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Improved microwave dielectric properties of Mg4Nb2O9 ceramics with CaO–B2O3–SiO2 glass additions

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Abstract

The effects of CaO–B2O3–SiO2 (CBS) glass addition on the sintering temperature and dielectric properties of Mg4Nb2O9 ceramics have been investigated using X-ray diffraction, Scanning electron microscopy and Differential thermal analysis. The CBS glass can change to liquid phase at about 750 °C and a small amount of CBS glass addition to Mg4Nb2O9 ceramics can greatly decrease the sintering temperature to about 1,125 °C. It is revealed that the reduced sintering temperature is attributed to the formation of liquid phase. The major phases of the sample are Mg4Nb2O9 and MgNb2O6. The relationship between τ f values and the content of glass additions have the reverse change trends. The Mg4Nb2O9 ceramics with 2wt% glass addition sintered 1,125 °C exhibit good microwave dielectric properties: dielectric constant (ε r ) of 13 and Q·f value of 69,000 GHz.

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Acknowledgments

This work is partly supported by Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT) under Grant no. IRT1146

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Authors and Affiliations

  1. College of Materials Science and Engineering, Nanjing University of Technology, Nanjing, 210009, People’s Republic of China

    Haikui Zhu, Wei Shen, Yu Jin, Hongqing Zhou, Xiaodong Shen & Weijuan quan

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  1. Haikui Zhu
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  2. Wei Shen
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  3. Yu Jin
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  4. Hongqing Zhou
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  5. Xiaodong Shen
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  6. Weijuan quan
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Correspondence to Haikui Zhu.

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Zhu, H., Shen, W., Jin, Y. et al. Improved microwave dielectric properties of Mg4Nb2O9 ceramics with CaO–B2O3–SiO2 glass additions. J Mater Sci: Mater Electron 24, 3546–3550 (2013). https://doi.org/10.1007/s10854-013-1283-2

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  • DOI: https://doi.org/10.1007/s10854-013-1283-2

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