Process for preparing high-transition-temperature superconductors in the Nb-Al-Ge system
Abstract
The patent describes a process for preparing superconducting materials in the Nb-Al-Ge system having transition temperatures in excess of 19K. The process comprises premixing powdered constituents, pressing them into a plug, heating the plug to 1,450-1,800C for 30 minutes to an hour under vacuum or an inert atmosphere, and annealing at moderate temperatures for reasonably long times (approximately 50 hours). High transition-temperature superconductors, including those in the Nb3(Al,Ge) system, prepared in accordance with this process exhibit little degradation in the superconducting transition temperature on being ground to -200 mesh powder. (GRA)
- Inventors:
- Issue Date:
- Research Org.:
- USAEC, Washington, DC
- OSTI Identifier:
- 7215802
- Patent Number(s):
- 3713898
- Assignee:
- EDB-77-100737
- Patent Classifications (CPCs):
-
C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: Filed date 26 Apr 1971
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM ALLOYS; FABRICATION; GERMANIUM ALLOYS; NIOBIUM ALLOYS; SUPERCONDUCTORS; ANNEALING; POWDER METALLURGY; TRANSITION TEMPERATURE; ALLOYS; HEAT TREATMENTS; METALLURGY; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES; 360101* - Metals & Alloys- Preparation & Fabrication; 360104 - Metals & Alloys- Physical Properties; 656102 - Solid State Physics- Superconductivity- Acoustic, Electronic, Magnetic, Optical, & Thermal Phenomena- (-1987)
Citation Formats
Giorgi, A L, and Szklarz, E G. Process for preparing high-transition-temperature superconductors in the Nb-Al-Ge system. United States: N. p., 1973.
Web.
Giorgi, A L, & Szklarz, E G. Process for preparing high-transition-temperature superconductors in the Nb-Al-Ge system. United States.
Giorgi, A L, and Szklarz, E G. Tue .
"Process for preparing high-transition-temperature superconductors in the Nb-Al-Ge system". United States.
@article{osti_7215802,
title = {Process for preparing high-transition-temperature superconductors in the Nb-Al-Ge system},
author = {Giorgi, A L and Szklarz, E G},
abstractNote = {The patent describes a process for preparing superconducting materials in the Nb-Al-Ge system having transition temperatures in excess of 19K. The process comprises premixing powdered constituents, pressing them into a plug, heating the plug to 1,450-1,800C for 30 minutes to an hour under vacuum or an inert atmosphere, and annealing at moderate temperatures for reasonably long times (approximately 50 hours). High transition-temperature superconductors, including those in the Nb3(Al,Ge) system, prepared in accordance with this process exhibit little degradation in the superconducting transition temperature on being ground to -200 mesh powder. (GRA)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1973},
month = {1}
}
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