Change in the phase composition of corundum-mullite-cordierite refractories under heat treatment

An analysis of the change in the phase composition of corundum-mullite-cordierite refractories cooled according to various procedures after heat treatment for 2 h at temperatures of 1673, 1723, and 1773 K, which correspond to the subsolidus region of the diagram of MgO−Al2O3−SiO2 with different comb...

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Bibliographic Details
Published in:Refractories and industrial ceramics 1997-10, Vol.38 (9-10), p.383-387
Main Authors: LOGVINKOV, S. M, SEMCHENKO, G. D, KOBYZEVA, D. A
Format: Article
Language:English
Subjects:
Aluminum oxide
Applied sciences
Building materials. Ceramics. Glasses
Ceramics
Chemical industry and chemicals
Cordierite
Corundum
Deviation
Exact sciences and technology
Heat treatment
Magnesium oxide
Mullite
Phase composition
Phase diagrams
Phase transformations
Refractories
Refractory products
Silicon dioxide
Solid phases
Special refractories
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Summary:An analysis of the change in the phase composition of corundum-mullite-cordierite refractories cooled according to various procedures after heat treatment for 2 h at temperatures of 1673, 1723, and 1773 K, which correspond to the subsolidus region of the diagram of MgO−Al2O3−SiO2 with different combinations of coexisting phases. The possibility of transforming the phase composition of such materials by reversible solid-phase reactions is shown. The reasons for and distinctive features of the deviations of the actual phase composition from the theoretical one are considered. Theoretical and experimental data on the high-alumina region of the phase diagram of MgO−Al2O3−SiO2 are generalized.
ISSN:1083-4877
1573-9139
DOI:10.1007/BF02767899