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Microstructures and Microwave Dielectric Characteristics of Ba6 − 3x (Sm1 − y La y )8 + 2x Ti18O54 Solid Solutions (x = 2/3 and 0.75)

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Abstract

Ba6 − 3x (Sm1 − y La y )8 + 2x Ti18O54 solid solutions were prepared and characterized. For x = 2/3, tungsten bronze type solid solutions were observed in the entire range of y = 0–1. While, La substitution for Sm will change the phase constitution in Ba6 − 3x Sm8 + 2x Ti18O54 ceramics with x = 0.75. Though the single phase solid solutions were observed for the compositions at the vicinity of the end-members, La4Ti9O24 secondary phase was detected for the compositions of y = 0.3–0.8. For x = 2/3, the dielectric constant increased continuously with increasing y, and the Q · f value increased slightly at first then decreased. The dielectric constant had more complex change with increasing y for the situation of x = 0.75 where Q · f value decreased continuously. In both cases, the temperature coefficient of resonant frequency varied from negative to positive with increasing y.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Peoples' Republic of China

    X.M. Chen, N. Qin & Y. Li

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  1. X.M. Chen
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  2. N. Qin
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  3. Y. Li
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Chen, X., Qin, N. & Li, Y. Microstructures and Microwave Dielectric Characteristics of Ba6 − 3x (Sm1 − y La y )8 + 2x Ti18O54 Solid Solutions (x = 2/3 and 0.75). Journal of Electroceramics 9, 31–35 (2002). https://doi.org/10.1023/A:1021638017980

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  • DOI: https://doi.org/10.1023/A:1021638017980

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