Electrical properties of polyethylene highly filled with carbon

被引:19
作者
Modine, FA
Duggal, AR
Robinson, DN
Churnetski, EL
Bartkowiak, M
Mahan, GD
Levinson, LM
机构
[1] GE CO,CORP RES & DEV,SCHENECTADY,NY 12301
[2] OAK RIDGE Y-12 PLANT,DEV DIV,OAK RIDGE,TN 37831
[3] UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996
基金
美国能源部;
关键词
D O I
10.1557/JMR.1996.0365
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Carbon-filled polyethylene composites were fabricated and tested to establish the practical lower limit of their electrical resistivity at room temperature and to investigate the trade-offs between low resistivity and the magnitude of the resistance anomaly (i.e., a large positive temperature coefficient of resistivity) that appears when such composites are heated through the polyethylene crystalline melting transition. Carbon blacks with large particle size and low surface area provided low-resistivity composites having large resistance anomalies. The largest resistance anomalies were found in composites that were well mixed, but the room-temperature resistivity also increased in composites that were cycled repetitively through the crystalline-melting transition. A mixture of carbon blacks of two different sizes provided a lower resistance than was found in a material with the same fill of only the coarser black. By controlling the composition and the processing, composites were made with room-temperature resistivities lower than 0.2 ohm cm and resistance changes of at least 2 orders of magnitude. A resistance change of as much as 5 orders of magnitude was obtained for composites with room-temperature resistivities of only 1 ohm cm.
引用
收藏
页码:2889 / 2894
页数:6
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