Title :
Processing of ceramic superconductors
Author :
Yan, M.F. ; Ling, H.C. ; O´Bryan, H.M. ; Gallagher, P.K. ; Rhodes, W.W.
Author_Institution :
AT&T Bell Lab., Murray Hill, NJ, USA
Abstract :
Processing of YBa/sub 2/Cu/sub 3/O/sub x/-based superconductors and process-related problems are described. Conditions for calcination, sintering and microstructural development are considered for the superconducting properties. Different forming techniques to prepare superconducting components with different sizes, shapes and configurations are examined. Five problem areas related to processing are identified and discussed: (1) incomplete decomposition of BaCO/sub 3/ precursor, (2) oxidation of YBa/sub 2/Cu/sub 3/O/sub x/ ceramics; (3) sensitivity of the YBa/sub 2/Cu/sub 3/O/sub x/ phase to water, (4) reactivity of the YBa/sub 2/Cu/sub 3/O/sub x/ phase with substrates and co-firing materials and (5) low critical current density in bulk ceramics of YBa/sub 2/Cu/sub 3/O/sub x/.<>
Keywords :
barium compounds; ceramics; copper compounds; critical current density (superconductivity); high-temperature superconductors; sintering; yttrium compounds; YBa/sub 2/Cu/sub 3/O/sub x/ ceramics; calcination; ceramic superconductors; co-firing materials; configurations; critical current density in bulk ceramics; forming techniques; incomplete decomposition; microstructural development; oxidation; problem areas; process-related problems; reactivity; sensitivity to water; sintering; superconducting components with different sizes; Calcination; Ceramics; High temperature superconductors; Powders; Superconducting epitaxial layers; Superconducting filaments and wires; Superconducting films; Superconducting integrated circuits; Superconducting materials; Superconductivity;
Conference_Titel :
Electronics Components Conference, 1988., Proceedings of the 38th
Conference_Location :
Los Angeles, CA, USA
DOI :
10.1109/ECC.1988.12583
