柔性固化剂固化工艺对纳米晶铁芯性能的影响
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摘要
用非晶带材绕制成圆环铁芯,经退火制备纳米晶铁芯,再放入环氧树脂柔性固化剂中进行真空浸渍后于干燥箱中固化。采用正交试验研究了固化工艺对纳米晶铁芯可切割性和磁性能的影响。结果表明,真空浸渍条件下,固化剂能够充分填充铁芯带材间隙,铁芯固化后具有优异的可切割性;铁芯损耗的主要影响因素是固化温度,最佳固化工艺为:固化温度353 K,固化时间180 min,填料比例10%。该工艺固化的铁芯损耗相对较低:P1/1k=7.319W/kg,P0.5/10k=20.888 W/kg,磁感应强度(H=7 A/m)下降20%,起始磁导率μi下降55%,最大磁导率μmax下降40%;在f=50Hz～1 kHz范围内,固化剂的固化收缩对铁芯电感影响较大,通过调整固化工艺能够有效降低固化收缩对铁芯电感的影响;而在f=1～100 kHz范围内,固化剂对铁芯电感影响较小,对电感变化率影响甚小。
The influence of curing process of epoxy resin flexible adhesive on the cuttability and magnetic properties of nano-crystalline cores was studied. The results show that the core has excellent cutting property when the adhesive can be fully impregnated with the core gap in the condition of vacuum. The orthogonal test analysis shows that the main influence factor of the core loss is the curing temperature. The optimal curing process is such: temperature of 353 K, time of 180 min, and packing precent of 10 %. The corresponding core loss was lowest: P1/1 k = 7.319 W/kg, P0.5/10 k= 20.888 W/kg, the magnetic fluxin density(H=7 A/m) decreased by 20 %, the initial permeability decreased by 55 % and the maximum permeability decreased by40 %. Under f=50 Hz to 1 kHz, the curing shrinkage of the adhesive has great influence on the inductance. The influence of curing shrinkage on the inductance can be reduced through adjusting the curing process. Under f=1 to 100 kHz, the adhesive has little influence on the inductance as same as through adjusting the curing process for the inductance change rate.
The influence of curing process of epoxy resin flexible adhesive on the cuttability and magnetic properties of nano-crystalline cores was studied. The results show that the core has excellent cutting property when the adhesive can be fully impregnated with the core gap in the condition of vacuum. The orthogonal test analysis shows that the main influence factor of the core loss is the curing temperature. The optimal curing process is such: temperature of 353 K, time of 180 min, and packing precent of 10 %. The corresponding core loss was lowest: P1/1 k = 7.319 W/kg, P0.5/10 k= 20.888 W/kg, the magnetic fluxin density(H=7 A/m) decreased by 20 %, the initial permeability decreased by 55 % and the maximum permeability decreased by40 %. Under f=50 Hz to 1 kHz, the curing shrinkage of the adhesive has great influence on the inductance. The influence of curing shrinkage on the inductance can be reduced through adjusting the curing process. Under f=1 to 100 kHz, the adhesive has little influence on the inductance as same as through adjusting the curing process for the inductance change rate.
引文
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[2]HasegawA R.Applications of amorphous magnetic alloys[J].Mater Sci Eng A,2004,375:90-97.
[3]Yoshizawa Y,Oguma S,Yamauchi K.New Fe-based soft magnetic alloys compose of ultrafine grain structure[J].JAppl Phys,1988,64(10):6044-6046.
[4]陆伟,严彪,殷俊林.纳米晶软磁材料及其应用[J].上海钢研,2003,(4):3-11.
[5]Sahingoz R,Erol M,Gibbs M R J.Observation of changing of magnetic properties and microstructure of metallic glass Fe78Si9B13 with annealing[J].J Magn Magn Mater,2004,271(1):74-78.
[6]Wang L,Zhang S,Sun Z,et al.Structure design and properties of amorphous filter reactors[J].Mater Manuf Proc,2012,27(11):1229-1232.
[7]黄书林,李山红,余军,等.适用于非晶电机定子铁心的环氧树脂及其固化剂[J].工程塑料应用,2011,39(1):104-106.
[8]全白云.非晶铁芯浸渍切割工艺进展[J].金属功能材料,1998,5(6):241-247.
[9]李映雪,丘渝青.浸渍固化和切割气隙对非晶铁芯磁性能的影响[J].金属功能材料,1996,(1):21-23.
[10]周佳麟,范和平.环氧树脂柔性固化剂研究综述[J].化学推进剂与高分子材料,2006,4(3):13-16.
[11]刘凤芹,兰荣鑫,李晓雨.退火温度对铁基纳米晶带材伏安特性的影响[J].磁性材料及器件,2013,44(2):56-57.
[12]傅婧.高弹性环氧胶黏剂的研制[D].北京:北京化工大学,2009.
[13]李和平.胶黏剂配方工艺设计[M].北京:化学工业出版社,2010,37-40.
[14]张宁娜,王立军.FeCuNbSiB系列纳米晶软磁合金应力敏感性的研究概述[J].金属功能材料,2009,16(6):45-49.
[15]盛江峰,陈雁芳,琚小双,等.非等温DSC法研究环氧树脂固化反应动力学过程[J].中国胶粘剂,2013,22(6):9-12.
[16]钱坤明,丁昂,纪松,等.固化工艺对铁基纳米晶软磁材料磁性能的影响[J].兵器材料科学与工程,2011,34(4):45-47.
[17]唐冬冬,刘天成,黄纯波,等.树脂固化制度对非晶浸漆铁芯软磁性能的影响[J].磁性材料及器件,2015,46(2):25-29.