有机硅-纳米氧化铝溶胶复合绝缘高温导线的研究

Study on organic silicon-nano alumina sol composite insulated high temperature wire

通过有机-无机复配技术,采用有机硅-纳米氧化铝溶胶涂覆石英纤维绕包层制备耐高温绝缘层。通过SEM、FTIR、XRD等表征技术对有机硅-纳米氧化铝溶胶涂层的微观形貌与结构进行分析,采用TG-DSC分析有机硅-纳米氧化铝溶胶复合绝缘漆的热稳定性能,并对高温导线进行常温与高温绝缘性能和击穿电压性能测试。结果表明:有机硅-纳米氧化铝溶胶复合绝缘漆具有良好的热稳定性,能够显著提升石英纤维绕包层的耐温等级,并且高温导线表现出良好的高温绝缘性和高耐电压性,在800℃时的电阻率大于1 MΩ·m,常温击穿电压超过2000 V,适用于航空、航天领域中的高温和高压等特殊环境。

By using organic-inorganic composite technology,the high temperature resistant insulation layer was prepared by coating quartz fiber wrap cladding with silicone nano alumina sol.The micro morphology and structure of the organic silicon-nano alumina sol coating were analyzed by SEM,FTIR,XRD and other characterization techniques.The thermal stability of the organic silicon-nano alumina sol composite insulating paint was analyzed by TG-DSC.The insulation performance and breakdown voltage performance of high-temperature wire were tested at room temperature and high temperature.The results show that the organic silicon-nano alumina sol composite insulating paint has good thermal stability,and it can significantly improve the temperature resistance level of the glass fiber wrap cladding.The high-temperature wire shows good high temperature insulation and high voltage resistance.At 800℃,the electrical resistance is greater than 1 MΩ·m,and the normal temperature breakdown voltage is greater than 2000 V.It is suitable for special environments such as high temperature and high voltage in the aviation and aerospace fields.