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Influence of CaO and SiO2 co-doping on the magnetic, electrical properties and microstructure of a Ni–Zn ferrite

Effect of CaO and SiO2 additions on the grain growth and magnetic and electrical properties of a Ni-Zn ferrite was studied. The common oxides (x = 0.4CaO + 0.8SiO2) were added in different moles (x = 0, 0.02, 0.06, 0.012, 0.24 and 0.48) to Fe2O3, Zn, and NiO. The mixed powders were mechanically allo...

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Main Authors: Hajalilou, Abdollah, Hashim, Mansor, Kahrizsangi, Reza Ebrahimi, Sarami, Nahid
Format: Article
Language:English
Published: IOP Publishing 2015
Online Access:http://psasir.upm.edu.my/id/eprint/43057/1/Influence%20of%20CaO%20and%20SiO2%20co-doping%20on%20the%20magnetic%2C%20electrical%20properties%20and%20microstructure%20of%20a%20Ni%E2%80%93Zn%20ferrite.pdf
http://psasir.upm.edu.my/id/eprint/43057/
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spelling my.upm.eprints.430572016-05-17T09:19:20Z http://psasir.upm.edu.my/id/eprint/43057/ Influence of CaO and SiO2 co-doping on the magnetic, electrical properties and microstructure of a Ni–Zn ferrite Hajalilou, Abdollah Hashim, Mansor Kahrizsangi, Reza Ebrahimi Sarami, Nahid Effect of CaO and SiO2 additions on the grain growth and magnetic and electrical properties of a Ni-Zn ferrite was studied. The common oxides (x = 0.4CaO + 0.8SiO2) were added in different moles (x = 0, 0.02, 0.06, 0.012, 0.24 and 0.48) to Fe2O3, Zn, and NiO. The mixed powders were mechanically alloyed for 12 h using a high energy ball mill before heating at 1200 °C for 240 min. The products were characterized by x-ray diffraction (XRD), field emission scanning electron microscopy, energy-dispersive x-ray spectroscopy, vibrating sample magnetometer and static hysteresisgraph, and later by an impedance analyzer with a frequency range from 1 MHz to 1.8 GHz. The XRD results indicate a formation of single phase spinel structure in all the samples. The average grain size was affected by the additive contents so that their sizes grew, up to x = 0.06, and after that their sizes reduced from 0.631 to 0.371 μ at x = 0.48. The experimental density of the samples displayed an upward trend for x < 0.06, increasing from 5.39 g cm-3 (x = 0) to 5.51 g cm-3 (x = 0.06): afterwards, their values presented a downward trend, reducing to 4.01 g cm-3 at x = 0.48. Magnetic behaviors such as saturation magnetization (Ms) and induction magnetization (Bs) degraded as well as the real permeability of the samples by increasing the x content. The loss factor i.e. hysteresis loss also remarkably decreased by accumulation of SiO2 and CaO in the grain boundaries. The electrical resistivity was determined in the order of 6.9 × 1010 cm for x = 0 and 6.4 × 1011 cm for x = 0.48. Therefore, low relative loss factor and high resistivity make these ferrites particularly useful as inductor and transformer materials for high frequency applications. IOP Publishing 2015 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/43057/1/Influence%20of%20CaO%20and%20SiO2%20co-doping%20on%20the%20magnetic%2C%20electrical%20properties%20and%20microstructure%20of%20a%20Ni%E2%80%93Zn%20ferrite.pdf Hajalilou, Abdollah and Hashim, Mansor and Kahrizsangi, Reza Ebrahimi and Sarami, Nahid (2015) Influence of CaO and SiO2 co-doping on the magnetic, electrical properties and microstructure of a Ni–Zn ferrite. Journal of Physics D: Applied Physics, 48 (14). art. no. 145001. pp. 1-9. ISSN 0022-3727; ESSN: 1361-6463 10.1088/0022-3727/48/14/145001
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Effect of CaO and SiO2 additions on the grain growth and magnetic and electrical properties of a Ni-Zn ferrite was studied. The common oxides (x = 0.4CaO + 0.8SiO2) were added in different moles (x = 0, 0.02, 0.06, 0.012, 0.24 and 0.48) to Fe2O3, Zn, and NiO. The mixed powders were mechanically alloyed for 12 h using a high energy ball mill before heating at 1200 °C for 240 min. The products were characterized by x-ray diffraction (XRD), field emission scanning electron microscopy, energy-dispersive x-ray spectroscopy, vibrating sample magnetometer and static hysteresisgraph, and later by an impedance analyzer with a frequency range from 1 MHz to 1.8 GHz. The XRD results indicate a formation of single phase spinel structure in all the samples. The average grain size was affected by the additive contents so that their sizes grew, up to x = 0.06, and after that their sizes reduced from 0.631 to 0.371 μ at x = 0.48. The experimental density of the samples displayed an upward trend for x < 0.06, increasing from 5.39 g cm-3 (x = 0) to 5.51 g cm-3 (x = 0.06): afterwards, their values presented a downward trend, reducing to 4.01 g cm-3 at x = 0.48. Magnetic behaviors such as saturation magnetization (Ms) and induction magnetization (Bs) degraded as well as the real permeability of the samples by increasing the x content. The loss factor i.e. hysteresis loss also remarkably decreased by accumulation of SiO2 and CaO in the grain boundaries. The electrical resistivity was determined in the order of 6.9 × 1010 cm for x = 0 and 6.4 × 1011 cm for x = 0.48. Therefore, low relative loss factor and high resistivity make these ferrites particularly useful as inductor and transformer materials for high frequency applications.
format Article
author Hajalilou, Abdollah
Hashim, Mansor
Kahrizsangi, Reza Ebrahimi
Sarami, Nahid
spellingShingle Hajalilou, Abdollah
Hashim, Mansor
Kahrizsangi, Reza Ebrahimi
Sarami, Nahid
Influence of CaO and SiO2 co-doping on the magnetic, electrical properties and microstructure of a Ni–Zn ferrite
author_facet Hajalilou, Abdollah
Hashim, Mansor
Kahrizsangi, Reza Ebrahimi
Sarami, Nahid
author_sort Hajalilou, Abdollah
title Influence of CaO and SiO2 co-doping on the magnetic, electrical properties and microstructure of a Ni–Zn ferrite
title_short Influence of CaO and SiO2 co-doping on the magnetic, electrical properties and microstructure of a Ni–Zn ferrite
title_full Influence of CaO and SiO2 co-doping on the magnetic, electrical properties and microstructure of a Ni–Zn ferrite
title_fullStr Influence of CaO and SiO2 co-doping on the magnetic, electrical properties and microstructure of a Ni–Zn ferrite
title_full_unstemmed Influence of CaO and SiO2 co-doping on the magnetic, electrical properties and microstructure of a Ni–Zn ferrite
title_sort influence of cao and sio2 co-doping on the magnetic, electrical properties and microstructure of a ni–zn ferrite
publisher IOP Publishing
publishDate 2015
url http://psasir.upm.edu.my/id/eprint/43057/1/Influence%20of%20CaO%20and%20SiO2%20co-doping%20on%20the%20magnetic%2C%20electrical%20properties%20and%20microstructure%20of%20a%20Ni%E2%80%93Zn%20ferrite.pdf
http://psasir.upm.edu.my/id/eprint/43057/
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score 13.211869

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