The Structure of Fusion-Cast High-Chrome Oxide Refractories in the Cr2O3 - MgO - Al2O3 System

The phase composition and structure of fusion-cast refractories composed of 57.0-84.2% Cr2O3, 4.3-36.1% MgO, 2.0-9.7% Al2O3, and 2.4-6.9% SiO2 were studied by petrographic and X-ray spectral microprobe analysis. Refractories high in MgO with modulus M = (Cr2O3 + Al2O3)/MgO = 1.64-3.1 were shown to c...

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Bibliographic Details
Published in:Refractories and industrial ceramics 2005-03, Vol.46 (2), p.127-131
Main Authors: Sokolov, V A, Malysheva, T Ya
Format: Article
Language:English
Subjects:
Corrosion resistance
Mineralogy
Studies
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Summary:The phase composition and structure of fusion-cast refractories composed of 57.0-84.2% Cr2O3, 4.3-36.1% MgO, 2.0-9.7% Al2O3, and 2.4-6.9% SiO2 were studied by petrographic and X-ray spectral microprobe analysis. Refractories high in MgO with modulus M = (Cr2O3 + Al2O3)/MgO = 1.64-3.1 were shown to consist of spinel phase Mg(Cr,Al)2O4 and silicate glass. Refractory materials (80.8-84.2% Cr2O3, 4.3-4.7% MgO, 2.0-9.7% Al2O3, and 2.7-6.9% SiO2 with M = 18.7-20.2) were three-phase systems composed of spinel, escolaite, and glass phase. These materials, owing to their high corrosion resistance, have promising potentiality for practical applications. 7 refs.
ISSN:1083-4877
1573-9139
DOI:10.1007/s11148-005-0067-5