Recent progress in Chevrel phase syntheses: A new low temperature synthesis of the superconducting lead compound

Journal Article · Sun May 01 04:00:00 EDT 1994 · Materials Research Bulletin; (United States)

DOI:https://doi.org/10.1016/0025-5408(94)90047-7· OSTI ID:7037145

Rabiller, P; Rabiller-Baudry, M; Even-Boudjada, S; Burel, L; Chevrel, R; Sergent, M ^[1]; Decroux, M; Cors, J ^[2]; Maufras, J L ^[3]

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1. Univ. de Rennes I, Rennes (France)
2. Univ. de Geneve, Geneve (Switzerland)
3. Univ. de Bretagne Occidentale, Lorient (France)

This paper reviews recent progress in the synthesis of Chevrel phases. The objective was to produce better microscopic homogeneity of the elements and/or precursors required to form the phase. Among these new processes, the one dealing with insertion of lead into the binary Mo[sub 6]S[sub 8] compound is particularly attractive for the development of Chevrel phase wire since the phase formation occurs at temperatures as low as 440 C. To achieve good microscopic homogeneity of PbMo[sub 6]S[sub 8] (PMS), PbS is used and the extra sulfur is removed under a hydrogen gas flow. Basic superconducting properties, like a.c. susceptibility transition and specific heat anomaly at T[sub c], demonstrate extremely fine superconducting particles. Further annealing at the moderate temperature of 600 C improves the homogeneity and/or the crystallinity of the powder.

• OSTI ID: 7037145
• Journal Information: Materials Research Bulletin; (United States), Journal Name: Materials Research Bulletin; (United States) Vol. 29:5; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
360607 -- Other Materials-- Superconducting Properties-- (1992-)
CHALCOGENIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FABRICATION
LEAD COMPOUNDS
LEAD SULFIDES
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
PHASE STUDIES
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
SUPERCONDUCTING WIRES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
WIRES