EP0413740A1 - PROCEDE POUR ACCROITRE LA RESISTANCE DE SUPRACONDUCTEURS A HAUTE TEMPERATURE T c? CONTRE LES INFLUENCES DU MILIEU - Google Patents

PROCEDE POUR ACCROITRE LA RESISTANCE DE SUPRACONDUCTEURS A HAUTE TEMPERATURE T c? CONTRE LES INFLUENCES DU MILIEU

Info

Publication number
EP0413740A1
EP0413740A1 EP89905673A EP89905673A EP0413740A1 EP 0413740 A1 EP0413740 A1 EP 0413740A1 EP 89905673 A EP89905673 A EP 89905673A EP 89905673 A EP89905673 A EP 89905673A EP 0413740 A1 EP0413740 A1 EP 0413740A1
Authority
EP
European Patent Office
Prior art keywords
superconductor
environmental influences
resistance
superconductors
increasing
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.)
Withdrawn
Application number
EP89905673A
Other languages
German (de)
English (en)
Inventor
Joachim Maier
Pandiyan Murugaraj
Albrecht Rabenau
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.)
Hoechst AG
Original Assignee
Hoechst AG
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
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of EP0413740A1 publication Critical patent/EP0413740A1/fr
Withdrawn legal-status Critical Current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
    • C04B41/46—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 organic materials
    • C04B41/49—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes
    • C04B41/4905—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon
    • C04B41/4922—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon applied to the substrate as monomers, i.e. as organosilanes RnSiX4-n, e.g. alkyltrialkoxysilane, dialkyldialkoxysilane
    • C04B41/4933—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon applied to the substrate as monomers, i.e. as organosilanes RnSiX4-n, e.g. alkyltrialkoxysilane, dialkyldialkoxysilane containing halogens, i.e. organohalogen silanes
    • 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
    • C04B41/82—Coating or impregnation with organic materials
    • C04B41/84—Compounds having one or more carbon-to-metal of carbon-to-silicon linkages
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N60/00—Superconducting devices
    • H10N60/01—Manufacture or treatment
    • H10N60/0268—Manufacture or treatment of devices comprising copper oxide
    • H10N60/0661—Processes performed after copper oxide formation, e.g. patterning
    • H10N60/0716—Passivating

Definitions

  • the present invention relates to a method for increasing the resistance of high-T c superconductors to environmental influences.
  • the method involves treating a high-T c superconductor material in the form of powder, grains, thin layers or ceramic bodies with an organohalosilane, such as (CH 3 ) 3 SiCl.
  • H 2 O which is adsorbed on the surface of the superconductor material, is removed with elimination of HCl, whereby (CH 3 ) 3 SiOH adsorbates are formed.
  • Surface hydroxide groups typically surface groups of oxides
  • Water-repellent (CH 3 ) 3 SiO groups are bound to the surface to be protected.
  • the superconductor material treated in this way is not wetted by water and shows a considerably higher resistance to environmental influences than untreated material.
  • an organohalosilane such as (CH 3 ) 3 SiCl.
  • This process step is particularly effective in the case of oxidic high-T c solar conductor materials which are based on divalent element (E) and, if appropriate. on trivalent element (M) are slightly inferior.
  • the superconducting oxides "impregnated" in this way are clearly water-repellent and are not wetted by liquid water. No significant deterioration in properties was observed after treatment with H 2 O for one week.
  • alkylhalosilanes or halogenated hydrocarbons such as tertiary butyl chloride, (CH 3 ) 3 CC1, can of course also be used.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

La résistance de supraconducteurs céramiques à haute température Tc, comme YBa2Cu3Ox, contre les influences du milieu, notamment l'humidité, est notablement accrue par l'introduction de groupes protecteurs de surface hydrofuges. Le matériau supraconducteur est à cet effet brièvement prétraité avec de l'eau puis traité dans du (CH3)3SiCl ou un matériau analogue.
EP89905673A 1988-05-10 1989-05-10 PROCEDE POUR ACCROITRE LA RESISTANCE DE SUPRACONDUCTEURS A HAUTE TEMPERATURE T c? CONTRE LES INFLUENCES DU MILIEU Withdrawn EP0413740A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3816029 1988-05-10
DE3816029A DE3816029A1 (de) 1988-05-10 1988-05-10 Verfahren zum erhoehen der bestaendigkeit von hoch-t(pfeil abwaerts)c(pfeil abwaerts)-supraleitern gegen umgebungseinfluesse

Publications (1)

Publication Number Publication Date
EP0413740A1 true EP0413740A1 (fr) 1991-02-27

Family

ID=6354116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89905673A Withdrawn EP0413740A1 (fr) 1988-05-10 1989-05-10 PROCEDE POUR ACCROITRE LA RESISTANCE DE SUPRACONDUCTEURS A HAUTE TEMPERATURE T c? CONTRE LES INFLUENCES DU MILIEU

Country Status (4)

Country Link
EP (1) EP0413740A1 (fr)
JP (1) JPH04501700A (fr)
DE (1) DE3816029A1 (fr)
WO (1) WO1989010909A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2010335A1 (fr) * 1989-03-09 1990-09-09 Ronald H. Baney Methode de depot de couches de protection sur les supraconducteurs
DE4117489A1 (de) * 1991-05-28 1992-12-03 Siemens Ag Chemische politur einer oberflaeche eines kupfer enthaltenden keramischen supraleiters
DE4304573A1 (de) * 1993-02-16 1994-08-18 Forschungsgesellschaft Fuer In Passivierungsschicht für Hochtemperatur-Supraleiter und Verfahren zu ihrer Aufbringung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1060424A (fr) * 1952-07-19 1954-04-01 Rhone Poulenc Sa Procédé d'hydrofugation de corps solides
FR1180848A (fr) * 1956-08-09 1959-06-09 Thomson Houston Comp Francaise Papier de mica résistant à l'eau
FR1323478A (fr) * 1962-06-04 1963-04-05 Dow Corning Traitement de matières par des alkoxysilanes entraînés à la vapeur d'eau
DE3635260A1 (de) * 1986-10-16 1988-04-28 Wacker Chemie Gmbh Verfahren zum wasserabweisendmachen von saugfaehigen anorganischen baustoffen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8910909A1 *

Also Published As

Publication number Publication date
WO1989010909A1 (fr) 1989-11-16
JPH04501700A (ja) 1992-03-26
DE3816029A1 (de) 1989-11-16

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Legal Events

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