Ghosh, A and Das, S K and Biswas, J R and Tripathi, Himansu Shekhar and Banerjee, Goutam (2000) The effect of ZnO addition on the densification and properties of magnesium aluminate spinel. Ceramics International, 26 (6). pp. 605-608. ISSN 0272-8842

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Abstract

Stoichiometric magnesium aluminate spinel can be developed by solid oxide reactions of calcined magnesia and calcined alumina. The raw materials were mixed; attrition milled, compacted under a uniaxial pressure of 100 MPa and finally fired in the temperature range of 1500 to 1650 degrees C. Up to 2 wt% ZnO was incorporated as an additive. In this investigation the effect of ZnO on the densification and properties of the magnesium aluminate spinel has been studied. It was found that 99% of theoretical density was achieved on firing at 1550 degrees C with the addition of 0.5 wt% ZnO. The optimum properties in terms of bulk density, hot strength and thermal shock resistance was obtained with 1 wt% ZnO. All the ZnO containing samples retained their strength up to 6-8th cycle on thermal shock. ZnO containing samples are comparatively more resistant to thermal shook than ZnO free samples.

Item Type:	Article
Uncontrolled Keywords:	Thermal shock resistance; Spinel; Densification
Subjects:	Refractories
Divisions:	Refractory
Depositing User:	Mrs Chandana Patra
Date Deposited:	09 Feb 2012 12:22
Last Modified:	16 Mar 2012 06:02
URI:	http://cgcri.csircentral.net/id/eprint/744

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