Study of sm2co17 binary composite bonded permanent magnets 17二元复合粘结永磁材料的研究
Work is focused on understanding the macroscopic properties in terms of microscopic mechanisms, in the novel binary composite with different geometric ( shape and size ), electrical and magnetic particles 颗粒的复合材料。我们重点研究了这两类不同几何形状和大小、自旋极化和导电性能相差甚远的两相复合材料的磁输运性质。
The br ( bh ) max of the binary composite bonded magnets and its single component obey the law of dilution . the interaction between magnetic particles is stronger when smco is compounded with other three permanent magnetic materials 复合粘结永磁材料的br、(bh)max与单个永磁材料的性能呈简单的稀释规律;smco和其它三种永磁材料复合时,磁粉之间的相互作用较强。
The reversible temperature coefficient of magnetic flux of ndfeb-ferrite composite bonded magnets as a function of the content of ferrite is concave downwards, and that of ainico-ferrite magnets as a function of the content of ferrite is convex upwards, the reversible temperature coefficient of magnetic flux of the other four binary composite bonded magnets and its single component follow the pattern of linear relationship 钕铁硼和铁氧体复合粘结磁体的磁通可逆温度系数与铁氧体含量的关系曲线下凹,铝镍钴和铁氧体复合粘结磁体的磁通可逆温度系数和铁氧体含量的关系曲线上凸,其余四组复合粘结磁体的温度系数随着单一磁粉含量变化基本呈直线关系。
In this thesis, through the technique's of compressing molding, the processing parameter and the mixture ratio of magnetic powder on magnetic properties of four kinds of binary composite bonded magnets ( ndfeb alnico ferrite smco ) were studied . the experiment results were analyzed by the method of polynomial fit . the following major achievements were attained 本文采用模压成型工艺对常见的四大永磁材料??钕铁硼、铝镍钴、铁氧体、钐钴进行了两两复合粘结,研究了工艺参数及磁粉配比对磁性能和温度系数的影响,并通过计算机软件进行拟合分析,得到了如下主要结果。