【摘 要】
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Nanocomposites based on modified BaTiO3-Dy2O3 nanoparticles filled poly (vinylidene fluoride) polymer have been prepared.Comparison of two different dispersion mediums (ethanol and isopropanol) in sol
【机 构】
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Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
【出 处】
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2014中国溶胶-凝胶学术研讨会暨国际论坛
论文部分内容阅读
Nanocomposites based on modified BaTiO3-Dy2O3 nanoparticles filled poly (vinylidene fluoride) polymer have been prepared.Comparison of two different dispersion mediums (ethanol and isopropanol) in solution process and their effects on the dielectric behavior of nanocomposites were investigated systematically.The results indicated that dispersion mediums can influence the adsorption actions between nanoparticles and poly (vinylidene fluoride) polymer in solution.With isopropanol as the dispersed medium,homogenous BaTiO3-Dy2O3/PVDF nanocomposites of suitable BaTiO3-Dy2O3/PVDF volume fraction ratio could be prepared and gain higher dielectric permittivity and lower dielectric loss and conductivity in the frequency range of 100 Hz-1 MHz compared with that using ethanol as dispersion medium.Also, introduction of Dy2O3 dopants by co-precipitation is beneficial for the enhancement of dielectric properties.Isopropanol dispersed composites with 10 vol % BaTiO3-Dy2O3 nanoparticles exhibited dielectric permittivity of~20, low conductivity of 6.6× 10-10 S· m-1 and loss tangents of 0.06 at 1 KHZ.
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