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Improved sintering characteristics and microwave dielectric properties of CaLa4Ti4O15 ceramics with BiVO4 addition

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Abstract

Effects of BiVO4 addition on the sintering behavior, crystal structure, microstructure and microwave dielectric properties of CaLa4Ti4O15 ceramics were investigated. When BiVO4 addition is below 3 %, the sintering temperature of CaLa4Ti4O15 ceramics is reduced from 1,550 °C to about 1,400 °C. And only phase CaLa4Ti4O15 is observed in the CaLa4Ti4O15 ceramics. However, the secondary phase CaLa4Ti5O17 appears when BiVO4 addition reached 3 %. It is important that a small amount of BiVO4 addition can not only lower the sintering temperature but also improve the microwave dielectric properties of CaLa4Ti4O15 ceramics. The CaLa4Ti4O15 ceramics with 1.0 % BiVO4 addition, which is sintered at 1,425 °C, exhibits excellent microwave dielectric properties of ε = 44.3, Qf = 51,377 GHz, τ f  = −9.0 ppm/°C. The variation of microwave dielectric properties had been also discussed with the structure evolution.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (No. 51001027), Program for Fujian province development and reform commission (NDRC2013) and Fuzhou University Science Foundation (2010-XQ-01).

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Authors and Affiliations

  1. State Key Laboratory Breeding Base of Photocatalysis, College of Materials Science and Engineering, Fuzhou University, 2 Xueyuan Road, University Town, Fuzhou, 350108, China

    X. Huang, X. M. Li & X. H. Zheng

  2. College of Zijin Mining, Fuzhou University, 2 Xueyuan Road, University Town, Fuzhou, 350108, China

    D. P. Tang

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  1. X. Huang
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  2. X. M. Li
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  3. D. P. Tang
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  4. X. H. Zheng
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Correspondence to X. H. Zheng.

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Huang, X., Li, X.M., Tang, D.P. et al. Improved sintering characteristics and microwave dielectric properties of CaLa4Ti4O15 ceramics with BiVO4 addition. J Mater Sci: Mater Electron 26, 2033–2038 (2015). https://doi.org/10.1007/s10854-014-2643-2

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  • DOI: https://doi.org/10.1007/s10854-014-2643-2

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