正交实验法优化降温速率制备高磁导率高饱和磁通密度MnZn铁氧体研究  

Study on fabricating MnZn ferrite with both high permeability and high saturation magnetic flux density via orthogonal experiment to optimize cooling rate

作　　者：巩玉钊 应耀 刘东[1] 余靓[1] 车声雷 姜力强[1] GONG Yu-zhao;YING Yao;LIU Dong;YU Jing;CHE Sheng-lei;JIANG Li-qiang(Research Center of Magnetic and Electronic Materials, College of Material Science and Engineering,Zhejiang University of Technology, Hangzhou 310014, China)

机构地区：[1]浙江工业大学材料科学与工程学院磁电功能材料研究所,浙江杭州310014

出　　处：《磁性材料及器件》2016年第5期36-40,53,共6页Journal of Magnetic Materials and Devices

摘　　要：采用正交实验研究了不同降温段的降温速率对MnZn铁氧体磁导率温度稳定性的影响，并在此基础上优化了降温曲线。结果表明，通过正交实验法优化降温曲线，可以制备更加均匀显微结构和较大晶粒尺寸的样品，从而成功地制备得到了高磁导率(μi)高饱和磁通密度(Bs)锰锌铁氧体材料。当降温段1350.1150℃、1150.1000℃和1000.700℃的降温速率分别为0.83℃/min、5.0℃/min和5.0℃/min时，烧结的MnZn铁氧体具有均匀的微观结构和优良的磁性能。此时，烧结体在0.190℃温度区间和应用频率f≤530kHz时保持高磁导率（μi＞5000），同时在常温下具有高的饱和磁通密度Bs=530mT。In this paper,the influence of cooling rate in sintering process on the magnetic properties of MnZnferrite was investigated through orthogonal experiments designed by using Taguchi method.Then the cooling curve wasoptimized based on results of orthogonal experiments.The samples with more uniform microstructure and larger sizewere synthesized and therefore the manganese zinc ferrites with both high magnetic permeability(μi)and highsaturation magnetic flux density(Bs)were successfully achieved.For optimal cooling rates of0.83℃/min,5.0℃/minand5.0℃/min in the temperature range of1350to1150℃,1150to1000℃and1000to700℃,respectively,thesintered MnZn ferrite possesses uniform microstructure and excellent magnetic performance such asμi>5000at f≤530kHz in the temperature range from0to190℃,and Bs=530mT at25℃.

关 键 词：MNZN铁氧体 降温速率 正交实验 磁性能 

分 类 号：TM277.1[一般工业技术—材料科学与工程]