Article (Scientific journals)
The influence of a grain boundary on the thermal transport properties of bulk, melt-processed Y-Ba-Cu-O
Marchal, C.; Fagnard, Jean-François; Shi, Y. H. et al.
2013In Superconductor Science and Technology, 26, p. 015006
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Keywords :
Electrical resistivity; Grain boundaries; Thermal conductivity
Abstract :
[en] We report the dependence of thermal conductivity, thermoelectric power and electrical resistivity on temperature for a bulk, large grain melt-processed Y-Ba-Cu-O (YBCO) high temperature superconductor (HTS) containing two grains separated by a well-defined grain boundary. Transport measurements at temperatures between 10 and 300 K were carried out both within one single grain (intra-granular properties) and across the grain boundary (inter-granular properties). The influence of an applied external magnetic field of up to 8 T on the measured sample properties was also investigated. The presence of the grain boundary is found to affect strongly the electrical resistivity of the melt-processed bulk sample, but has almost no effect on its thermoelectric power and thermal conductivity, within experimental error. The results of this study provide direct evidence that the heat flow in multi-granular melt-processed YBCO bulk samples should be virtually unaffected by the presence of grain boundaries in the material. © 2013 IOP Publishing Ltd.
Research center :
SUPRATECS - Services Universitaires pour la Recherche et les Applications Technologiques de Matériaux Électro-Céramiques, Composites, Supraconducteurs - ULiège
Disciplines :
Materials science & engineering
Electrical & electronics engineering
Physics
Author, co-author :
Marchal, C.;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques
Fagnard, Jean-François  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques
Shi, Y. H.;  University of Cambridge
Cardwell, D. A.;  University of Cambridge
Mucha, J.;  W Trzebiatowski Institute for Low Temperature and Structure Research, > Polish Academy of Sciences, Wroclaw, Poland
Misiorek, H.;  W Trzebiatowski Institute for Low Temperature and Structure Research, > Polish Academy of Sciences, Wroclaw, Poland
Cloots, Rudi ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Vertruyen, Bénédicte  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale
Vanderbemden, Philippe  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques
Language :
English
Title :
The influence of a grain boundary on the thermal transport properties of bulk, melt-processed Y-Ba-Cu-O
Publication date :
2013
Journal title :
Superconductor Science and Technology
ISSN :
0953-2048
eISSN :
1361-6668
Publisher :
Institute of Physics Publishing, Bristol, United Kingdom
Volume :
26
Pages :
015006
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
FWB - Fédération Wallonie-Bruxelles [BE]
ERM - Ecole Royale Militaire [BE]
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
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