摘要
以针状焦、改质沥青为原料,选取Fe、Si-Fe、Pr_6O_(11)及Ti-RE 4种催化剂,在2 400℃的热处理温度下制备低电阻率半石墨化炭块。对得到的石墨样品进行电阻率的测定,利用X射线衍射研究试样晶体结构参数,并采用扫描电子显微镜观察其微观结构。分析结果表明:4种催化剂均可有效地提高炭块石墨化度,降低电阻率;Pr_6O_(11)催化效果最好,在添加质量分数为3%时,得到最低电阻率12.22μΩ·m,比空白样降低了1/5以上。
The low electrical resistivity semi-graphitized carbon blocks were prepared with coal-based needle coke as aggregate and coal tar pitch as binder under the temperature of 2 400 ℃. Fe, Si-Fe, Pr6O(11) and Ti-RE were selected as catalysts. The electrical resistivities of the semi-graphitized carbon blocks obtained were examined by resistivity instrument. The crystal structure parameters and the microscopic structures of the semi-graphitized carbon block samples were observed by XRD and SEM measurements.The results show that all of the catalysts can improve the graphitization degree and reduce the electrical resistivity effectively; Pr6O(11) has the best performance, and when the mass fraction is 3%, the lowest electrical resistivity of 12.22 μΩ·m was obtained, which decreased by over 1/5 than that of blank sample.
作者
祁震宇
路贵民
于建国
Qi Zhen-yu;Lu Gui-min;Yu Jian-guo(School of Chemical Engineering, National Engineering Research Center for Integrated Utilization of Salt Lake Resource, East China University of Science and Technology,Shanghai 200237,Chin)
出处
《炭素技术》
CAS
北大核心
2018年第3期30-36,共7页
Carbon Techniques
基金
国家自然科学基金资助项目(U1407202)
关键词
石墨化催化剂
阴极炭块
电阻率
Graphitization catalyst
cathode carbon block
electrical resistivity