Size Effect of Nanograined BaTiO3 Ceramics Fabricated by Aerosol Deposition Method

被引：60
|
作者：
Hoshina, Takuya [1 ]
Furuta, Tsutomu [1 ]
Kigoshi, Yoichi [1 ]
Hatta, Saki [1 ]
Horiuchi, Naohiro [1 ]
Takeda, Hiroaki [1 ]
Tsurumi, Takaaki [1 ]
机构：
[1] Tokyo Inst Technol, Grad Sch Sci & Engn, Nanophonon Lab, Meguro Ku, Tokyo 1528552, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2010年 / 49卷 / 09期
基金：
日本学术振兴会;
关键词：
BARIUM-TITANATE; DIELECTRIC-PROPERTIES; FILMS;
D O I：
10.1143/JJAP.49.09MC02
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We demonstrated the size effect of nanograined BaTiO3 ceramics using freestanding BaTiO3 thick films fabricated by the aerosol deposition (AD) method. Dense BaTiO3 thick films fabricated by the AD method were crystallized and detached from the SrTiO3 substrate by annealing treatment at 600 degrees C, and then the grain size was controlled by reannealing treatment at various temperatures. As a result, freestanding BaTiO3 thick films with various grain sizes from 24 to 170 nm were successfully obtained. Polarization-electric field (P-E) measurement revealed that BaTiO3 ceramics with grain sizes of more than 58 nm showed ferroelectricity, whereas BaTiO3 ceramics with an average grain size of 24 nm showed paraelectricity at room temperature. Dielectric measurement indicated that the permittivity decreased with decreasing grain size in the range from 170 to 24 nm. The decrease in permittivity was due to the decreases in ferroelectricity and domain-wall contributions with decreasing grain size. (C) 2010 The Japan Society of Applied Physics
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页数：5
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