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US4017426A
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Highly porous conductive ceramics and a method for the preparation of same
Assignee: Groupement Atomique Alsacienne Atlantique SA
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Filing: 1974-12-02
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Granted: 1977-04-12
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Expires: 1994-12-02
Abstract
Abstract Very porous conductive ceramic substances constituted of diborides and a certain percentage of disilicides of metals in groups IVa, Va, VIa of the periodical classification of elements. Preparing of ceramic substances by sintering of fine powders and of grains of a mixture of diborides and disilicides of metals in groups IVa, Va, VIa in the periodic classification of elements in presence of a fluoride.
Inventors
- 👤 Henri Carbonnel
- 👤 Ludovic Hamon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:13
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/5805; C04B35/58064; C04B35/58078; C04B35/58071; C04B38/00; C04B38/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
118 words
A porous electrically conductive molded ceramic product comprising more than 20% but no more than 80% by weight of grains Of a few millimeters in diameter comprising a diboride of one of, and of 0-25% of a disilicide of one of, the group of metals consisting of titanium, zirconium, hafnium, and tungsten, uniformly dispersed within less than 80% but no less than 20% by weight of a homogeneous sintered powder, said powder particles having a diameter of a few microns and comprising a mixture of a diboride of one of, and a disilicide of one of, the group of metals consisting of titanium, zirconium, hafnium and tungsten, said porous electrically conductive ceramic having a porosity greater than 30%.
Claim 2
Dependent Claim
118 words
A porous electrically conductive molded ceramic product comprising more than 20% but no more than 80% by weight of grains Of a few millimeters in diameter comprising a diboride of one of, and of 0-25% of a disilicide of one of, the group of metals consisting of titanium, zirconium, hafnium, and tungsten, uniformly dispersed within less than 80% but no less than 20% by weight of a homogeneous sintered powder, said powder particles having a diameter of a few microns and comprising a mixture of a diboride of one of, and a disilicide of one of, the group of metals consisting of titanium, zirconium, hafnium and tungsten, said porous electrically conductive ceramic having a porosity greater than 30%.
Claim 3
Dependent Claim
15 words
The porous conductive ceramic product of claim 1, having a porosity of 35 to 40%.
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) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |