摘要
本文通过正负常温、高温的电晕充电和热释电(TSD)电流谱的测量,对可溶性聚四氟乙烯(Teflon PFA)的突出驻极体特性进行了研究。确定了正负电晕充电的最佳充电温度。并利用初始上升法和峰值清洗术,对存在于该材料内不同能阱的活化能作出估算。从材料的分子结构出发,借助于比较开路和短路TSD电流谱,对PFALP型材料的极性进行了初步分析。估计出常温电晕充电后的PFA样品在150℃高温下脱阱载流子的平均渡越时间,分析和讨论了不同能阱的捕获电荷沿样品厚度方向的几何分布,进而对Teflon PFA和Teflon FEP两种驻极体材料的基本性质作了比较。
In the paper through the measurement of positive and negetive corona charging and TSD current spectra at normal and high temperatures, the outstanding electret features of Teflon PFA are studied and the optimum charging temperature of the positive and negative corona is determined. Also, by use of the initial rise method and the peak-cleaning technique, the activation energy of different energy traps in this material can be estimated. By means of the comparison between open-circuit and short-circuit TSD current spectra,the polarity of PFA LP type material is analyzed preliminarily,and the average transit time of the detrapping carriers on the PFA sample, at high temperature of 150℃ is estimated after the corona is charged at normal temperature, moreover, the geometric distribution of the charges captured in different energy traps along the thickness of the sample is analyzed, and so the bask properties of the materials of Teflon PFA and Teflon FEP electrets are finally compared.
出处
《电声技术》
北大核心
1991年第1期2-7,共6页
Audio Engineering
