US4041143A
Expired / Lapsed
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Process for preparing fibrous alkali metal titanate
Assignee: National Institute for Materials Science
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Filing: 1976-03-19
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Granted: 1977-08-09
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Expires: 1996-03-19
Abstract
Abstract Fibrous alkali metal titanate is prepared by mixing 5-50 mole % of an alkali metal titanate or an alkali metal titanate forming components with a flux of an alkali tungstate or molybdate, and heating the mixture at 700 DEG -1,350 DEG C to grow the fibrous product in the molten flux mixture.
Inventors
- 👤 Yoshinori Fujiki
- 👤 Fujio Izumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:13
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/003; C01G23/005; C01P; C01P2004/00; C01P2004/10; C01P2004/50; C01P2004/54; C01P2004/60; C01P2004/61; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
A process for preparing a fibrous alkali metal titanate, which comprises: mixing 5-50 mole % of an alkali metal titanate of the formula: M 2 O (TiO 2 ) n , wherein M is sodium, potassium, rubidium or cesium and n ranges from 1 to 7, or an alkali metal titanate forming components with a flux of sodium, potassium, rubidium or cesium tungstate or molybdate, wherein the alkali metal component of each reactant is the same alkali metal; melting the mixture at a temperature of 700°-1350° C., whereby said alkali metal titanate grows as a fibrous material; and recovering said fibrous alkali metal titanate from said flux.
Claim 2
Dependent Claim
107 words
A process for preparing a fibrous alkali metal titanate, which comprises: mixing 5-50 mole % of an alkali metal titanate of the formula: M 2 O (TiO 2 ) n , wherein M is sodium, potassium, rubidium or cesium and n ranges from 1 to 7, or an alkali metal titanate forming components with a flux of sodium, potassium, rubidium or cesium tungstate or molybdate, wherein the alkali metal component of each reactant is the same alkali metal; melting the mixture at a temperature of 700°-1350° C., whereby said alkali metal titanate grows as a fibrous material; and recovering said fibrous alkali metal titanate from said flux.
Claim 3
Dependent Claim
24 words
The process of claim 1, wherein said alkali metal titanate-forming components are a mixture of titanium oxide and an alkali metal hydroxide or carbonate.
Claim 4
Dependent Claim
20 words
The process of claim 1, wherein the fibrous product is grown in the molten flux mixture at substantially constant temperature.
Claim 5
Dependent Claim
20 words
The process of claim 1, wherein the fibrous product is grown in the molten flux mixture while annealing said mixture.
Claim 6
Dependent Claim
18 words
The process of claim 4, wherein the molten flux is annealed at a rate of about 4° C./hour.
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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |