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Proceedings Paper

Low-temperature viscosity measurements of infrared transmitting halide glasses
Author(s): Angela B. Seddon; A. V. Cardoso
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Paper Abstract

The verification of a rapid and accurate method of penetration viscometry utilizing a commercial thermal mechanical analyzer with slight modification is described. The viscosity of a National Bureau of Standards Sample Glass No. 711 measured over the range 107 - 1010.7 Pa s showed good agreement with NBS data, with a mean error of 1.2%. The technique was applied to (37AlF3, 12MgF2, 15CaF2, 9SrF2, 12BaF2, 15YF3) and (30.2AlF3, 10.2ZrF4, 3.5MgF2, 20.3CaF2, 13.2SrF2, 10.6BaF2, 8.3YF3, 3.8NaF) (mol %) glasses. No evidence for load-dependent effects was found, and any cessation of penetration was attributable to devitrification during the measurement.

Paper Details

Date Published: 1 August 1991
PDF: 9 pages
Proc. SPIE 1513, Glasses for Optoelectronics II, (1 August 1991); doi: 10.1117/12.46030
Show Author Affiliations
Angela B. Seddon, Univ. of Sheffield (United Kingdom)
A. V. Cardoso, Univ. of Sheffield (United Kingdom)


Published in SPIE Proceedings Vol. 1513:
Glasses for Optoelectronics II
Giancarlo C. Righini, Editor(s)

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