KINETIC-ANALYSIS OF THERMAL-DECOMPOSITION REACTIONS .7. EFFECT OF RADIATION AND DOPING ON THE THERMAL-DECOMPOSITION OF BACO3-TIO2 AND SRCO3-TIO2 CRYSTALLINE MIXTURES

被引：6

作者：

BASAHEL, SN ^{[1
]}

DIEFALLAH, EHM ^{[1
]}

机构：

[1] KING ABDULAZIZ UNIV,FAC SCI,DEPT CHEM,JEDDAH,SAUDI ARABIA

来源：

CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE | 1992年 / 70卷 / 03期

关键词：

TITANATES; THERMAL DECOMPOSITION; DOPING; IRRADIATION EFFECTS;

D O I：

10.1139/v92-118

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

DTA-TG techniques were applied to study the thermal decomposition and reactivity in intimately mixed powders of barium or strontium carbonate and titanium dioxide. The results showed that the temperature for the thermal decomposition of BaCO3-TiO2 mixtures precedes the decomposition of pure BaCO3 by about 250-degrees-C, whereas the decomposition of SrCO3-TiO2 mixtures precedes the decomposition of pure SrCO3 by about 60-degrees-C. Kinetic analysis of the isothermal data in view of various solid-state reaction models showed that the reaction is best described by the phase boundary models. The effects of Co-60 gamma-irradiation and of doping the metal oxide with Li+ or Cu2+ ions on the thermal decomposition reactions were investigated.

引用

页码：888 / 893

页数：6

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