US4510253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum resistant ceramic fiber composition
Assignee: Premier Refractories and Chemicals Inc
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Filing: 1983-05-26
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Granted: 1985-04-09
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Expires: 2003-05-26
Abstract
Abstract A ceramic fiber composition for use in contact with molten aluminum alloys is disclosed which is lightweight and porous. The composition contains ceramic fibers, binders and an additive containing 9Al 2 O 3 .2B 2 O 3 . The additive is preferably aluminum boron slag which is a by-product of the production of ferro-boron.
Inventors
- 👤 Frank T. Felice
- 👤 Celeste B. Yonushonis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:39
CPC Classifications
C; C04; C04B; C04B30/00; C04B30/02; C04B28/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
84 words
A lightweight, porous ceramic fiber composition resistant to wetting and attack by molten aluminum alloys comprising: (a) from 20 to 65 weight % alumina silica ceramic fiber; (b) an additive containing essentially crystalline 9Al 2 O 3 .2B 2 O 3 such that the ceramic fiber composition contains from 1 to 12 weight % 9Al 2 O 3 .2B 2 O 3 ; and (c) the remainder comprising a refractory binder in a quantity at least sufficient to bind said ceramic fiber composition together.
Claim 2
Dependent Claim
84 words
A lightweight, porous ceramic fiber composition resistant to wetting and attack by molten aluminum alloys comprising: (a) from 20 to 65 weight % alumina silica ceramic fiber; (b) an additive containing essentially crystalline 9Al 2 O 3 .2B 2 O 3 such that the ceramic fiber composition contains from 1 to 12 weight % 9Al 2 O 3 .2B 2 O 3 ; and (c) the remainder comprising a refractory binder in a quantity at least sufficient to bind said ceramic fiber composition together.
Claim 3
Dependent Claim
39 words
A ceramic fiber composition as recited in claim 1 wherein said composition is a moldable composition and said binder comprises from 15 to 50 weight % of a colloidal silica dispersion based on the total weight of the composition.
Claim 4
Dependent Claim
20 words
A ceramic fiber composition as recited in claim 2 and further including from 0.4 to 5 weight % polyethylene oxide.
Claim 5
Dependent Claim
22 words
A ceramic fiber composition as recited in claim 2 wherein said colloidal silica dispersion comprises a dispersion containing about 40% colloidal silica.
Claim 6
Dependent Claim
21 words
A ceramic fiber composition as recited in claim 2 and further including a quantity of water to produce the desired consistency.
Claim 7
Dependent Claim
33 words
A ceramic fiber composition as recited in claim 1 wherein said binder is selected from the group consisting of colloidal silica dispersion, aluminum phosphate, alkali metal phosphates, sodium silicate, calcium aluminate and starch.
Claim 8
Dependent Claim
44 words
A ceramic fiber composition as recited in claim 1 for use in the vacuum forming of shapes comprising: (a) from 40 to 60 weight % ceramic fiber; and (b) from 4 to 12 weight % 9Al 2 O 3 .2B 2 O 3 .
Claim 9
Dependent Claim
24 words
A ceramic fiber composition as recited in claim 7 wherein said binder comprises a mixture of a colloidal silica dispersion and a starch solution.
Claim 10
Dependent Claim
16 words
A ceramic fiber composition as recited in claim 1 wherein said additive comprises aluminum boron slag.
Claim 11
Dependent Claim
18 words
A ceramic fiber composition as recited in claim 9 wherein said aluminum boron slag is minus 100 mesh.
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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) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |