文档介绍：目录
摘要 I
Abstract II
1 引言 1
选题的依据及意义 1
磁粉芯的国内外研究现状及发展趋势 1
铁硅铝磁粉芯概述 2
铁硅铝磁粉芯应用 2
铁硅铝磁粉芯的研究意义 3
主要研究内容 3
2 实验方法 4
4
4
5
5
6
6
6
7
3 结果与讨论 7
7
9
10
FeSiAl磁粉芯的金相分析 14
4 结论及展望 16
铁硅铝复合磁粉芯的制备与性能研究
摘要
本文以200目铁硅铝粉体为原料,加入一定比例的脱模剂和绝缘剂,通过模压压制成型,成型压力为1002MPa,经合适的热处理工艺制备铁硅铝磁粉芯,重点研究了热处理温度、保温时间以及表面氧化处理对磁粉芯有效磁导率、损耗和抗偏流特性的影响。
研究结果表明,在550℃至700℃,有效磁导率随着温度的升高呈现先增大后减少的趋势,Q值相反;当热处理工艺为热处理温度650℃,保温1h时,磁粉芯的有效磁导率达到最大值72;并以此热处理条件作为下一步表面氧化处理对磁粉芯软磁性能影响的热处理工艺;研究发现,表面氧化处理对磁粉芯的磁性能影响很大,随着磷酸或碱含量的增多,磁粉芯的有效磁导率降低,抗偏流能力增强,Q值增大,即损耗减少;当磷酸和碱溶液加入量分别为3%时,%、%;当外加场强H为8000A/m时,未表面氧化处理的磁粉芯、加入3%磷酸、3%%、%、%。
关键词:铁硅铝; 磁粉芯; 热处理; 表面氧化处理
Study on preparation and property of FeSiAl ic powder cores
Abstract
In this paper, FeSiAl powder cores have been made by 200 mesh FeSiAl powder as raw material, adding a certain percentage of release agents and insulating agent, forming by molding suppress under the suppress of 1002MPa and by appropriate heat treatment process. Focus on the effects of heat treatment temperature, holding time and surface oxidation treatment on powder cores of effective permeability, loss and anti-bias characteristics.
The results show that, from 550 ° C to 700 ° C, the effective permeability first increases and then has a decreasing trend with increasing temperature, Q value is opposite; When the heat treatment temperature is 650 ° C, heat treatment time for 1h, μe of the ic powder cores reaches maximum and its value is 72; and using the heat treatment process conditions as the next stage of surface oxidation treatment on the soft ic properties of the ic powder cores. The study finds that the surface oxidation treatment on the ic powder cores can affect its ic propert