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Liquid-Liquid Phase Separation of Melts and Glasses in Ferric Ferrous Oxide-Silica System

Published online by Cambridge University Press:  10 February 2011

A. Yasumori ,
A. Koike ,
Y. Kameshima ,
K. Okada ,
T. Yano ,
M. Yamane  and
S. Inoue
A. Yasumori
Affiliation:
Dept. of Inorganic Mater., Tokyo Institute of Technology, Meguro-ku, Tokyo 152, JAPAN
A. Koike
Affiliation:
Dept. of Inorganic Mater., Tokyo Institute of Technology, Meguro-ku, Tokyo 152, JAPAN
Y. Kameshima
Affiliation:
Dept. of Inorganic Mater., Tokyo Institute of Technology, Meguro-ku, Tokyo 152, JAPAN
K. Okada
Affiliation:
Dept. of Inorganic Mater., Tokyo Institute of Technology, Meguro-ku, Tokyo 152, JAPAN
T. Yano
Affiliation:
Dept. of Inorganic Mater., Tokyo Institute of Technology, Meguro-ku, Tokyo 152, JAPAN
M. Yamane
Affiliation:
Dept. of Inorganic Mater., Tokyo Institute of Technology, Meguro-ku, Tokyo 152, JAPAN
S. Inoue
Affiliation:
National Institute for Research in Inorganic Materials, Namiki, Tsukuba 305, JAPAN
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Abstract

The existence of liquid-liquid miscibility gap in ferric ferrous oxide-silica system has been reported, however, the phase separation phenomena and the derived morphology of the phase separated glasses are uncertain. In this study, the melt-quenched samples of 5 Fe3O4-95 SiO2 and 15 Fe3O4-85 SiO2 (mol%) were prepared by melting at 2300°C or 2200°C (expected to be above miscibility gap), and subsequently at 1800°C or 1750°C (in immiscible region) by use of infrared image furnace and quenching at the rate of ≈102 K/sec. The glassy materials exhibited phase separation having discrete spherical particles or interconnected structure due to the composition, melting temperature and time. Also, the segregation of Fe component occurred during melting, which was caused by the difference of specific gravity of components in the melt.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 455: Symposium T – Glasses and Glass Formers–Current Issues , 1996 , 459
Copyright
Copyright © Materials Research Society 1997

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References

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