SnO_2掺杂对MnZn铁氧体微观结构和性能的影响  

Influence of SnO_2 Additive on the Microstructure and Properties of MnZn Power Ferrite

作　　者：张逸[1] 郑鹏[1] 张强原[1] 秦会斌[1] 杨已青[1] 郑梁[1] 

机构地区：[1]杭州电子科技大学电子信息学院,杭州310018

出　　处：《材料导报》2013年第10期53-56,共4页Materials Reports

基　　金：浙江省自然科学基金(Y107255);浙江省自然科学基金青年基金项目(LQ12E02001)

摘　　要：采用氧化物陶瓷工艺制备MnZn功率铁氧体,研究了SnO2掺杂对MnZn功率铁氧体微观结构及磁性能的影响。结果表明添加适量的SnO2可以有效提高晶粒均匀性和致密度。随着SnO2添加量的增加,起始磁导率先上升后下降,磁损耗先下降后上升。当添加量为0.5%(摩尔分数)时,μi达到最大值,损耗最低。此外,铁氧体损耗最低点所对应的温度随着SnO2掺杂量的增加向低温移动。通过对比一次掺杂和二次掺杂,发现一次掺杂的SnO2主要作用于晶粒内部,二次掺杂的SnO2主要作用于晶界处,而且一次掺杂所获得的样品性能更优。The MnZn power ferrites were prepared by the conventional oxide ceramic process. The influence of SnO2 addition on the microstructure and properties of MnZn power ferrite were studied. The results indicated that the proper addition of SnO2 can increase the uniformity and density of the grain. With the increasing of SnO2, the initial permeability increased initially and then decreased, while the losses changed conversely. When the addition was 0. 5mo1%, the MnZn power ferrites showed the highest initial permeability, while the power losses was lowest. Meanwhile, the corresponding temperature of the minimum loss moved to the lower temperature with the SnO2 additive increasing. By comparing the SnO2 adding before presintering and adding after presintering, it is found that the former mainly influenced grain internal, the latter mainly influenced grain boundary, and the property of the former was better.

关 键 词：MNZN铁氧体 SnO2掺杂 微观结构 

分 类 号：TM277[一般工业技术—材料科学与工程]