固化剂对非晶纳米晶铁芯磁性能的影响

Effect of curing agent on magnetic properties of amorphous and nanocrystalline cores

研究了固化剂对非晶纳米晶带材制作的铁芯磁性能的影响规律。结果表明,在不同粘度条件下,固化剂的热膨胀系数随温度的增加而增加,但存在两个转折点,这与其中发生的晶型转变有十分密切的关系;随着固化剂粘度增加,非晶铁芯和纳米晶铁芯的损耗变化率增加,磁导率变化率先增大后减小,这主要是由于在不同粘度下固化剂的膨胀系数不同导致铁芯内应力不同而引起铁芯磁性能的变化。本研究中,非晶和纳米晶铁芯在粘度为90 MPa·s时,损耗及磁导率变化值较低。

The influence law of curing agent on the magnetic properties about cores which were made from amorphous and nanocrystalline strip was studied. The results show that the thermal expansion coefficient increases with the increase of temperature under the condition different viscosity,but there are two turning points,which have a very close relationship with crystal transformation. The variation rate of core loss for the amorphous and nanocrystalline cores increases with the increase of curing agent viscosity,and variation of magnetic permeability increases first and then decreases. That is because different expansion coefficients of curing agent under different viscosity leads to core stress deviation and variations of magnetic property. In this study,the variation rate of core loss and magnetic permeability are relatively low for the amorphous and nanocrystalline cores under the viscosity 90 MPa·s.