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. 03, 2009
Filed:
Mar. 24, 2005
Guillermo R. Villalobos, Springfield, VA (US);
Jas S. Sanghera, Ashburn, VA (US);
Shyam S. Bayya, Ashburn, VA (US);
Ishwar D. Aggarwal, Fairfax Station, VA (US);
Guillermo R. Villalobos, Springfield, VA (US);
Jas S. Sanghera, Ashburn, VA (US);
Shyam S. Bayya, Ashburn, VA (US);
Ishwar D. Aggarwal, Fairfax Station, VA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
This invention pertains to product and process. The product is a transparent product of a density in excess 99.5% comprising spinel and having uniform mechanical properties. The process pertains to fabrication of a transparent spinel product comprising the steps of dissolving a sintering aid in water to form a neutral sintering aid solution, adding a suitable additive to the sintering aid solution, applying the sintering aid solution to spinel particles to form a spinel dispersion, sub-dividing or atomizing the spinel dispersion to form droplets comprising one or more spinel particles coated with the final spinel solution, drying the droplets to form dried coated particles comprising one or more spinel particles coated with a dried layer of the sintering aid, and densifying the dried coated particles to form a transparent spinel product having, uniform optical and mechanical properties in absence of grains of exaggerated size.