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Crystallization of the NiZn ferrite nanofibers fabricated by electrospinning method

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2020, 30(6), pp.226-231
  • DOI : 10.6111/JKCGCT.2020.30.6.226
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : October 15, 2020
  • Accepted : November 15, 2020
  • Published : December 31, 2020

Kyeong-Han Na 1,  Sun-Ho Yoo 2,  Tae-Hyeob Song 3,  Kim Sung Wook 3,  Won-Youl Choi 4

1강릉원주대학교 신소재금속공학과
2국립강릉원주대학교
3한국건설기술연구원
4강릉원주대학교

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ABSTRACT

Polyvinyl pyrrolidone nanofibers including nickel, zinc, and iron precursors were fabricated via the electrospinning method. To convert as-spun nanofibers to Ni0.5Zn0.5Fe2O4 oxide nanofibers which is c apable o f shielding a n electromagnetic wave, heat treatment conditions were optimized. To obtain the heat treatment condition that can exclude amorphous carbon black and secondary crystal phase, samples were taken at each temperature while the calcination process and analyzed. According to the X-ray diffraction (XRD) analysis, the Ni0.5Zn0.5Fe2O4 crystal phase started to appear from 300°C, but itwas confirmed through energy dispersive spectroscopy (EDS) analysis that heat treatment of 500°C or more was required to remove most of the carbon black. When the calcination temperature exceeds 650°C, crystal nuclei starts to grow and the fiber surface condition becomes rough, so it was confirmed that the heat treatment conditions should be selectively determined according to the application field.

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