FR2240900A2 - Semiconductors made from refractory oxide and a pyrolysed polymer - using impregnated alumina and pyrolysed organic cpds. - Google Patents

Semiconductors made from refractory oxide and a pyrolysed polymer - using impregnated alumina and pyrolysed organic cpds.

Info

Publication number
FR2240900A2
FR2240900A2 FR7428329A FR7428329A FR2240900A2 FR 2240900 A2 FR2240900 A2 FR 2240900A2 FR 7428329 A FR7428329 A FR 7428329A FR 7428329 A FR7428329 A FR 7428329A FR 2240900 A2 FR2240900 A2 FR 2240900A2
Authority
FR
France
Prior art keywords
pyrolysed
oxide
alumina
refractory oxide
polymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7428329A
Other languages
French (fr)
Other versions
FR2240900B2 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Universal Oil Products Co
Original Assignee
Universal Oil Products Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US389050A external-priority patent/US3916066A/en
Application filed by Universal Oil Products Co filed Critical Universal Oil Products Co
Publication of FR2240900A2 publication Critical patent/FR2240900A2/en
Application granted granted Critical
Publication of FR2240900B2 publication Critical patent/FR2240900B2/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5001—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with carbon or carbonisable materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors

Abstract

A semiconducting material is made from a refractory inorganic oxide with a specific surface of 25-500 m2/gram having a carbonised pyropolymer on its surface and an electrical conductivity (EC) at ambient temp. of about 10 degrees to 102mho.cm. The refractory oxide is pref. alumina, esp. gamma-alumina, silica, or a mixt. of Al2O3 and SiO2; many organic materials can be used for the coating, e.g. cyclohexane or benzene. The material is suitable for heterojunction transistors, field effect transistors, thermoelements in thermo-electric generators, refrigerators and temp. measurement, resistors, energy stores and memory stores. Materials can be made which are pyro-electric, ferroelectric and piezoelectric. The material has a thermal conductivity below 2.5 x 10-4 g./cal/sec./cm2/degrees C./cm thickness. By impregnating the oxide n- or p-type materials can be otbd.
FR7428329A 1973-08-16 1974-08-14 Semiconductors made from refractory oxide and a pyrolysed polymer - using impregnated alumina and pyrolysed organic cpds. Granted FR2240900A2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US389050A US3916066A (en) 1972-02-14 1973-08-16 Conducting material for conducting devices and method for forming the same

Publications (2)

Publication Number Publication Date
FR2240900A2 true FR2240900A2 (en) 1975-03-14
FR2240900B2 FR2240900B2 (en) 1977-11-10

Family

ID=23536617

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7428329A Granted FR2240900A2 (en) 1973-08-16 1974-08-14 Semiconductors made from refractory oxide and a pyrolysed polymer - using impregnated alumina and pyrolysed organic cpds.

Country Status (4)

Country Link
CA (1) CA1037841A (en)
DE (1) DE2439115A1 (en)
FR (1) FR2240900A2 (en)
IT (1) IT1046304B (en)

Also Published As

Publication number Publication date
FR2240900B2 (en) 1977-11-10
IT1046304B (en) 1980-06-30
DE2439115A1 (en) 1975-07-03
CA1037841A (en) 1978-09-05

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