Synthesis and densification of magnesium aluminate spinel: effect of MgO reactivity

被引：57

作者：

Tripathi, HS

Mukherjee, B

Das, S

Haldar, MK

Das, SK

Ghosh, A

机构：

[1] Cent Glass & Ceram Res Inst, Refractories Div, Kolkata 700032, W Bengal, India

[2] CGCRI, Xray Div, Kolkata, India

来源：

CERAMICS INTERNATIONAL | 2003年 / 29卷 / 08期

关键词：

grain growth; thermal expansion; spinels; refractories;

D O I：

10.1016/S0272-8842(03)00036-1

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：

Stoichiometric magnesium aluminate spinel was synthesized by reaction sintering of alumina with caustic and sintered magnesia. The volume expansion of 5-7% during MgAl2O4 formation was utilized to identify the starting temperature of spinel formation and densification by high temperature dilatometry. The magnesia reactivity was determined by measurement of crystallite size and specific surface area. Caustic magnesia and sintered magnesia behave differently vis-A-vis phase formation and densification of spinel. Densification of stoichiometric Mag-Al spinel was carried out between 1650 and 1750 degreesC. Attempts were made to correlate the MgO reactivity with microstructure and densification of spinel. (C) 2003 Elsevier Ltd and Techna S.r.l. All rights reserved.

引用

页码：915 / 918

页数：4

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