改性炭黑对碳/陶瓷复合材料电性能的影响  

Effects of Modified Carbon Black on Electrical Properties of Carbon/Ceramic Composites

作　　者：关越 丁冬海 高凯强 肖国庆[1] 侯星 景文鹏 丁宇东 史晓琪 Guan Yue;Ding Donghai;Gao Kaiqiang;Xiao Guoqing;Hou Xing;Jing Wenpeng;Ding Yudong;Shi Xiaoqi(College of materials Science and Engineering,Xi’an University of Architecture and Technology,Xi’an,Shaanxi 710055;Xi’an Xd High Voltage Porcelain Insulator Co.,Ltd.,Xi’an,Shaanxi 710077)

机构地区：[1]西安建筑科技大学材料科学与工程学院,陕西西安710055 [2]西安西电高压电瓷有限责任公司,陕西西安710077

出　　处：《非金属矿》2023年第2期43-46,52,共5页Non-Metallic Mines

基　　金：陕西省重点研发计划(2023-GHZD-51)。

摘　　要：以炭黑为导电填料,与铝矾土、高岭土、钾长石等原料进行湿法球磨混合,经等静压成型、还原气氛烧结制备碳/陶瓷复合材料。为改善炭黑的分散性,采用硅烷偶联剂对纳米炭黑进行表面改性,研究了硅烷偶联剂含量对炭黑润湿角、zeta电位、沉降率及复合材料电性能的影响。结果表明,随着硅烷偶联剂添加量的增加,炭黑的润湿角减小,沉降率先减小后增大,复合材料的电阻率先降低后升高。当硅烷偶联剂与炭黑质量比为0.06时,炭黑改性效果最显著,润湿角为39.5°,降低31.9%;沉降率最低,为1.07%;zeta电位的绝对值最大,为25.33 mV,提高了1.5倍;复合材料电阻率最低,为297.4Ω·cm。The carbon/ceramic composites were prepared by wet ball mixing of carbon black(conductive filler),bauxite,kaolinite,potassium feldspar and other ceramic raw materials,isostatic pressing and sintering in a reducing atmosphere.The silane coupling agent was used to modify the surface of carbon black with the purpose of improving its water dispersibility.The effects of silane coupling agent content on the wetting angle,zeta potential,sedimentation rate of the modified nano carbon black as well as the electrical properties of the prepared composites were investigated.The results show that:with the increase of silane coupling agent content,the wetting angle of carbon black decreases;the sedimentation rate of nano carbon black decreases first and then increases;the resistivity of carbon/ceramic composites decrease first and then increase,When the mass ratio of silane coupling agent to carbon black is 0.06,the modification effect of carbon black is the most significant,and the wetting angle is 39.5°,which is 31.9%lower than that of the initial carbon black;the sedimentation rate of the modified nano carbon black is the lowest(1.07%);the zeta potential absolute value of the modified nano carbon black is the highest(25.33 mV),which is 1.5 times higher than that of the initial carbon black;the composites obtain the lowest resistivity(297.4Ω·cm).

关 键 词：碳/陶瓷复合材料 硅烷偶联剂 炭黑改性 电性能 

分 类 号：TB332[一般工业技术—材料科学与工程]