The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 1992
Filed:
Aug. 12, 1991
Arnulf Muan, Lacey Spring, VA (US);
Mitri S Najjar, Wappingers Falls, NY (US);
Texaco Inc., White Plains, NY (US);
Abstract
Vanadium garnet materials and a method for their preparation. The vanadium garnet material has a trivalent vanadium cation and a composition that falls within a specific prismatic-shaped volume in a quaternary composition diagram of MnO, CaO, V.sub.2 O.sub.3, and SiO.sub.2. In the process, specific amounts of separately pre-heated V.sub.2 O.sub.3, MnO, CaO and SiO.sub.2 powders are ground and mixed together, pelletized, heated at a temperature in the range of about 1100.degree. C. to 1400.degree. C. for 12 to 48 hours in an atmosphere of carefully selected oxygen pressure comprising a gas mixture of high purity CO.sub.2 and H.sub.2 to produce a liquid melt, and cooling, crystallizing out and separating said vanadium garnet material. A typical vanadium garnet material has the formula Mn.sub.1.3 Ca.sub.1.7 V.sub.2 Si.sub.3 O.sub.12. The vanadium garnet materials may be used in laser applications.