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| 掺铝铬酸镧烧结过程的相变特征 | |
| 引用本文： | 李士刚,李胜利,孙良成,李德辉,敖青.掺铝铬酸镧烧结过程的相变特征[J].金属热处理,2004,29(10):4-7. |
| 作者姓名： | 李士刚 李胜利 孙良成 李德辉 敖青 |
| 作者单位： | 1. 山东大学,材料科学与工程学院,山东,济南,250061 2. 山东大学,材料科学与工程学院,山东,济南,250061;包头稀土研究院,内蒙古,包头,014010 3. 包头稀土研究院,内蒙古,包头,014010 |
| 基金项目： | 山东省中青年科学家基金 ( 0 2BS0 61)，国家自然科学基金 ( 5 0 3 62 0 0 1) |
| 摘 要： | 用溶胶一凝胶法制备出铬酸镧超细粉体，然后掺入铝粉制成试样。用DSC和XRD等手段对掺铝铬酸镧烧结过程的相变进行研究。结果表明，掺铝La0.9Ca0.1CrO3烧结时铝首先熔化，然后与氧发生反应生成Al2O3，后者发生晶型转变后再与La0.9Ca0.1CrO3反应生成六铝酸镧。掺铝烧结体密度较素坯有所减小，电阻率随铝掺入量的增加而显著增大。 |
| 关 键 词： | 铬酸镧 烧结 相变 |
| 文章编号： | 0254-6051(2004)10-0004-04 |
| 修稿时间： | 2004年6月20日 |
Phase Transformation of Aluminum-Doped Lanthanum Chromite During Sintering Process |
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| LI Shi-gang,LI Sheng-li,SUN Liang-cheng.Phase Transformation of Aluminum-Doped Lanthanum Chromite During Sintering Process[J].Heat Treatment of Metals,2004,29(10):4-7. | |
| Authors: | LI Shi-gang LI Sheng-li SUN Liang-cheng |
| Affiliation: | LI Shi-gang~1,LI Sheng-li~1,SUN Liang-cheng~ |
| Abstract: | Super fine particles of lanthanum chromite were prepared by the sol-gel process,and then mixed with aluminum powder.Phase transformation of aluminum-doped lanthanum chromite during sintering was investigated by DSC and XRD.The results show that Al first melted and then reacted with oxygen to form Al_2O_3.After changes of crystal microstructure,Al_2O_3 reacted with La_(0.9)Ca_(0.1)CrO_3,resulting in the formation of lanthanum hexaaluminate.The density of sintered Aluminum-doped products is lower than that of undoped roughcast products,and the electrical resistivity increased remarkably with increasing the Al-doped amount. |
| Keywords: | lanthanum chromite sintering phase transformation |
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