KINETIC MODELLING FOR THERMAL DECOMPOSITION OF THE ALUMINUM HYDROXIDE DRIED, MILLED AND CLASSIFIED

被引：0
作者：
Isopescu, Raluca [1 ]
Dobra, Gheorghe [2 ]
Iliev, Sorin [2 ]
Cotet, Lucian [2 ]
Boiangiu, Alina [2 ]
Filipescu, Laurentiu [1 ]
机构：
[1] Univ Politehn Bucuresti, Fac Appl Chem & Mat Sci, Bucharest, Romania
[2] ALUM Tulcea SA, Tulcea, Romania
来源：
UNIVERSITY POLITEHNICA OF BUCHAREST SCIENTIFIC BULLETIN SERIES B-CHEMISTRY AND MATERIALS SCIENCE | 2022年 / 84卷 / 02期
关键词：
gibbsite; thermal transformation; DSC; kinetic modelling; MECHANICALLY INDUCED REACTIVITY; PARTICLE-SIZE; PHASE-CHANGE; GIBBSITE; TRANSFORMATION; TEMPERATURE; AL(OH)(3); OXIDE; CRYSTALLIZATION; CRYSTALLINITY;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The paper presents a kinetic study based on Avrami semiempirical model for the thermal decomposition of the aluminum hydroxide in the range 100-400 degrees C. From experimental evidence concerning TG and DSC measurements, different pathways for the solid phase transformations of the gibbsite during heating were assumed for samples with specific particle size ranges. The modelling results stand for the existence of two distinct mechanisms that overlap. The formation of intermediate metastable phases is more likely to take place in samples with large particle sizes, while small particles undergo a rapid and straightforward transformation.
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页码：67 / 78
页数：12
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