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MnO_2掺杂Ni-Zn铁氧体的微观结构及磁性能
  • ISSN号：1003-6326
  • 期刊名称：《中国有色金属学报：英文版》
  • 时间：0
  • 分类：TG146[金属学及工艺—金属材料;一般工业技术—材料科学与工程;金属学及工艺—金属学]
  • 作者机构：[1]电子科技大学电子薄膜与集成器件国家重点实验室,成都610054
  • 相关基金：Projects（50702011 60721001）supported by the National Natural Science Foundation of China
作者： 苏桦[1], 张怀武[1], 唐晓莉[1], 荆玉兰[1]
关键词： NI-ZN铁氧体, MNO2, 掺杂, 磁性能, Ni-Zn ferrite, MnO2, doping, magnetic properties
中文摘要：

为了改善Ni-Zn铁氧体材料的功率损耗特性,基于固相反应烧结法研究MnO2掺杂对Ni-Zn铁氧体综合性能的影响。研究发现,在0～2.0%（质量分数）掺杂范围内,MnO2不会影响铁氧体的单相结构。而Ni-Zn铁氧体的平均晶粒尺寸、烧结密度以及磁导率都随着MnO2掺杂量的增加而逐渐下降,同时,铁氧体的电阻率持续上升。饱和磁化强度（单位质量产生的磁矩）先随着0.4%MnO2的掺入略有上升,而后随着MnO2掺杂量的增加持续下降,这主要是受金属离子占位及超交换作用力变化的影响。当测试频率低于1MHz时,铁氧体的功耗（Pcv）随着MnO2掺杂量的增加持续上升,而当测试频率超过1MHz后,涡流损耗在总损耗中逐渐占主导地位,电阻率越高的样品越有利于获得低功耗,但这一规律对于2.0%MnO2掺杂的样品不适用。总体而言,当频率低于1MHz时,不掺杂MnO2的Ni-Zn铁氧样品能够获得更低的功耗;而当频率超过1MHz后,掺杂1.6%MnO2的Ni-Zn铁氧体能够获得最低的功耗。

英文摘要：

To improve the performance of Ni-Zn ferrites for power field use,the influence of MnO2 additive on the properties of Ni-Zn ferrites was investigated by the conventional powder metallurgy.The results show that MnO2 does not form a visible second phase in the doping mass fraction range of（0-2.0%）.The average grain size,sintering density and real permeability gradually decrease with the increase of the MnO2 content.And the DC resistivity continuously increases with the increase of MnO2 content.The saturation magnetization（magnetic moment in unit mass） first increases slightly when mass fraction of MnO2 is less than 0.4% MnO2,and then gradually decreases with increasing the MnO2 mass fraction due to the exchange interaction of the cations.When the excitation frequency is less than 1 MHz,the power loss（Pcv） continuously increases with increasing the MnO2 content due to the decrease of average grain size.However,when the excitation frequency exceeds 1 MHz,eddy current loss gradually becomes the predominant contribution to Pcv.And the sample with a higher resistivity favors a lower Pcv,except for the sample with 2.0% MnO2.The sample without additive has the best Pcv when worked at frequencies less than 1 MHz;and the sample with 1.6% MnO2 additive has the best Pcv when worked at frequencies higher than 1 MHz.

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期刊信息
  • 《中国有色金属学报：英文版》
  • 中国科技核心期刊
  • 主管单位:中国科学技术协会
  • 主办单位:中国有色金属学会
  • 主编：黄伯云
  • 地址：中国长沙中南大学
  • 邮编：410083
  • 邮箱：f-xsxb@csu.edu.cn
  • 电话：0731-88830949
  • 国际标准刊号：ISSN：1003-6326
  • 国内统一刊号：ISSN：43-1239/TG
  • 邮发代号:42-317
  • 获奖情况:
  • 国家“双百”期刊,第二届全国优秀科技期刊评比二等奖,中国有色金属工业总公司优秀科技期刊一等奖
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  • 被引量:1159