Preparation and properties of iron based soft magnetic composites coated with mixed resin
-
摘要:
仅采用单一成分的树脂进行有机绝缘包覆,只能在高温稳定性与粘结性能间进行选择,往往会出现“短板”。而尝试多组分共混树脂进行包覆可以得到较优的综合性能,从而拓宽铁基磁粉芯高温适用性。本文通过环氧树脂对有机硅树脂进行共混改性,采用共混改性的树脂对磷化处理后的羰基铁粉进行有机绝缘包覆,并通过对磁粉进行压制成型及固化处理制备成铁基磁粉芯。共混树脂通过形成有效的包覆层结构,减少粉末颗粒在压制过程所引入的应变,同时隔离颗粒间的接触以切断涡流,使所制备的磁粉芯密度达到6.82 g/cm3、电阻率高达1.1×106 Ω·cm,并提高了品质因数,降低了高频损耗。当共混树脂由33.3wt.%环氧树脂与66.7wt.%有机硅树脂组成时,铁基磁粉芯的综合性能最佳,在200 kHz下的功率损耗仅为1182.7 kW/m3。通过选用合适成分的共混树脂包覆剂,进一步优化铁基磁粉芯的磁性能,在中高频领域具有广阔的应用前景。 不同成分配比树脂包覆磁粉芯的功率损耗:(a) 随频率变化;(b) 随树脂成分变化 Abstract: With the rapid development of mobile communication, intelligent manufacturing, automotive electronics, electronic new energy and other emerging fields, reducing the magnetic loss and improving other properties of SMCs are required. The silicone resin mixed with epoxy resin was used to coat the phosphatized carbonyl iron powder (CIP). And the coated powders were fabricated into iron based soft magnetic composites (SMCs) through compression and curing. The effects of different mixed resins on the microstructure and electromagnetic properties of iron-based SMCs were studied. The results show that the mixed resin has been formed a reasonable coating layer on the surface of powders, which leads to reduce the strain of the powders introduced during compression and isolate the powders to cut off the eddy current. As a result, the density of SMCs can reach 6.82 g/cm3, the resistivity is as high as 1.1×106 Ω·cm. Meanwhile, its quality factor is improved and the magnetic loss at high frequency is reduced. When the mixed resin is composed of 33.3wt.% epoxy resin and 66.7wt.% silicone resin, the SMCs are provided with optimal comprehensive performance with 1182.7 kW/m3 loss only at 200 kHz. The magnetic properties of iron-based SMCs are further optimized through selecting the blending resin coating agent with suitable composition, which has a broad application prospect in the field of medium and high frequency.-
Key words:
- Soft magnetic composites /
- Mixed resin /
- Insulation coating /
- Magnetic loss /
- Quality factor
-
图 1 不同成分配比树脂包覆后粉末的SEM图: (a) SMCs;(b) 16.7 wt.%EP/SMCs;(c) 33.3 wt.%EP/SMCs;(d) 50.0 wt.%EP/SMCs;(e) 83.3 wt.%EP/SMCs;(f) 100.0 wt.%EP/SMCs
Figure 1. SEM images of the powders coated with different mixed resins: (a) SMCs;(b) 16.7 wt.%EP/SMCs;(c) 33.3 wt.%EP/SMCs;(d) 50.0 wt.%EP/SMCs;(e) 83.3 wt.%EP/SMCs;(f) 100.0 wt.%EP/SMCs
图 2 不同成分配比树脂包覆磁粉芯的断面SEM图:(a) SMCs;(b) 16.7 wt.%EP/SMCs;(c) 33.3 wt.%EP/SMCs;(d) 50.0 wt.%EP/SMCs;(e) 83.3 wt.%EP/SMCs;(f) 100.0 wt.%EP/SMCs
Figure 2. Fracture surface morphology of the SMCs based on the powders coated with different mixed resins: (a) SMCs;(b) 16.7 wt.%EP/SMCs;(c) 33.3 wt.%EP/SMCs;(d) 50.0 wt.%EP/SMCs;(e) 83.3 wt.%EP/SMCs;(f) 100.0 wt.%EP/SMCs
表 1 共混树脂成分配比
Table 1. Ingredients list of the mixed resin
Samples number SMCs 16.7wt.%EP/SMCs 33.3wt.%EP/SMCs 50.0wt.%EP/SMCs 66.7wt.%EP/SMCs 83.3wt.%EP/SMCs 100.0wt.%EP/SMCs Epoxy resin:Silicone resin (mass ratio) 0∶1 1∶5 1∶2 1∶1 2∶1 5∶1 1∶0 Epoxy percent/wt.% 0.0 16.7 33.3 50.0 66.7 83.3 100.0 -
