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Patent US4614689A successfully refreshed from Google Patents.
US4614689A
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Non-oxide-series-sintered ceramic body and method for forming conducting film on the surface of non-oxide-series-sintered ceramic body
Assignee: Toshiba Corp
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Filing: 1984-04-24
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Granted: 1986-09-30
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Expires: 2004-04-24
Abstract
Abstract A non-oxide-series-sintered ceramic body, which has a conductive film on its surface and which permits a strong bond to a metal member, the conductive film comprising a metal silicide selected from the group consisting of molybdenum silicide and tungsten silicide.
Inventors
- 👤 Kazuo Ikeda
- 👤 Akio Sayano
- 👤 Shun-ichiro Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:31
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5053; C04B41/5062; C04B41/5071; C04B41/80; C04B41/81; C04B41/85; C04B41/87; C04B2111/00; C04B2111/90; C04B2111/94; Y; Y10; Y10T; Y10T428/00; Y10T428/31
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
98 words
A non-oxide-series-sintered ceramic body containing silicon and nitrogen, which has a conductive film on its surface, the conductive film comprising (a) a metal silicide selected from the group consisting of molybdenum silicide and tungsten silicide and (b) a nitride of a Group IVA transition metal, said metal silicide being a reaction product of silicon contained in the ceramic body with a metal compound selected from the group consisting of metal molybdate and tungsten silicide, and said nitride being a reaction product of nitrogen contained in the ceramic body with a group IVA transition metal or a compound thereof.
Claim 2
Dependent Claim
98 words
A non-oxide-series-sintered ceramic body containing silicon and nitrogen, which has a conductive film on its surface, the conductive film comprising (a) a metal silicide selected from the group consisting of molybdenum silicide and tungsten silicide and (b) a nitride of a Group IVA transition metal, said metal silicide being a reaction product of silicon contained in the ceramic body with a metal compound selected from the group consisting of metal molybdate and tungsten silicide, and said nitride being a reaction product of nitrogen contained in the ceramic body with a group IVA transition metal or a compound thereof.
Claim 3
Dependent Claim
23 words
The non-oxide-series-sintered ceramic body according to claim 1 wherein said transition metal is one selected from the group consisting of titanium and zirconium.
Claim 4
Dependent Claim
14 words
The non-oxide-series-sintered ceramic body according to claim 2, wherein said transition metal is titanium.
Claim 5
Dependent Claim
30 words
The non-oxide-series-sintered ceramic body according to claim 3, wherein said metal silicide is molybdenum silicide, and wherein an atomic ratio of Ti/Mo+Ti is more than 0.4 and less than 0.8.
Claim 6
Independent Claim
88 words
A method of forming a conductive film on the surface of a non-oxide-series-sintered ceramic body comprising the steps of (a) coating the surface of a non-oxide-series-sintered ceramic body with a metal compound selected from the group consisting of metal molybdate and metal tungstate, (b) melting the metal compound, and (c) sintering the resultant structure in a reducing atmosphere to form said conductive film on the surface of the ceramic body, said ceramic body containing nitrogen and said metal compound containing a group IVB transition metal or compound thereof.
Claim 7
Independent Claim
88 words
A method of forming a conductive film on the surface of a non-oxide-series-sintered ceramic body comprising the steps of (a) coating the surface of a non-oxide-series-sintered ceramic body with a metal compound selected from the group consisting of metal molybdate and metal tungstate, (b) melting the metal compound, and (c) sintering the resultant structure in a reducing atmosphere to form said conductive film on the surface of the ceramic body, said ceramic body containing nitrogen and said metal compound containing a group IVB transition metal or compound thereof.
Claim 8
Dependent Claim
21 words
The method according to claim 5, wherein said transition metal is one selected from the group consisting of titanium and zirconium.
Claim 9
Dependent Claim
16 words
The method of claim 5, in which said non-oxide-series-sintered ceramic body is a silicon-bearing ceramic body.
Claim 10
Dependent Claim
16 words
The method of claim 7, in which said silicon-bearing ceramic body is silicon nitride or Sialon.
Claim 11
Dependent Claim
28 words
The method of claim 5, in which said metal molybdate is selected from the group consisting of lithium molybdate, potassium molybdate, calcium molybdate, sodium molybdate, and lead molybdate.
Claim 12
Dependent Claim
28 words
The method of claim 5, in which said step (a) is carried out by coating a metal molybdate-containing liquid or paste on the surface of the ceramic body.
Claim 13
Dependent Claim
22 words
The method of claim 5, in which said step (a) is effected by dipping said ceramic body into a metal molybdate liquid.
Claim 14
Dependent Claim
20 words
The method of claim 5, in which said step (c) is effected at a temperature of 1,100° to 1,500° C.
Claim 15
Dependent Claim
29 words
The method according to claim 6, wherein said metal compound is a metal molybdate, and wherein an atomic ratio of Ti/Mo+Ti is more than 0.4 and less than 0.8.
References Cited (Backward Citations)
US2780561A
Cited
US3120453A
Cited
US2993814A
Cited
US3215555A
Cited
US3535154A
Cited
US3713865A
Cited
US3620799A
Cited
US3801363A
Cited
US3808044A
Cited
US4137361A
Cited
US4252862A
Cited
US4522453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-29 | 1990-03-31 | 1990-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-29 | 1994-03-31 | 1994-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-29 | 1998-03-31 | 1998-09-30 | $7700.00 | Window Closed / Lapsed |