Chemistry of inorganic compounds – Halogen or compound thereof – Binary fluorine containing compound
Patent
1973-08-27
1977-03-22
Stern, Edward
Chemistry of inorganic compounds
Halogen or compound thereof
Binary fluorine containing compound
423263, 423489, 264 1, 264 65, 264332, C01D 302, C01F 1122, C01F 1700, C01F 528
Patent
active
040137961
ABSTRACT:
A hot-pressed optical body is disclosed which is free from absorption bands due to carbon dioxide, water, hydroxyl ion and acid fluorides in the ultraviolet, visible and near-infrared wavelength regions. Typically, the optical body is formed from a powder of an alkaline earth metal fluoride, alkali metal fluoride, or rare earth metal fluoride. One or more absorption bands due to a single impurity may be reduced or eliminated, or bands due to plural impurities may be reduced or eliminated sequentially, or simultaneously. The optical body is made by flowing a reactive, reducing gas, optionally, in combination with hydrogen fluoride gas, directly into the die cavity containing a pressable powder, and either hot-pressing or extruding the powder.
REFERENCES:
patent: 2550173 (1951-04-01), Swinehart et al.
patent: 3114601 (1963-12-01), Letter
patent: 3206279 (1965-09-01), Carnall, Jr.
patent: 3282641 (1966-11-01), Sfiligoj et al.
patent: 3359066 (1967-12-01), Hatch et al.
patent: 3365271 (1968-01-01), Carnall, Jr. et al.
patent: 3408430 (1968-10-01), Lachman
patent: 3565700 (1971-02-01), Root
patent: 3615169 (1971-10-01), Thom
patent: 3649552 (1972-03-01), Robinson et al.
patent: 3816600 (1974-06-01), Huizing
patent: 3920802 (1975-11-01), Moss et al.
The Condensed Chemical Dictionary, 1971, 8th Ed., p. 753, Van Nostrand Reinhold Co., N. Y.
Hackh's Chem. Dictionary, 4th Ed., by J. Grant, 1969 Ed., pp. 571, 572, McGraw-Hill Book Co., N. Y.
McPherson & Henderson Book "A Course in General Chem.," Third Ed., 1927, pp. 573, 574, Ginn & Co., N. Y.
"Periodic Table of the Elements," Sargent-Welch Sc. Co., 1968, Chicago, Ill.
Book "The Rare Earths" by F. H. Spedding & A. H. Daane, 1961, p. 430, John Wiley & Sons, Inc., N. Y.
Book "Fluorine Chemistry," J. H. Simons, vol. 1, 1950 Ed., pp. 25-29, 34-36, 43-46, Academic Press, Inc., Publishers, New York, N. Y.
Packer Herbert
Swinehart Carl F.
Lobo Alfred D.
Stern Edward
The Harshaw Chemical Company
LandOfFree
Hot-pressed ionic fluoride optical bodies free of absorption ban does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hot-pressed ionic fluoride optical bodies free of absorption ban, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hot-pressed ionic fluoride optical bodies free of absorption ban will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1957236