US4269641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for adhesion of ceramics
Assignee: National Institute of Advanced Industrial Science and Technology
•
Filing: 1979-10-11
•
Granted: 1981-05-26
•
Expires: 1999-10-11
Abstract
Abstract A method for providing strong adhesion of two ceramic articles to each other or one ceramic article to an article of metallic copper, which method comprises applying, in the former adhesion, a powder mixture of CuS-LaCrO3-SiO2-Cu to the opposed surfaces of the two ceramic articles or, in the latter adhesion, a powder mixture of CuS-LaCrO3-SiO2 to the opposed surfaces of the ceramic article and the article of metallic copper and, thereafter, heating the pair of articles in the air at a temperature of from 1000 DEG to 1200 DEG C.
Inventors
- 👤 Yoshihiro Ebata
- 👤 Yasuo Toibana
- 👤 Tsuneo Uetsuki
- 👤 Saburo Kose
- 👤 Makoto Kinoshita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:07
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/003; C04B37/005; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B2235/00; C04B2235/02; C04B2235/50; C04B2235/54; C04B2235/5409; C04B2235/5418; C04B2235/5436; C04B2235/5445; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/08; C04B2237/09; C04B2237/12; C04B2237/124; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/36; C04B2237/368; C04B2237/50; C04B2237/60; C04B2237/72
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
143 words
A method for the adhesion of a ceramic article to an article of metallic copper, which comprises adding a binder to a powder mixture of CuS--LaCrO 3 --SiO 2 , wherein the proportion of CuS to LaCrO 3 --SiO 2 is in the range of from 80:20 to 90:10 by weight and the proportion of LaCrO 3 to SiO 2 is in the range of from 25:75 to 50:50 by weight, to convert the powder mixture to a paste, coating a surface of the ceramic article with the paste, placing the article of metallic copper in contact with the coated surface of the ceramic article, and heating the pair of articles in the resultant state of fast contact in an oxidizing atmosphere at a temperature in the range of from 1000° to 1200° C. for a period of from 10 to 20 minutes.
Claim 2
Independent Claim
143 words
A method for the adhesion of a ceramic article to an article of metallic copper, which comprises adding a binder to a powder mixture of CuS--LaCrO 3 --SiO 2 , wherein the proportion of CuS to LaCrO 3 --SiO 2 is in the range of from 80:20 to 90:10 by weight and the proportion of LaCrO 3 to SiO 2 is in the range of from 25:75 to 50:50 by weight, to convert the powder mixture to a paste, coating a surface of the ceramic article with the paste, placing the article of metallic copper in contact with the coated surface of the ceramic article, and heating the pair of articles in the resultant state of fast contact in an oxidizing atmosphere at a temperature in the range of from 1000° to 1200° C. for a period of from 10 to 20 minutes.
Claim 3
Dependent Claim
11 words
The method according to claim 1, wherein the binder is balsam.
Claim 4
Dependent Claim
12 words
The method according to claim 1, wherein the oxidizing atmosphere is air.
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) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |