Relationships between the texture and structure of BaTiO3 and its tetragonal->cubic transition enthalpy

被引:26
作者
Gotor, FJ
Real, C
Dianez, MJ
Criado, JM
机构
[1] Inst. de Cie. de los Mat. de Sevilla, Sevilla
关键词
D O I
10.1006/jssc.1996.0183
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
A nanometric BaTiO3 powder sample with a medium crystallite size D = 157 Angstrom has been prepared from the thermal decomposition of BaTiO(C2O4). 4.5H(2)O by constant rate thermal analysis (CRTA), Rietveld analysis of the XRD pattern shows that this BaTiO3 sample presents a crystalline cubic structure, The evolution of the texture, the structure, and the ferroelectric --> paraelectric enthalphy transition as a function of the annealing temperature of BaTiO3 has been followed from XRD and DSC experiments, A relationship has been found between the reaction enthalphy of the tetragonal --> cubic polymorphic transition and the tetragonality of the sample, as measured from the c/a ratio, Therefore, the calorimetric data can be used for predicting the structure of this material, The Curie temperature seems to independent of the crystallite size D, provided that it is higher than about 400 Angstrom. (C) 1996 Academic Press, Inc.
引用
收藏
页码:301 / 305
页数:5
相关论文
共 29 条
[1]  
ARTL G, 1990, FERROELECTRICS, V104, P217
[2]  
ARTL G, 1985, J APPL PHYS, V58, P619
[3]  
Bell A, 1984, FERROELECTRICS, V54, P147
[4]  
BERNARD P, 1993, POWDER DIFF, V8, P39
[5]   INDEXING OF POWDER DIFFRACTION PATTERNS FOR LOW-SYMMETRY LATTICES BY THE SUCCESSIVE DICHOTOMY METHOD [J].
BOULTIF, A ;
LOUER, D .
JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1991, 24 (pt 6) :987-993
[6]   ALKOXIDE HYDROXIDE ROUTE TO SYNTHESIZE BATIO3-BASED POWDERS [J].
CHAPUT, F ;
BOILOT, JP ;
BEAUGER, A .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1990, 73 (04) :942-948
[7]   PREPARATION OF BARIUM TITANYL OXALATE TETRAHYDRATE FOR CONVERSION TO BARIUM TITANATE OF HIGH PURITY [J].
CLABAUGH, WS ;
SWIGGARD, EM ;
GILCHRIST, R .
JOURNAL OF RESEARCH OF THE NATIONAL BUREAU OF STANDARDS, 1956, 56 (05) :289-291
[8]   INFLUENCE OF THE GRINDING OF PBCO3 ON THE TEXTURE AND STRUCTURE OF THE FINAL PRODUCTS OF ITS THERMAL-DECOMPOSITION [J].
CRIADO, JM ;
GONZALEZ, F ;
GONZALEZ, M ;
REAL, C .
JOURNAL OF MATERIALS SCIENCE, 1982, 17 (07) :2056-2060
[9]   APPLICATION OF THE CONSTANT RATE THERMAL-ANALYSIS TECHNIQUE TO THE MICROSTRUCTURE CONTROL OF BATIO3 YIELDED FROM COPRECIPITATED OXALATE [J].
CRIADO, JM ;
GOTOR, FJ ;
REAL, C ;
JIMENEZ, F ;
RAMOS, S ;
DELCERRO, J .
FERROELECTRICS, 1991, 115 (1-3) :43-48
[10]   CORRELATION BETWEEN CRYSTALLITE SIZE AND MICROSTRAINS IN MATERIALS SUBJECTED TO THERMAL AND OR MECHANICAL TREATMENTS [J].
CRIADO, JM ;
GONZALEZ, M ;
REAL, C .
JOURNAL OF MATERIALS SCIENCE LETTERS, 1986, 5 (04) :467-469