Sealing glass composition and method of making and of using
First Claim
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1. A sealing glass composition comprising a crystalline glass powder and a filler, wherein the composition is comprised of:
- 89 to 98 wt % of a crystalline glass powder consisting of 70 to 87 wt % PbO, 6 to 15 wt % B2 O3, 2 to 12 wt % ZnO, and 0.1 to 5 wt % mixture of SiO2 and Al2 O3, 0 to 3 wt % BaO;
0 to 1 wt % of zircon; and
1 to 10 wt % garnet.
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Abstract
The present invention relates to a novel sealing glass composition, in particular, one which comprises solid PbO--ZnO--B2 O3 glass and natural garnet as a filler component. This composition has the advantage that thermal strain does not occur at the interface between the crystalline glass and filler because of the excellent chemical affinity. This prevents cracks from propagating at the interface between the main glass and filler, thereby improving the mechanical strength of the glass.
14 Citations
3 Claims
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1. A sealing glass composition comprising a crystalline glass powder and a filler, wherein the composition is comprised of:
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89 to 98 wt % of a crystalline glass powder consisting of 70 to 87 wt % PbO, 6 to 15 wt % B2 O3, 2 to 12 wt % ZnO, and 0.1 to 5 wt % mixture of SiO2 and Al2 O3, 0 to 3 wt % BaO; 0 to 1 wt % of zircon; and 1 to 10 wt % garnet. - View Dependent Claims (2)
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3. A method for making a crystalline glass composition comprising:
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(a) melting a glass composition comprising PbO, ZnO, B2 O3, SiO2, Al2 O3, and BaO, (b) forming a molded plate from the melted glass composition, (c) grinding the molded plate to form a glass powder, (d) grinding garnet raw stones to form a filler powder, and (e) adding the filler powder and a zircon nucleating agent to the glass to form a sealing glass composition comprising a crystalline glass powder and a filler, wherein the composition is comprised of;
89 to 98 wt % of a crystalline glass powder consisting of 70 to 87 wt % PbO, 6 to 15 wt % B2 O3, 2 to 12 wt % ZnO, and 0.1 to 5 wt % mixture of SiO2 and Al2 O3, 0 to 3 wt % BaO;
0 to 1 wt % of zircon; and
1 to 10 wt % garnet.
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Specification
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Current AssigneeSamsung Corning Precision Glass Company Limited (Corning Incorporated)
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Original AssigneeSamsung Corning Company Limited (Corning Incorporated)
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InventorsPark, Tae H., Lim, Byung C.
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Primary Examiner(s)Bell, Mark L.
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Assistant Examiner(s)TROILO, LOUIS
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Application NumberUS08/520,985Time in Patent Office634 DaysField of Search501/10, 501/15, 501/32, 501/76US Class Current501/32CPC Class CodesC03C 10/0054 containing PbO, SnO2, B2O3C03C 8/18 containing free metalsC03C 8/245 containing more than 50% le...
