CICC型Bi-2212超导磁体绝缘纤维预处理方法研究  

Research on pretreatment method of insulating fiber of CICC Bi-2212 superconducting magnet

作　　者：孙静 刘志宏[1] 陈文革[3] 罗歆[4] 闫朝辉 SUN Jing;LIU Zhi-hong;CHEN Wen-ge;LUO Xin;YAN Zhao-hui(Institute of Plasma Physics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031;University of Science and Technology of China,Hefei 230026;High Magnetic Field Laboratory,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031;Hefei Juneng Electro Physics High-tech Development Co.,Ltd,Hefei 230031)

机构地区：[1]中国科学院合肥物质科学研究院等离子体物理研究所,合肥230031 [2]中国科学技术大学,合肥230026 [3]中国科学院合肥物质科学研究院强磁场科学中心,合肥230031 [4]合肥聚能电物理高技术开发有限公司,合肥230031

出　　处：《核聚变与等离子体物理》2023年第3期306-311,共6页Nuclear Fusion and Plasma Physics

基　　金：中国科学院合肥大科学中心重点研发项目(2019HSC-KPRD002);中国科学院青年促进会(2019433);安徽省自然科学基金(1808085ME110);安徽省先进复合材料设计与应用工程研究中心自主创新专项(IMIKF2022003)。

摘　　要：选择成分均为72%γAl_(2)O_(3)+28%SiO_(2)的氧化铝纤维制品作为Bi-2212超导磁体绝缘纤维材料并进行空气热处理除碳。采用强度测试、SEM、TG-DSC等测试手段,对三种氧化铝纤维制品(宽25mm/厚0.2mm氧化铝纤维带A、宽25mm/厚0.35mm氧化铝纤维带B和200tex/3股/捻度80氧化铝纤维束C)的热失重、纤维表面形貌、纤维强度进行分析表征。结果表明,其耐温性好,热失重过程并未发现晶相转变的吸放热峰。纤维经过空气热处理后,表面浸润剂氧化挥发,纤维裸露,无缺陷暴露,直径变化不明显,强度下降不超过25%,绝缘性能提高。分析结果表明,通过600℃、2h空气热处理可以有效提高氧化铝纤维绝缘性能。Alumina fiber products with 72%γAl_(2)O_(3)+28%SiO_(2)were selected as insulating fiber materials of Bi-2212 superconducting magnet,and air heat treatment was carried out for carbon removal.The thermal weight loss,fiber surface morphology,and fiber strength of the three kinds of fiber materials,i.e.alumina fiber ribbon A with 25mm width and 0.2mm thickness,alumina fiber ribbon B with 25mm width and 0.35mm thickness and alumina fiber bundle C with 200tex,3 strands and 80 twist,were analyzed and characterized by means of strength tests,SEM and TG-DSC.The results show that they have good temperature resistance,and no heat absorption or exothermic peak of crystal phase transformation is found during the thermogravimetric process.After air heat treatment,the surface sizing agent is oxidized and volatilized,the fiber is exposed without defects,the diameter change is not obvious,the strength drop is not more than 25%,and the insulation performance is improved.The analysis results show that the insulation performance of alumina fiber can be effectively improved by air heat treatment at 600℃lasting 2 hours.

关 键 词：Bi-2212超导磁体绝缘 氧化铝纤维 空气热处理 除碳 

分 类 号：TL627[核科学技术—核技术及应用]