US4632846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of glazed ceramic substrate and glazing composition used therefor
Assignee: Kyocera Corp
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Filing: 1985-09-13
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Granted: 1986-12-30
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Expires: 2005-09-13
Abstract
Abstract A paste of a glazing composition is coated on the entire surface of a ceramic substrate having a metallized metal portion, and the paste-coated ceramic substrate is sintered in a reducing atmosphere, and a glazing layer is formed on the entire surface of the metallized metal portion by utilizing the repellency of the melt of the glazing composition to the metallized metal portion. A glazing composition comprising SiO2, B2O3, BaO, Al2O3 and an alkali metal oxide or a glazing composition comprising SiO2, BaO, Al2O3, CaO and MgO or SrO is used. An acrylic resin syrup, especially an isobutyl methacrylate resin syrup, is used as a binder of a coating paste for forming a glazing layer.
Inventors
- 👤 Hiroshi Fujinaka
- 👤 Masami Terasawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:05
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C03; C03C; C03C8/00; C03C8/02; C04B41/45; C04B41/50; C04B41/5022; C04B41/52; C04B41/80; C04B41/81; C04B41/85; C04B41/86; C04B41/89; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12597; Y10T428/12604; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/1284; Y10T428/24; Y10T428/24273; Y10T428/24802; Y10T428/24926
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
A process for the preparation of a glazed ceramic substrate, which comprises coating the entire surface of a ceramic substrate having a metallized metal portion with a paste of a glazing composition having a repellency to the metallized metal portion in the molten state, and sintering the paste-coated surface of the substrate in a reducing atmosphere to melt the glazing composition and cause the molten composition present on the metallized metal portion to migrate to the surface of the ceramic substrate, whereby a glazing layer is formed on the entire surface of the ceramic substrate exclusive of the metallized metal portion.
Claim 2
Dependent Claim
101 words
A process for the preparation of a glazed ceramic substrate, which comprises coating the entire surface of a ceramic substrate having a metallized metal portion with a paste of a glazing composition having a repellency to the metallized metal portion in the molten state, and sintering the paste-coated surface of the substrate in a reducing atmosphere to melt the glazing composition and cause the molten composition present on the metallized metal portion to migrate to the surface of the ceramic substrate, whereby a glazing layer is formed on the entire surface of the ceramic substrate exclusive of the metallized metal portion.
Claim 3
Dependent Claim
36 words
A process according to claim 1, wherein a layer of at least one metal selected from the group consisting of nickel, gold, platinum, palladium and rhodium is formed on the surface of the metallized metal portion.
Claim 4
Dependent Claim
16 words
A process according to claim 1, wherein the reducing atmosphere is a nitrogen atmosphere containing hydrogen.
Claim 5
Dependent Claim
19 words
A process according to claim 1, wherein sintering is carried out at a temperature of 900° to 1400° C.
Claim 6
Dependent Claim
37 words
A process according to claim 1, wherein the paste of the glazing composition is coated on the surface of the ceramic substrate so that a glazing layer having a thickness of 10 to 150 μm is formed.
Claim 7
Dependent Claim
59 words
A process according to claim 1, wherein the glazing composition comprises 60 to 80% by weight of SiO 2 , 10 to 25% by weight of B 2 O 3 , 2 to 10% by weight of BaO, 0.5 to 10% by weight of Al 2 O 3 and 1 to 15% by weight of an alkali metal oxide.
Claim 8
Dependent Claim
61 words
A process according to claim 1, wherein the glazing composition comprises 55 to 75% by weight of SiO 2 , 6 to 20% by weight of BaO, 6 to 12% by weight of Al 2 O 3 , 8 to 20% by weight of CaO and 0.05 to 3% by weight of at least one oxide selected from MgO and SrO.
Claim 9
Dependent Claim
28 words
A process according to claim 1, wherein the glazing composition comprises a powdery glazing composition, a binder and a solvent and the binder is an acrylic resin syrup.
Claim 10
Dependent Claim
17 words
A process according to claim 8, wherein the acrylic resin syrup is an isobutyl methacrylate resin syrup.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |