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Rapid and Quantitative Determination of Crystallization Tendency of Zinc Tellurite Glass Melt by Using Temperature-Gradient Furnace

Published online by Cambridge University Press:  17 March 2011

Shin-ichi Todoroki ,
Takehisa Matsumoto  and
Satoru Inoue
Shin-ichi Todoroki
Affiliation:
Advanced Materials Laboratory, National Institute for Material Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, JAPAN
Takehisa Matsumoto
Affiliation:
Advanced Materials Laboratory, National Institute for Material Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, JAPAN
Satoru Inoue
Affiliation:
Advanced Materials Laboratory, National Institute for Material Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, JAPAN
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Abstract

Quantitative thermal stability test of glass materials against crystallization is accelerated through a vertical temperature-gradient furnace. In the furnace, zinc tellurite glass melt is sucked into a 75cm-long glass capillary tube (ID 1.5 × OD 8 mmø) and the tube is kept inside to be annealed under a temperature gradient of 300~800°C/50cm. The time to precipitate is determined to make a set of T-T-T (Time-Temperature-Transform) diagrams for different composition and thermal hysteresis. Crystallization is not observed for 65TeO2-35ZnO and 70TeO2-30ZnO (mol%) super-cooled glass melt after 4000s annealing but their stability decreased if the melts were once quenched to below their glass transition temperature before the annealing.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 700: Symposium S – Combinatorial and Artificial Intelligence Methods in Materials Science , 2001 , S6.7
Copyright
Copyright © Materials Research Society 2002

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References

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