Development of ferromagnetic spinels for optical isolation at 10. 6. mu. m. Progress report, December 1, 1977--February 28, 1978
During the period December 1, 1977 to February 28, 1978 emphasis has been placed on preparing pure powders of CdCr/sub 2/Se/sub 4/ and determining the parameters necessary to hot press these into windows with low absorption at 10.6 ..mu..m. Two methods of preparation, namely growth of small single crystals from a liquid phase and the Kodak technique of coprecipitation of hydroxides and subsequent treatment with H/sub 2/Se have yielded samples which have an absorption coefficient of approximately 100 cm/sup -1/ at 10.6 ..mu..m. The samples contain Cr/sub 2/O/sub 3/ as a major impurity. Scattering due to either pores or a second phase also limits transmission. Procedures for removing Cr/sub 2/O/sub 3/ and decreasing porosity are discussed.
- Research Organization:
- Rochester Univ., N.Y. (USA)
- OSTI ID:
- 5071999
- Report Number(s):
- COO-4056-6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360104* -- Metals & Alloys-- Physical Properties
CADMIUM COMPOUNDS
CADMIUM SELENIDES
CHALCOGENIDES
CHROMIUM COMPOUNDS
CHROMIUM SELENIDES
FABRICATION
HOT PRESSING
MATERIALS WORKING
OPACITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
POWDERS
PRESSING
SELENIDES
SELENIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360101 -- Metals & Alloys-- Preparation & Fabrication
360104* -- Metals & Alloys-- Physical Properties
CADMIUM COMPOUNDS
CADMIUM SELENIDES
CHALCOGENIDES
CHROMIUM COMPOUNDS
CHROMIUM SELENIDES
FABRICATION
HOT PRESSING
MATERIALS WORKING
OPACITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
POWDERS
PRESSING
SELENIDES
SELENIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS