Abstract The effects of amorphous SiO2 coating onto FeSiCr alloy powder on the electric and magnetic properties were investigated. FeSiCr alloy powder with an average particle size of 10 μm was coated with nano-sized silica powder to increase the resistivity and DC bias superposition characteristics. Inexpensive water glass (sodium silicate) was used as the raw material to form the amorphous silica layer onto the FeSiCr alloy powder surface acting as a binding and insulation layer. The amorphous silica layer thickness was about 20 nm to 50 nm. The thickness can be controlled by the amount of sodium silicate addition. The amorphous silica layer can significantly promote anti-oxidation, resistivity and DC bias superposition characteristic of the FeSiCr alloy.

中文翻译：

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非晶SiO2改性FeSiCr合金粉末的电磁性能

摘要 研究了非晶SiO2涂层对FeSiCr合金粉体电、磁性能的影响。平均粒径为 10 μm 的 FeSiCr 合金粉末涂覆纳米二氧化硅粉末，以增加电阻率和直流偏置叠加特性。以廉价的水玻璃（硅酸钠）为原料，在 FeSiCr 合金粉末表面形成无定形二氧化硅层，作为粘合和绝缘层。无定形二氧化硅层厚度为约20nm至50nm。厚度可以通过添加硅酸钠的量来控制。非晶二氧化硅层可以显着提高FeSiCr合金的抗氧化性、电阻率和直流偏置叠加特性。