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Effects of sintering time on crystal structure, dielectric properties and conductivity of (Ca0.8Sr0.2)ZrO3 ceramics

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Abstract

(Ca0.8Sr0.2)ZrO3 ceramics were prepared using solid-state reaction process, which were sintered at 1,480 °C for different sintering time (2, 4, 6, 8, 10, 12 h, respectively), their structures were characterized by X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy and Raman spectroscopy. Rietveld refinement for the (Ca0.8Sr0.2)ZrO3 sintered for 10 h was carried out by powder XRD at room temperature and it crystallizes in orthorhombic space group Pnma [a = 5.77341(4) Å, b = 8.05569(6) Å, c = 5.63318(4) Å and V = 261.9920(30) Å3, Z = 4]. The (Ca0.8Sr0.2)ZrO3 ceramics sintered at 1,480 °C for 2–12 h possessed a dielectric constant (ε r) of 23.6–27.9, a quality factor (Q × f) of 2,160–21,460 GHz and a temperature coefficient of resonant frequency (τ f ) from −14 to +13.6 ppm/°C. The Arrhenius plot of the dc electrical conductivity changed significantly with increasing sintering time.

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Acknowledgments

This work was supported by the National Natural Science Foundation (51172187), the SPDRF (20116102130002, 20116102120016) and 111 Program (B08040) of MOE, and Xi’an Science and Technology Foundation (XBCL-1-08, CX12174), and Shaanxi Province Science Foundation (2013KW12-02), and the NPU Fundamental Research Foundation (NPU-FRF-JC201232) of China.

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  1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, 710072, People’s Republic of China

    Weina Chen, Huiqing Fan, Changbai Long & Shenhui Lei

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  1. Weina Chen
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  2. Huiqing Fan
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  4. Shenhui Lei
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Correspondence to Huiqing Fan.

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Chen, W., Fan, H., Long, C. et al. Effects of sintering time on crystal structure, dielectric properties and conductivity of (Ca0.8Sr0.2)ZrO3 ceramics. J Mater Sci: Mater Electron 25, 1505–1511 (2014). https://doi.org/10.1007/s10854-014-1760-2

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  • DOI: https://doi.org/10.1007/s10854-014-1760-2

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