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The structure and properties of 0.95MgTiO3–0.05CaTiO3 ceramics doped with Co2O3

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Abstract

The effects of Co2O3 addition on the sintering behavior, phase formation, microstructure and microwave dielectric properties of 0.95MgTiO3–0.05CaTiO3 ceramics have been investigated. The structure and microstructure of the ceramics were investigated using X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy. These results suggested that Co2O3 addition not only contributes in lowering the sintering temperature but also inhibits the formation of second phase MgTi2O5 in 0.95MgTiO3–0.05CaTiO3 ceramics. Moreover, the decomposition of Co2O3 would inhibit the Ti4+ from being restored to Ti3+, which had the positive effect on the Q × f value. A fine combination of microwave dielectric properties (ε r = 20.48, Q × f = 76,485 GHz, τ f  = 2.43 ppm/°C) was achieved for 0.95MgTiO3–0.05CaTiO3–0.01Co2O3 ceramics sintered at 1300 °C for 4 h, which satisfied microwave applications in resonators, filters and antenna substrates.

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Authors and Affiliations

  1. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, China

    Hao Li, Bin Tang, Xuan Li, Zhenjun Qing, Yingxiang Li, Han Yang, Qiang Wang & Shuren Zhang

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  1. Hao Li
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  2. Bin Tang
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  3. Xuan Li
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  4. Zhenjun Qing
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  5. Yingxiang Li
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  7. Qiang Wang
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  8. Shuren Zhang
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Correspondence to Hao Li or Bin Tang.

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Li, H., Tang, B., Li, X. et al. The structure and properties of 0.95MgTiO3–0.05CaTiO3 ceramics doped with Co2O3 . J Mater Sci 49, 5850–5855 (2014). https://doi.org/10.1007/s10853-014-8294-0

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  • DOI: https://doi.org/10.1007/s10853-014-8294-0

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