羰基铁粉/银核-壳粒子及其复合材料的制备与电磁特性  

Preparation and Electromagnetic Properties of Carbonyl Iron Powders/Silver Core-shell Particles and Their Composite Rubber Materials

作　　者：王一龙[1,2] 李维[1] 章桥新[1] 王维[1] 官建国[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室 [2]武汉理工大学理学院化学系,武汉430070

出　　处：《高等学校化学学报》2010年第10期1934-1939,共6页Chemical Journal of Chinese Universities

基　　金：国家"八六三"计划项目(批准号:2006AA03Z461);国防基础科研项目(批准号:A1420080185)资助

摘　　要：运用液相化学还原银技术,制备了羰基铁粉/银核-壳复合粒子;以该复合粒子为屏蔽填料,制备了一种宽频、高效的新型电磁屏蔽橡胶材料.分析了该屏蔽填料的表面形貌和组成,研究了其电磁特性对电磁屏蔽橡胶材料屏蔽效能的影响规律.结果表明,具有完整核壳结构的羰基铁粉/银复合粒子兼具优异的磁性能和高导电率,用其组成的电磁屏蔽橡胶材料对电磁波能同时产生较强的吸收损耗和反射损耗,屏蔽效能(SE)优于传统的屏蔽橡胶材料.Carbonyl iron powders/silver core-shell composite particles were prepared by liquid chemical reduction technology.Using carbonyl iron powders/silver core-shell composite particles as shielding filler,a novel kind of wide-frequency and high-performance electromagnetic shielding rubber materials were prepared.The morphology and composition of electromagnetic shielding fillers were analyzed.The effect of electromagnetic properties of shielding fillers on shielding effectiveness of electromagnetic shielding rubber materials was investigated.The results show that carbonyl iron powders/silver composite particles with intact core-shell structure have excellent high electric conductivity and magnetic properties.The electromagnetic shielding rubbers based on carbonyl iron powders/silver core-shell composite particles have excellent electromagnetic shielding effectiveness due to strong absorbing loss and reflecting loss.Compared with traditional shielding rubbers,conductive magnetic electromagnetic shielding rubber materials show better shielding effectiveness.

关 键 词：羰基铁粉/银核-壳复合粒子 电磁屏蔽 磁导率 屏蔽效能 

分 类 号：O614.81[理学—无机化学] O614.122[理学—化学]