Thermal toughening of glass

Details Thermal toughening of glass Thermal toughening of glass

C - Chemistry, Metallurgy

03

B

49/89

C03B 27/04 (2006.01) C03B 27/02 (2006.01) C03B 27/052 (2006.01) C03C 23/00 (2006.01)

Patent

CA 1144763

ABSTRACT Glass is heated to a temperature above its strain point and is thermally toughened by chilling with a quiescent gas-fluidised particulate material which has gas-generating properties and a mean particle size in the range 30 µm to 120 µm, a particle size distribution in the range 1.15 to 2.78, a flowability in the range 69.5 to 92, and a thermal capacity per unit volume at minimum fluidisation in the range 0.7 to 1.59 MJ/m3K. The invention is particularly suitable for thermally toughening glass sheets for vehicle windscreens.

333721

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