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    題名: High frequency dielectric properties of Ba(Mg1/3Ta2/3)O3 complex perovskite ceramics
    作者: 林諭男;Lin, I. N.;Chia, C. T.;Liu, H. L.;Chen, Y. C.;Cheng, H. F.;Chi, C. C.
    貢獻者: 淡江大學物理學系
    關鍵詞: Ba(Mg,Ta,)O3 materials;FTIR spectroscopy;Microwave ceramics;Dielectric properties;Raman spectroscopy
    日期: 2003-12-01
    上傳時間: 2009-12-31 10:33:58 (UTC+8)
    出版者: Elsevier
    摘要: The dielectric properties of Ba(Mg1/3Ta2/3)O3 and Ba(Mg1/3Nb2/3)O3 ceramics were investigated using Fourier transformed infrared and Raman spectroscopies. The real part of dielectric constant of these materials decreases when the heavier Ta atoms replaced the lighter Nb atoms, which is closely related to the shift of mode-frequency. The Q-factor of the materials depends weakly on the composition. The decrease in Q-factor with the frequency is due to the presence of a resonance mode at around 3 THz. Larger width of the breathing Raman mode, A1g[O], correlates very well with the lower Q-value of the BMN materials, as compared with the BMT materials.
    關聯: Journal of the European Ceramic Society 23(14), pp.2633-2637
    DOI: 10.1016/S0955-2219(03)00160-2
    顯示於類別:[物理學系暨研究所] 期刊論文

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