铝氧簇合物对聚合物薄膜电容器介电性能的影响  

The effect of aluminum oxo clusters on the dielectric properties of polymer film capacitors

作　　者：王国平 WANG Guoping(Fujian Guoguang Xin Ye Science&Technology,Fujian 350000,China)

机构地区：[1]福建国光新业科技股份有限公司,福建350000

出　　处：《功能材料与器件学报》2024年第6期330-335,共6页Journal of Functional Materials and Devices

摘　　要：电容器是现代电子设备的核心组件之一,其中介电层的性能对电容器的整体表现至关重要。填料掺杂量的增加通常会提高聚合物基复合电介质的介电常数,但过高的掺杂会导致界面极化和团聚,从而加剧介电损耗,导致高频电场下电容迅速降低。本研究采用含有高极性氨基异烟酸的AlOC-58NC作为聚合物掺杂剂,考察了其掺杂量对薄膜电容器介电性能的影响。结果显示,随着AlOC-58NC掺杂量的增加,薄膜电容逐渐增大,增幅可达2.7倍(25 Hz)。AlOC-58NC的巨型分子尺寸(约2.5 nm)提供了更强的极化作用和介电响应,使高频下薄膜电容相对于低频的下降幅度最低仅为23.6%,且介电损耗维持在较低水平(D<0.1)。本研究成功突破了介电常数与损耗之间的固有平衡,为设计聚合物复合介电材料提供了新的思路。Capacitor is one of the essential components in modern electronic devices,with the performance of the dielectric layer being critical to overall functionality.Increasing the doping of filler usually enhances the dielectric constant of polymer-based composite dielectrics;however,excessive doping can lead to interfacial polarization and agglomeration,resulting in increased dielectric losses and rapid reduction of capacitance under high-frequency electric fields.In this study,AlOC-58NC containing highly polar amino isonicotinate was used as a polymer dopant,and its effect on the dielectric performance of film capacitors was investigated.The results show that as the doping amount of AlOC-58NC increases,the capacitance of the film gradually rises,with a magnitude of increase of up to 2.7times(25 Hz).The large molecular size of AlOC-58NC(approximately 2.5 nm)contributes to stronger polarization and dielectric response,resulting in a minimal decrease of the capacitance at high frequency of only 23.6%as compared with that at low frequency and maintaining dielectric losses at a low level(D<0.1).This study successfully breaks the inherent balance between dielectric constant and loss,providing a novel approach for the design of polymer composite dielectric materials.

关 键 词：聚合物纳米复合材料 铝氧簇合物 薄膜电容器 介电性能 PMMA 

分 类 号：TM533[电气工程—电器]