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Magnesium aluminate transparent ceramic having low scattering and absorption loss

Patent image
NRL

A ceramic having at least about 90% by weight magnesium aluminate and having a bulk scattering and absorption loss of less than about 1/cm at any wavelength in a range of about 0.23 to about 5.3 microns or 0.2/cm at any wavelength in a range of about 0.27 to about 4.5 microns. A method of making a ceramic by providing a plurality of particles having a magnesium aluminate core and a fluoride salt coating; heating the particles in an oxidizing atmosphere to a temperature in the range of about 400° C. to about 750° C.; and sintering the particles to form a solid ceramic.

Inventors: 
Villalobos, Guillermo R.; Sanghera, Jasbinder S.; Bayya, Shyam S.; Aggarwal, Ishwar D.
Patent Number: 
Technical domain: 
Materials and Coatings
FIle Date: 
2009-04-06
Grant Date: 
2011-01-25
Grant time: 
659 days
Grant time percentile rank: 
12
Claim count percentile rank: 
2
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY