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Citation: Si-Chen WU, Yi-Ting GUO, Shu-Hang LIU, Zhen-Nan LIU, Fang-Jun SHI, Ning LI, Jie XU, Feng GAO. Fabrication and Dielectric Properties of Ba0.6Sr0.4TiO3/Poly(vinylidene fluoride)-Poly(methyl methacrylate) Composites[J]. Chinese Journal of Inorganic Chemistry, ;2022, 38(1): 119-126. doi: 10.11862/CJIC.2022.012 shu

Fabrication and Dielectric Properties of Ba0.6Sr0.4TiO3/Poly(vinylidene fluoride)-Poly(methyl methacrylate) Composites

  • 1.

    State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China

  • 2.

    Shandong Yuhui Electronic Technology Co., Ltd., Zibo, Shandong 255100, China

  • Corresponding author: Feng GAO, gaofeng@nwpu.edu.cn
  • Received Date: 6 August 2021
    Revised Date: 8 November 2021

Figures(7)

  • Ba0.6Sr0.4TiO3 (BST)/poly(vinylidene fluoride) (PVDF)-poly(methyl methacrylate) (PMMA) composite films were prepared by tape casting and hot pressing. The effects of PMMA content on the phase structure and electrical properties of the composites were studied. The results showed that the BST phase was uniformly dispersed in the polymer matrix. The interface between the two polymers is not clear, which is attributed to the good compatibility between PMMA and PVDF. With the increase of PMMA content, the dielectric constant of the composites is negatively correlated with the breakdown strength and dielectric tunability. BST/PVDF-PMMA15 composite with PMMA content (volume fraction) of 15% showed the best dielectric properties with the dielectric constant of 23.2, the dielectric loss of 0.07, the breakdown strength of 1 412 kV·cm-1, and the dielectric tunability was 26.2% under the DC bias of 550 kV·cm-1.
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