Process for preparing high-transition-temperature superconductors in the Nb-Al-Ge system

Patent · Tue Jan 30 00:00:00 EST 1973

OSTI ID:7215802

Giorgi, A L; Szklarz, E G

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)

• Research Organization: USAEC, Washington, DC
• Assignee: EDB-77-100737
• Patent Number(s): US 3713898
• OSTI ID: 7215802
• Resource Relation: Patent File Date: Filed date 26 Apr 1971
• Country of Publication: United States
• Language: English

Related Subjects

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)