Fe粉含量对燃烧合成制备超细Ni_(0.4)Zn_(0.6)Fe_2O_4粉体相组成、形貌和磁性能影响  

Effects of Fe amount on phases,morphology andmagnetic properties of Ni_(0.4)Zn_(0.6)Fe_2O_4 ferrite ultrafine powders prepared by combustion synthesis

作　　者：董鹏[1] 王霞[1] 喇培清[1] 魏玉鹏[1] 欧玉静[1] 

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州730050

出　　处：《功能材料》2016年第10期10148-10152,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51164022)

摘　　要：以Fe粉、NiO、ZnO为原料,NaClO_4为氧源,NaCl为稀释剂,通过燃烧合成法成功制备了千克级超细NiZn铁氧体。采用XRD、SEM、EDS以及VSM等研究了Fe粉含量对NiZn铁氧体粉体相组成、形貌和磁性能的影响。结果表明,随着Fe粉含量k增加,退火后颗粒尺寸逐渐增大,外形呈现为扁平球形,形成了单相铁氧体,最小粒径为750nm,最大为1 200nm。当k=0.7时退火的产物饱和磁化强度最大为66A·m2/kg,而k=0.5时产物的矫顽力最小可达16.29×79.6A/m。NiZn ferrite ultrafine powder were prepared by combustion synthesis using Fe,NiO and ZnO as raw materials,NaClO4 as oxygen source and NaCl as diluent.The effects of Fe amount on phases,morphology and magnetic properties were systematically investigated using scanning electron microscopy （SEM）,X-ray diffrac-tion （XRD）,energy dispersive spectrometer （EDS）and vibrating sample magnetism （VSM）.The results showed that the size of annealed powders increased and size distribution became broader with the Fe content. After annealing,the crystalline structure of powders is more complete,the saturation magnetization of the powders reached its maximum value at 6 A-m2/kg when k is 0.7,while the coercivity obtain its minimum val-ue at 16.29×79.6 A/m when k is 0.5.

关 键 词：NIZN铁氧体 燃烧合成法 形貌 相组成 磁性能 

分 类 号：O614.241[理学—无机化学]