论文部分内容阅读
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 composition and structure of ErFe11Ti compounds in the flowing nitrogen atmosphere from room temperature (~ 300 K) to 1473 K were studied by means of X-ray diffraction (XRD), differential thermal-thermogravimetric analysis (DTA-TG) and magnetic measurements. And Curie temperature change behavior. The results showed that the ErFe11Ti compound had the most intense nitrogen adsorption when the temperature was about 600 K, and the Curie temperature TC of the compound was significantly increased after nitrogen uptake. At higher temperatures, ErFe11Ti may partially decompose to Er-N, α-Fe (Ti). α-Fe and Ti at about 860 and 1300 K, respectively, occurred nitrogen absorption reaction, the formation of FeNy and Ti2N2. During the entire heating process, the DTA curve did not show obvious exothermic peak due to the sample curling up to the Curie point of a component, which may be due to the smaller latent heat of phase transformation of the sample.