微波烧结法制备碳化硼-石墨化炭黑复合粉体  

Preparation of B4C-graphitized carbon black composite powders by microwave sintering method

作　　者：李忠轲 黄紫豪 郑家舜 刘彤 姜田宝 吴钦鑫 魏军从 涂军波 Li Zhongke;Huang Zihao;Zheng Jiashun;Liu Tong;Jiang Tianbao;Wu Qinxin;Wei Juncong;Tu Junbo

机构地区：[1]华北理工大学河北省无机非金属材料重点实验室

出　　处：《耐火材料》2020年第1期37-40,共4页Refractories

基　　金：河北省自然科学基金资助项目(E2017209164);河北省钢铁联合研究基金资助项目(E2017209094);华北理工大学大学生创新训练项目(X2018077)

摘　　要：为了更加经济高效地制备含碳耐火材料防氧化用碳化硼-石墨化炭黑复合粉,按三氧化二硼和炭黑质量比为55∶45进行配料,于氩气气氛下采用微波烧结法制备了碳化硼-石墨化炭黑复合粉体。研究了烧结温度(1600、1650℃)和保温时间(0.5、1、1.2和1.5 h)对烧后粉体物相组成、石墨化程度、显微结构、氧化温度的影响。研究表明:微波烧结1600℃合成温度偏低,1650℃可以制备出碳化硼-石墨化炭黑复合粉体;随着保温时间适当延长,复合粉体中炭黑的石墨化程度提高,碳化硼晶粒发育趋于完整,粉体氧化温度提高。In order to prepare B 4C-graphitized carbon black composite powder for anti-oxidation of carbon-containing refractories economically and efficiently,the B 4C-graphitized carbon black composite powder was prepared by microwave sintering in argon atmosphere according to the mass ratio of boron trioxide to carbon black at 5545.Effects of the sintering temperature(1600 and 1650℃)and the holding time(0.5,1.0,1.2,and 1.5 h)on the phase composition,graphitization degree,microstructure,oxidation temperature of the powder after firing were investigated.The results show that the microwave sintering synthesis temperature at 1600℃is relatively low,and the B 4C-graphitized carbon black composite powder can be prepared at 1650℃;with the proper extension of the holding time,the graphitization degree of carbon black in the composite powder increases,the development of boron carbide grains tends to be complete,and the oxidation temperature of the powder increases.

关 键 词：微波烧结法 碳化硼-石墨化炭黑 复合粉体 氧化温度 石墨化程度 

分 类 号：TQ175[化学工程—硅酸盐工业]