According to our experimental results, by adopting appropriate processes, a core loss of 390 mW/cm³ can be achieved at a magnetic field strength of 0.1 T and a frequency of 50 kHz. At the same time, under low frequency conditions, the effective permeability μeff of the Permalloy core can remain relatively stable under certain conditions. These properties make the Permalloy core compatible with the properties of well-known soft magnetic materials such as Fe-Si-Al and Ni-Fe alloys.
From the above experimental results, it can be concluded that Fe-Si alloy powder with high silicon content has high value in the commercialization and application of related devices.
LE Alloy 49 can be widely used in solenoid components, glass-to-metal seals, transformers, power sensors, etc. It is an iron-cobalt-vanadium soft magnetic alloy with high saturation magnetic induction intensity among existing soft magnetic alloys. Its saturation magnetic induction intensity can reach 2.4 T, and its Curie temperature is relatively high (980ºC), but its saturation magnetostriction coefficient is relatively large (60~100 × 10⁻⁶).
Due to the high saturation magnetic induction intensity of the alloy, the size of the motor can be significantly reduced when manufacturing a motor of the same power; when manufacturing an electromagnet, a greater suction force can be generated under the same cross-sectional area. In addition, due to its high Curie point, the alloy can still maintain good magnetic stability even when other soft magnetic alloy materials are completely demagnetized at high temperatures.
However, the alloy has a low resistivity of 0.27μΩ·m, which is not suitable for use in high-frequency environments. It is also expensive, easily oxidized, and has poor processing performance. Its processing performance can be improved by adding an appropriate amount of nickel or other elements. The alloy is suitable for manufacturing lightweight devices.