固化对纳米晶磁芯软磁性能影响的研究

Abstract

本文将单辊快淬法制备的Fe基非晶薄带绕成磁芯，经500℃退火2小时制成纳米晶磁芯，然后选用有机硅、聚氨酯和环氧树脂3种固化剂分别固化纳米晶磁芯。采用TD8120型软磁交流测试系统和TD8220-A型软磁直流测试系统，分别测试固化前后纳米晶磁芯的交、直流软磁性能。对比分析采用3种不同固化剂固化对纳米晶磁芯的矫顽力、磁导率、损耗等软磁参数的影响。研究结果表明，采用有机硅固化的纳米晶磁芯的直流软磁性能受固化影响最小，其直流软磁性能最好；采用聚氨酯固化的纳米晶磁芯的交流软磁性能受固化影响最小，其交流软磁性能最佳。固化成型是纳米晶磁芯制备的关键工艺，降低固化对纳米晶磁芯性能的影响具有重要的现实意义。本文研究结果对于纳米晶磁芯固化成型工艺的改进具有参考价值。 In this paper, the Fe base amorphous ribbons prepared by the single roll fast quenching method are wound into magnetic cores, and nanocrystalline cores are made by annealing at 500˚C for 2 hours. Then 3 kinds of curing agents, organosilicon, polyurethane and epoxy resin, are used to solidify nanocrystalline cores. Using TD8120 soft magnetic AC test system and TD8220-A soft magnetic DC test system, the AC and DC soft magnetic properties of nanocrystalline core before and after curing were respectively tested. The effects of 3 different curing agents on the coercivity, permeability, loss and other soft magnetic parameters of the nanocrystalline core are compared and analyzed. The results show that the soft magnetic properties of the nanocrystalline core with organosilicon solidified are the least affected by curing, and the best DC soft magnetic properties are obtained; the soft magnetic properties of the nanocrystalline core with polyurethane solidified are the least affected by curing, and the best AC soft magnetic properties are obtained. Solidification is the key technology for the preparation of nanocrystalline core; it is of great significance to reduce the effect of curing on the properties of nanocrystalline core. The results of this study have value for the improvement of the solidification process of nanocrystalline core.