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| 常压下碳热还原制备碳化钒(V_8C_7)粉末的研究 | |
| 引用本文： | 姜中涛,李力,陈巧旺,邓莹,刘颖.常压下碳热还原制备碳化钒(V_8C_7)粉末的研究[J].硬质合金,2011,28(5):294-299. |
| 作者姓名： | 姜中涛 李力 陈巧旺 邓莹 刘颖 |
| 作者单位： | 1. 重庆文理学院材料交叉学科研究中心,重庆402160;重庆市高校微纳米材料工程与技术重点实验室,重庆402160;四川大学材料科学与工程学院,四川成都 610065 2. 重庆文理学院材料交叉学科研究中心,重庆402160;重庆市高校微纳米材料工程与技术重点实验室,重庆402160 3. 四川大学材料科学与工程学院,四川成都,610065 |
| 基金项目： | 重庆市自然科学基金计划重点项目(2010YZ0009); 重庆文理学院校内科研项目(Y2010XC49) |
| 摘 要： | 为了实现小批量连续化制备碳化钒粉末,以工业级V2O5和纳米碳黑为原料,在常压下氩气保护的碳管炉中高温反应得到了V8C7。采用X射线衍射仪(XRD)、扫描电镜(SEM)、LECO碳氧分析仪对反应产物进行了分析。结果表明:碳化温度为1 450℃时,可得到有序V8C7,但是杂质含量较高;提高温度有利于粉末纯度的提高,而不利于粉末的细化;最终在1 600℃保温4 h的条件下,制备出游离碳质量分数为0.31%、氧质量分数为0.69%、平均粒径为2μm的V8C7粉末。 |
| 关 键 词： | 碳化钒 常压 还原/碳化 五氧化二钒 |
Study on Preparation of V_8C_7 Powder by Carbon Thermal Reduction under Normal Pressure |
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| Jiang Zhongtao , Li Li , Chen Qiaowang , Deng Ying , Liu Ying.Study on Preparation of V_8C_7 Powder by Carbon Thermal Reduction under Normal Pressure[J].Cemented Carbide,2011,28(5):294-299. | |
| Authors: | Jiang Zhongtao Li Li Chen Qiaowang Deng Ying Liu Ying |
| Affiliation: | Jiang Zhongtao1,2,3 Li Li1,2 Chen Qiaowang1,2 Deng Ying1,2 Liu Ying3(1.Research Center for Material Interdisciplinary Science,Chongqing University of Arts and Science,Chongqing 402168,China,2.Chongqing Key Laboratory of Micro/Nano Materials Engineering and Technology,3.College of Material Science and Engineering,Sichuan University,Chendu Sichuan 610065,China) |
| Abstract: | In order to realize the smallscale continuous production,the V8C7 powder was prepared by the high temperature reaction of industrial grade V2O5 powder and nanometer carbon in the graphite furnace under the argon atmosphere.The reaction product was analyzed by XRD,SEM,and LECO carbon-oxygen analyzer.The result shows that the ordered V8C7 powder is obtained when carbonized at 1 450 ℃.But the impurity content in the V8C7 power is high.Higher reaction temperature has advantage to improve the powder purity but goes against the refinement.When carbonized at 1 600 ℃ for 4 h,the V8C7 powder with 0.31% free carbon,0.69% oxygen（mass fraction）and average particle size of 2 μm is obtained. |
| Keywords: | vanadium carbide normal pressures reduction/carbonization vanadium pentoxide |
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