Infrared Transparent Glasses Derived From Hafnium Fluoride

M. Robinson; R. C. Pastor; R. R. Turk; D. P. Devor; M. Braunstein; R. Braunstein

doi:10.1117/12.959902

28 July 1981 Infrared Transparent Glasses Derived From Hafnium Fluoride

M. Robinson, R. C. Pastor, R. R. Turk, D. P. Devor, M. Braunstein, R. Braunstein

Proceedings Volume 0266, Infrared Fibers; (1981) https://doi.org/10.1117/12.959902
Event: 1981 Los Angeles Technical Symposium, 1980, Los Angeles, United States

Abstract

A new family of glasses derived from hafnium fluoride (HfF4), barium fluoride (BaF2), and various rare earth fluorides has been studied. The spectral and thermal properties are given, as well as hardness, rupture strength, and coefficients of expansion. Reactive atmosphere processing (RAP) of the individual components and the molten glass with anhydrous CF4, BF3, HF and CC14 are described. RAP eliminates anionic impurities such as 0H- and 0= which enter the condensed phase through hydrolysis during the melting and mixing stages of preparation. Elimination of these impurities through RAP maximizes IR transparency and mechanical strength. The glasses are resistant to room temperature hydrolysis, are hard and strong, and are continuously transparent from 0.2 μm to 9 μm.

Citation Download Citation

M. Robinson, R. C. Pastor, R. R. Turk, D. P. Devor, M. Braunstein, and R. Braunstein "Infrared Transparent Glasses Derived From Hafnium Fluoride", Proc. SPIE 0266, Infrared Fibers, (28 July 1981); https://doi.org/10.1117/12.959902

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