A Comparative Study of Insulators on Magnetic Properties of Sendust Based Nanocomposite Powder Cores

Subject Areas : Journal of Optoelectronical Nanostructures

Maryam Amoohadi ¹ , Morteza Mozaffari ² , Abdolrasoul Gharaati ³ , Mohammad Rezazadeh ⁴

1 - Department of Physics, Payamenoor University, Iran
2 - Department of Physics, Faculty of Science, University of Isfahan, Isfahan, Iran
3 - Department of Physics, Payamenoor University, Iran
4 - Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran

Received: 2018-07-08 Accepted : 2018-09-14 Published : 2018-10-01

Keywords: Soft Magnetic Composite Powder Cores, Epoxy Resin Insulator, Sodium Silicate Insulator, Magnetic Permeability, Q-Factor,

Abstract :

In this study, Sendust (Fe85Si9.6Al5.4) nanostructure alloy was prepared by
mechanical alloying and was characterized by X-ray diffraction. In addition, the alloy’s
morphology and its distribution particle size were investigated by scanning electron
microscopy method. The alloyed powders were insulated with 4wt% of three different
insulating materials including polyvinyl alcohol, epoxy resin, and sodium silicate. Then,
0.5 wt% zinc stearate was added as a lubricant and the composites were formed at a
pressure of 1600 MPa in a torodial die. These cores were annealed in Ar atmosphere at
350 to 450 ºC for 1 h. Some of the magnetic parameters of the as-milled and annealed
samples were measured and compared with each other in the frequency range of 4 to
1000 kHz. The results showed that polyvinyl alcohol is not a suitable insulating agent
for insulating this alloy. In addition, the real part of the initial magnetic permeability of
the magnetic powder core insulated by sodium silicate in comparison with that insulated
by epoxy resin is a bit smaller, but more reduction of the imaginary part of former
results in an increase the Q-factor throughout measuring frequency range. The results
show that annealing is more effective on improvement of the measured magnetic
properties of the samples insulated with sodium silicate than that insulated with epoxy
resin.

References:

[1] B.D. Cullity, C.D. Graham, Introduction to magnetic materials, 2nd ed., New Jersy: John Wiley & Sons, 2011, 439-440.
[2] H. Rutz, F. Hanejko, G. Ellis, N. Riverton. The manufacture of electromagnetic components by the powder metallurgy process. Presented at International Conference on Powder Metallurgy and Particulate Materials. (1997, Jun) 1-26. Available: www. Yuna media. Com/ www. Hoeg test. Com /Tech Papers v2 /47. Pdf
[3] A. Schoppa, P. Delarbre, E. Holzmann, M. Sigl. Magnetic properties of soft magnetic powder composites at higher frequencies in comparison with electrical steels. Presented at: Electric Drives Production Conference (EDPC), 2013 3rd International, IEEE. (2013, Oct) 1-5. Available: iee explore. Iee. Org/ iel7/ 6678895/ 6689673/ 06689717. Pdf
[4] J.F. Gieras, Advancements in electric machines, Germany: Springer Science & Business Media, 2008, 36-37.
[5] A.W. Chao, K.H. Mess, M. Tigner, F. Zimmermann, Handbook of accelerator physics and engineering, 2nd ed. New Jersy: World Scientific, 1999, 117.
[6] A. Goldman, Handbook of modern ferromagnetic materials, New York: Springer Science & Business Media, 2012, 197.
[7] K. Asaka, C. Ishihara. Technical trends in soft magnetic parts and materials. Hitachi Powdered Metals Technical Report. U.S.A., (2005, Jan.) 420053. Available: https:// www. research gate. net. / publication/287661000
[8] H. Shokrollahi, K. Janghorban. Soft magnetic composite materials (SMCs). Journal of Materials Processing Technology. 189 (2007, Jul.) 1-12. Available: https:// www. Science direct. Com/ science/ article/ pii/ S092401360700175
[9] L. Xiao, Y. Sun, C. Ding, L. Yang, L. Yu. Annealing effects on magnetic properties and strength of organic-silicon epoxy resin-coated soft magnetic composites. Proceedings of the Institution of Mechanical Engineers. Part C: Journal of Mechanical Engineering Science. 228 (2014, Dec.) 2049-2058. Available: Journals. Sagepub. Com/ doi/ abs/10.1177/0954406213515112
[10] S. Wu, A. Sun, F. Zhai, J. Wang, Q. Zhang, W. Xu, P. Logan, A.A. Volinsky. Annealing effects on magnetic properties of silicone-coated iron-based soft magnetic composites. Journal of Magnetism and Magnetic Materials. 324 (2012, Mar.) 818-822. Available: https:// www. Science direct. Com/ science/ article/ pii/ S0304885311006986
[11] M. Streckova, R. Bures, M. Faberova, L. Medvecky, J. Fuzer, P. Kollar. A comparison of soft magnetic composites designed from different ferromagnetic powders and phenolic resins. Chinese Journal of Chemical Engineering. 23 (2015, Apr.) 736-743. Avaiable: https:// www. Science direct. Com/ science/ article/ pii/ S1004954114003280
[12] S. Wu, A. Sun, Z. Lu, C. Cheng, X. Gao. Magnetic properties of iron-based soft magnetic composites with SiO2 coating obtained by reverse microemulsion method. Journal of Magnetism and Magnetic Materials. 381 (2015, May) 451-456. Available: https:// www. Science direct. Com/ science/ article/ pii/ S0304885315000414
[13] M. Huang, C. Wu, Y. Jiang, M. Yan. Evolution of phosphate coatings during high-temperature annealing and its influence on the Fe and FeSiAl soft magnetic composites. Journal of Alloys and Compounds. 644 (2015, Sep. ) 124-130. Available: https:// www. Science direct. Com/ science/ article/ pii/ S0925838815012402
[14] M. Yaghtin, A.H. Taghvaei, B. Hashemi, K. Janghorban. Effect of heat treatment on magnetic properties of iron-based soft magnetic composites with Al2O3 insulation coating produced by sol–gel method. Journal of Alloys and Compounds. 581 (2013, Dec. ) 293-297. Avaiable: https:// www. Science direct. Com/ science/ article/ pii/ S0925838813016095
[15] X. Peng, K. Peng, J. Huang. Synthesis and magnetic properties of core-shell structured Finemet/Ni Zn ferrite soft nanocomposites by co-precipitation Journal of Alloys and Compounds. 691 (2017, Jan.) 165-170. Available: https:// www. Science direct. Com/ science/ article/ pii/ S0925838816324811
[16] L. Hultman. Soft magnetic composites-properties and applications. PM TEC 2002, in Orlando, U.S.A., 2002-6, (2002, Jul. ) 1-13. Available: https:// www. Research gate. Net /.../ 4022788
[17] K.W. Bae, J., Byun, Method for manufacturing sendust core powder, U.S. patent 5,756,162 (1998) May. 26. Available: http://www.free patents on line. com
[18] B. Zuo, N. Saraswati, T. Sritharan, H. Hng. Production and annealing of nanocrystalline Fe–Si and Fe–Si–Al alloy powders. Materials Science and
A Comparative Study of Insulators on Magnetic Properties of Sendust Based … * 13
Engineering: A, 371 (2004, Apr.) 210-216. Available: https:// www. Science direct. Com/ science/ article/ pii/ S0921509303014576
[19] A. Taghvaei, H. Shokrollahi, M. Ghaffari, K. Janghorban. Influence of particle size and compaction pressure on the magnetic properties of iron-phenolic soft magnetic composites. Journal of Physics and Chemistry of Solids, 71 (2010, Jan.) 7-11. Available: https:// www. science direct. com/ science/ article/ abs/ pii/ S0022369709002364
[20] H. Shokrollahi, K. Janghorban. The effect of compaction parameters and particle size on magnetic properties of iron-based alloys used in soft magnetic composites. Materials Science and Engineering: B, 134 (2006, Sep) 41-43. Available: https:// www. Science direct.Com/science/article/pii/ S0921510706004090.
[21] M. amoohadi, M. mozaffari, A.R. Gharaati, M. rezazadeh. An Investigation of the Magnetic Properties of Iron-based Soft Magnetic Composites Coated by Sodium Silicate Insulator. Journal of Advanced Materials In Engineering, 37 (2018, Jan) 97-104. Available: https://jame.iut.ac.ir/article-1-898-en.html
[22] F. Fiorillo, Measurement and characterization of magnetic materials, Amestwdam: Elsevier, 2004, 427.
[23] E. Snelling, Ferrites for Inductors and Transformers, London: Butter worth and Co, 1983, 47-70.
[24] L. Lutterotti. Total pattern fitting for the combined size–strain–stress–texture determination in thin film diffraction. Nuclear Instruments and Methods in Physics Research Section B, Beam Interactions with Materials and Atoms, 268 (2010, Feb.) 334-340. Avaiable: https:// www. Science direct. Com/ science/ article/ pii/ S0168583X09010428
[25] Y. Liu, Y. Yi, W. Shao, Y. Shao. Microstructure and magnetic properties of soft magnetic powder cores of amorphous and nanocrystalline alloys. Journal of Magnetism and Magnetic Materials, 330 (2013, Mar.) 119-133. Avaiable: https:// www. Science direct. Com/ science/ article/ pii/ S0304885312008657
[26] B.D. Cullity, C.D. Graham, Introduction to magnetic materials, 2nd ed. New Jersy: John Wiley & Sons, 2011, 73-76.
[27] A.H. Taghvaei, H. Shokrollahi, K. Janghorban, Structural studies, magnetic properties and loss separation in iron–phenolicsilane soft magnetic composites, Materials and Design, 31 (2010, Jan. ) 142-148. Avaiable in: https:// www. Science direct. Com/ science/ article/ pii/ S0261306909003392
[28] H. Shokrollahi, K. Janghorban. Different annealing treatments for improvement of magnetic and electrical properties of soft magnetic composites. Journal of Magnetism and Magnetic Materials. 317 (2007, Oct. ) 61-67. Avaiable: https:// www. Science direct. Com/ science/ article/ pii/ S030488530700604X
[29] Q.D. Li, X. Dong, T. Liu, J.H. You, F.Z. Lian. Research on Preparation and Properties of Fe-Si-Al Soft Magnetic Composites. in: Advanced Materials Research, Trans Tech Publ. (2011, Jul.) 173-178. Avaiable: https:// www. Scientific. Net/ AMR. 298.173