可加工陶瓷电刷架绝缘性能增强技术研究  

Study on insulation performance enhancement technology for machinable ceramic brush holders

作　　者：李彦博 严思澄 胡银苹 LI Yanbo;YAN Sicheng;HU Yinping(Beijing Institute of Aerospace Control Devices,Beijing 100854,China;Capital University of Economics and Business,Beijing 100070,China)

机构地区：[1]北京航天控制仪器研究所,北京100854 [2]首都经济贸易大学,北京100070

出　　处：《绝缘材料》2024年第11期113-118,共6页Insulating Materials

摘　　要：为提高可加工陶瓷电刷架组件在高潮湿环境下的绝缘性能,在可加工陶瓷表面构建了不同类型有机硅烷膜层,并对其微观形貌结构、接触角、表面粘接强度以及吸湿率进行测试,研究了KH-560、KH-570以及含氟硅烷等膜层对环氧胶粘接强度以及吸湿性的影响,归纳出膜层增强可加工陶瓷电刷架抗潮湿性的作用机理。结果表明:KH-560有机硅烷在可加工陶瓷电刷架表面形成的膜层厚度为40μm左右,同时经KH-560偶联剂表面处理后的电刷架产品对水的接触角从9.2°提高到42.8°,吸湿率降低58.3%以上,憎水性显著提高,即使在相对湿度为90%的环境下,绝缘电阻仍能达到220 MΩ以上,表现出优异的绝缘性能,使其在高潮湿环境下的绝缘可靠性显著提升。To improve the insulating properties of machinable ceramic brush holders in high humidity environment,different types of organosilane film layers were formed on the surface of machinable ceramic,and their microstructure,contact angle,surface bonding strength,and moisture absorption rate were tested.The effects of the film layers containing KH-560,KH-570,and fluorosilane on the adhesion strength and moisture absorption of epoxy adhesive were studied.The mechanism of the films enhance the moisture resistance of machinable ceramic brush holder was concluded.The results show that the film layer thickness of KH-560 organosiliane on the surface of the machinable ceramic brush holder is about 40μm.At the same time,the water contact angle of the brush holder product treated by KH-560 coupling agent increases from 9.2°to 42.8°,the moisture absorption rate reduces by more than 58.3%,and the hydrophobicity increases significantly.Even in the environment with relative humidity of 90%,the insulation resistance can still reach more than 220 MΩ,showing excellent insulation performance,which makes its insulation reliability improve significantly in high humidity environment.

关 键 词：表面处理 可加工陶瓷 吸潮 绝缘可靠性 

分 类 号：TQ174[化学工程—陶瓷工业]