B_2O_3掺杂对纳米Mn-Zn铁氧体烧结性能的影响  

Effect of B_2O_3 Doping on Sintering Properties of Nanometer Mn-Zn Ferrites

作　　者：张雪林[1] 华菲[1] 王新[1] 彭会芬[1] ZHANG Xue-lin;HUA Fei;WANG Xin;PENG Hui-fen(School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]河北工业大学材料科学与工程学院,天津300130

出　　处：《人工晶体学报》2018年第9期1855-1860,1867,共7页Journal of Synthetic Crystals

基　　金：天津市应用基础与前沿技术研究计划(15JCZDJC31000)

摘　　要：针对目前的纳米材料掺杂不均,易导致烧结后材料性能差等问题。本文将掺杂物制成水溶液,然后再与Mn-Zn铁氧体纳米粉体进行混合,以提高B_2O_3分布的均匀度。研究结果表明:随着B_2O_3掺杂量的增加,烧结后材料的各项性能呈抛物线规律变化,并于B_2O_3掺杂量为0.15wt%时达到极值。与未掺杂的材料相比,虽然材料的饱和磁化强度、起始磁导率、居里点及截止频率有不同程度下降,但其功率损耗特性却显著改善。这应得益于B_2O_3的均匀掺杂使得烧结后材料的致密度提高(相对密度约为98%)以及微观组织的改善。Inhomogeneoug distribution of dopants in nano particles easily resulted in poor properties of the sintered materials.In this paper,we tried to prepare solution of the B 2O 3,which was used as dopant for the MnZn ferrite,and then mixed with the MnZn ferrite nano powders for the purpose of improving distribution state of the B 2O 3 dopant.Results show that various properties of the sintered materials change in a parabolic form and reache the extramum at the B 2O 3 content of 0.15wt%.The sample with B 2O 3 content of 0.15wt%presente much lower power loss than the undoped one at the expense of decrease in other magnetic properties like saturated magnetization,initial permeability,Curie point and cut-off frequency.Those results should be attributable to improvement in density(relative density of about 98%)and homogeneity in microstructure of the sintered samples.

关 键 词：MN-ZN铁氧体 磁性材料 掺杂 烧结性能 

分 类 号：TM271[一般工业技术—材料科学与工程]