采用气相扩散沉积的方法对铁镍钼合金粉体进行绝缘包覆,金属硅粉先经氯化生成三氯氢硅蒸汽,接着进行水解得到二氧化硅,从而在铁镍钼软磁合金粉体表层沉积形成绝缘膜层。研究了工艺参数对包覆效果的影响并对其进行了优化。结果表明,硅粉...采用气相扩散沉积的方法对铁镍钼合金粉体进行绝缘包覆,金属硅粉先经氯化生成三氯氢硅蒸汽,接着进行水解得到二氧化硅,从而在铁镍钼软磁合金粉体表层沉积形成绝缘膜层。研究了工艺参数对包覆效果的影响并对其进行了优化。结果表明,硅粉沉积和水解过程中氩气最优流速分别为100 m L/min和50 m L/min,最优氯化锌和金属硅粉添加量分别为3wt%和4wt%。在此工艺条件下,铁镍钼软磁合金粉体绝缘包覆层均匀致密且具有耐高温、高电阻率特点。展开更多
Fe-6.5Si soft magnetic composites(SMCs)with hybrid phosphate-silica insulation coatings have been designed to improve their comprehensive property via chemical coating combining sol-gel method in this work.The microst...Fe-6.5Si soft magnetic composites(SMCs)with hybrid phosphate-silica insulation coatings have been designed to improve their comprehensive property via chemical coating combining sol-gel method in this work.The microstructure and magnetic performance of the Fe-6.5Si SMCs with hybrid phosphate-silica insulation coatings were investigated.The hybrid phosphate-silica coatings with high heat resistance and high withstand pressure,formed on the surface of the Fe-6.5Si ferromagnetic powders,were found stable in the composites.Compared with Fe-6.5Si SMCs coated by single phosphate or single silica,Fe-6.5Si SMCs with hybrid phosphate-silica show much higher permeability and lower core loss.The work provides a new way to optimize the magnetic performance of soft magnetic composites.展开更多
文摘采用气相扩散沉积的方法对铁镍钼合金粉体进行绝缘包覆,金属硅粉先经氯化生成三氯氢硅蒸汽,接着进行水解得到二氧化硅,从而在铁镍钼软磁合金粉体表层沉积形成绝缘膜层。研究了工艺参数对包覆效果的影响并对其进行了优化。结果表明,硅粉沉积和水解过程中氩气最优流速分别为100 m L/min和50 m L/min,最优氯化锌和金属硅粉添加量分别为3wt%和4wt%。在此工艺条件下,铁镍钼软磁合金粉体绝缘包覆层均匀致密且具有耐高温、高电阻率特点。
基金Projects(2020GDSYL-20200402008,2018GDASCX-0117)supported by GDAS’Project of Science and Technology Development,ChinaProjects(2015B010136004,2019A1515010886)supported by Science and Technology Planning Project of Guangdong Province of ChinaProject(1920001001392)supported by Key Technology Project of Foshan,China。
文摘Fe-6.5Si soft magnetic composites(SMCs)with hybrid phosphate-silica insulation coatings have been designed to improve their comprehensive property via chemical coating combining sol-gel method in this work.The microstructure and magnetic performance of the Fe-6.5Si SMCs with hybrid phosphate-silica insulation coatings were investigated.The hybrid phosphate-silica coatings with high heat resistance and high withstand pressure,formed on the surface of the Fe-6.5Si ferromagnetic powders,were found stable in the composites.Compared with Fe-6.5Si SMCs coated by single phosphate or single silica,Fe-6.5Si SMCs with hybrid phosphate-silica show much higher permeability and lower core loss.The work provides a new way to optimize the magnetic performance of soft magnetic composites.
