EP0045359A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Sealing glass composition
Assignee: International Business Machines Corp
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Filing: 1981-06-03
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Granted: —
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Expires: 2001-06-03
Abstract
Abstract A non-crystallizing sealing glass composition comprising a mixture of glass material and a filler material, which does not contain alkaline oxides or more than 1.5% by weight of silica, the glass material consisting essentially of 75.49% to 84% by weight of PbO, 11.2% to 14.25% by weight of B 2 0 3 , up to 1.0% by weight of Sn0 2 , up to 1.5% by weight of Ge0 2 , and at least 2% by weight of an additional component, which comprises up to 3.1% by weight of ZnO and/or up to 9.4% by weight of Bi 2 O 3 , and the filler material comprises 13.5% to 17% by weight of the mixture of β-eucryptite, having a maximum particle size less than 100 µm.
Inventors
- 👤 Robert A. Rita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 20:04
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/24; C03C8/245; C03C3/00; C03C3/12; C03C3/14; C03C3/142
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
123 words
] A non-crystallizing sealing glass composition comprising a mixture of glass material and a filler material, which does not contain alkaline oxides or more than 1.5% by weight of silica, the glass material consisting essentially of 75.49% to 84% by weight of PbO, 11.2% to 14.25% by weight of B203, up to 1.0% by weight of Sn0 2 , up to 1.51% by weight of GeO 2 , and at least 2% by weight of an additional component, which comprises up to 3.1% by weight of ZnO and/or up to 9.4% by weight of Bi 2 0 3 , and the filler material comprises 13.5% to 17% by weight of the mixture of r-eucryptite, having a maximum particle size less than 100 µm.
Claim 2
Dependent Claim
23 words
2 A composition according to claim 1, in which the f-eucryptite is present in an amount from 14.5% to 16.5 % by weight.
Claim 3
Dependent Claim
20 words
3 A composition according to claim 1, in which the f-eucryptite particles have a maximum particle size of 30 microns.
Claim 4
Dependent Claim
22 words
4 A composition according to claim 3 in which approximately 90% of the β-eucryptite has a maximum particle size of 15 microns.
Claim 5
Dependent Claim
23 words
5 A composition according to claim 3, in which at least 90% of the f-eucryptite has a maximum particle size of 10 microns.
Claim 6
Dependent Claim
22 words
6 A composition according to any preceding claim, in which ZnO is present in an amount of 1.8% to 2.9% by weight.
Claim 7
Dependent Claim
25 words
7 A composition according to any preceding claim, in which Bi 2 0 3 is present in an amount from 2.6% to 9.4% by weight.
Claim 8
Dependent Claim
39 words
8 A method of forming a seal on a glass work piece, comprising applying a non-crystallizing sealing glass composition according to any preceding claim to the work piece, and thermally fusing the composition at a temperature of about 425°C.
Claim 9
Dependent Claim
18 words
9 A method according to claim 8, in which the glass work piece is a gas display panel.
Claim 10
Dependent Claim
13 words
10 A gas display panel made by a method according to claim 9.
References Cited (Backward Citations)
US4186023A
Cited
DE3002353A1
Cited
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