Development of long Nb/sub 3/Ge tape with T/sub c/ above 20 K

Conference · Tue Sep 01 04:00:00 EDT 1981 · IEEE Trans. Magn.; (United States)

OSTI ID:6243254

Cernusko, V; Frohlich, K; Machajdik, D; Jergel, M

Superconducting Nb/sub 3/Ge tapes were prepared continuously by chemical vapor deposition. The chlorides NbCl/sub 4/ and GeCl/sub 2/ prepared ''in situ'' were used. Films were deposited on the stainless steel substrate heated by passing the direct current through it. The content of the Nb/sub 3/Ge phase in the deposited layer films at constant molar ratio of NbCl/sub 4/ and GeCl/sub 2/ depends mainly on the heating current of the substrate as well as on the flow of the reaction gas mixture. The tapes with critical temperatures above 20 K in undoped atmosphere have been produced. The addition of oxygen into the reaction gas mixture up to 0.027 mole did not lower generally the T/sub c/'s under the 20 K value. The critical current densities of the Nb/sub 3/Ge layers are from 1 to 5X10/sup 5//cm/sup 2/ in a magnetic field to 3 T. 18 refs.

• Research Organization: Slovak Acad of Sci, Electrotech Inst, Bratislava, Czechoslovakia
• OSTI ID: 6243254
• Report Number(s): CONF-810340-
• Conference Information: Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: MAG-17:5
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
CABLES
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
CHLORIDES
CHLORINE COMPOUNDS
CONDUCTOR DEVICES
CRITICAL TEMPERATURE
DEPOSITION
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
EQUIPMENT
FABRICATION
GERMANIUM ALLOYS
HALIDES
HALOGEN COMPOUNDS
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
OXYGEN ADDITIONS
PHYSICAL PROPERTIES
SAMPLE PREPARATION
SUPERCONDUCTING CABLES
SUPERCONDUCTORS
SURFACE COATING
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VERY LOW TEMPERATURE