以石油焦和高温煤沥青制备各向同性石墨材料的研究  

Preparation of isotropic graphite from petroleum coke and high-temperature coal-tar pitch

作　　者：方登科[1] 杨栋梁 杨侨 李轩科[1] 

机构地区：[1]武汉科技大学化学工程与技术学院,湖北武汉430081 [2]四川广汉士达炭素股份有限公司,四川广汉618000

出　　处：《武汉科技大学学报》2012年第4期298-303,共6页Journal of Wuhan University of Science and Technology

摘　　要：以煅后石油焦为骨料,高温煤沥青为黏结剂,采用冷混捏球磨,经过冷等静压工艺在不同压力下制得各向同性石墨材料,并对不同成型压力下制备所得材料的微观结构和物理性能进行分析。结果表明,当骨料颗粒平均尺寸d50约为21μm,黏结剂含量为33%时,其适宜的成型压力为80～100MPa;在不同的成型压力下制备各向同性石墨材料,应采用不同的焙烧和石墨化升温曲线;提高成型压力、减少骨料石油焦中大尺寸片状结构颗粒的数量及增强骨料和黏结剂混捏的均匀性,均有利于提高所制备各向同性石墨材料的物理性能;采用高温煤沥青作为黏结剂,有利于提高各向同性石墨材料的导热率和电学性能。Using calcined petroleum coke powders as the filler and high-temperature coal-tar pitch as the binder, isotropic graphite blocks were prepared by a cold ball-milling mixing method plus subsequent cold isotropic press, baking and graphitization treatment process. The properties and microstructure of the prepared material and their relationship with press process were characterized and analyzed. The results show that the proper forming pressure of the preparation of isotropic graphite is about 80-100 MPa when the mean size of coke filler is about 21μm and the dosage of pitch binder is 33%.

关 键 词：石油焦 高温煤沥青 冷混捏球磨 各向同性石墨 成型压力 

分 类 号：TQ165[化学工程—高温制品工业]