US4152166A
Expired / Lapsed
US
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Zircon-containing compositions and ceramic bodies formed from such compositions
Assignee: Foseco Trading AG
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Filing: 1977-03-22
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Granted: 1979-05-01
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Expires: 1997-03-22
Abstract
Abstract Zircon-containing bodies of very high density and resistance to thermal shock can be made by firing a mixture of comminuted plasma dissociated zircon and an alkaline earth metal oxide and/or transition metal oxide.
Inventors
- 👤 Maurice G. Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:13
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/10; H01M8/12; H01M8/124; H01M8/1246; H01M8/1253; C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/481; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
A highly thermal shock resistant, highly abrasion resistant ceramic body having a porosity of less than 5%, said body being formed by firing for about ten hours at a temperature of at least 1350° C., a composition comprising 95 to 99.5% by weight plasma dissociated zircon and 0.5 to 5.0% by weight of an oxide selected from the class consisting of alkaline earth metal oxides and transition metal oxides, the particle size of all the components being less than 0.053 mm.
Claim 2
Dependent Claim
81 words
A highly thermal shock resistant, highly abrasion resistant ceramic body having a porosity of less than 5%, said body being formed by firing for about ten hours at a temperature of at least 1350° C., a composition comprising 95 to 99.5% by weight plasma dissociated zircon and 0.5 to 5.0% by weight of an oxide selected from the class consisting of alkaline earth metal oxides and transition metal oxides, the particle size of all the components being less than 0.053 mm.
Claim 3
Dependent Claim
32 words
A ceramic body according to claim 1 wherein the oxide is of a transition metal and is present in an amount of 0.5 to 4% by weight of the plasma dissociated zircon.
Claim 4
Dependent Claim
30 words
A ceramic body according to claim 1 wherein the oxide is iron oxide and is present in a proportion of 0.5 to 1.5% by weight of the plasma dissociated zircon.
Claim 5
Dependent Claim
30 words
A ceramic body according to claim 1 wherein the oxide is magnesium oxide and is present in a proportion of 1 to 3% by weight of the plasma dissociated zircon.
Claim 6
Dependent Claim
24 words
A ceramic body according to claim 1 which includes a further material selected from the class consisting of refractory oxides, carbides, silicates and graphite.
Claim 7
Dependent Claim
94 words
In the method of forming a highly thermal shock resistant, highly abrasion resistant ceramic body having a porosity of less than 5%, said method comprising providing a composition comprising 95 to 99.5% by weight plasma dissociated zircon and 0.5 to 5.0% by weight of an oxide selected from the class consisting of alkaline earth metal oxides and transition metal oxides, the particle size of all the components being less than 0.053 mm, compressing said composition into a body and firing said body for about ten hours at a temperature of at least 1350° C.
Claim 8
Dependent Claim
94 words
In the method of forming a highly thermal shock resistant, highly abrasion resistant ceramic body having a porosity of less than 5%, said method comprising providing a composition comprising 95 to 99.5% by weight plasma dissociated zircon and 0.5 to 5.0% by weight of an oxide selected from the class consisting of alkaline earth metal oxides and transition metal oxides, the particle size of all the components being less than 0.053 mm, compressing said composition into a body and firing said body for about ten hours at a temperature of at least 1350° C.
Claim 9
Dependent Claim
28 words
The method of claim 6 which includes the step of incorporating an organic binder into the composition in order to assist forming the composition to the desired shape.
Claim 10
Dependent Claim
22 words
The method of claim 6 wherein the firing is carried out to a temperature in the range of 1350° to 1500° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-30 | 1982-10-30 | 1983-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-30 | 1986-10-30 | 1987-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-30 | 1990-10-30 | 1991-05-01 | $7700.00 | Window Closed / Lapsed |