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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/27663

    Title: Characterizing xBa(Mg1/3Ta2/3)O3+(1-x)Ba(Mg1/3Nb2/3)O3 microwave ceramics using extended x-ray absorption fine structure method
    Authors: Chang, P. J.;Chia, C. T.;Lin, I-nan;Lee, J. F.;Lin, C. M.;Wu, K. T.
    Contributors: 淡江大學物理學系
    Date: 2006-06
    Issue Date: 2009-12-31 10:35:21 (UTC+8)
    Publisher: College Park: American Institute of Physics
    Abstract: The structures of TaO6 and NbO6 oxygen octahedra in xBa(Mg1/3Ta2/3)O3+(1−x)Ba(Mg1/3Nb2/3)O3 perovskite ceramics with x = 0, 0.25, 0.50, 0.75, and 1.0 were investigated by the extended x-ray absorption fine structure method. The decline in the microwave dielectric constant as x increases is caused mainly by the decrease of the mean volume of the oxygen octahedra, regardless of the 1:2 ordered structure and the distortion of the oxygen octahedron. The low Qf values of the TaO6 and NbO6 mixed samples are caused by not only the degrading of the 1:2 ordered structure but also the distortion of oxygen octahedral cages.
    Relation: Applied Physics Letters 88(24), 242907(3pages)
    DOI: 10.1063/1.2213514
    Appears in Collections:[Graduate Institute & Department of Physics] Journal Article

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