Patent ID: 8658083

Claim:
A method of making spinel-germanate glass composite comprising: melting a germanate glass in a crucible in the temperature range of about 1300° C.-1350° C.; powdering and sieving the germanate glass through 325 and 400 size mesh; collecting the germanate glass powders in the range of 37-44 μm; sintering a spinel powder to form spinel powders; powdering and sieving the spinel powders through 325 and 400 size mesh; collecting the spinel powders of particle size about 37-44 μm; mixing the germanate glass powders and the spinel powders so that the resulting mixed powders contain 0.0001 to 40% volume fraction of the spinel powders; loading the mixed powders in a die; hot pressing the mixed powders in the die in the temperature range of about 650° C. to 800° C. and pressure in the range of about 1,000 to 10,000 psi for about 30 minutes to about 6 hours; and cooling the mixed powders to form a spinel-germanate glass composite.