体状Fe_3N和Fe_2N化合物合成及其磁特性研究  

Synthesis and Magnetic Characteristics of Fe 3N and Fe 2N Compounds in Bulk Form

作　　者：周桂琴[1,2] 连法增 高强[1,2] 

机构地区：[1]东北大学材料科学与工程系 [2]上海交通大学

出　　处：《金属功能材料》1998年第4期158-160,共3页Metallic Functional Materials

摘　　要：纯铁粉在一定比例的氨和氢的气氛中，在某一温度下铁和氮进行固气反应。研究了氨气和氢气的比例对固气反应产物的影响规律；温度和时间对反应产物的影响规律，进而获得单一均匀的体状Ｆｅ３Ｎ和Ｆｅ２Ｎ化合物。利用振动样品磁强计、磁天平和热磁分析等手段检测了Ｆｅ３Ｎ和Ｆｅ２Ｎ的磁特性。Ｆｅ３Ｎ化合物的饱和磁化强度（室温）为１３４Ａｍ２／ｋｇ，居里温度Ｔｃ＝２６０℃；而Ｆｅ２Ｎ化合物饱和磁化强度为２３．１Ａｍ２ｋｇ，属于弱磁性和非磁性，居里温度Ｔｃ＝２５℃。The pure iron powders were reacted with nitrogen under the certain ratio of NH 3 and H 2. The effect of the ratio of HN 3 and H 2 on the reacted products, and that of temperature and time on the reacted products were investigated. The pure Fe 3N and Fe 2N compounds in bulk form were obtained. The magnetic properties of Fe 3N and Fe 2N compounds were measured by VSM. The saturation magnetization and Curie temperature of Fe 3N and Fe 2N compounds are 134 Am 2/kg,T c=260℃ and 23.1 Am 2/kg, T c=25℃, respectively.

关 键 词：相结构 磁特性 铁氮化合物 粉末冶金 薄膜 

分 类 号：TF125.8[冶金工程—粉末冶金] O484[冶金工程—冶金物理化学]