Structural Transformation of Hexagonal (0001)BaTiO3 Ceramics to Tetragonal (111)BaTiO3 Ceramics

被引：23

作者：

Watanabe, Takayuki ^{[1
]}

Shimada, Mikio ^{[1
]}

Aiba, Toshiaki ^{[1
]}

Yabuta, Hisato ^{[1
]}

Miura, Kaoru ^{[1
]}

Oka, Kengo ^{[2
]}

Azuma, Masaki ^{[2
]}

Wada, Satoshi ^{[3
]}

Kumada, Nobuhiro ^{[4
]}

机构：

[1] CANON Inc, Corp R&D Headquarters, Ota Ku, Tokyo 1468501, Japan

[2] Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan

[3] Univ Yamanashi, Interdisciplinary Grad Sch Med & Engn, Kofu, Yamanashi 4008510, Japan

[4] Univ Yamanashi, Dept Res Interdisciplinary Grad Sch Med & Engn, Kofu, Yamanashi 4008511, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2011年 / 50卷 / 09期

关键词：

BARIUM-TITANATE; BATIO3; NANOTWINS;

D O I：

10.1143/JJAP.50.09ND01

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A ceramic slurry that contains a 6H-type Ba(Ti0.95Mn0.05)O-3 powder was casted into a plaster mold under 10 T magnetic field to form a green compact of (0001)-oriented Ba(Ti0.95Mn0.05)O-3. After sintering the green compact at 1300 degrees C in air, it was confirmed that the (0001)-oriented 6H-type perovskite structure transformed to a (111)-oriented 3C-type perovskite structure. The structural transformation was again examined using hexagonal BaTiO3 prepared by reducing pseudo-cubic BaTiO3 powder in H-2 atmosphere. In this case, the preferred (0001) orientation was not confirmed for the green compacts. After sintering the green compacts at 1300 degrees C in air, mixed crystal orientations of (100)/(001) and (111) were observed for the resultant tetragonal BaTiO3 ceramics. This (100)/(001) orientation was suppressed by annealing the hexagonal BaTiO3 powder at 1000 degrees C before slip-casting, leading to highly (111)-oriented ceramics. It was found that the green compacts of (0001)-oriented hexagonal BaTiO3 can transform into (111)-oriented tetragonal BaTiO3 ceramics, maintaining the macroscopic crystal orientations due to a similar atomic stacking along [0001] of 6H-type BaTiO3 and [111] of 3C-type BaTiO3. (C) 2011 The Japan Society of Applied Physics

引用

页数：4

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