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Spinel solid solutions in the systems MgAl2O4–ZnAl2O4 and MgAl2O4–Mg2TiO4

Published online by Cambridge University Press:  31 January 2011

M. A. Petrova ,
G. A. Mikirticheva ,
A. S. Novikova  and
V. F. Popova
M. A. Petrova
Affiliation:
Institute of Silicate Chemistry of the Russian Academy of Sciences, 199155, St. Petersburg, Russia
G. A. Mikirticheva
Affiliation:
Institute of Silicate Chemistry of the Russian Academy of Sciences, 199155, St. Petersburg, Russia
A. S. Novikova
Affiliation:
Institute of Silicate Chemistry of the Russian Academy of Sciences, 199155, St. Petersburg, Russia
V. F. Popova
Affiliation:
Institute of Silicate Chemistry of the Russian Academy of Sciences, 199155, St. Petersburg, Russia
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Abstract

Phase relations in two binary systems MgAl2O4–ZnAl2O4 and MgAl2O4–Mg2TiO4 have been studied and phase diagrams for them have been constructed. Based on the data of x-ray phase and crystal-optical analyses, the formation of a continuous series of solid solutions with spinel structure between the terminal members of the systems studied has been established. In the MgAl2O4–ZnAl2O4 system the solid solution is stable in the range from room temperature to melting temperature. In the MgAl2O4–Mg2TiO4 system the solid solution decomposes below 1380 °C, yielding the formation of limited regions of homogeneity on the basis of MgAlM2O4 and Mg2+2δ Ti1–δO4. Decomposition of the solid solution is accompanied by crystallization of MgTiO3.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 10 , October 1997 , pp. 2584 - 2588
Copyright
Copyright © Materials Research Society 1997

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References

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