绝缘封装用碳化硅颗粒掺杂的非线性电导复合材料设计要素研究  

Design Features of Silicon Carbide-doped Nonlinear Conductive Composites for Insulating Packages

作　　者：孙凯兵 李欣[1] 梅云辉 SUN Kaibing;LI Xin;MEI Yunhui(School of Materials Science and Engineering,Tianjin University,Tianjin 300350;School of Electrical Engineering,Tiangong University,Tianjin 300387)

机构地区：[1]天津大学材料科学与工程学院,天津300350 [2]天津工业大学电气工程学院,天津300387

出　　处：《机械工程学报》2025年第2期97-105,共9页Journal of Mechanical Engineering

基　　金：国家自然科学基金(52177189,U1966212);天津市自然科学基金杰出青年(21JCJQJC00150);天津市自然科学基金面上(20JCYBJC00970)资助项目。

摘　　要：随着宽禁带(Wide band gap,WBG)功率半导体器件的不断发展,目前高电压功率器件的电压等级已经可以达到20 kV,这给高电压功率器件封装的电气可靠性带来了新的挑战。高电压功率器件封装内部“三相点”处极易发生电场集中从而引起局部放电导致器件封装绝缘失效。非线性电导涂层(Field-dependent conductivity,FDC)材料被认为是解决这一问题的关键。虽然非线性电导涂层材料已经成为高电压封装的重要解决方案,但是非线性电导涂层材料的制备方案对其性能的影响尚不明确。为了制备并设计出性能更为优异的非线性电导涂层材料,通过有限元仿真和试验,分析了非线性电导涂层材料制备的三大必备要素基体材料、掺杂颗粒、涂层厚度对非线性电导涂层材料成型性、耐温性、绝缘耐压性、涂层结合强度以及其热-机械应力等性能的影响。通过分析非线性涂层材料制备方案对材料几个重要性能的影响规律,本研究可为优异和高可靠性的非线性电导涂层材料的设计和制备提供指导和方案。With the continuous development of wide band gap(WBG)power semiconductor devices,the current voltage levels of high-voltage power devices have exceeded 20 kV,which brings new challenges to the insulation reliability of high-voltage power device packages.High-voltage power devices are susceptible to electric field concentration at the triple points,which can cause partial discharge leading to device insulation failure.Field-dependent conductivity(FDC)materials are considered to be the key to solve this problem.Although nonlinear conductive coatings have become an important solution for high-voltage packaging,the effect of the preparation method of nonlinear conductive coatings on their performance is not clear.In order to prepare and design nonlinear conductive coating materials with more excellent performance,in this paper,the effects of three main elements of non-linear conductive coating material design:matrix material,doping particles,and coating thickness on the properties of non-linear conductive coating material such as formability,temperature resistance,insulation and voltage resistance,coating bond strength,and its thermo-mechanical stress are briefly analyzed by finite element simulation and experimental comparison.By analyzing the laws of nonlinear coating material preparation schemes on several important properties of the materials,this study can provide guidance and solutions for the design and preparation of excellent and highly reliable nonlinear electroconductive coating materials.

关 键 词：电力电子 高电压 功率器件 绝缘 封装 

分 类 号：TM215[一般工业技术—材料科学与工程]