湖南大学学报（自然科学版）2018，Vol.45Issue(6)：40-44,5.DOI:10.16339／j.cnki.hdxbzkb.2018.06.006
煤沥青改性中间相炭微球制备高密高强石墨的研究*
Research on High-density and High-strength Graphite Materials Prepared from Mesophase Microbeads Modified by Coal-tar Pitch
摘要
Abstract
To deal with the problem of mesophase microbeads(MCMB)with a poor sinterability in less binder,thermal analysis and SEM were used to study the influence of different types of coal tar pitch on the sinterability of MCMB powder and performance of the graphite bulks.The results demonstrate that coal tar pitch can coat the surface of the MCMB(D50=23 μm)uniformly by dissolving the pitch and blend-ing the mixture,so that the modified MCMB was obtained and the sinterability was improved.The graph-ite prepared from the modified MCMB was obtained by successive process of isostatic pressing,baking and graphitization,which had a dense and uniform micro-structure.And the flexural strength of the materials was obviously higher than those(22 MPa)made of unmodified MCMBs,and it increased to 27.7 MPa,42.7 MPa and 56.9 MPa,corresponding to the sequence of high softing pitch,modified pitch and middle sof-ting pitch,respectively.关键词
煤沥青/中间相炭微球/高密高强石墨材料/力学性能Key words
coal tar pitch/MCMB/high-density and high-strength graphite materials/mechanical prop-erties分类
通用工业技术引用本文复制引用
刘洪波,秦冬杰,陈惠,刘金平,杨程,侯冬冬..煤沥青改性中间相炭微球制备高密高强石墨的研究*[J].湖南大学学报（自然科学版）,2018,45(6):40-44,5.基金项目
湖南省科技计划资助项目(2015GK1025) （2015GK1025）
