US3897624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for bonding ceramics with metal
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1970-03-30
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Granted: 1975-08-05
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Expires: 1990-03-30
Abstract
Abstract A paste composed of glass having a low fusion point and metal powder is fired on a ceramic material to form a very thin metallic film thereon. A metal body of easily deformable shape is then sandwitched between this film and the metal material to which the ceramic material is to be bonded and the contact points on either side are bonded to the respective materials by firing. The bonded ceramic-metal body so formed is stable in it''s mechanical, heat and electrical properties and is especially adaptable for use as the oxide electrode in MHD power generation.
Inventors
- 👤 Yoshiteru Hamano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:32
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C04B2237/00; C04B2237/02; C04B2237/10; C04B2237/12; C04B2237/124; C04B2237/125; C04B2237/50; C04B2237/59; C04B2237/592; C04B2237/64; C04B2237/70; C04B2237/708; C04B2237/72; C04B2237/76
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
A METHOD FOR BONDING CERAMIC MATERIAL WITH METAL MATERIAL COMPRISING THE STEPS OF FORMING A THIN METALLIC FILM ON THE SURFACE OF A CERAMIC MATERIAL, INSERTING AT LEAST ONE METAL BODY DEFORMABLY SHAPED BETWEEN SAID METALLIC FILM ON THE CERAMIC MATERIAL AND A METAL MATERIAL TO BE BONDED THEREWITH, AND BONDING A PLURALITY OF SPACED CONTACT POINTS ON EITHER SIDE OF SAID METAL BODY TO THE RESPECTIVE MATERIALS BY FIRING WHEREIN SAID AT LEAST ONE METAL BODY IS SHAPED AS A COIL HAVING A PLURALITY OF CRESTS WHICH CONSTITUTE SAID CONTACT POINTS.
Claim 2
Independent Claim
92 words
A METHOD FOR BONDING CERAMIC MATERIAL WITH METAL MATERIAL COMPRISING THE STEPS OF FORMING A THIN METALLIC FILM ON THE SURFACE OF A CERAMIC MATERIAL, INSERTING AT LEAST ONE METAL BODY DEFORMABLY SHAPED BETWEEN SAID METALLIC FILM ON THE CERAMIC MATERIAL AND A METAL MATERIAL TO BE BONDED THEREWITH, AND BONDING A PLURALITY OF SPACED CONTACT POINTS ON EITHER SIDE OF SAID METAL BODY TO THE RESPECTIVE MATERIALS BY FIRING WHEREIN SAID AT LEAST ONE METAL BODY IS SHAPED AS A COIL HAVING A PLURALITY OF CRESTS WHICH CONSTITUTE SAID CONTACT POINTS.
Claim 3
Dependent Claim
46 words
The method as set forth in claim 1, wherein said metallic film is formed by firing a paste composed of glass powder having a low fusion point and at least one metal powder selected from silver, copper, chrominum and nickel on a ceramic material at 700*-1,400*C.
Claim 4
Dependent Claim
30 words
The method as set forth in claim 1, wherein said easily deformable metal is a metal selected from the group consisting of silver, stainless steel, nichrome, Inconel and silver-nickel alloy.
Claim 5
Dependent Claim
28 words
The method, as set forth in claim 1, wherein said at least one metal body is shaped undulatingly defining a plurality of crests which constitute said contact points.
Claim 6
Independent Claim
113 words
A method, for bonding ceramic material with metal material comprising the steps of forming a thin metallic film on the surface of a ceramic material, inserting a metal body of readily deformable shape between said metallic film on the ceramic material and a metal material to be bonded therewith, and bonding a plurality of contact points on either side of said metal body by firing such that the contact points of said metal body are bonded, respectively, to said metallic film on said ceramic material and said metal material, to ensure electrical conductivity therebetween wherein said metal body is shaped as a coil having a plurality of crests which constitute said contact points.
Claim 7
Independent Claim
113 words
A method, for bonding ceramic material with metal material comprising the steps of forming a thin metallic film on the surface of a ceramic material, inserting a metal body of readily deformable shape between said metallic film on the ceramic material and a metal material to be bonded therewith, and bonding a plurality of contact points on either side of said metal body by firing such that the contact points of said metal body are bonded, respectively, to said metallic film on said ceramic material and said metal material, to ensure electrical conductivity therebetween wherein said metal body is shaped as a coil having a plurality of crests which constitute said contact points.
Claim 8
Dependent Claim
47 words
The method, as set forth in claim 5, wherein said bonding step includes, exposing the surface of said metallic film on said ceramic material to a temperature of about 2,500*C, and cooling said metal material to a temperature of less than 100*C to produce said electrical conductivity.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |