| Effect of Green and Carbonized Mesocarbon Microbeads on Development of Carbonaceous Mesophase |
| |
| 作者姓名： | 刘秀军 赵乃勤 王成扬 李同起 |
| |
| 作者单位： | School of Material Science and Engineering Tianjin University，School of Material Science and Engineering Tianjin University，School of Chemical Engineering and Technology Tianjin University，School of Material Science and Engineering Tianjin University，Tianjin 300072 China，School of Material Science and Chemical Engineering Tianjin Polytechnic University Tianjin 300160 China，Tianjin 300072 China，Tianjin 300072 China，Tianjin 300072 China |
| |
| 摘 要： | Carbonaceous mesophase derived from differentpitches has different features1—4], such as sphere sizedistribution, deformability, and solubility. For themesophase used to produce fibers, homogeneous bulkmesophase is a desirable candidate5,6]. Thus the o…
|
| 关 键 词： | 绿色内消旋碳微珠 炭化内消旋碳微珠 碳质中间相 煤焦油沥青 热解 |
| 收稿时间： | 2006-05-18 |
Effect of Green and Carbonized Mesocarbon Microbeads on Development of Carbonaceous Mesophase |
| |
| LIU Xiujun,ZHAO Naiqin,WANG Chengyang,LI Tongqi.Effect of Green and Carbonized Mesocarbon Microbeads on Development of Carbonaceous Mesophase[J].Transactions of Tianjin University,2007,13(1):53-56. |
| |
| Authors: | LIU Xiujun ZHAO Naiqin WANG Chengyang LI Tongqi |
| |
| Abstract: | Two types of mesocarbon microbeads( MCMB), one of which was green sphere and the other carbonized at 1 000 ℃, were used to modify coal tar pitches, and their influences on the development of carbonaceous mesophase in coal tar pitches were investigated. Optical microscopy was used to observe the changes caused by the additives. The green MCMB could promote the growth of mesophase spheres. When the holding time at the final temperature was prolonged to 100min, the green MCMB-modified pitch would produce excellent bulk mesophase. Carbonized MCMB prohibited the coalescence of mesophase spheres and was beneficial to forming super large mesophase spheres. In the green MCMB-modified pitch, mesophase spheres grew up using the added MCMB spheres as nuclei, i.e. the green MCMB continued to grow during heat-treatment, which accelerated the formation, growth, and coalescence of mesophase spheres. For carbonized MCMB, their active sites were passivated and they could not continue to grow. These inert spheres could aggregate around the newly-formed mesophase spheres, prohibiting the growth and coalescence of the mesophase spheres. |
| |
| Keywords: | carbon beads carbonaceous mesophase pyrolysis |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
