铁硅铝磁粉芯的绝缘包覆研究  

Investigation of Coating Process of Fe-Si-Al Powder Core

作　　者：林坤[1] 熊亚东[1] 严密[1] 张念伟[1] 徐伟[1] 郭婷[1] 姜银珠[1] 

机构地区：[1]浙江大学,浙江杭州310027

出　　处：《稀有金属材料与工程》2014年第5期1262-1265,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51102213)

摘　　要：研究了钝化工艺及不同无机粘结剂对铁硅铝磁粉芯性能的影响。铁硅铝粉末用0.4%(质量分数,下同)的磷酸液钝化,用0.9%的玻璃粉粘结,在1980 MPa下压制成环形样品,700℃氮气气氛保护下退火热处理1 h所制备的铁硅铝磁粉芯综合性能最佳。其有效磁导率可达125.98,50 kHz/100 mT下的体积损耗为316.7 mW/cm3。综合磁性能和有机粘结剂制备的铁硅铝磁粉芯相当,但可以大大提高样品的径向抗拉强度,达到261 N,无需固化处理。同时提高了磁粉芯在使用过程中的抗老化能力。The effect of phosphate passivation and different inorganic adhesives on properties of Fe-Si-A1 powder core was investigated.When the Fe-Si-Al magnetic powder core is made from the powder passivated in 0.4 wt% phosphoric acid solution, coated with 0.9 wt% oflow melting point glass powder, compacted under 1980 MPa and annealed at 700 ℃ for 1 h in N2 atmosphere, it presents the optimummagnetic properties. Its effective permeability is 125.98, the total core loss is 316.7 mW/cm3 （f=50 kHz, Bm=100 mT）. Besides, tensilestrength of the core is 261 N. Meanwhile, it improves the anti-aging ability of Fe-Si-Al powder core during using.

关 键 词：磁粉芯 有效磁导率 无机粘结剂 损耗 抗拉强度 

分 类 号：TM274[一般工业技术—材料科学与工程]