[1] GUTFLEISCH O, WILLARD M A, BRUCK E, et al. Magnetic materials and devices for the 21 st century: stronger, lighter, and more energy efficient[J]. Advanced Materials,2011,23(7):821-842. doi: 10.1002/adma.201002180 [2] 白国华. 磁性材料: 现代工业的基础功能材料——磁性及相关功能材料分论坛侧记[J]. 中国材料进展, 2019, 38(10):2.BAI Guohua. Magnetic materials: Basic functional materials for modern industry - a side note on magnetic and related functional materials sub-forum[J]. Materials China,2019,38(10):2(in Chinese). [3] SHOKROLLAHI H, JANGHORBAN K. Soft magnetic composite materials (SMCs)[J]. Journal of Materials Processing Technology,2007,189(1-3):1-12. doi: 10.1016/j.jmatprotec.2007.02.034 [4] HSIANG H I, FAN L F, HUNG J J. Phosphoric acid addition effect on the microstructure and magnetic properties of iron-based soft magnetic composites[J]. Journal of Magnetism and Magnetic Materrials,2018,447:1-8. doi: 10.1016/j.jmmm.2017.08.096 [5] 蔡平平, 梁金坤, 徐文正, 等. 磷化工艺对FeSiCr软磁粉体性能影响的研究[J]. 机械研究与应用, 2017, 30(5):58-60+64. doi: 10.16576/j.cnki.1007-4414.2017.05.015CAI Pingping, LIANG Jingkun, XU Wenzheng, et al. Study on the effect of phosphating process on the performance of FeSiCr soft magnetic powders[J]. Mechanical Research and Application,2017,30(5):58-60+64(in Chinese). doi: 10.16576/j.cnki.1007-4414.2017.05.015 [6] PENG Y, YI Y, LI L, et al. Iron-based soft magnetic composites with Al2O3 insulation coating produced using sol–gel method[J]. Materials and Design,2016,109:390-395. doi: 10.1016/j.matdes.2016.07.097 [7] LIU L, YUE Q, LI G Q, et al. Influence of SiO2 insulation layers thickness distribution on magnetic behaviors of Fe-Si@SiO2 soft magnetic composites[J]. Journal of Physics Chemistry of Solids,2019,132:76-82. doi: 10.1016/j.jpcs.2019.04.016 [8] TAGHVAEI A H, EBRAHMI A, GHAFFARI M, et al. Magnetic properties of iron-based soft magnetic composites with MgO coating obtained by sol-gel method[J]. Journal of Magnetism and Magnetic Materrials,2010,322(7):808-813. doi: 10.1016/j.jmmm.2009.11.008 [9] ZHANG Q, ZHANG W, PENG K. In-situ synthesis and magnetic properties of core-shell structured Fe/Fe3O4 composites[J]. Journal of Magnetism and Magnetic Materrials,2019,484:418-423. doi: 10.1016/j.jmmm.2019.04.053 [10] ZHOU B, DONG Y, LIU L, et al. Enhanced soft magnetic properties of the Fe-based amorphous powder cores with novel TiO2 insulation coating layer[J]. Journal of Magnetism and Magnetic Materials,2019,474:1-8. doi: 10.1016/j.jmmm.2018.11.014 [11] 林坤, 熊亚东, 严密, 等. 铁硅铝磁粉芯的绝缘包覆研究[J]. 稀有金属材料与工程, 2014, 43(5):1262-1265.LIN Kun, XIONG Yadong, YAN Mi, et al. Insulation cladding of iron-silicon aluminum magnetic powder cores[J]. Rare Metal Materials and Engineering,2014,43(5):1262-1265(in Chinese). [12] DIAS M M, MOZETIC H J, BARBOZA J S, et, al. Influence of resin type and content on electrical and magnetic properties of soft magnetic composites (SMCs)[J]. Powder Technology,2013,237:213-220. doi: 10.1016/j.powtec.2013.01.006 [13] SHOKROLLAHI H, JANGHORBAN K, MAZALEYRAT F, et al. Investigation of magnetic properties, residual stress and densification in compacted iron powder specimens coated