Germanate Glass Ceramic.

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Abstract:

A germanate glass ceramic article which has better thermal and physical properties than the competing materials of zinc sulfide, spinel, and sapphire is made by mixing germanate ceramic glass components melting the components to form a molten mass cooling the molten mass to form a solid glass article nucleating the solid article by heating it in the range of about 630-790 deg C for about 1-16 hours to develop nuclei in the article and crystallizing the nucleated article by heating it, after nucleation, in the range of about 12 minute to about 8 hours to grow the nuclei to crystallites having an average diameter of less then about 1000 nanometer nm and cooling to form the glass ceramic. MM

Author(s):
Jewell, John M. ; Harbison, Barry B. ; Aggarwal, Ishwar D.
Author Organization(s):
DEPARTMENT OF THE NAVY WASHINGTON DC
Descriptive Note:
Patent Application, Filed 23 Dec 94,
Pagination:
0017

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
PAT-APPL-367 074
Monitor Series:
ONR
 Subject Terms
Joint Capability Areas:
JCA_3.2_Engagement; JCA_3_Force Application; JCA_6.1_Information Transport; JCA_6_Net Centric; JCA_3.2.1_Kinetic Means
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*PATENT APPLICATIONS, *GLASS, *CERAMIC MATERIALS, *INFRARED SPECTRA, *GERMANATES, THERMAL PROPERTIES, TOUGHNESS, NUCLEATION, COOLING, FRACTURE(MECHANICS), MELTING, INFRARED DOMES, HARDNESS, EROSION RESISTANCE, INFRARED WINDOWS
Field(s)/Group(s):
Ceramics, Refractories and Glass, Optics
Report Date:
1994 Dec 23