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Adjustable microwave dielectric properties of ZnO–TiO2–ZrO2–Nb2O5 composite ceramics via controlling the raw ZrO2 content and sintering temperature

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Abstract

A series of 2.5ZnO–(5−x)TiO2–xZrO2–2.5Nb2O5 (abbreviated as ZTZN, 0.2 ≤ x ≤ 0.4) composite ceramics were prepared by a solid state reaction method. The phase composition and microwave dielectric properties of the ceramics were investigated. X-ray diffraction patterns displayed the coexistence of ZnTiNb2O8 and Zn0.17Nb0.33Ti0.5O2 phases. With increasing the sintering temperature, the bulk density (ρ), permittivity (ε r ) and temperature coefficient of resonator frequency (τ f ) increased. With increasing the ZrO2 content, the ρ firstly increased and then decreased, Q × f value increased, ε r and τ f value decreased. Importantly, the τ f value of ZTZN ceramics (0.2 ≤ x ≤ 0.4) could be adjusted to near-zero. The 2.5ZnO–4.7TiO2–0.3ZrO2–2.5Nb2O5 ceramics sintered at 1075 °C exhibited the best comprehensive performances of Q × f = 30,155 GHz, ε r  = 44 and τ f  = 0.89 ppm/°C, indicating that they are candidates for microwave devices.

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Acknowledgements

This work was supported by Natural Science Foundation of China (Nos. 11464009, 61761015 and 11664008), Natural Science Foundation of Guangxi (Nos. 2017GXNSFFA198011, 2015GXNSFDA139033 and 2017GXNSFDA198027) and Research Start-up Funds Doctor of Guilin University of Technology (No. GUTQDJJ2017133).

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Authors and Affiliations

  1. Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi, Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, China

    Wendong Sun, Huanfu Zhou, Xianghu Tan, Kangguo Wang, Hong Ruan, Hailin Zhang, Xiaobin Liu & Xiuli Chen

  2. College of Information Science and Engineering, Guilin University of Technology, Guilin, 541004, China

    Xiaobin Liu

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  1. Wendong Sun
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Correspondence to Huanfu Zhou or Xiaobin Liu.

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Sun, W., Zhou, H., Tan, X. et al. Adjustable microwave dielectric properties of ZnO–TiO2–ZrO2–Nb2O5 composite ceramics via controlling the raw ZrO2 content and sintering temperature. J Mater Sci: Mater Electron 29, 12055–12060 (2018). https://doi.org/10.1007/s10854-018-9311-x

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