Patent ID: 6465380
Filing Date: 2002-10-15
Classification: C03C,G02B

Abstract:
A glass ceramic article comprised of a negative thermal expansion glass ceramic comprised of 8.5-11.5 wt %Li2O, 34-42 wt %Al2O3, 42-55 wt %SiO2, 3.2-5.0 wt %TiO2, 0-2 wt %B2O3, 0-3 wt %P2O5, wherein the glass-ceramic article has a negative thermal expansion coefficient in the range from âˆ’20Ã—10âˆ’7/Â°C. to âˆ’100Ã—10âˆ’7/Â°C. over the temperature range of âˆ’40Â° C. to +85Â° C.