浸渍对石墨接地材料理化、电气性能的影响研究  

Impact of Impregnation on the Physicochemical and Electrical Properties of Graphite Grounding Materials

作　　者：张国锋 陈晓朋 陈彦青 陈四甫 务孔永 ZHANG Guo-feng;CHEN Xiao-peng;CHEN Yan-qing;CHEN Si-fu;WU Kong-yong(School of Civil Engineering and Architecture,Henan University,Kaifeng Henan 475004,China;Henan STAR Power Equipment Co.,Ltd.,Xuchang Henan 461500,China)

机构地区：[1]河南大学土木建筑学院,河南开封475004 [2]河南四达电力设备股份有限公司,河南许昌461500

出　　处：《当代化工》2023年第12期2799-2802,2807,共5页Contemporary Chemical Industry

基　　金：许昌市重大科技专项目(项目编号:20170115007)。

摘　　要：浸渍液是以磷酸、磷酸盐、硼酸盐为主要试剂,为改善输配电接地工程用柔性石墨接地材料抗高温氧化性能差、温度耐受性低等问题配制而成,通过高温灼烧和工频大电流短路的方法测量柔性石墨接地材料的氧化失重率、机械性能、电气性能。结果表明:浸渍处理后的柔性石墨接地材料,高温灼烧时长为1h,灼烧温度在700℃以下时,柔性石墨接地材料的氧化失重率降低90%,断裂负荷变化率、交直流电阻绝对变化率也均未超过DL/T 2095—2020要求的10%变化率限制,浸渍液在柔性石墨接地材料表面形成了抗氧化涂层,阻止了柔性石墨接地材料在高温下的氧化,使得其抗高温氧化性能显著提高。The impregnation solution was prepared with phosphoric acid,phosphate and borate as the main reagents,in order to improve the problems of poor high temperature oxidation resistance and low temperature tolerance of flexible graphite grounding materials for transmission and distribution grounding engineering,and the oxidative weight loss rate,mechanical properties and electrical properties of flexible graphite grounding materials were measured by high temperature burning and power frequency and high current short circuit.After impregnation treatment,when the flexible graphite grounding material was roasted at 700℃high temperature for 1 h,the oxidation loss rate of the flexible graphite grounding material was reduced by 90%,and the rate of change of fracture load and the absolute change rate of AC and DC resistance did not exceed the 10%change rate limit required by DL/T2095—2020.An anti-oxidation coating formed on the surface of the flexible graphite grounding material by the impregnating solution,which prevented the oxidation of the flexible graphite grounding material at high temperature,and significantly improved its high temperature oxidation resistance.

关 键 词：柔性石墨线 浸渍 氧化失重率 防雷接地 

分 类 号：TQ327[化学工程—合成树脂塑料工业]