Synthesis of alumina from high purity alum derived from coal fly ash

被引：57

作者：

Park, HC

Park, YJ

Stevens, R

机构：

[1] Pusan Natl Univ, Dept Mat Sci & Engn, Pusan 609735, South Korea

[2] Univ Bath, Dept Engn & Appl Sci, Bath BA2 7AY, Avon, England

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2004年 / 367卷 / 1-2期

关键词：

alum; coal fly ash; alumina; microwave heating;

D O I：

10.1016/j.msea.2003.09.093

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

High purity alum (>99.9%) has been produced by the reaction of NH4Al(SO4)(2) derived from coal fly ash and ammonia in water at a controlled pH and then followed by the successive crystallization. The influence of heating source (conventional and microwave) on the decomposition of the alum and the characteristics of the resultant alumina was examined by means of XRD, TG/DTA, SEM and a laser scattering technique. The application of microwave heating for decomposition of the alum yielded finer alpha-Al2O3 powders with a higher specific surface area, when compared with conventional heating. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：166 / 170

页数：5

共 12 条

[1]

Chabinsky IJ, 1988, MICROWAVE PROCESSING, V124, P17

[2]

CHOY JH, 1991, J KOREAN CHEM SOC, V45, P422

[3] ALPHA-ALUMINA FORMATION IN ALUM-DERIVED GAMMA-ALUMINA [J].