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dc.contributor.authorPaitoon Boonsongen_US
dc.contributor.authorPimpilai Wannasuten_US
dc.contributor.authorSuwapitcha Bunthamen_US
dc.contributor.authorAmpika Rachakomen_US
dc.contributor.authorChakrit Sriprachuabwongen_US
dc.contributor.authorAdisorn Tuantranonten_US
dc.contributor.authorAnucha Watcharapasornen_US
dc.description.abstractDysprosium barium copper oxide (DyBCO) ceramic was successfully prepared by a solid-state reaction and sintering method. The DyBa2Cu3O7-d powder was synthesized by calcining its stoichiometric binary-oxides mixture at 900°C for 4 h. The DyBCO powder was compacted into pellets and sintered at 930°C for 2 h under normal air atmosphere. Phase identification was determined using an X-ray diffractometer (XRD). The quantitative phase analysis of ceramics was analyzed by fitting the XRD pattern using the GSAS-II program. The surface morphology was observed by scanning electron microscopy (SEM) with chemical composition identification from WDS mode. The result of XRD showed that the DyBa2Cu3O7-d (Dy-123) was identified as the main crystalline phase. The surface of Dy-123 ceramic exhibited a typical elongated form with an average grain size of ~ 3.74 mm. The compositional ratio of polished DyBCO ceramic was approximated to be Dy: Ba: Cu = 1: 2.13: 2.94. The total thermal conductivity values (k) of the DyBCO ceramic were found to decrease with increasing temperature. The k value was about 2.67 W/m-K at 298 K and 0.88 W/m-K at 973 K. The electrical conductivity (s) of DyBCO sample showed semiconducting to metallic-like transition after the temperature increased more than 700 K. The Seebeck coefficient (S) behavior may be attributed to low hole mobility of O-Cu-O chain and the inherent tetragonal structure at high temperature region. The maximum ZT value was about 1.38´10-2 at highest temperature measured.en_US
dc.publisherScience Faculty of Chiang Mai Universityen_US
dc.titleElectrical and Thermal Transport Properties of Dysprosium Barium Copper Oxide Ceramicen_US
article.title.sourcetitleChiang Mai Journal of Scienceen_US
article.volume45en_US of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.en_US School, Chiang Mai University, Chiang Mai 50200, Thailanden_US branch, Faculty of Science and Agricultural Technology, Rajamangala University of Technology Lanna, Chiang Mai 50300, Thailand.en_US of Advanced Materials for Printed Electronics and Sensors, Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.en_US Organic and Printed Electronics Innovation Center, National Electronics and Computer Technology Center, National Science and Technology Development Agency, Klong Luang, Pathumthani 12120, Thailand.en_US of Excellence in Materials Science and Technology, Chiang Mai University, Chiang Mai, 50200, Thailand.en_US
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