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Title: 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):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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}
}