Patent US4844323A successfully refreshed from Google Patents.
US4844323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for joining ceramics
Assignee: NIHON SINKU GIJUTSU A JAPANESE CORP (50%) KK
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Filing: 1988-02-23
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Granted: 1989-07-04
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Expires: 2008-02-23
Abstract
Abstract A method or joining ceramics comprising the steps: of preparing a ceramics body and another body to be connected with the ceramics body; of interposing a layer of ultra-fine particles having smaller size than the surface roughnesses of the contact surfaces of the ceramics body and the other body, the layer having larger thickness than the surface roughnesses, and the ultra-fine particles being reactive with the ceramics body and the other body and forming a reaction produce which has a strong bonding power to the ceramics body and the other body; and then of pressing and heating the piled composition of the ceramics body, other body and layer.
Inventors
- 👤 Hitoshi Kondo
- 👤 Hiroaki Kawamura
- 👤 Konosuke Inagawa
- 👤 Tetsuya Abe
- 👤 Yoshio Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:56
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32; C; C04; C04B; C04B37/00; C04B37/003; C04B37/006; C04B37/02; C04B37/023; C04B37/026; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/36; C04B2237/365; C04B2237/368; C04B2237/40; C04B2237/405; C04B2237/406; C04B2237/50; C04B2237/70; C04B2237/708
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
A method for joining ceramics comprising the steps: (A) of preparing a ceramics body and other body to be joined with said ceramics body; (B) of interposing a layer of ultra-fine particles having smaller size than the surface roughnesses of the contact surfaces of said ceramics body and said other body, said layer having larger thickness than said surface roughnesses, said ultra-fine particles being reactive for solid-phase diffusion joining with said ceramics body and said other body and forming a reaction product which has a strong bonding power to said ceramics body and said other body; and then (C) of pressing and heating the stacked composition of said ceramics body, other body and layer.
Claim 2
Independent Claim
114 words
A method for joining ceramics comprising the steps: (A) of preparing a ceramics body and other body to be joined with said ceramics body; (B) of interposing a layer of ultra-fine particles having smaller size than the surface roughnesses of the contact surfaces of said ceramics body and said other body, said layer having larger thickness than said surface roughnesses, said ultra-fine particles being reactive for solid-phase diffusion joining with said ceramics body and said other body and forming a reaction product which has a strong bonding power to said ceramics body and said other body; and then (C) of pressing and heating the stacked composition of said ceramics body, other body and layer.
Claim 3
Dependent Claim
15 words
A method according to claim 1, in which said other body is made of ceramics.
Claim 4
Dependent Claim
15 words
A method according to claim 1, in which said other body is made of metal.
Claim 5
Dependent Claim
20 words
A method according to claim 1, in which said ceramics body is made mainly of Al 2 O 3 .
Claim 6
Dependent Claim
16 words
A method according to claim 4, in which said ultra-fine particles are made of Nb (Niobium).
Claim 7
Dependent Claim
21 words
A method according to claim 5, in which a Nb sheet is further interposed between said layer and said other body.
References Cited (Backward Citations)
US3386160A
Cited
US4567110A
Cited
JPS59184778A
Cited
JPS6081071A
Cited
JPS60141681A
Cited
JPS60200872A
Cited
JPS60231471A
Cited
JPS6117475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |