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Effects of Y2O3 substitution on microwave dielectric properties of Ba(Co0.6Zn0.38)1/3Nb2/3O3 ceramics

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Abstract

The effects of Y2O3 substitution on the microstructure and microwave dielectric properties of Ba(Co0.6−xYxZn0.38)1/3Nb2/3O3 (x = 0–0.06) ceramics prepared by the conventional solid-state route technique were investigated. The X-ray diffraction results presented that all the well sintered samples exhibited the main phase BaZn0.33Nb0.67O3–Ba3CoNb2O9 and a certain amount of Ba8CoNb6O24 second phase. The 1:2 B-site cation ordering degree was found to influenced by the replacement of Y3+, especially for x = 0.02. Then the scanning electron microscopy pictures of the optimally well-sintered (1375 °C for 20 h) ceramics has shown a dense microstructure. Although the ε r almost kept unchanged, appropriate doping content would greatly improve the Q × f value. Meanwhile, the τ f value increased slightly with increasing x. At last, the excellent microwave dielectric properties of ε r  = 35.21, Q × f = 72,046 GHz, τ f  = 3.65 ppm/°C were obtained for x = 0.02 sintered in air at 1375 °C for 20 h.

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Authors and Affiliations

  1. School of Microelectronics and Solid State Electronics, University of Electronic Science and Technology of China, Chengdu, 610054, People’s Republic of China

    Xiaohua Zhou, Yuqin Zhang, Xinshi Yang, Chengli Sun, Hetuo Chen & Shuren Zhang

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  1. Xiaohua Zhou
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  2. Yuqin Zhang
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  4. Chengli Sun
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Correspondence to Xiaohua Zhou.

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Zhou, X., Zhang, Y., Yang, X. et al. Effects of Y2O3 substitution on microwave dielectric properties of Ba(Co0.6Zn0.38)1/3Nb2/3O3 ceramics. J Mater Sci: Mater Electron 26, 7683–7689 (2015). https://doi.org/10.1007/s10854-015-3409-1

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  • DOI: https://doi.org/10.1007/s10854-015-3409-1

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