纳米Ag/PAM/EVA复合材料的制备及介电特性  

Preparation and Study on Dielectric Properties of Nano-Ag/PAM/EVA Composite

作　　者：冯军强[1] 徐曼[1] 曹晓珑[1] 

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049

出　　处：《稀有金属材料与工程》2006年第1期85-88,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助(50277029)

摘　　要：利用γ射线辐照制备出均匀分布在PAM中的银粒子,直径约10nm。制备出的复合物再通过物理混合的方法与EVA复合,得到稳定的纳米Ag/PAM/EVA复合材料。结果表明:纳米银复合材料具有较高的电阻率和击穿场强,较低的tgδ和较高的介电常数。这种纳米粒子的新颖特性可以用库仑阻塞机理解释。By using γ irradiation, nano-Ag about 10nm can be prepared and distributed uniformly in PAM. The composites above are physically mixed with EVA, then forming stable Ag/PAM/EVA composites. By analyzing their dielectric properties, the results show that nano-Ag composites have higher resistivity and strength of the breakdown electrical field, lower tgδ, and a higher dielectr/c constant. The novel properties of nano-particles can be explained by the mechanics of Coulomb blockade.

关 键 词：纳米AG 库仑阻塞效应 复合材料 介电性能 

分 类 号：TB383.1[一般工业技术—材料科学与工程]