Reactivity of aluminum sulfate and silica in molten alkali-metal sulfates in order to prepare mullite

被引：21

作者：

El Ouatib, R

Guillemet, S

Durand, B

Samdi, A

Rakho, LE

Moussa, R

机构：

[1] Univ Toulouse 3, UMR 5085, Lab Chim Mat Inorgan & Energet, Ctr Interuniv Rech & Ingn Mat, F-31062 Toulouse 04, France

[2] Univ Hassan II, Fac Sci Ain Chock, EMPM, UFR Physicochim Mat, Casablanca, Morocco

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2005年 / 25卷 / 01期

关键词：

mullite; molten salts; sulfates; synthesis;

D O I：

10.1016/j.jeurceramsoc.2003.12.002

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

With the aim of preparing mullite, reactions between aluminum sulfate and silica in appropriate proportions and molten sulfate media M2SO4 (M = Na and/or K) were performed at different temperatures. The powders obtained were characterized by XRD, FT-IR, SEM and TEM. The reactivity was the same in Na2SO4 and (K,Na)(2)SO4 media. The best results in terms of yield (98.3%) and weight of mullite produced (95%) were obtained in Na2SO4 at 950degreesC. The mullite phase exhibits an acicular morphology (75 x 0.75 mum) and a specific surface area close to 20 m(2)/g. In K2SO4 medium, a potassium alumino silicate is formed as well as mullite. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：73 / 80

页数：8

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