dc.contributor.author | Wan, Chunlei | |
dc.contributor.author | Sparks, Taylor David | |
dc.contributor.author | Wei, Pan | |
dc.contributor.author | Clarke, David R. | |
dc.date.accessioned | 2013-09-19T21:34:45Z | |
dc.date.issued | 2010 | |
dc.identifier.citation | Wan, Chunlei, Taylor D. Sparks, Pan Wei, David R. Clarke. 2010. Thermal conductivity of the rare-earth strontium aluminates. Journal of the American Ceramic Society 93(5): 1457-1460. | en_US |
dc.identifier.issn | 0002-7820 | en_US |
dc.identifier.uri | http://nrs.harvard.edu/urn-3:HUL.InstRepos:11077825 | |
dc.description.abstract | The thermal conductivity of a series of complex aluminates, RE2SrAl2O7, with different rare-earth (RE) ions, has been measured up to 1000°C. There is a strong dependence on the atomic number of the RE ion, ranging from an approximately 1/T dependence for the lanthanum strontium aluminate to an almost temperature-independent behavior of the dysprosium strontium aluminate. The latter conductivity is comparable with that of yttria-stabilized zirconia, the current material of choice for thermal barrier coatings. The temperature dependence of the thermal conductivities of all the aluminates studied can be fit to a standard phonon–phonon scattering model, modified to account for a minimum phonon mean free path, in which the difference in behavior is attributed to increased phonon–phonon scattering with the atomic mass of the RE ion. Although a satisfactory parametric fit is obtained, the model does not take into account either the detailed layer structure of the aluminates, consisting of alternating rock-salt and perovskite layers in a natural superlattice structure, or the site preferences of the RE ion. This suggests that further model development is warranted. | en_US |
dc.description.sponsorship | Engineering and Applied Sciences | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | Wiley-Blackwell | en_US |
dc.relation.isversionof | doi:10.1111/j.1551-2916.2009.03594.x | en_US |
dash.license | META_ONLY | |
dc.title | Thermal Conductivity of the Rare-Earth Strontium Aluminates | en_US |
dc.type | Journal Article | en_US |
dc.description.version | Version of Record | en_US |
dc.relation.journal | Journal of the American Ceramic Society | en_US |
dash.depositing.author | Clarke, David R. | |
dash.embargo.until | 10000-01-01 | |
dash.affiliation.other | UCSB | en_US |
dash.affiliation.other | Tsinghua University | en_US |
dc.identifier.doi | 10.1111/j.1551-2916.2009.03594.x | * |
dash.contributor.affiliated | Sparks, Taylor David | |
dash.contributor.affiliated | Clarke, David | |