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Crystallization of BaF2–ZnF2–YbF3–ThF4 glass

Published online by Cambridge University Press:  31 January 2011

Roberto Garcia ,
Robert H. Doremus ,
Narottarn P. Bansal ,
Sen-Hou Ko  and
Tracey Margraf
Roberto Garcia
Affiliation:
Materials Engineering Department, Rensselaer Polytechnic Institute, Troy, New York 12180-3590
Robert H. Doremus
Affiliation:
Materials Engineering Department, Rensselaer Polytechnic Institute, Troy, New York 12180-3590
Narottarn P. Bansal
Affiliation:
Materials Engineering Department, Rensselaer Polytechnic Institute, Troy, New York 12180-3590
Sen-Hou Ko
Affiliation:
Materials Engineering Department, Rensselaer Polytechnic Institute, Troy, New York 12180-3590
Tracey Margraf
Affiliation:
Materials Engineering Department, Rensselaer Polytechnic Institute, Troy, New York 12180-3590
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Abstract

The crystallizing phases from a BaZn YbTh fluoride glass were a BaYbTh fluoride, ZnF2, and YbF3, as identified with x-ray diffraction and composition-enhanced scanning electron microscopy. Blocky BaYbTh fluoride crystallizes first, at about 450 °C, and ZnF2 excluded from this phase crystallizes at its surfaces. At higher temperatures the BaYbTh fluoride phase decomposes partially to BaThF6 and YbF3 phases. The kinetics and temperatures of crystallization were also followed with differential scanning calorimetry.

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Type
Articles
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Journal of Materials Research , Volume 3 , Issue 5 , October 1988 , pp. 989 - 995
Copyright
Copyright © Materials Research Society 1988

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References

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