Li Yuchao, Tjong Sie Chin
Department of Physics and Materials Science, City University of Hong Kong, Kowloon, Hong Kong.
J Nanosci Nanotechnol. 2011 Jun;11(6):5148-53. doi: 10.1166/jnn.2011.4153.
Poly(vinylidene fluoride) based composites filled with semiconducting beta silicon carbide (beta-SiC) nanoparticles were prepared by means of solution mixing method. The dielectric responses of PVDF/beta-SiC nanocomposites over a wide frequency range were investigated. The results showed that the permittivity of composites increases with increasing filler content. A large permittivity of 610 together with a low loss tangent of 1.0 was achieved in the PVDF/SiC 50 wt% system. The composites exhibit dielectric relaxation process in the tested frequency range and such relaxation can be well described by the Cole-Cole equation.
通过溶液混合法制备了填充有半导体β碳化硅（β-SiC）纳米颗粒的聚偏氟乙烯基复合材料。研究了PVDF/β-SiC纳米复合材料在很宽频率范围内的介电响应。结果表明，复合材料的介电常数随填料含量的增加而增大。在PVDF/SiC 50 wt%体系中实现了610的大介电常数和1.0的低损耗角正切。复合材料在测试频率范围内表现出介电弛豫过程，这种弛豫可以用Cole-Cole方程很好地描述。
