Constant Rate Thermal Analysis (CRTA) as a tool for the synthesis of materials with controlled texture and structure

被引:10
作者
Alcalá, MD [1 ]
Gotor, FJ [1 ]
Pérez-Maqueda, LA [1 ]
Real, C [1 ]
Dianez, MJ [1 ]
Criado, JM [1 ]
机构
[1] Univ Sevilla, CSIC, Ctr Mixto, Inst Ciencia Mat, Seville 41092, Spain
来源
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 1999年 / 56卷 / 03期
关键词
CRTA; material synthesis;
D O I
10.1023/A:1010187313720
中图分类号
O414.1 [热力学];
学科分类号
摘要
Some examples of the use of the CRTA method for the synthesis of materials with controlled texture and structure are given. BaTiO3 has been obtained from the thermal decomposition of Barium Titanyl Oxalate (BTO) and Barium Titanyl Citrate (BTC) by controlling the reaction temperature in such a way that the partial pressure of the gases generated in the reaction was maintained constant at a value close to 10(-2) mbar. It has been shown that this method allows getting BaTiO3 with crystal sizes considerably lower than those obtained by decomposing the same precursors by conventional methods. This small crystal sizes lead to the stabilisation of the metastable cubic phase with regards to the tetragonal phase. It has been also shown that the control of the CO generated in the carbothermal reduction of silica allows tailoring the phase composition of the silicon nitride obtained as final product.
引用
收藏
页码:1447 / 1452
页数:6
相关论文
共 22 条
[1]  
ARTL G, 1990, FERROELECTRICS, V104, P217
[2]   OBTAINING A DIVIDED URANIUM OXIDE FROM THE THERMOLYSIS OF UO2(NO3)2.6H2O - OUTSTANDING ROLE OF THE RESIDUAL PRESSURE [J].
BORDERE, S ;
FLOREANCIG, A ;
ROUQUEROL, F ;
ROUQUEROL, J .
SOLID STATE IONICS, 1993, 63-5 :229-235
[3]   Multiple features of a porous structure as assessed from the hysteresis of nitrogen adsorption-desorption:: Case study of the formation of UO3 from UO2(NO3)2•6H2O [J].
Bordere, S ;
Llewellyn, PL ;
Rouquerol, F ;
Rouquerol, J .
LANGMUIR, 1998, 14 (15) :4217-4221
[4]   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
[5]  
Bowden ME, 1998, J AM CERAM SOC, V81, P2188, DOI 10.1111/j.1151-2916.1998.tb02605.x
[6]   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
[7]   CORRELATION BETWEEN THE SHAPE OF CONTROLLED-RATE THERMAL-ANALYSIS CURVES AND THE KINETICS OF SOLID-STATE REACTIONS [J].
CRIADO, JM ;
ORTEGA, A ;
GOTOR, F .
THERMOCHIMICA ACTA, 1990, 157 (01) :171-179
[8]   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
[9]  
DSURHAM SJP, 1991, J AM CERAM SOC, V74, P31
[10]  
Gotor FJ, 1998, INT J CHEM KINET, V30, P647, DOI 10.1002/(SICI)1097-4601(1998)30:9<647::AID-KIN6>3.3.CO