Accession Number : ADB037847

Title :   Purification of Optical-Coating Materials.

Descriptive Note : Final technical rept. 1 Jun 77-31 Jan 79,

Corporate Author : HUGHES RESEARCH LABS MALIBU CA

Personal Author(s) : Pastor, Ricardo C. ; Harrington, James A.

Report Date : JAN 1979

Pagination or Media Count : 47

Abstract : A study of the synthesis and purification of six new optical-coating materials (LaF3, CeF3, PrF3, BiF3, KGaF4, and BiI3) was made using various reactive atmospheres. Congruent melting was encountered in LaF3, CeF3, PrF3, and BiI3. The results of thermal characterization of BiF3 were inconclusive due to the sensitivity of the material to decomposition. Congruent sublimation was shown in the two-component material, KGaF4. Just below melting, this material shows an endotherm which has been attributed to a solid-solid transition.

Descriptors :   *OPTICAL COATINGS, *INFRARED OPTICAL MATERIALS, *LASER MATERIALS, SYNTHESIS(CHEMISTRY), PURIFICATION, CRYSTAL GROWTH, COMPACTING, FLUORIDES, RARE EARTH COMPOUNDS, IODIDES, THIN FILMS, MELTING, THERMAL PROPERTIES, SUBLIMATION.

Subject Categories : Lasers and Masers
      Coatings, Colorants and Finishes
      Infrared Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE