Compositions: ceramic – Ceramic compositions – Synthetic precious stones
Patent
1996-10-30
1998-03-03
Group, Karl
Compositions: ceramic
Ceramic compositions
Synthetic precious stones
501 88, 63 32, 117951, C30B 2936, C04B 35565
Patent
active
057233918
ABSTRACT:
Synthetic gemstones having extraordinary brilliance and hardness are formed from large single crystals of relatively low impurity, translucent silicon carbide of a single polytype that are grown in a furnace sublimation system. The crystals are cut into rough gemstones that are thereafter fashioned into finished gemstones. A wide range of colors and shades is available by selective doping of the crystal during growth. A colorless gemstone is produced by growing the crystal undoped in a system substantially free of unwanted impurity atoms.
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Hunter Charles Eric
Verbiest Dirk
C3, Inc.
Faust Richard S.
Group Karl
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