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

Patent · 31 December 1976

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
• 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

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