微晶白云母对环氧灌注胶电阻率和抗压强度的影响  

Effect of Microcrystal Muscovite on Resistivity and Compressive Strength of Insulating Pouring Sealant

作　　者：罗柯[1] 汪灵[1,2] 雷燕[1] 李自强[1] 

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059 [2]成都理工大学金刚石薄膜实验室,四川成都610059

出　　处：《矿物学报》2012年第3期403-408,共6页Acta Mineralogica Sinica

基　　金：国家自然科学基金(批准号:50974025);四川省应用基础研究基金(07JY029-029);国家公益性行业科研专项经费项目课题(201011005-5);国家教育部高等学校博士点基金(20095122110015);国家人事部留学人员科技活动择优基金(川人社函[2010]32号)

摘　　要：为了克服现有绝缘灌注胶用非金属矿物填料存在的不足,为新型绝缘灌注胶的制备与应用提供科学依据,采用PC68型数字高阻计和与之配套使用的适用于直径为Ф=18 mm的小块样品电阻率测试的自制小型电极实验装置,以及WE-100型液压万能试验机等,研究微晶白云母用量对E-51环氧树脂绝缘灌注胶电阻率和抗压强度的影响,并采用扫描电镜(SEM)对材料的微观组织结构进行了分析,结果表明:微晶白云母对绝缘灌注胶体积电阻率基本上没有不利影响,而对绝缘灌注胶表面电阻率有一定改善作用,当用量为40 phr时,其表面电阻率可达7.53×1014Ω;微晶白云母用量<100 phr时,绝缘灌注胶的抗压强度会随用量的增加而增大,而用量>100 phr时,抗压强度则迅速降低;从绝缘灌注胶绝缘性能、力学性能和胶液黏度等因素考虑,微晶白云母的优化用量为80 phr。In order to overcome the deficiency of non-metallic mineral used as filler in insulating pouring sealant,and to provide a scientific basis for preparation and application of a new type of insulating pouring sealant,the effect of micro-crystal muscovite on the resistivity and compressive strength of the insulating pouring sealant were studied by using PC68 digital high resistance meter and WE-100 hydraulic universal testing machine.Moreover,the microstructure of the materials was analyzed by using SEM.The results show that： the micro-crystal muscovite has no disadvantageous effects on the volume resistivity of insulating pouring sealant virtually,while it can improve the surface resistivity of insulating pouring sealant.When the amount of micro-crystal muscovite is 40 phr,its surface resistivity reaches up to 7.53×1014 Ω,and compressive strength increases while the amount of micro-crystalline muscovite is under 100 phr;on the contrary,it decreases rapidly when the amount of micro-crystalline muscovite exceeds 100 phr.The optimized amount of microcrystalline muscovite is 80 phr according to the insulating property,mechanical property,viscosity glue,and so on.

关 键 词：微晶白云母 绝缘灌注胶 电阻率 非金属矿物填料 矿物材料 

分 类 号：P578.959[天文地球—矿物学] P579[天文地球—地质学]