Analysis of composite structures on barium titanate fine particles using synchrotron radiation

被引:12
作者
Hoshina, T
Kakemoto, H
Tsurumi, T
Wada, S
Yashima, M
Kato, K
Takata, M
机构
[1] Tokyo Inst Technol, Dept Met & Ceram Sci, Meguro Ku, Tokyo 1528552, Japan
[2] Tokyo Inst Technol, Dept Mat Sci & Engn, Midori Ku, Yokohama, Kanagawa 2268502, Japan
[3] CREST, JST, Japan Synchrotron Radiat Res Inst, Mikazuki, Hyogo 6795198, Japan
来源
ELECTROCERAMICS IN JAPAN VIII | 2006年 / 301卷
关键词
barium titanate; size effect; nanoparticle; synchrotron radiation XRD; Rietveld method; partial profile relaxation technique; surface relaxation model;
D O I
10.4028/www.scientific.net/KEM.301.239
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The crystal structures of barium titanate (BaTiO3) fine particles with a size around 140 nm were investigated using a synchrotron radiation X-ray diffraction method. The observed diffraction pattern was analyzed by Rietveld method assuming several models. As a result, it is found that the BaTiO3 fine particles have composite structures include (a) a tetragonal region with a constant c/a ratio, (b) a tetragonal region with gradient c/a ratios and (c) a cubic region. In order to estimate these structures, the partial profile relaxation technique was applied in the Rietveld refinement. It is considered that the composite structure is important for the size effect on BaTiO3 fine particles.
引用
收藏
页码:239 / 242
页数:4
相关论文
共 8 条
[1]   Composite structure of BaTiO3 nanoparticle investigated by SR X-ray diffraction [J].
Aoyagi, S ;
Kuroiwa, Y ;
Sawada, A ;
Yamashita, I ;
Atake, T .
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2002, 71 (05) :1218-1221
[2]   DIELECTRIC-PROPERTIES OF FINE-GRAINED BARIUM-TITANATE CERAMICS [J].
ARLT, G ;
HENNINGS, D ;
DEWITH, G .
JOURNAL OF APPLIED PHYSICS, 1985, 58 (04) :1619-1625
[3]   The role of interfaces on an apparent grain size effect on the dielectric properties for ferroelectric barium titanate ceramics [J].
Frey, MH ;
Xu, Z ;
Han, P ;
Payne, DA .
FERROELECTRICS, 1998, 206 (1-4) :337-353
[4]   Grain-size effect on structure and phase transformations for barium titanate [J].
Frey, MH ;
Payne, DA .
PHYSICAL REVIEW B, 1996, 54 (05) :3158-3168
[5]  
HOSHINA T, 2004, T MAT RES SOC JPN, V29, P1207
[6]   Surface relaxation in ferroelectric perovskites [J].
Ishikawa, K ;
Uemori, T .
PHYSICAL REVIEW B, 1999, 60 (17) :11841-11845
[7]   A Rietveld-analysis program RIETAN-98 and its applications to zeolites [J].
Izumi, F ;
Ikeda, T .
EUROPEAN POWDER DIFFRACTION, PTS 1 AND 2, 2000, 321-3 :198-203
[8]   ARRAY-TYPE UNIVERSAL PROFILE FUNCTION FOR POWDER PATTERN FITTING [J].
TORAYA, H .
JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1990, 23 :485-491