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

Patent · Sat Jan 01 00:00:00 EST 1977

OSTI ID:862943

Newkirk, Lawrence R ^[1]; Valencia, Flavio A ^[2]

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1. Los Alamos, NM
2. Santa Fe, NM

Bulk coatings of Nb.sub.3 Ge superconductors having transition temperatures in excess of 20 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.degree. to 260.degree. 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.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Assignee: United States of America as represented by United States Energy (Washington, DC)
• Patent Number(s): US 4054686
• OSTI ID: 862943
• Country of Publication: United States
• Language: English

Related Subjects

method
preparing
transition
temperature
nb
superconductors
bulk
coatings
temperatures
excess
20
readily
formed
chemical
vapor
deposition
technique
involving
coreduction
nbcl
gecl
presence
hydrogen
advantageously
quantitatively
range
250
degree
260
chlorination
metal
provided
partial
pressure
product
maintained
below
atm
chemical vapor
temperature range
vapor deposition
partial pressure
transition temperature
readily formed
transition temperatures
deposition technique
bulk coatings
/427/29/420/423/505/