ErFe_(11)Ti化合物在流动氮气氛中的差热-热重分析  

ErFe_(11)Ti Compound in Circulated N_2 by DTA-TG

作　　者：严达利[1] 李德军[1] 

机构地区：[1]天津师范大学物理系,天津300387

出　　处：《中国稀土学报》2010年第3期335-338,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金资助项目(50872094);天津师范大学青年基金资助项目(52LJ15)

摘　　要：通过X射线衍射（XRD）、差热-热重（DTA-TG）联用仪以及磁测量等手段研究了ErFe11Ti化合物在流动氮气氛从室温（300 K）到1473 K升温过程中成分、结构及居里温度等变化行为。结果表明,温度为600 K左右时,ErFe11Ti化合物吸氮反应最剧烈,吸氮以后化合物的居里温度TC有明显提高。当温度较高时,ErFe11Ti可能部分分解为Er-N,α-Fe（Ti）。α-Fe和Ti分别在860和1300 K左右发生吸氮反应,生成FeNy和Ti2N2。在整个升温过程中,DTA曲线未因样品升温至某成分的居里点发生而出现明显放热峰,这可能是因为样品的相变潜热较小所引起的。The ingredient,structure and Curie temperature of ErFe11Ti compound in circulated N2 from 300 to 1473 K were investigated by means of X-ray diffraction,differential thermal/thermo-gravimetric analyzer and magnetization measurements.The results showed that when the temperature went up to 600 K,the nitrogen absorption of ErFe11Ti processed severely,and the Curie temperature of ErFe11TiNx nitride was improved obviously.The decomposed reaction of ErFe11TiNx by-products ErN compounds and α-Fe（Ti） took place with temperature increasing.When the temperature was about 860 and 1300 K,the nitrogen absorption of α-Fe and Ti reacted by-products FeNy and Ti2N2,respectively.In the temperature range of 300~1473 K,the exothermic peak did not exist in the DTA curve even the temperature reaching to the Curie temperature of some ingredient.It might be due to the low latent heat in the phase transition.

关 键 词：ErFe11Ti化合物 X射线衍射 差热-热重分析(DTA-TG) 吸氮反应 稀土 

分 类 号：TG113[金属学及工艺—物理冶金] O482[金属学及工艺—金属学]