US4719188A
Expired / Lapsed
US
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Alumina-base abrasion resistant material
Assignee: Mitsui Mining Co Ltd
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Filing: 1986-08-08
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Granted: 1988-01-12
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Expires: 2006-08-08
Abstract
Abstract Disclosed herein is an alumina-base abrasion resistant material obtained by adding, as sintering agents, 0.5-4.0 parts by weight of each of TiO 2 and CuO and 0.5-4.0 parts by weight of each of 3 or 4 oxides selected from the group consisting of Fe 2 O 3 , MnO 2 , ZrO 2 and SiO 2 to 100 parts of Al 2 O 3 powder and then sintering the resultant raw batch.
Inventors
- 👤 Keiichiro Koba
- 👤 Akira Matsumoto
- 👤 Yoshito Morita
- 👤 Tomomi Miyamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:34
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/111; C04B35/1115
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
59 words
An alumina-base abrasion resistant material comprising a sintered product of 100 parts by weight of Al 2 O 3 powder and an admixure of sintering agents consisting essentially of 0.5-4.0 parts by weight of each of TiO 2 a CuO, of Fe 2 O 3 , MnO 2 and SiO 2 , said sintering being conducted at 1,200°-1,350° C.
Claim 2
Dependent Claim
59 words
An alumina-base abrasion resistant material comprising a sintered product of 100 parts by weight of Al 2 O 3 powder and an admixure of sintering agents consisting essentially of 0.5-4.0 parts by weight of each of TiO 2 a CuO, of Fe 2 O 3 , MnO 2 and SiO 2 , said sintering being conducted at 1,200°-1,350° C.
Claim 3
Independent Claim
85 words
A method of preparing an alumina-base abrasion resistant material sinterable at 1,200°-1,350° C. which comprises adding to 100 parts by weight of Al 2 O 3 powder as sintering agents an admixture consisting essentially of 0.5-4.0 parts by weight of each of TiO 2 a CuO, Fe 2 O 3 , MnO 2 and SiO 2 , and optionally a binder, forming into a shape conforming with its end use by a suitable conventional forming method, and sintering the resultant raw batch at 1,200°-1,350° C.
Claim 4
Independent Claim
85 words
A method of preparing an alumina-base abrasion resistant material sinterable at 1,200°-1,350° C. which comprises adding to 100 parts by weight of Al 2 O 3 powder as sintering agents an admixture consisting essentially of 0.5-4.0 parts by weight of each of TiO 2 a CuO, Fe 2 O 3 , MnO 2 and SiO 2 , and optionally a binder, forming into a shape conforming with its end use by a suitable conventional forming method, and sintering the resultant raw batch at 1,200°-1,350° C.
References Cited (Backward Citations)
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US3247000A
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US3454385A
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US4139394A
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JPS53126008A
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JPS58130157A
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JPS6021861A
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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) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |