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Thermal expansivity...
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Niska, JohnLuleå tekniska universitet
(författare)
Thermal expansivity of HIP synthesized YBa2Cu4O8
- Artikel/kapitelEngelska1991
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2006-09-08
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IOP Publishing,1991
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LIBRIS-ID:oai:DiVA.org:ltu-15949
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https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-15949URI
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https://doi.org/10.1088/0031-8949/44/1/013DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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Godkänd; 1991; 20080307 (cira)
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The thermal expansion coefficient of a sample of the YBa2Cu4O8 phase superconductor was measured using a low temperature X-ray diffractometer. The thermal expansivity was found to be highly anisotropic. The average coefficient of thermal expansion over the temperature range of 150 to 450 K was approximately equal for the a and b axes at 9×10-6/°C, vs a coefficient of about 15×10-6/°C for the c axis. This would indicate that the bonding is weaker along the c-axis than in the ab-plane and that the specific heat of single crystals of the high Tc superconductors can depend on their geometry. The low thermal expansivity in the ab-plane relative to typical metal conductors as copper and silver could lead to compressive stresses in the superconductor when cooling a composite metal-superconductor wire having good alignment of the ab-plane along the wire axis
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Easterling, K.E.Luleå tekniska universitet(Swepub:ltu)bib-keneas
(författare)
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Loberg, Bengt
(författare)
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Luleå tekniska universitet
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Physica Scripta: IOP Publishing44:1, s. 93-940031-89491402-4896
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