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US3620799A
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US
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Method for metallizing a ceramic body
Assignee: RCA Corp
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Filing: 1968-12-26
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Granted: 1971-11-16
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Expires: 1988-12-26
Abstract
Abstract A method for metallizing a ceramic body comprising coating a surface of the ceramic body with a metallizing composition consisting essentially of 10 to 90 weight parts uncoated molybdenum or tungsten metal particles, 4 to 80 weight parts molybdenum or tungsten metal particles which have an adherent coating of nickel, iron, and/or cobalt metal, and 2 to 27 weight parts ceramic sinter powder. The coated ceramic body is then heated in the range of about 1,100* to 1,500* C. in a reducing atmosphere to produce a sintered metal coating on the ceramic body. Then, the metal coating on the ceramic body may be brazed or soldered to a metal body or to another metallized body.
Inventors
- 👤 Max W Hoelscher
- 👤 Paul D Strubhar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:33
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/51; C04B41/5133; C04B41/5138; C04B41/80; C04B41/81; C04B41/85; C04B41/88; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12181
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
28 words
heating said coated cerAmic body in the range of about 1100 to 1500* C. in a reducing atmosphere to produce a sintered metal coating on said ceramic body.
Claim 2
Dependent Claim
21 words
The method defined in claim 1 wherein said ceramic metallizing composition includes also up to 10 weight parts manganese metal particles.
Claim 3
Dependent Claim
23 words
The method defined in claim 1 wherein said uncoated particles are molybdenum metal particles and said coated particles are nickel coated molybdenum particles.
Claim 4
Dependent Claim
14 words
The method defined in claim 1 wherein said ceramic body is a beryllia ceramic.
Claim 5
Dependent Claim
13 words
The method defined in claim 1 wherein said ceramic is an alumina ceramic.
Claim 6
Dependent Claim
43 words
The method defined in claim 1 wherein said reducing atmosphere consists essentially of 10 to 40 weight percent hydrogen and 90 to 60 weight percent of nitrogen, and the dew point of said atmosphere is higher than -25* C. up to +20* C.
Claim 7
Dependent Claim
35 words
The method defined in claim 6 wherein said metallizing composition consists essentially of about: 57 weight parts uncoated molybdenum metal powder 39 weight parts nickel coated molybdenum metal powder and 15 weight parts sinter powder.
Claim 8
Dependent Claim
19 words
The method defined in claim 7 wherein said metallizing composition contains also about 6 weight parts manganese metal powder.
Claim 9
Dependent Claim
25 words
The method defined in claim 8 wherein said ceramic body is a beryllia ceramic and said body is heated at about 1200 to 1300* C.
Claim 10
Dependent Claim
35 words
The method defined in claim 6 wherein said metallizing composition consists essentially of about: 76 weight parts uncoated molybdenum metal powder 19 weight parts nickel coated molybdenum metal powder, and 10 weight parts sinter powder.
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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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |