文献类型：期刊文献

中文题名：Catalytic graphitization of carbon/carbon composites by lanthanum oxide

英文题名：Catalytic graphitization of carbon/carbon composites by lanthanum oxide

作者：Zhang Can[2];Lu Guimin[1];Sun Ze[2];Yu Jianguo[1,2]

机构：[1]E China Univ Sci & Technol, Sch Resources & Environm Engn, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2012

卷号：30

期号：2

起止页码：128

中文期刊名：Journal of Rare Earths

外文期刊名：JOURNAL OF RARE EARTHS

收录：CSTPCD;;EI(收录号：20121214881958);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000301382500008)】；CSCD:【CSCD2011_2012】；

基金：Project supported by the National High-Tech R&D Program (863 Program) of China (2009AA06Z102), the Fundamental Research Fund for the Central Universities and State Key Laboratory of Exploration Fund of China

语种：英文

中文关键词：lanthanum oxide; catalytic graphitization; C/C composites; rare earths

外文关键词：lanthanum oxide; catalytic graphitization; C/C composites; rare earths

摘要：Graphitized carbon/carbon composites were prepared by the process of catalytic graphitization with the rare-earth catalyst, lantha-num oxide （La2O3）, in order to increase the degree of graphitization and reduce the electrical resistivity. The modified coal tar pitch and coal-based needle coke were used as carbon source, and a small amount of La2O3 was added to catalyze the graphitization of the disordered carbon materials. The effects of La2O3 catalyst on the graphitization degree and microstructure of the carbon/carbon composites were investi-gated by X-ray diffraction, scanning electron microscopy, and Raman spectroscopy. The results showed that La2O3 promoted the formation of more perfect and larger crystallites, and improved the electrical/mechanical properties of carbon/carbon composites. Carbon/carbon compos-ites with a lower electrical resistivity （7.0 ？？？m） could be prepared when adding 5 wt.% La2O3 powder with heating treatment at 2800 oC. The catalytic effect of La2O3 for the graphitization of carbon/carbon composites was analyzed.
Graphitized carbon/carbon composites were prepared by the process of catalytic graphitization with the rare-earth catalyst, lanthanum oxide (La2O3), in order to increase the degree of graphitization and reduce the electrical resistivity. The modified coal tar pitch and coal-based needle coke were used as carbon source, and a small amount of La2O3 was added to catalyze the graphitization of the disordered carbon materials. The effects of La2O3 catalyst on the graphitization degree and microstructure of the carbon/carbon composites were investigated by X-ray diffraction, scanning electron microscopy, and Raman spectroscopy. The results showed that La2O3 promoted the formation of more perfect and larger crystallites, and improved the electrical/mechanical properties of carbon/carbon composites. Carbon/carbon composites with a lower electrical resistivity (7.0 mu Omega.m) could be prepared when adding 5 wt.% La2O3 powder with heating treatment at 2800 degrees C. The catalytic effect of La2O3 for the graphitization of carbon/carbon composites was analyzed.