Abstract: The barium titanate powders containing niobium and cobalt (BTNC) was prepared by co-doping of niobium and cobalt oxide with barium titanate(BaTiO3,BT).The BTNC was modified with silane coupling agent (KH550) to obtain modified niobium and cobalt oxide with barium titanate (R-BTNC) powder.The BTNC/PVDF and composites were prepared by the method of solution blending with polyvinylidene fluoride,and the composites were characterized.Results showed that KH550 can effectively improve the dispersion of the fillers in the matrix and the compatibility with matrix,and the adding of BTNC increased the β phase with polarization effect in PVDF.The dielectric constant and loss of (R-BTNC) /PVDF filled with 50.0vol% R-BTNC at 102Hz was 79.4 and 0.0520.
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Zhai Yue, Xue Haiping, Qin Yanli, Dai Xiujuan, Xu Shihao, Yang Dandan. Influence of co-doping with niobium and cobalt oxide and modification with KH550 on dielectric property of BaTiO3/PVDF. New Chemical Materials, 2019, 47(6): 59-62.
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