Microwave properties of Ba(Mg1/3Ta2/3) O3, Ba(Mg1/3Nb2/3)O3 and Ba(Co1/3Nb2/3)O3 ceramics revealed by Raman scattering

M. Y. Chen, C. T. Chia, I. N. Lin, L. J. Lin, C. W. Ahn, Shan Nahm

研究成果: 雜誌貢獻期刊論文同行評審

79 引文 斯高帕斯(Scopus)


Five Ba(Co1/3Nb2/3)O3 samples sintered at different temperatures (form 1350 to 1550 °C), one Ba(Mg1/3Ta2/3)O3 and a Ba(Mg1/3Nb2/3)O3 sample were examined by Raman scattering to reveal the correlation of the 1:2 ordered perovskite structure with the microwave properties, such as dielectric constant and Q factors. The Ba(Co1/3Nb2/3) O3 sample sintered at 1400 °C, which possesses the highest microwave Q value and the lowest dielectric constant among five Ba(Co1/3 Nb2/3)O3 samples, has the narrowest width and the highest frequency of the stretch mode of oxygen octahedron (i.e. A1g (O) near 800 cm-1). We found that the dielectric constant is strongly correlated with the Raman shift of A1g(O) stretch modes, and the width of A1g(O) stretch mode reflects the quality factor Q × f value in the 1:2 ordered perovskite materials. This concludes that the oxygen octahedron play an important role of the material's microwave performance. Based on the results of Q × f values and the lineshapes of A1g(O) stretch mode, we found that the propagation of microwave energy in Ba(Mg1/3Ta2/3)O3 and Ba(Mg1/3Nb2/3)O3 shows weak damping behavior, however, Ba(Co1/3 Nb2/3)O3 samples sintered at different temperature exhibit heavily damped behavior.

頁(從 - 到)1965-1968
期刊Journal of the European Ceramic Society
出版狀態已發佈 - 2006

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

指紋 深入研究「Microwave properties of Ba(Mg<sub>1/3</sub>Ta<sub>2/3</sub>) O<sub>3</sub>, Ba(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub> and Ba(Co<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub> ceramics revealed by Raman scattering」主題。共同形成了獨特的指紋。