| The Effect of Raw Material Purity and Reactive
Atmosphere on the Properties of
Fluorozirconate Glasses |
PATRICK F. MALONE,* ARUN K. VARSHNEYA AND ANTHONY V. LONGOBARDO**
Pages : 91-97
DOI : 10.1080/0371750X.1990.10823002 |
| Abstract |
| The effect of starting material purity and reactive atmosphere on six
ftuorozirconate glass compositions was examined. Compositions made
with low purity starting materials showed a high degree of surface
crystallization with absorption bands, tails, or shoulders present in
the UV-Vis spectra. A shoulder located off theIR cutoff was also
present in all low purity glass compositions. The high purity compositions
exhibited sharp UV and IR cutoffs at ,...., 210 nm (47,600 em-•)
and 7575 nm (1320 cm-1), respectively. T g and Tx values were determined
for each composition using a DSC. There appeared to be no
correlation between material purity and the value of glass formability
index (Tx- Tg). |
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