Enhanced high thermal conductivity and low permittivity of polyimide based composites by core-shell Ag@SiO2 nanoparticle fillers

被引:67
|
作者
Zhou, Yongcun [1 ,2 ]
Wang, Lu [1 ,2 ]
Zhang, Hu [3 ]
Bai, Yuanyuan [1 ,2 ]
Niu, Yujuan [1 ]
Wang, Hong [1 ,2 ]
机构
[1] Xi An Jiao Tong Univ, Elect Mat Res Lab, Key Lab, Minist Educ, Xian 710049, Peoples R China
[2] Xi An Jiao Tong Univ, Int Ctr Dielect Res, Xian 710049, Peoples R China
[3] Xi An Jiao Tong Univ, Key Lab Thermal Fluid Sci & Engn, Minist Educ, Xian 710049, Peoples R China
基金
美国国家科学基金会;
关键词
ALUMINUM-NITRIDE; FLUORESCENCE;
D O I
10.1063/1.4733324
中图分类号
O59 [应用物理学];
学科分类号
摘要
A kind of polymer based composites was prepared by embedding the fillers of core-shell Ag@SiO2 nanoparticles into the polyimide (PI) matrix. The obtained Ag@SiO2/PI (50% vf of fillers) composites show remarkably improved high thermal conductivity and low relative permittivity. The maximum value of the thermal conductivity of composites is 7.88W/(mK) and the relative permittivity and dielectric loss are about 11.7 and 0.015 at 1MHz, respectively. Compared with self-passivated nanometer Al* particles composites, core-shell Ag@SiO2 nano-composite is beneficial to increase the thermal conductivity and reduce the permittivity of the composites. The relative mechanism was studied and discussed. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4733324]
引用
收藏
页数:4
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