陶瓷封装浇注料在高温电磁线圈上的应用  

Application of Ceramic Encapsulated Castable in High-Temperature Electromagnetic Coils

作　　者：谢历 XIE Li(State Key Laboratory of Special Cables,Shanghai Electric Cable Research Institute Co.,Ltd.,Shanghai 200093,China)

机构地区：[1]上海电缆研究所有限公司,特种电缆技术国家重点实验室,上海200093

出　　处：《机械工程材料》2025年第3期88-93,共6页Materials For Mechanical Engineering

摘　　要：以纳米氧化铝和少量纳米二氧化硅为主要原料,通过纳米颗粒表面改性工艺制备陶瓷封装浇注料,研究了陶瓷封装浇注料的结构、热稳定性能和封装性能;采用该陶瓷封装浇注料对电磁线与陶瓷骨架进行封装,并在550℃下进行煅烧,研究了封装电磁线圈的绝缘性能和耐电压性能。结果表明:800℃高温煅烧后陶瓷封装浇注料的溶剂挥发,有机分散剂和黏结剂分解,而主体成分纳米氧化铝和二氧化硅无机材料结构基本未发生变化,陶瓷封装浇注料具有较高的耐温等级;550℃煅烧后陶瓷封装浇注料与电磁线石英纤维和陶瓷骨架紧密结合,从而形成完整的封装结构;陶瓷封装浇注料封装的电磁线圈的常温耐电压超过2000 V,在550℃下老化100 h后的绝缘电阻率为8.5×10^(8)Ω·m,封装电磁线圈表现出良好的耐电压性能和绝缘性能。With nano alumina and a small amount of nano silica as the main raw materials,the ceramic encapsulated castable was prepared by nano particle surface modification process.The structure,thermal stability and encapsulation properties of the ceramic encapsulated castable were studied.The electromagnetic wire and ceramic skeleton were encapsulated with the ceramic encapsulated castable and were calcined at 550℃.The insulation properties and voltage resistance of the encapsulated electromagnetic coil were studied.The results show that after calcination at 800℃,the solvent in the ceramic encapsulated castable volatilized,the organic dispersant and the binder decomposed,and the structure of the main component including nano alumina and silica inorganic materials basically did not change;the ceramic encapsulated castable had a high temperature resistance grade.After calcination at 550℃,the ceramic encapsulated castable was closely combined with the quartz fiber of electromagnetic wire and with the ceramic skeleton to form a complete packaging structure.The electromagnetic coil with ceramic encapsulated castable could withstand the voltage of more than 2000 V at room temperature,and the insulation resistivity after aging at 550℃for 100 h was 8.5×10^(8)Ω·m;the encapsulated electromagnetic coil showed good voltage resistance and insulation performance.

关 键 词：陶瓷封装浇注料 电磁线圈 陶瓷骨架 热稳定性 绝缘性能 

分 类 号：TM212[一般工业技术—材料科学与工程]