Magnesium aluminate transparent ceramic having low scattering and absorption loss
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsGuillermo Villalobos, Jasbinder Sanghera, Shyam Bayya, Ishwar Aggarwal
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Abstract
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.
Claims21
A ceramic comprising at least about 90% by weight magnesium aluminate, 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.
A method of making a ceramic comprising:
- providing a plurality of particles comprising 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.
Dependencies are inferred from the claim text.