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Microstructure and dielectric properties of glass/Al2O3 composites with various low softening point borosilicate glasses

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Abstract

The effects of various low softening point borosilicate glasses on both the sintering behavior and dielectric properties of glass/Al2O3 composites were investigated by FTIR, DSC, XRD, SEM and EDS. Results show that the addition of alkali oxides and PbO can decrease the glass softening temperature. While, the addition of Al2O3 and more SiO2 content in the glass can increase the continuity of glass network and further increase the glass softening temperature of samples. Glass with lower softening temperature has more time to flow to finish the densification of samples, and that can contribute to get better sintered composites. By contrast, CaO–PbO–B2O3–SiO2–Na2O–K2O glass/Al2O3 composites sintered at 875 °C for 15 min exhibit better properties of a bulk density of 3.06 g/cm3, a porosity of 0.17 %, a λ value of 2.47 W/m K, a ε r value of 8.05 and a tan δ value of 8.8 × 10−4 at 10 MHz.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Nanjing University of Technology, Nanjing, 210009, China

    Ming Liu, Hongqing Zhou, Haikui Zhu & Jianxin Zhao

  2. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering, Nanjing University of Technology, Nanjing, 210009, China

    Hongqing Zhou

  3. State Key Laboratory of New Ceramic and Fine Processing, Tsinghua University, Beijing, 100084, China

    Zhenxing Yue

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  1. Ming Liu
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  2. Hongqing Zhou
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  3. Haikui Zhu
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Correspondence to Hongqing Zhou.

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Liu, M., Zhou, H., Zhu, H. et al. Microstructure and dielectric properties of glass/Al2O3 composites with various low softening point borosilicate glasses. J Mater Sci: Mater Electron 23, 2130–2139 (2012). https://doi.org/10.1007/s10854-012-0719-4

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  • DOI: https://doi.org/10.1007/s10854-012-0719-4

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