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Proceedings Paper

Infrared Transparent Glasses Derived From Hafnium Fluoride
Author(s): M. Robinson; R. C. Pastor; R. R. Turk; D. P. Devor; M. Braunstein; R. Braunstein
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Paper 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.

Paper Details

Date Published: 28 July 1981
PDF: 8 pages
Proc. SPIE 0266, Infrared Fibers, (28 July 1981); doi: 10.1117/12.959902
Show Author Affiliations
M. Robinson, Hughes Research Laboratories (United States)
R. C. Pastor, Hughes Research Laboratories (United States)
R. R. Turk, Hughes Research Laboratories (United States)
D. P. Devor, Hughes Research Laboratories (United States)
M. Braunstein, Hughes Research Laboratories (United States)
R. Braunstein, University of California (United States)

Published in SPIE Proceedings Vol. 0266:
Infrared Fibers
Larry G. DeShazer; Charles Kao, Editor(s)

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