Ni-coated CaCu3Ti4O12/low density polyethylene composite material with ultra-high dielectric permittivity

作者：Gao, L.; Wang, X.; Chen, Y.; Chi, Q. G.^*; Lei, Q. Q.

来源：AIP Advances, 2015, 5(8): 087183.

DOI：10.1063/1.4930075

• POLYMER COMPOSITES
• HYBRID FILM
• NANOCOMPOSITES
• NANOPARTICLES
• BATIO3
• CONSTANT
• CERAMICS

We report a novel low-density polyethylene (LDPE) composite filled with nickel-coated CaCu3Ti4O12 ceramic (denoted as CCTO@Ni), prepared by a melt mixing technique, and its prominent dielectric characteristics. The effects of magnetic field treatment on the dielectric properties of CCTO@Ni/LDPE composite films with a low filler concentration of 10 vol.% were investigated. Our results show that the dielectric permittivity, loss tangent, and conductivity of the LDPE composite films initially improved and then decreased with increasing treatment time under the applied magnetic field. Magnetic field treatment for 60 min led to an ultra-high dielectric permittivity value of 1.57 x 10(4), four orders of magnitude higher than that of the pure LDPE material. Our results indicate that the magnetic treatment may have induced a percolation effect and enhanced the interfacial polarization of the CCTO@Ni/LDPE composite, resulting in the observed changes in its dielectric properties.

• 出版日期2015-8
• 单位绥化学院; 电子科技大学; 哈尔滨学院