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Effects of ZrO2–ZnO on the sintering behavior and microwave dielectric properties of 0.65CaTiO3–0.35SmAlO3 ceramics

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Abstract

The 0.65CaTiO3–0.35SmAlO3 (CTSA) ceramics were synthesized by the conventional solid-state reaction technique. The effects of ZrO2–ZnO additives on the phase compositions, densification, sintering temperature and microwave dielectric properties were investigated. It has been found that a perovskite phase is the main phase and a second phase CaZrTi2O7 appeared as ZrO2 content increasing to 1 wt % in CTSA ceramics. The appropriate ZrO2 and ZnO additions could not only effectively lower the sintering temperature of CTSA ceramics to 1340 °C, but also promote the densification and microwave dielectric properties. But excessive additives deteriorated the microstructures and comprehensive properties of samples. Typically, excellent microwave dielectric properties: ε r  = 44.65, Q × f = 38,600 GHz (at 5.0 GHz) and τ f  = −8.36 ppm/°C were obtained for CTSA ceramics sintered at 1340 °C doped with 0.5 wt% ZrO2 and 1 wt% ZnO.

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Acknowledgments

The authors are grateful to the support of the fund by the Practice Innovation Program (2015) for University Graduate Students of Jiangsu Province (No. SJZZ15_0095), the Priority Academic Program Development of Jiangsu Higher Education Institution (PAPD), Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites and the Program for Innovative Research Team in University of Ministry of Education of China (No. IRT_15R35).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Nanjing Tech University, No.5 Xinmofan Road, 210009, Nanjing, China

    Lisong Hu, Hongqing Zhou, Qinglei Sun, Luchao Ren, Xianfu Luo, Yongkang Hu & Yunsheng Xia

  2. Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, 210009, Nanjing, China

    Lisong Hu, Hongqing Zhou, Qinglei Sun, Luchao Ren, Xianfu Luo, Yongkang Hu & Yunsheng Xia

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  1. Lisong Hu
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  2. Hongqing Zhou
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Correspondence to Hongqing Zhou.

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Hu, L., Zhou, H., Sun, Q. et al. Effects of ZrO2–ZnO on the sintering behavior and microwave dielectric properties of 0.65CaTiO3–0.35SmAlO3 ceramics. J Mater Sci: Mater Electron 27, 12834–12839 (2016). https://doi.org/10.1007/s10854-016-5417-1

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  • DOI: https://doi.org/10.1007/s10854-016-5417-1

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