中国物理B ›› 2007, Vol. 16 ›› Issue (10): 3125-3128.doi: 10.1088/1009-1963/16/10/051
肖长江1, 迟振华1, 李凤英1, 冯少敏1, 靳常青1, 王晓慧2, 邓湘云2, 李龙土2
Xiao Chang-Jiang(肖长江)a), Chi Zhen-Hua(迟振华)a), Li Feng-Ying(李凤英)a), Feng Shao-Min(冯少敏)a), Jin Chang-Qing(靳常青)a)† , Wang Xiao-Hui(王晓慧)b), Deng Xiang-Yun(邓湘云)b), and Li Long-Tu(李龙土)b)
摘要: Dense nanocrystalline BaTiO3 ceramics with a homogeneous grain size of 30\,nm was obtained by pressure assisted sintering. The ferroelectric behaviour of the ceramics was characterized by the dielectric peak at around 120\,\du, the $P$-$E$ hysteresis loop and some ferroelectric domains. These experimental results indicate that the critical grain size for the disappearance of ferroelectricity in nanocrystalline BaTiO3 ceramics fabricated by pressure assisted sintering is below 30\,nm. The ferroelectric property decreasing with decreasing grain size can be explained by the lowered tetragonality and the `dilution' effect of grain boundaries.
中图分类号: (Domain structure; hysteresis)