| CrO3对Fe2O3+Al铝热反应系统反应过程的影响 |
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| 引用本文： | 王双喜,梁开明,张献辉,顾守仁,徐伟.CrO3对Fe2O3+Al铝热反应系统反应过程的影响[J].无机材料学报,2002,17(5):1068. |
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| 作者姓名： | 王双喜 梁开明 张献辉 顾守仁 徐伟 |
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| 作者单位： | 清华大学材料科学与工程系 北京 100084 |
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| 摘 要： | 用铝热-重力分离法制备了不含铁铝尖晶石（FeAl2O4）的陶瓷内衬复合钢管,并通过热力学计算分析了有关反应的优先顺序,结果表明,在Fe2O3+Al系统中强氧化剂CrO3与Al的反应并不是一步完成而是分步反应,FeAl2O4优先于Cr2O3与Al反应,因而加入CrO3添加剂可有效地去除陶瓷层中的尖晶石相,从而提高复合钢管的耐蚀性能.
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| 关 键 词： | 自蔓延高温合成技术 热力学 CrO3 FeAl2O4 |
| 收稿时间： | 2001-09-07 |
| 修稿时间： | 2001-11-09 |
Influence of CrO3 Additive on the Thermite Reaction Procedure in Fe2O3+Al System |
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| WANG Shuang-Xi,LIANG Kai-Ming,ZHANG Xian-Hui,XU Wei.Influence of CrO3 Additive on the Thermite Reaction Procedure in Fe2O3+Al System[J].Journal of Inorganic Materials,2002,17(5):1068. |
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| Authors: | WANG Shuang-Xi LIANG Kai-Ming ZHANG Xian-Hui XU Wei |
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| Affiliation: | Department of Materials Science and Engineering; Tsinghua University; Beijing 100084; China |
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| Abstract: | A hercynite-free ceramic lined steel pipe was fabricated by the self-propagating high-temperature synthesis gravitational-thermite process(SHS G-T Process). The sequence of some reactions which are possible to take place in the aluminothermic system was determined by thermodynamic analysis, i.e. CrO3>Fe2O3>Fe3O4>FeO>FeAl2O4>Cr2O3. The results show that in Fe2O3+Al system CrO3 reacts with Al in two steps. This gives the possibility of elimination of FeAl2O4 phase, which is more reactive than Cr2O3. |
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| Keywords: | CrO3 FeAl2O4 |
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