| 真空碳热还原法制备碳化钛粉末 |
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| 引用本文： | 森维,徐宝强,杨斌,孙红燕,宋建勋,万贺利,戴永年. 真空碳热还原法制备碳化钛粉末[J]. 中国有色金属学会会刊, 2011, 21(1): 185-190 |
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| 作者姓名： | 森维 徐宝强 杨斌 孙红燕 宋建勋 万贺利 戴永年 |
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| 作者单位： | 森维,SEN Wei(真空冶金国家工程实验室,昆明,650093;云南省有色金属真空冶金重点实验室,昆明,650093;昆明理工大学材料科学与工程学院,昆明,650093);徐宝强,杨斌,孙红燕,宋建勋,万贺利,戴永年,XU Bao-qiang,YANG Bin,SUN Hong-yan,SONG Jian-xun,WAN He-li,DAI Yong-nian(真空冶金国家工程实验室,昆明,650093;云南省有色金属真空冶金重点实验室,昆明,650093) |
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| 基金项目： | Chinau，the National Natural Science Foundation of China，Specialized Research Fund for the Doctoral Program of Higher Education |
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| 摘 要： | 采用XRD、SEM、XRF以及激光粒度分析仪等分析手段,研究真空条件下碳热还原TiO2制备的碳化钛粉末。热力学计算和实验结果表明：真空条件下容易获得碳化钛,且随温度逐渐升高得到的产物顺序为：Magneli相（Ti4O7）、Ti3O5、Ti2O3、TiCxO1-x和TiC。当物料配比为1：3.2-1：6时,在1550℃保温4h的条件下可获得单相TiC粉末;物料配比为1：4和1：5时,产物粉末为标准化学计量的TiC1.0粉末;物料配比为1：4时,得到的产物为单相低杂质超细碳化钛粉末（D50为3.04μm）、SEM观察表明在产物块体表面存在分布均匀、团聚小、结构疏松的结构。
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| 关 键 词： | 二氧化钛 碳化钛 真空 碳热还原方法 |
Preparation of TiC powders by carbothermal reduction method in vacuum |
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| SEN Wei,XU Bao-qiang,YANG Bin,SUN Hong-yan,SONG Jian-xun,WAN He-li,DAI Yong-nian. Preparation of TiC powders by carbothermal reduction method in vacuum[J]. Transactions of Nonferrous Metals Society of China, 2011, 21(1): 185-190 |
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| Authors: | SEN Wei XU Bao-qiang YANG Bin SUN Hong-yan SONG Jian-xun WAN He-li DAI Yong-nian |
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| Affiliation: | SEN Wei1,2,3,XU Bao-qiang1,YANG Bin1,SUN Hong-yan1,SONG Jian-xun1,WAN He-li1,DAI Yong-nian1,2 1.National Engineering Laboratory for Vacuum Metallurgy,Kunming 650093,China,2.Key Laboratory of Vacuum Metallurgy for Nonferrous Metal of Yunnan Province,3.Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 65 0093 |
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| Abstract: | The preparation of fine TiC powders by carbothermal reduction of TiO2 in vacuum was investigated by XRD,SEM,XRF and laser particle sizer.Thermodynamic analysis indicates that it is easy to prepare TiC in vacuum and the formation sequence of products are Ti4O7（Magneli phase）,Ti3O5,Ti2O3,TiCxO1-x and TiC with the increase of reaction temperature.Experimental results demonstrate that TiC powders with single phase are obtained with molar ratio of TiO2 to C ranging from 1：3.2 to 1：6 at 1 550 ℃ for 4 h when the system pressure is 50 Pa,and TiC1.0 is gained when the molar ratio of TiO2 to C is 1：4 and 1：5.In addition,fine TiC1.0 powders（D50 equals 3.04 μm） with single phase and low impurities are obtained when the molar ratio of TiO2 to C is 1：4.SEM observation shows that uniform shape,low agglomeration,and loose structure are observed on the surface of block product. |
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| Keywords: | titanium dioxide titanium carbide vacuum carbothermal reduction method |
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