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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Ni@C/HDPE复合材料的制备及其正温度系数性能研究
DOI: 10.3724/SP.J.1105.2013.12395, PP. 1159-1164
Keywords: 喷雾燃烧,Ni@C,PTC性能
Abstract:
采用还原气氛喷雾燃烧法制备了具有核壳结构Ni@C纳米复合颗粒,并与HDPE共混挤出制备了聚合物基PTC导电复合材料,并且对其结构和性能进行了表征.结果表明,所制备的Ni@C复合纳米颗粒具有典型的核壳结构,其中,金属镍的核的粒径为30~50nm,碳包覆壳层的厚度约为2.9nm,热重分析结果表明Ni@C复合纳米颗粒的含碳量为3.4%,碳包覆层的存在阻止了金属镍颗粒的团聚;对Ni@C/HDPE复合材料的断面SEM和切片TEM分析结果表明复合颗粒在HDPE基体中分散性良好,复合材料的渗流阈值为10wt%,PTC强度为8个数量级.
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