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Estimation of phase separation rates of PbO–B2O3 melts

Published online by Cambridge University Press:  03 March 2011

S. Inoue ,
K. Wada ,
A. Nukui ,
M. Yamane ,
S. Shibata ,
A. Yasumori ,
T. Yano ,
A. Makishima ,
H. Inoue  and
M. Uo
...Show all authors
S. Inoue
Affiliation:
National Institute for Research in Inorganic Materials, 1-1 Namiki, Tsukuba 305, Japan
K. Wada
Affiliation:
National Institute for Research in Inorganic Materials, 1-1 Namiki, Tsukuba 305, Japan
A. Nukui
Affiliation:
National Institute for Research in Inorganic Materials, 1-1 Namiki, Tsukuba 305, Japan
M. Yamane
Affiliation:
Department of Inorganic Materials, Faculty of Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-Ku, Tokyo 152, Japan
S. Shibata
Affiliation:
Department of Inorganic Materials, Faculty of Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-Ku, Tokyo 152, Japan
A. Yasumori
Affiliation:
Department of Inorganic Materials, Faculty of Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-Ku, Tokyo 152, Japan
T. Yano
Affiliation:
Department of Inorganic Materials, Faculty of Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-Ku, Tokyo 152, Japan
A. Makishima
Affiliation:
Department of Materials Science, Faculty of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo 113, Japan
H. Inoue
Affiliation:
Department of Materials Science, Faculty of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo 113, Japan
M. Uo
Affiliation:
Department of Materials Science, Faculty of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo 113, Japan
Y. Fujimori
Affiliation:
Tsukuba Space Center, National Space Development Agency of Japan, 2-1-1 Sengen, Tsukuba 305, Japan
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Abstract

The rate of liquid-liquid phase separation was experimentally studied in the PbO-B2O3 system. The in situ measurements were made by observing the melts with a videocamera continuously as the melts were cooled down from homogenization temperatures at a rate of 2.5 °C/min. The time interval between the beginning and the completion of the darkening of the visual field was determined as a measure of the separation rate. The phase-separation rate was estimated to be at least 900 times larger than that of the metastable phase separation below the liquidus.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 6 , June 1995 , pp. 1561 - 1564
Copyright
Copyright © Materials Research Society 1995

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References

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