Method for preparing high transition temperature Nb/sub 3/Ge superconductors

Patent · Tue Oct 18 00:00:00 EDT 1977

OSTI ID:5125838

Newkirk, L R; Valencia, F A

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/sup 0/ 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. 2 claims, 1 figure.

• Assignee: Energy Research and Development Administration
• Patent Number(s): US 4054686
• Application Number: TRN: 12-009134
• OSTI ID: 5125838
• Resource Relation: Patent File Date: Filed date 26 Jun 1975; Other Information: PAT-APPL-590,757
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
GERMANIUM ALLOYS
CHEMICAL VAPOR DEPOSITION
NIOBIUM BASE ALLOYS
INTERMETALLIC COMPOUNDS
SUPERCONDUCTIVITY
ALLOYS
CHEMICAL COATING
DEPOSITION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
NIOBIUM ALLOYS
PHYSICAL PROPERTIES
SURFACE COATING
360101* - Metals & Alloys- Preparation & Fabrication
656102 - Solid State Physics- Superconductivity- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena- (-1987)