纳米级Mn-Zn软磁铁氧体磁粉溶胶-凝胶法制备  

Soft magnetic Mn-Zn ferrite nanoparticles prepared by sol-gel

作　　者：杨晓明[1] 杨新科[2] 

机构地区：[1]西北有色地质研究院,陕西西安710054 [2]宝鸡文理学院化学化工系,陕西宝鸡721007

出　　处：《宝鸡文理学院学报（自然科学版）》2007年第4期279-281,共3页Journal of Baoji University of Arts and Sciences(Natural Science Edition)

基　　金：陕西省教育厅专项基金(99JK009)资助项目

摘　　要：目的提高超细粉合成反应活性,降低合成温度,改善超细粉烧结性能,从而提高锰锌铁氧体的性能。方法应用溶胶-凝胶法制备软磁Mn-Zn铁氧体磁粉。用X射线衍射(XRD)和透射电镜(TEM)对粉体材料进行分析表征,并用振动样品磁强计(VSM)测定样品的饱和磁化强度和矫顽力。结果所得样品为纳米级单相Mn-Zn铁氧体,其晶粒大小约为40 nm,M=0.14 552 EMU,HC=11 480 Oe,这表明该纳米级Mn-Zn铁氧体不具有超顺磁特性,而具有很好的活性。结论采用溶胶-凝胶法制备的纳米级Mn-Zn铁氧体磁粉,可以用来制备高性能的软磁Mn-Zn铁氧体材料。Aim To improve superfine powder reaction activity, low synthesis temperature could promote superfine powder calcining property and improve Mn-Zn ferrite properties. Methods Soft magnetic Mn-Zn ferrite nanoparticles were prepared by using sol-gel, the powder is analyzed and characterized by XRD and TEM. The magnetic measurements（saturation magnetization and coercivity） were carried out with a vibrating sample magnetometer（VSM）. Results The sample is nanometer single phase Mn-Zn ferrities and the corresponding grain size is about 40 nm, M =0.14 552 EMU and HC =11 480 Oe, which shows that the nanoparticles is not superparamagnetic, but they are highly active. Conclution Soft magnetic Mn-Zn ferrite nanoparticles were prepared by using sol-gel and can be used to fabricate high performance soft magnetic Mn-Zn ferrite materials.

关 键 词：Mn—Zn铁氧体纳米磁粉 溶胶-凝胶转变 合成 磁性能 

分 类 号：TM277.1[一般工业技术—材料科学与工程]