| Low Temperature Phase Transition Behavior of Ca-Doped Lanthanum Chromites |
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| 引用本文： | 李胜利 付贵福 刘伟明 敖青 孙良成 朱新德. Low Temperature Phase Transition Behavior of Ca-Doped Lanthanum Chromites[J]. 中国稀土学报(英文版), 2005, 23(4): 451-454 |
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| 作者姓名： | 李胜利 付贵福 刘伟明 敖青 孙良成 朱新德 |
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| 作者单位： | [1]College of Materials Science and Engineering, Shandong University, Jinan 250061, China [2]Baotou RareEarths Institute, Baotou 014010, China |
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| 摘 要： | Phase transition of LaCrO3 and doped-LaCrO3 was studied by DSC, TG and XRD, and thermal expansion during the transition was analyzed. It is found that phase transition of LaCrO3 begins at about 240℃ and ends at about 265 ℃. Temperatures of phase transition rise obviously with increasing Ca^2＋ content. The transition of LaCrO3 and Ca-doped LaCrO3 from orthorhombic to rhombohedral is accompanied with endothermic reaction. No obvious change occurs in mass, but remarkable shrinkage occurs during phase transition.
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| 关 键 词： | 铬铁矿 复合矿 稀土 掺杂 钙 低温相变 |
| 文章编号： | 1002-0721（2005）04-0451-04 |
| 收稿时间： | 2004-09-30 |
| 修稿时间： | 2005-01-14 |
Low Temperature Phase Transition Behavior of Ca-Doped Lanthanum Chromites |
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| Li Shengli,Fu Guifu,Liu Weiming,Ao Qing,SUN Liangcheng,Zhu Xinde. Low Temperature Phase Transition Behavior of Ca-Doped Lanthanum Chromites[J]. Journal of Rare Earths, 2005, 23(4): 451-454 |
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| Authors: | Li Shengli Fu Guifu Liu Weiming Ao Qing SUN Liangcheng Zhu Xinde |
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| Abstract: | Phase transition of LaCrO3 and doped-LaCrO3 was studied by DSC, TG and XRD, and thermal expansion during the transition was analyzed. It is found that phase transition of LaCrO3 begins at about 240 ℃ and ends at about 265 ℃. Temperatures of phase transition rise obviously with increasing Ca2 content. The transition of LaCrO3 and Ca-doped LaCrO3 from orthorhombic to rhombohedral is accompanied with endothermic reaction. No obvious change occurs in mass, but remarkable shrinkage occurs during phase transition. |
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| Keywords: | inorganic materials lanthanum chromites phase transition thermal analysis rare earths |
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