US4277539A
Expired / Lapsed
US
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Refractory articles and composite metal-ceramic articles (cermets) prepared from a silicate-containing aluminum titanate
Assignee: Ceramtec GmbH
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Filing: 1980-05-02
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Granted: 1981-07-07
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Expires: 2000-05-02
Abstract
Abstract Refractory products such as foundry articles and composite metal-ceramic articles are prepared from a sepiolite (2 MgO.3SiO 2 .2H 2 O) and silicate containing aluminum titanate.
Inventors
- 👤 Hartmut Keller
- 👤 Axel Krauth
- 👤 Horst R. Maier
- 👤 Horst Nink
- 👤 Hans J. Pohlmann
- 👤 Horst Reddig
- 👤 Johann Siebels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:23
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/16; B; B22; B22D; B22D19/00; B22D41/00; B22D41/02; B22D41/14; B22D41/16; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/478; C04B35/66; F02; F02B; F02B77/00; F02B77/02; F02F; F02F7/00; F02F7/0085; F02F7/0087; C04B2111/00; C04B2111/00474; C04B2111/0087; C04B2111/00879; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3217; C04B2235/3231; C04B2235/3232; C04B2235/3234; C04B2235/34; C04B2235/3427; C04B2235/3436; C04B2235/3445; C04B2235/70; C04B2235/96; C04B2235/9669; C04B2235/9676; F01N2310/00; F01N2310/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
136 words
An article having a thermal shock coefficient R of 130 to 180 (W/cm), a heat insulation factor λ of 0.01 to 0.03 (W/cm K), a coefficient of expansion AK of ±0.5×10 -6 /°C., an elasticity modulus of approximately 1.4×10 3 (g/mm 2 ) and a transverse strength δ B of about 4.4 (g/mm 2 ) and a crushing strength δ D of about 77 (g/mm 2 ), the article being non-wettable in respect to most NE metals and being alkali-resistant prepared from a silicate-containing aluminum titanate of raw ingredients having a grain size of below 0.6 μm and a chemical composition consisting essentially of from 50 to 60 weight % Al 2 O 3 , 40 to 45 weight % TiO 2 , 2 to 5 weight % kaolinite and 0.1 to 1 weight % sepiolite.
Claim 2
Dependent Claim
136 words
An article having a thermal shock coefficient R of 130 to 180 (W/cm), a heat insulation factor λ of 0.01 to 0.03 (W/cm K), a coefficient of expansion AK of ±0.5×10 -6 /°C., an elasticity modulus of approximately 1.4×10 3 (g/mm 2 ) and a transverse strength δ B of about 4.4 (g/mm 2 ) and a crushing strength δ D of about 77 (g/mm 2 ), the article being non-wettable in respect to most NE metals and being alkali-resistant prepared from a silicate-containing aluminum titanate of raw ingredients having a grain size of below 0.6 μm and a chemical composition consisting essentially of from 50 to 60 weight % Al 2 O 3 , 40 to 45 weight % TiO 2 , 2 to 5 weight % kaolinite and 0.1 to 1 weight % sepiolite.
Claim 3
Dependent Claim
29 words
The article according to claim 1 in the form of thermocouple pocket, gas inlet pipe, closure plug with plate, riser, valve plug, shank, lining for casting or riser inserts.
Claim 4
Dependent Claim
14 words
A composite metal-ceramic article in which the ceramic portion is according to claim 1.
Claim 5
Dependent Claim
126 words
An article having a thermal shock coefficient R of 130 to 180 (W/cm), a heat insulation factor λ of 0.01 to 0.03 (W/cm), a coefficient of expansion AK of ±0.5×10 -6 /°C., an elasticity modulus of approximately 3.5×10 3 (g/mm 2 ) and a transverse strength δ B of about 5.7 (g/mm 2 ) and a crushing strength δ D of about 93.5 (g/mm 2 ), the article being non-wettable in respect of most NE metals and being alkali-resistant prepared from a silicate-containing aluminum titanate of raw ingredients having a grain size of below 0.6 μm and a chemical composition consisting essentially of 53.4 weight % Al 2 O 3 , 42.8 weight % TiO 2 , 3.4 weight % kaolin and 0.4 weight % sepiolite.
Claim 6
Dependent Claim
126 words
An article having a thermal shock coefficient R of 130 to 180 (W/cm), a heat insulation factor λ of 0.01 to 0.03 (W/cm), a coefficient of expansion AK of ±0.5×10 -6 /°C., an elasticity modulus of approximately 3.5×10 3 (g/mm 2 ) and a transverse strength δ B of about 5.7 (g/mm 2 ) and a crushing strength δ D of about 93.5 (g/mm 2 ), the article being non-wettable in respect of most NE metals and being alkali-resistant prepared from a silicate-containing aluminum titanate of raw ingredients having a grain size of below 0.6 μm and a chemical composition consisting essentially of 53.4 weight % Al 2 O 3 , 42.8 weight % TiO 2 , 3.4 weight % kaolin and 0.4 weight % sepiolite.
Claim 7
Dependent Claim
73 words
In the process of preparing a refractory ceramic article which employs an aluminum titanate, the improvement which comprises employing a silicate-containing aluminum titanate of raw ingredients having a grain size of below 0.6 μm and a chemical composition consisting essentially of from 50 to 60 weight % Al 2 O 3 , 40 to 45 weight % TiO 2 , 2 to 5 weight % kaolinite and 0.1 to 1 weight % sepiolite.
Claim 8
Dependent Claim
73 words
In the process of preparing a refractory ceramic article which employs an aluminum titanate, the improvement which comprises employing a silicate-containing aluminum titanate of raw ingredients having a grain size of below 0.6 μm and a chemical composition consisting essentially of from 50 to 60 weight % Al 2 O 3 , 40 to 45 weight % TiO 2 , 2 to 5 weight % kaolinite and 0.1 to 1 weight % sepiolite.
Claim 9
Dependent Claim
24 words
The method of claim 5 wherein said composition is 53.4% Al 2 O 3 , 42.8% TiO 2 , 3.4% kaolin and 0.4% sepiolite.
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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) | 1984-07-06 | 1985-01-05 | 1985-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-06 | 1989-01-05 | 1989-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-06 | 1993-01-05 | 1993-07-07 | $7700.00 | Window Closed / Lapsed |