Thermal conductivity of self-assembled nano-structured ZnO bulk ceramics

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dc.contributorCenter for Energy Harvesting Materials and Systems (CEHMS). Bio-Inspired Materials and Devices Laboratory (BMDL)en
dc.contributorOak Ridge National Laboratory. Materials Science and Technology Divisionen
dc.contributor.authorZhao, Yuen
dc.contributor.authorYan, Yongkeen
dc.contributor.authorKumar, Ashoken
dc.contributor.authorWang, Hsinen
dc.contributor.authorPorter, Wallace D.en
dc.contributor.authorPriya, Shashanken
dc.date.accessed2015-04-24en
dc.date.accessioned2015-05-04T20:06:13Zen
dc.date.available2015-05-04T20:06:13Zen
dc.date.issued2012-08-01en
dc.description.abstractIn this study, we describe the changes in thermal conductivity behavior of ZnO-Al micro- and nano-two-phase self-assembled composites with varying grain sizes. The reduction in thermal conductivity values of micro-composites was limited to similar to 15% for ZnO-4% Al. However, nano-composites exhibited large reduction, by a factor of about three, due to uniform distribution of nano-precipitates (ZnAl2O4) and large grain boundary area. Interestingly, the micro-composites revealed continuous decrease in thermal conductivity with increase in Al substitution while the nano-composites exhibited the lowest magnitudes for 2% Al concentration. Raman spectra indicated that phonon confinement in ZnO-Al nano-composites causes drastic decrease in the value of thermal conductivity. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4745034]en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1063/1.4745034en
dc.identifier.issn0021-8979en
dc.identifier.urihttp://hdl.handle.net/10919/51989en
dc.identifier.urlhttp://scitation.aip.org/content/aip/journal/jap/112/3/10.1063/1.4745034en
dc.language.isoen_USen
dc.publisherAmerican Institute of Physicsen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectII-VI semiconductorsen
dc.subjectPhononsen
dc.subjectThermal conductivityen
dc.subjectNanocompositesen
dc.subjectNanopowdersen
dc.titleThermal conductivity of self-assembled nano-structured ZnO bulk ceramicsen
dc.title.serialJournal of Applied Physicsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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