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Title: Method for preparing high transition temperature Nb/sub 3/Ge superconductors. [Patent application]

Abstract

Bulk coatings of Nb/sub 3/Ge superconductors having transition temperatures in excess of 20/sup 0/K are readily formed by a chemical vapor deposition technique involving the coreduction of NbCl/sub 5/ and GeCl/sub 4/ in the presence of hydrogen. The NbCl/sub 5/ vapor may advantageously be formed quantitatively in the temperature range of about 250 to 260/sup 0/C by the chlorination of Nb metal provided the partial pressure of the product NbCl/sub 5/ vapor is maintained at or below about 0.1 atm.

Inventors:
;
Issue Date:
OSTI Identifier:
7185853
Application Number:
TRN: 76-017441
Assignee:
Energy Research and Development Administration
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; GERMANIUM ALLOYS; CHEMICAL VAPOR DEPOSITION; NIOBIUM ALLOYS; BINARY ALLOY SYSTEMS; GERMANIUM CHLORIDES; HYDROGEN; INTERMETALLIC COMPOUNDS; NIOBIUM CHLORIDES; REDUCTION; SUPERCONDUCTIVITY; VERY LOW TEMPERATURE; ALLOY SYSTEMS; ALLOYS; CHEMICAL COATING; CHEMICAL REACTIONS; CHLORIDES; CHLORINE COMPOUNDS; CRYOGENIC FLUIDS; DEPOSITION; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELEMENTS; FLUIDS; GERMANIUM COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; NIOBIUM COMPOUNDS; NONMETALS; PHYSICAL PROPERTIES; SURFACE COATING; TRANSITION ELEMENT COMPOUNDS; 360101* - Metals & Alloys- Preparation & Fabrication; 656102 - Solid State Physics- Superconductivity- Acoustic, Electronic, Magnetic, Optical, & Thermal Phenomena- (-1987)

Citation Formats

Newkirk, L R, and Valencia, F A. Method for preparing high transition temperature Nb/sub 3/Ge superconductors. [Patent application]. United States: N. p., 1975. Web.
Newkirk, L R, & Valencia, F A. Method for preparing high transition temperature Nb/sub 3/Ge superconductors. [Patent application]. United States.
Newkirk, L R, and Valencia, F A. Thu . "Method for preparing high transition temperature Nb/sub 3/Ge superconductors. [Patent application]". United States.
@article{osti_7185853,
title = {Method for preparing high transition temperature Nb/sub 3/Ge superconductors. [Patent application]},
author = {Newkirk, L R and Valencia, F A},
abstractNote = {Bulk coatings of Nb/sub 3/Ge superconductors having transition temperatures in excess of 20/sup 0/K are readily formed by a chemical vapor deposition technique involving the coreduction of NbCl/sub 5/ and GeCl/sub 4/ in the presence of hydrogen. The NbCl/sub 5/ vapor may advantageously be formed quantitatively in the temperature range of about 250 to 260/sup 0/C by the chlorination of Nb metal provided the partial pressure of the product NbCl/sub 5/ vapor is maintained at or below about 0.1 atm.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1975},
month = {6}
}