›› 2015, Vol. 24 ›› Issue (4): 48102-048102.doi: 10.1088/1674-1056/24/4/048102

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Effect of milling atmosphere on structural and magnetic properties of Ni–Zn ferrite nanocrystalline

Abdollah Hajaliloua, Mansor Hashima, Reza Ebrahimi-Kahrizsangib, Mohamad Taghi Masoudib   

  1. a Material Synthesis and Characterization Laboratory, Institute of Advanced Technology (ITMA), Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia;
    b Advanced Materials Research Center, Materials Engineering Department, Najafabad Branch, Islamic Azad University, Najafabad, Isfahan, Iran
  • 收稿日期:2014-09-30 修回日期:2014-11-08 出版日期:2015-04-05 发布日期:2015-04-05
  • 基金资助:
    Project supported by the University Putra Malaysia Graduate Research Fellowship Section.

Effect of milling atmosphere on structural and magnetic properties of Ni–Zn ferrite nanocrystalline

Abdollah Hajaliloua, Mansor Hashima, Reza Ebrahimi-Kahrizsangib, Mohamad Taghi Masoudib   

  1. a Material Synthesis and Characterization Laboratory, Institute of Advanced Technology (ITMA), Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia;
    b Advanced Materials Research Center, Materials Engineering Department, Najafabad Branch, Islamic Azad University, Najafabad, Isfahan, Iran
  • Received:2014-09-30 Revised:2014-11-08 Online:2015-04-05 Published:2015-04-05
  • Contact: Abdollah Hajalilou E-mail:e.hajalilou@yahoo.com
  • Supported by:
    Project supported by the University Putra Malaysia Graduate Research Fellowship Section.

摘要: Powder mixtures of Zn, NiO, and Fe2O3 are mechanically alloyed by high energy ball milling to produce Ni-Zn ferrite with a nominal composition of Ni0.36Zn0.64Fe2O4. The effects of milling atmospheres (argon, air, and oxygen), milling time (from 0 to 30 h) and heat treatment are studied. The products are characterized using x-ray diffractometry, field emission scanning electron microscopy equipped with energy-dispersive x-ray spectroscopy, and transmitted electron microscopy. The results indicate that the desired ferrite is not produced during the milling in the samples milled under either air or oxygen atmospheres. In those samples milled under argon, however, Zn/NiO/Fe2O3 reacts with a solid-state diffusion mode to produce Ni-Zn ferrite nanocrystalline in a size of 8 nm after 30-h-milling. The average crystallite sizes decrease to 9 nm and 10 nm in 30-h-milling samples under air and oxygen atmospheres, respectively. Annealing the 30-h-milling samples at 600 ℃ for 2 h leads to the formation of a single phase of Ni-Zn ferrite, an increase of crystallite size, and a reduction of internal lattice strain. Finally, the effects of the milling atmosphere and heating temperature on the magnetic properties of the 30-h-milling samples are investigated.

关键词: Ni-Zn ferrite nanocrystalline, mechanical alloying, milling atmosphere, milling time, magnetic property

Abstract: Powder mixtures of Zn, NiO, and Fe2O3 are mechanically alloyed by high energy ball milling to produce Ni-Zn ferrite with a nominal composition of Ni0.36Zn0.64Fe2O4. The effects of milling atmospheres (argon, air, and oxygen), milling time (from 0 to 30 h) and heat treatment are studied. The products are characterized using x-ray diffractometry, field emission scanning electron microscopy equipped with energy-dispersive x-ray spectroscopy, and transmitted electron microscopy. The results indicate that the desired ferrite is not produced during the milling in the samples milled under either air or oxygen atmospheres. In those samples milled under argon, however, Zn/NiO/Fe2O3 reacts with a solid-state diffusion mode to produce Ni-Zn ferrite nanocrystalline in a size of 8 nm after 30-h-milling. The average crystallite sizes decrease to 9 nm and 10 nm in 30-h-milling samples under air and oxygen atmospheres, respectively. Annealing the 30-h-milling samples at 600 ℃ for 2 h leads to the formation of a single phase of Ni-Zn ferrite, an increase of crystallite size, and a reduction of internal lattice strain. Finally, the effects of the milling atmosphere and heating temperature on the magnetic properties of the 30-h-milling samples are investigated.

Key words: Ni-Zn ferrite nanocrystalline, mechanical alloying, milling atmosphere, milling time, magnetic property

中图分类号:  (Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation)

  • 81.20.Ev
81.40.Rs (Electrical and magnetic properties related to treatment conditions) 91.60.Pn (Magnetic and electrical properties) 92.70.Cp (Atmosphere)