US4755491A
Expired / Lapsed
US
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Manufacturing method for an aluminum nitride sintered body
Assignee: Taiheiyo Cement Corp
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Filing: 1987-02-09
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Granted: 1988-07-05
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Expires: 2007-02-09
Abstract
Abstract A manufacturing method for an aluminum nitride sintered body comprises admixing an additive selected from calcium cyanamide, calcium cyanide, and mixtures thereof with aluminum nitride powder, forming the mixture into a formed body, and sintering the formed body in a non-oxidizing atmosphere. The resulting aluminum nitride sintered body has a high thermal conductivity.
Inventors
- 👤 Sachihiko Miwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:35
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/581
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
49 words
A method for manufacturing an aluminum nitride sintered body consisting essentially of: admixing an additive selected from calcium cyanamide, calcium cyanide, and mixtures thereof with aluminum nitride powder; forming the resulting mixture to obtain a formed body; and sintering said formed body in a non-oxidizing atmosphere at normal pressure.
Claim 2
Independent Claim
49 words
A method for manufacturing an aluminum nitride sintered body consisting essentially of: admixing an additive selected from calcium cyanamide, calcium cyanide, and mixtures thereof with aluminum nitride powder; forming the resulting mixture to obtain a formed body; and sintering said formed body in a non-oxidizing atmosphere at normal pressure.
Claim 3
Dependent Claim
28 words
A manufacturing method as claimed in claim 1, wherein 0.1-7 parts by weight of said additive are admixed per 100 parts by weight of said aluminum nitride powder.
Claim 4
Dependent Claim
28 words
A manufacturing method as claimed in claim 1, wherein 0.5-4 parts by weight of said additive are admixed per 100 parts by weight of said aluminum nitride powder.
References Cited (Backward Citations)
US3577245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |