Formation and Densification Behavior of MgAl^sub 2^O^sub 4^ Spinel: The Influence of Processing Parameters

Different types of dense stoichiometric and nonstoichiometric magnesium aluminate (...) spinel (MAS) ceramics were prepared following a conventional double-stage firing process using different commercially available alumina and magnesia raw materials. Stoichiometric, magnesia-rich, and alumina-rich...

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Bibliographic Details
Published in:	Journal of the American Ceramic Society Vol. 91; no. 6; p. 1905
Main Authors:	Ganesh, Ibram, Olhero, Susana M, Rebelo, Avito H, Ferreira, J M F
Format:	Journal Article
Language:	English
Published:	Columbus Wiley Subscription Services, Inc 01-06-2008
Subjects:	Ceramic sintering Ceramics Materials science Porosity
Online Access:	Get full text
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Summary:	Different types of dense stoichiometric and nonstoichiometric magnesium aluminate (...) spinel (MAS) ceramics were prepared following a conventional double-stage firing process using different commercially available alumina and magnesia raw materials. Stoichiometric, magnesia-rich, and alumina-rich spinels were sintered at 1500...-1800...C for 1-2.5 h. The influence of the different processing parameters (average particle size, degree of spinel phase, green density, mass of the powder compact, sintering temperature, holding time at the peak temperature, and starting composition) on the densification behavior of MAS was assessed by measuring the bulk density, apparent porosity, and water absorption capacity, and microstructural observations. Most of the MAS compositions tested exhibited excellent sintering properties. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:	0002-7820 1551-2916