clearly in Ba-excess or Ti-excess BT ceramics. It is not well established whether grain-size effect is observed in Ba-excess or Ti-excess BT ceramics. Moreover, the properties observed in such non-stoichiometric BT ceramics is not well understood whether they are influenced by Ba/Ti ratio or by grain-size effect. Therefore, in this research, BT ceramics with Ba-excess, stoichiometric and, Ti-excess compositions having similar grain-sizes were fabricated by solid-state synthesis and the resultant properties are compared with respect to Ba/Ti ratios. It is expected that this research would help for better understanding of the influence of stoichiometry on the propeties of BT ceramics.