Strengthened glass-ceramic article and method

Details Strengthened glass-ceramic article and method Strengthened glass-ceramic article and method

C - Chemistry, Metallurgy

03

C

261/13, 49/77

C03C 10/12 (2006.01) C03C 10/00 (2006.01)

Patent

CA 1197266

Abstract of the Disclosure The glass-ceramic disclosed is characterized by a lithium aluminosilicate crystal phase having a very low coefficient of thermal expansion and a residual glassy phase of substantial amount and higher coefficient of expansion, usually a boro- silicate or boroaluminosilicate glass. The two phases form a dilatant system wherein the thermal expansion curve changes markedly in character at a transition point in the range of 500-750°C., the crystal phase dominating below that temperature and the glass phase controlling at higher temperatures.

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