制备条件对NiZn铁氧体纳米晶材料磁性能的影响  

Sol-Gel Preparation and Magnetic Properties of NiZn Ferrite Nanoparticles

作　　者：褚宁杰[1] 王新庆[1] 刘亚丕[1] 孙历娜 金红晓[1] 金顶峰[1] 陈敏[1] 吴琼[1] 葛洪良[1] 

机构地区：[1]中国计量学院,浙江杭州310018

出　　处：《稀有金属材料与工程》2010年第S2期302-305,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(20801050);国家质检总局科技计划项目(2007QK60);浙江省分析测试科技计划项目(2007F70043)

摘　　要：利用溶胶-凝胶法制备尖晶石结构的Ni1-xZnxFe2O4铁氧体纳米粉体材料,同时系统研究Ni/Zn比、溶液pH值以及煅烧温度对制备的Ni1-xZnxFe2O4铁氧体纳米材料微结构及磁性能影响。结果表明,随着Ni含量的增加,生成物中未反应的氧化铁不断增多。当x=0.3时,NiZn铁氧体的饱和磁化强度(Ms)最大。但随着温度的增加,氧化铁的含量减少,NiZn铁氧体的生成量增加。同时发现溶液pH值对Ni0.7Zn0.3Fe2O4铁氧体微结构及性能影响较大,当溶液的pH=5时,Ni0.7Zn0.3Fe2O4纳米材料的Ms最大。实验得到了NiZn铁氧体的最佳制备条件:Ni/Zn比为0.7/0.3,溶液pH值为5,最佳烧结温度为900℃。(Ni1-x) ZnxFe2O4 ferrite powders with the spinel structure were prepared by a sol-gel method, and then the influence of the ratio of Ni/Zn, the pH value of the solution and the sintering temperature on the microstructure and magnetic properties of the as-prepared NiZn ferrite nanoparticles was mainly discussed. The impurity Fe2O3 phase presented with the increasing Ni content; the saturation magnetization (Ms) of the Ni1-xZnxFe2O4 reached maximum at x=0.3. And the impurity Fe2O3 decreased with the sintering temperature. At the same time, the pH value also affected the magnetic properties of the Ni0.7Zn0.3Fe2O4 ferrite, and Ms reached max at pH=5. Therefore, from the above results, the optimized conditions are obtained as the following: the ratio of Ni/Zn= 0.7:0.3, pH=5 and the sintering temperature of 900 ℃.

关 键 词：NIZN铁氧体 尖晶石结构 磁性能 微结构 

分 类 号：TM277[一般工业技术—材料科学与工程]