with polyepoxy[J]. Materials Chemistry and Physics,2009,114(2-3):588-594. doi: 10.1016/j.matchemphys.2008.10.013 [14] PERIGO E A, NAKAHARA S, PITTINI-YAMADA Y, et al. Magnetic properties of soft magnetic composites prepared with crystalline and amorphous powders[J]. Journal of Magnetism and Magnetic Materrials,2011,323(15):1938-1944. doi: 10.1016/j.jmmm.2011.02.025 [15] DIBAK S, FUZER J, KOLLAR P, et al. Interplay of domain walls and magnetization rotation on dynamic magnetization process in iron/polymer-matrix soft magnetic composites[J]. Journal of Magnetism and Magnetic Materrials,2017,426:320-327. doi: 10.1016/j.jmmm.2016.11.084 [16] CHEN Y, ZHANG L, SUN H, et al. Enhanced magnetic properties of iron-based soft magnetic composites with phosphate-polyimide insulating layer[J]. Journal of Alloys and Compounds,2020,813:152205. doi: 10.1016/j.jallcom.2019.152205 [17] WU S, SUN A Z, ZHAI F Q, et al. Annealing effects on magnetic properties of silicone-coated iron-based soft magnetic composites[J]. Journal of Magnetism and Magnetic Materrials,2012,324(5):818-822. doi: 10.1016/j.jmmm.2011.09.026 [18] 安迪, 闫亮明, 李伟健, 等. 软磁复合材料用胶黏剂配方的研究[J]. 粉末冶金工业, 2017, 27(3):35-39. doi: 10.13228/j.boyuan.issn1006-6543.20160041AN Di, YAN Liangming, LI Weijian, et al. Study on the formulation of adhesives for soft magnetic composites[J]. Powder Metallurgy Industry,2017,27(3):35-39(in Chinese). doi: 10.13228/j.boyuan.issn1006-6543.20160041 [19] PAN D, LI D, HAN H, et al. Study on the preparation and magnetic properties of Fe-Si-Cr soft magnetic composite with silicone resin[J]. Materials Research Express,2018,6(3):036103. doi: 10.1088/2053-1591/aaf32f [20] WU S, FAN J, LIU J, et al. Synthesis and magnetic properties of soft magnetic composites based on silicone resin-coated iron powders[J]. Journal of Superconductivity and Novel Magnetism,2017,31(2):587-595. [21] 王迅, 黄艳华, 孙文艳, 等. 硅树脂的绝缘性及耐热性[J]. 有机硅材料, 2007, 21(1):4. doi: 10.3969/j.issn.1009-4369.2007.01.006WANG Xun, HUANG Yanhua, SUN Wenyan, et al. Insulation and heat resistance of silicone resins[J]. Silicone Material,2007,21(1):4(in Chinese). doi: 10.3969/j.issn.1009-4369.2007.01.006 [22] TAGHVAEI A H, SHOKROLLAHI H, GHAFFARI M, et al. Influence of particle size and compaction pressure on the magnetic properties of iron-phenolic soft magnetic composites[J]. Journal of Physics Chemistry Solids,2010,71(1):7-11. doi: 10.1016/j.jpcs.2009.08.008 [23] 刘松山. 对谐振电路品质因数定义的再认识[J]. 西南师范大学学报:自然科学版, 2014, 39(9):5.LIU Songshan. Re-conceptualization of the definition of quality factor of resonant circuits[J]. Journal of Southwest Normal University:Natural Sciences Edition,2014,39(9):5(in Chinese). [24] 王耕福. 软磁铁氧体磁心应用与设计(二)[J]. 国际电子变压器, 2008, 09:114-120.WANG Gengfu. Application and design of soft ferrite cores (II)[J]. International Electronic Transformers,2008,09:114-120(in Chinese). [25] KOLLÁR P, BIRčÁKOVÁ Z, FÜZER J, et al. Power loss separation in Fe-based composite materials[J]. Journal of Magnetism and Magnetic Materials,2013,327:146-150. doi: 10.1016/j.jmmm.2012.09.055 -

计量
- 文章访问数: 46
- HTML全文浏览量: 22
- 被引次数: 0