Fabrication of BaTiO3/Epoxy Composites Exhibiting Large Dielectric Constant, Low Dielectric Loss and High Flexural Strength

Jinpeng Liu; Xiaoqiang You; Nan Chen; Guoping Du

doi:10.1007/s11595-019-2188-6

Journal of Wuhan University of Technology Materials Science Edition ›› 2020, Vol. 34 ›› Issue (6) : 1266 -1273. DOI: 10.1007/s11595-019-2188-6

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Fabrication of BaTiO₃/Epoxy Composites Exhibiting Large Dielectric Constant, Low Dielectric Loss and High Flexural Strength

Jinpeng Liu ¹
, Xiaoqiang You ¹
, Nan Chen ¹^,^{^c}
, Guoping Du ¹^,^{^d}

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Abstract

BaTiO₃/epoxy composites consisting of two three-dimensionally interpenetrating networks of BaTiO₃ and epoxy phases were prepared using a new approach. The BaTiO₃/epoxy composites exhibit a colossal dielectric constant, low dielectric loss and high flexural strength. In the BaTiO₃ networks, chemically bonded grain boundaries between neighboring BaTiO₃ grains were established, and they are responsible for the colossal dielectric constant and high flexural strength of the BaTiO₃/epoxy composites. Furthermore, unlike the conventional ceramic/polymer composites, this approach also makes high loadings of BaTiO₃ contents possible for the BaTiO₃/epoxy composites without compromising their high flexural strength.

Keywords

ceramic/polymer composite / BaTiO₃/epoxy / dielectric property / colossal dielectric constant

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Jinpeng Liu,Xiaoqiang You,Nan Chen,Guoping Du. Fabrication of BaTiO₃/Epoxy Composites Exhibiting Large Dielectric Constant, Low Dielectric Loss and High Flexural Strength. Journal of Wuhan University of Technology Materials Science Edition, 2020, 34(6): 1266-1273 DOI:10.1007/s11595-019-2188-6