期刊
JOURNAL OF ELECTRONIC MATERIALS
卷 45, 期 11, 页码 5974-5984出版社
SPRINGER
DOI: 10.1007/s11664-016-4834-5
关键词
Particle size distribution; dielectric properties; thermal conductivity; polymeric composites
资金
- National Science Foundation of China [51577154, 51073180]
- Shaanxi Provincial Natural Science Foundation of China [2016JM5014]
- Scientific Research Program - Shaanxi Provincial Education Commission [14JK1485]
- Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology [JZK201301]
- Foundation for Key Program of Ministry of Education, China [212175]
Three kinds of hybrid aluminum (Al) particles with binary particle size distribution, i.e., [2 mu m/50 mu m], [2 mu m/18 mu m] and [18 mu m/50 mu m], were added in epoxy (EP) to prepare hybrid Al/EP composites with enhanced dielectric properties and thermal conductivity for embedded capacitor applications. The dielectric permittivity, dissipation factor, and thermal conductivity of three types of hybrid Al/EP composites were investigated as a function of relative volume fraction of smaller-size Al of hybrid Al particles (V (s)) at a total filler content of 60 wt.%, respectively. The results indicate that dielectric permittivity and thermal conductivity of the hybrid Al/EP mainly depend on two factors, such as the type of hybrid filler and the V (s). The maximum dielectric permittivity of 48 appears at V (s) = V (18 mu m)/V ((18 mu m+50 mu m)) = 35%. While, the above two factors have a negligible influence on the dissipation factor, which is as low as 0.022. The highest thermal conductivity of 1.28 W/m K is obtained at V (s) = V (18 mu m)/V ((18 mu m+50 mu m)) = 50%. The maximum thermal conductivity for three hybrid systems shifts towards lower V (s) with decreasing the size ratio of a larger Al to a smaller one.
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