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, Sahn Nahm

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish
Pages (from-to)1965-1968
Number of pages4
JournalJournal of the European Ceramic Society
Volume26
Issue number10-11
DOIs
Publication statusPublished - 2006 Apr 11

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Raman scattering
Microwaves
Permittivity
Perovskite
Oxygen
Damping
Temperature
perovskite

Keywords

  • Dielectric properties
  • Optical properties
  • Perovskites
  • Raman scattering

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Microwave properties of Ba(Mg1/3Ta2/3) O3, Ba(Mg1/3Nb2/3)O3 and Ba(Co1/3Nb2/3)O3 ceramics revealed by Raman scattering. / Chen, M. Y.; Chia, C. T.; Lin, I. N.; Lin, L. J.; Ahn, C. W.; Nahm, Sahn.

In: Journal of the European Ceramic Society, Vol. 26, No. 10-11, 11.04.2006, p. 1965-1968.

Research output: Contribution to journalArticle

Chen, M. Y. ; Chia, C. T. ; Lin, I. N. ; Lin, L. J. ; Ahn, C. W. ; Nahm, Sahn. / Microwave properties of Ba(Mg1/3Ta2/3) O3, Ba(Mg1/3Nb2/3)O3 and Ba(Co1/3Nb2/3)O3 ceramics revealed by Raman scattering. In: Journal of the European Ceramic Society. 2006 ; Vol. 26, No. 10-11. pp. 1965-1968.
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T1 - Microwave properties of Ba(Mg1/3Ta2/3) O3, Ba(Mg1/3Nb2/3)O3 and Ba(Co1/3Nb2/3)O3 ceramics revealed by Raman scattering

AU - Chen, M. Y.

AU - Chia, C. T.

AU - Lin, I. N.

AU - Lin, L. J.

AU - Ahn, C. W.

AU - Nahm, Sahn

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N2 - 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.

AB - 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.

KW - Dielectric properties

KW - Optical properties

KW - Perovskites

KW - Raman scattering

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JF - Journal of the European Ceramic Society

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