| TiB2合成反应机理的优势区相图分析 |
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| 引用本文： | 马爱琼,蒋明学.TiB2合成反应机理的优势区相图分析[J].中国有色金属学报,2011,21(6). |
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| 作者姓名： | 马爱琼 蒋明学 |
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| 作者单位： | 西安建筑科技大学材料科学与工程学院,西安,710055 |
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| 基金项目： | 陕西省教育厅自然科学专项科研基金资助，陕西省重点学科建设专项资金资助项目 |
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| 摘 要： | 随着碳热还原反应的进行,B2O3被C还原生成B2O2,B2O2进一步被碳还原生成B4C.碳热还原TiO2和B2O3合成TiB2的反应机理如下在1200～1300℃温度下,TiO2被C还原成中间产物Ti3O5;在1250～1300℃温度范围,B2O3被C还原生成中间气相产物B2O2;当还原反应温度达到1300℃以上时,中间产物Ti3O5与B2O2一起被C还原生成TiB2.
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| 关 键 词： | TiB2 优势区相图 碳热还原法 反应机理 |
Predominace area phase diagram analysis about synthetic reaction mechanism of TiB2 |
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| MAAi-qiong,JIANG Ming-xue.Predominace area phase diagram analysis about synthetic reaction mechanism of TiB2[J].The Chinese Journal of Nonferrous Metals,2011,21(6). |
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| Authors: | MAAi-qiong JIANG Ming-xue |
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| Affiliation: | MA Ai-qiong,JIANG Ming-xue (School of Material Science and Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China) |
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| Abstract: | Using TiO2,B2O3 and C as raw material,TiB2 powder was synthesized by carbothermal reduction.The predominance area phase diagram(PAPD) of Ti-C-O system and B-C-O system were plotted by thermodynamic analysis.In addition,the superposition of predominance area phase diagram of TiO2-B2O3-C system was achieved.The reaction mechanism of synthesizing TiB2 by carbothermal reduction was studied from the standpoint of predominance area phase diagram(PAPD).The results show that in Ti-C-O system,with reaction temperatu... |
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| Keywords: | TiB2 predominance area phase diagram carbothermal reduction reaction mechanism |
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