粉末挤出成型纳米晶磁粉芯的脱脂与热处理研究
Degreasing and Heat Treatment of Nano-crystalline Magnetic Powder Core Moulded by Press Extrusion
胡雪松1, 杜 琰2, 朱正吼3
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作者单位：(1. 江西工业贸易职业技术学院 机电系, 江西 南昌 330031; 2. 江西中医学院 计算机系, 江西 南昌 330004; 3. 南昌大学 材料科学与工程学院, 江西 南昌 330031)
中文关键字：挤出成型； 磁粉芯； 热处理
英文关键字：press extrusion moulding; magnetic powder core; heat treatment
中文摘要：采用粉末挤出成型法制备了Fe73.5Cu1Nb3Si13.5B9纳米晶磁粉芯，讨论了脱脂及热处理对磁粉芯磁性能的影响。结果表明：“硬脂酸-聚丙烯-石蜡”粘接剂的粘接效果好、成型方便；在热处理时间相同时，保温时间越长，温度越高，纳米晶粉颗粒运动越充分，颗粒间的间隙减小得越小，磁导率上升得越多；磁粉芯经脱脂、热处理后纳米晶粉颗粒的间隙减小，使得磁粉芯涡流损耗上升和磁粉芯中心频率下移。
英文摘要：The effects of degreasing and heat treatment on the properties of Fe73.5Cu1Nb3Si13.5B9 nano-crystalline magnetic powder core which was moulded by press extrusion, were studied. The results show that “stearic acid-polypropylene-paraffin” adhesive formula has good bonding effects and easy formation. Under the same heat treatment time, the higher the temperature, the more fully the nano-crystalline particles move, the less the gap among particles reduce, which result in the higher μe. Degreasing and heat treatment can reduce the gap among nano-crystalline core particles, increase the vortex flowing loss and move down the frequency of core's center.