Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Synthesis of Barium Ferrite Powder by the Coprecipitation Method using Iron Pickling Waste Acid

  • Youngjae Shim (Division of Materials Science Engineering and Research Institute of Industrial Technology, Gyeongsang National University) ;
  • Kim, Dong-Whan (Division of Materials Science Engineering and Research Institute of Industrial Technology, Gyeongsang National University) ;
  • Kim, Guk-Tae (Division of Materials Science Engineering and Research Institute of Industrial Technology, Gyeongsang National University)
  • Published : 2001.05.01
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Abstract

Barium ferrite powders were synthesized by the coprecipitation method using iron-pickling waste acid (IPWA) and BaCl$_2$$.$2H$_2$O as raw materials. Fe$\^$2+/ ions in the IPWA, which contains both Fe$\^$2+/ and Fe$\^$3+/ ions, were oxidized into Fe$\^$3+/ ions using H$_2$O$_2$. Proper amount of BaCl$_2$$.$2H$_2$O was dissolved into the oxidized IPWA. Using NaOH, Ba$\^$2+/ and Fe$\^$3+/ ions were coprecipitated as Ba(OH)$_2$and Fe(OH)$_3$. The coprecipitated Ba(OH)$_2$and Fe(OH)$_3$were washed and dried. Barium ferrite powders were obtained by calcining the dried Ba(OH)$_2$and Fe(OH)$_3$mixture from 400$\^{C}$ to 1000$\^{C}$ with a 100$\^{C}$ interval. Barium ferrite powders were characterized by X-ray diffraction, SEM, and VSM. It was found that barium ferrite powders could be synthesized at around 630$\^{C}$. The synthesized barium ferrite powders showed hexagonal plate shapes with a fairly uniform size. The barium ferrite powder calcined at 900$\^{C}$ showed good magnetic properties, saturation magnetization of 67emu/g and maximum coercivity of 5000 Oe.

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References

  1. VCH Verlagsgessellschaft The Iron Oxides Structure, Properties, Reactions, Occurrence and Uses R.M. Cornell;U. Schwertmann
  2. J. Am. Cer. Soc. v.63 no.11-12 Formation of Chemically Coprecipitated Barium Ferrite W. Roos
  3. J. Kor. Cer. Soc. v.28 no.12 Preparation of Maghemite Using Waste Pickling Acid T.B. Byeon;J.Y. Lee;D.Y. Kim;J.G. Shon;S.J. Kwon
  4. J. Kor. Inst. Met. & Mater. v.30 no.8 Effect of pH on the Fromation of Iron Oxyhydroxide T.B. Byeon;J. Y. Lee;D.Y. Kim;J.G. Shon;S.J. Kwon
  5. Z. Angew. Phys v.15 no.3 Coercive Force of Barium Ferrite Powder G. Heimake
  6. J. Am. Cer. Soc. v.17 no.3 Saturation Magnetization of Barium Ferrite Powder After Various Milling and Annealing Treatments G.Heimake
  7. Phase Diagrams for Ceramics. Vol.1 E.M. Levin;C.R. Robbins;H.F. McMurdie
  8. J. Magn. Magn. Mater v.168 Key Step in Synthesis of Ultrafine $BaFe_12O_19$ by Sol-gel Technique W. Zhong;W. Ding;N. Zhang;J. Hong;Q. Yan;Y. Du
  9. Materials Letters The Preparation of Barium Ferrite Nanocrystalline Powders by a Stearic Acid Gel method X. Wang;D. Li;L. Lu;X. Wang;L. Zhang;Y. Liu
  10. J. Am. Cer. Soc. v.57 no.8 Preparation of High-Coercivity $BaFe_12O_19$ K. Haneda;C. Miyakawa;H. Kojima
  11. Ph Los. Trans. R. Soc. London. Ser. A. v.240 no.826 Mechanism of Magnetic Hysteresis in Heterogeneous Alloys E.C. Stoner;E.P. Wohlfarth
  12. J. Appl. Phys. v.44 no.8 Magnetization Reversal Process in Chemically Precipitated and Ordinary Prepared $BaFe_12O_19$ K. Haneda;H. Kojima
  13. J. Appl. Phys. v.40 no.3 Temperature Dependence of Ms, and k1 of $BaFe_12O_19$ and $SrFe_12O_19$ Single Crystals B.T. Shirk;W.R. Buessem