Densification of in situ prepared mesocarbon microbead/carbon nanotube composites by hot-press sintering  

作　　者：吴彬 巩前明 吴建军 宋怀河 梁吉 

机构地区：[1]Department of Mechanical Engineering, Tsinghua University [2]Key Laboratory for Advanced Materials Processing Technology of Ministry of Education, Tsinghua University [3]State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology

出　　处：《中国有色金属学会会刊：英文版》2009年第3期646-651,共6页Transactions of Nonferrous Metals Society of China

基　　金：Project(10332020) supported by the National Natural Science Foundation of China

摘　　要：In situ prepared mesocarbon microbead/carbon nanotube(MCMB/CNT) composites are potential precursors of high density carbon materials for various applications. Integrated MCMB/CNT composites were successfully fabricated by hot-press sintering at 550 ℃ under 30 MPa. After further calcination at 900 ℃, the hot-press sintering fabricated MCMB block has an apparent density of 1.77 g/cm3 and the open porosity 5.1%. With the addition of 5%(mass fraction) CNTs, the density of the composite block is elevated to 1.84 g/cm3, and its open porosity is reduced to 3.5%. The flexural strength of composite block with 5% CNTs is elevated to 116 MPa. Through the hot-press sintering, pores of 10-50 nm in the calcinated bulks are remarkably eliminated. The interstice between microbeads in the composite blocks is filled up by CNTs together with β-resin and quinoline-insoluble spheres, which can further contribute to the densification.In situ prepared mesocarbon microbead/carbon nanotube（MCMB/CNT） composites are potential precursors of high density carbon materials for various applications. Integrated MCMB/CNT composites were successfully fabricated by hot-press sintering at 550 ℃ under 30 MPa. After further calcination at 900 ℃, the hot-press sintering fabricated MCMB block has an apparent density of 1.77 g/cm^3 and the open porosity 5.1%. With the addition of 5%（mass fraction） CNTs, the density of the composite block is elevated to 1.84 g/cm^3, and its open porosity is reduced to 3.5%. The flexural strength of composite block with 5% CNTs is elevated to 116 MPa. Through the hot-press sintering, pores of 10-50 nm in the calcinated bulks are remarkably eliminated. The interstice between microbeads in the composite blocks is filled up by CNTs together with β-resin and quinoline-insoluble spheres, which can further contribute to the densification.

关 键 词：碳纳米管复合材料 中间相炭微球 热压烧结 原位制备 致密化 复合砌块 孔隙率 表观密度 

分 类 号：TB383.1[一般工业技术—材料科学与工程]