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Effect of TiO2 content on the microwave dielectric properties of BaO-ZnO-TiO2 ceramics

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Abstract

In this paper, the BaO-0.6ZnO-xTiO2 ceramics with x=2.5–2.8 have been prepared by the conventional solid-state ceramic route for the purpose of investigating the effect of TiO2 content on the microwave dielectric properties. The XRD results showed that the main crystal phase in the sintered ceramics was Ba4ZnTi11O27 and that the additional phases: Ba2ZnTi5O13 and BaZn2.03Ti3.93O10.89 were presented, depending on the TiO2 contents. The SEM photographs of the samples sintered at 1200°C for 2 h showed a high compact microstructure. Because the phase composition of ceramics samples was changed with TiO2 content, the dielectric constant (ɛ r ), the quality factor values (Q×f) and the temperature coefficient of resonant frequency (τ f ) were first increased, continuously came up to a peak value, and then let up. It was lucky to find that the sample with composition BaO-0.6ZnO-2.7TiO2 had both the maximum dielectric constant ε r =36.1 and the maximum Q×f value of 29320 GHz, and more importantly, it had an acceptable temperature coefficient of resonant frequency τ f =10.45 ppm/°C.

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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

    ShengQuan Yu, MingZhu Long, Bin Tang, ShuRen Zhang & XiaoHua Zhou

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  1. ShengQuan Yu
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  2. MingZhu Long
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  3. Bin Tang
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  4. ShuRen Zhang
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  5. XiaoHua Zhou
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Correspondence to ShengQuan Yu.

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Yu, S., Long, M., Tang, B. et al. Effect of TiO2 content on the microwave dielectric properties of BaO-ZnO-TiO2 ceramics. Sci. China Technol. Sci. 54, 1532–1536 (2011). https://doi.org/10.1007/s11431-011-4391-3

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  • DOI: https://doi.org/10.1007/s11431-011-4391-3

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