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Sm2Fe17化合物的差热-热重分析 被引量:5

Investigation of the Phase Structure of Sm_2Fe_(17) Compound by Differential Thermal/Thermogravimetric Analyzer
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摘要 通过X射线衍射、差热-热重(DTA-TG)联用仪以及磁测量等手段研究了Sm2Fe17化合物及其氮化物的相结构和磁性。通过对Sm2Fe17化合物的DTA-TG分析可以得到:当温度从室温(约300 K)升至1473 K的过程中,在N2保护的条件下,N原子扩散进入Sm21Fe17化合物中,在温度为700 K左右时Sm2Fe17化合物吸氮反应最剧烈,吸氮的结果使得Sm2Fe17Nx化合物的居里温度显著提高。随着温度的继续升高,在吸氮反应的同时,Sm2Fe17Nx化合物变的不稳定,部分分解为SmN化合物和Fe。对实验结果的分析可以得出,该化合物在接近熔点的1473 K以下只存在Th2Zn17型结构,不存在Th2Ni17型结构。 The structure and magnetic properties of SmEFe17 compound and its nitrides were investigated by means of differential thermal/thermogravimetric analysis. The result shows that the Curie temperature of SmEFe17Nx nitrides was improved obviously. The analysis shows that the increase of the Curie temperature was caused by interstitial N-atoms be incorporated into 3d-sublattice. At higher nitrogenized reaction of temperature than 700 K, the Sm2Fe17 became violent, in the meantime, the decomposed reaction of Sm2Fe17TNx took place and resuhsed in SmN compounds and α- Fe. The SmzFe17 or SmEFe17TNx exhibited only singlephases of ThzZn17 below 1473 K.
出处 《稀有金属》 EI CAS CSCD 北大核心 2009年第1期76-79,共4页 Chinese Journal of Rare Metals
基金 国家自然科学基金(50871074) 天津科技大学博士基金(0200153)资助项目
关键词 Sm2Fe17 化合物 X射线衍射 差热-热重分析 Sm2 Fe17 compound X-ray diffraction differential thermal/thermogravimetric analyz
作者简介 郝延明(1963-),男,博士,教授;研究方向:磁学与磁性材料 通讯联系人(E—mail:haofuyan@126.com.haoym63@126.com)
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