Low Temperature Phase Transition Behavior of Ca-Doped Lanthanum Chromites
来源期刊：JOURNAL OF RARE EARTHS2005年第4期
论文作者：Fu Guifu Zhu Xinde Ao Qing Liu Weiming SUN Liangcheng Li Shengli
Key words：inorganic materials; lanthanum chromites; phase transition; thermal analysis; rare earths;
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.
Fu Guifu1，Zhu Xinde1，Ao Qing1，Liu Weiming1，SUN Liangcheng2，Li Shengli1
(1.College of Materials Science and Engineering, Shandong University, Jinan 250061, China;
2.Baotou Rare Earths Institute, Baotou 014010, China)
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.
Key words:inorganic materials; lanthanum chromites; phase transition; thermal analysis; rare earths;
【全文内容正在添加中】
