Low-temperature viscosity measurements of infrared transmitting halide glasses

Angela B. Seddon; A. V. Cardoso

doi:10.1117/12.46030

1 August 1991 Low-temperature viscosity measurements of infrared transmitting halide glasses

Angela B. Seddon, A. V. Cardoso

Proceedings Volume 1513, Glasses for Optoelectronics II; (1991) https://doi.org/10.1117/12.46030
Event: ECO4 (The Hague '91), 1991, The Hague, Netherlands

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.

Citation Download Citation

Angela B. Seddon and A. V. Cardoso "Low-temperature viscosity measurements of infrared transmitting halide glasses", Proc. SPIE 1513, Glasses for Optoelectronics II, (1 August 1991); https://doi.org/10.1117/12.46030

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