Glass frit composition for sealing window glass

Details Glass frit composition for sealing window glass Glass frit composition for sealing window glass

C - Chemistry, Metallurgy

03

B

261/11, 49/82

C03B 29/00 (2006.01) C03C 3/145 (2006.01) C03C 8/24 (2006.01) C03C 10/00 (2006.01) C03C 12/00 (2006.01) C03C 27/00 (2006.01) C03C 27/06 (2006.01)

Patent

CA 1077528

Abstract barium-lithium-alumina-borate glass frit includes the following by weight on an oxide basis: 10-20 (preferably 10.5-16.7% BaO; 10-11% Li2O; 2-7% (preferably 2-3%) A12O3; and 66-77% (preferably 70-77%) B2O3. The frit can be fired, i.e., fused from powdered form to solid sealing glass, at low temperatures, e.g., about 530°C. Firing can take place in an atmosphere which is inert, oxidizing, or reducing. After firing for a sufficient time, e.g., three hours, the sealing glass becomes fully devitrified. The devitrified sealing glass has an expansion coefficient substantially the same as that of window glass, i.e., about 90 X 10-7/°C. The devitrified sealing glass can be reheated to temperatures in excess of 53O°C without deterioration or strains developing in a sealed joint. -1-

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