Enhanced dielectric properties of low density polyethylene with bismuth sulfide used as inorganic filler

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• 作者：Yuan Deng ; Na Li ; Yao Wang ; Zhiwei Zhang ; Yu Dang ; Jiayou Liang
• 关键词：Composite materials ; Dielectrics ; Mechanical properties
• 刊名：Materials Letters
• 出版年：2010
• 出版时间：28 February 2010
• 年：2010
• 卷：64
• 期：4
• 页码：528-530
• 全文大小：571 K

文摘

A series of Bi₂S₃/LDPE composites, with low density polyethylene (LDPE) as matrix and bismuth sulfide as filler, are fabricated by a simple process. The microstructure, dielectric properties and tensile strength of the composites have been studied. The variation of dielectric properties of the Bi₂S₃/LDPE composites with the volume fraction of Bi₂S₃, frequency and temperature is discussed. The composites have significantly high dielectric constants and good thermal stability, with a quite low percolation threshold. The addition of low content of Bi₂S₃ significantly improves the dielectric constant of polymer matrix from 3 to above 60 at 100 Hz.