Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effects of Hydrothermal Conditions on the Morphology of Hematite Particles

Hematite 입자형상에 미치는 수열반응조건의 영향

  • 변태봉 (산업과학기술연구소 자성재료실) ;
  • 손진군 (산업과학기술연구소 자성재료실)
  • Published : 1994.02.01
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Abstract

Hematite particles were obtained by hydrothermal reaction of ferric hydroxide in the presence of small amount of citric acid which is acted as crystal growth controller. The effects of hydrothermal reaction condition son the morphology and crystal structure of powder were investigated using X-ray, TEM and FT-IR. Ellipsoidal or rectangular hematite particles were formed in the range of pH 10.75~11.75 as initial basicity of reactants and 3$\times$10-5 ~9$\times$10-5 mol as citric acid content. Crystallization of hematite was inhibited in the range of pH9. 0~10.5 and above citric acid content of $1.5\times$10-4 mol. Hematite particle length and aspect ratio were decreased gradually with increasing of citric acid content. Hematite particles formed at 14$0^{\circ}C$ exhibited particle properties with the length of 0.7 ${\mu}{\textrm}{m}$ and aspect ratio of 8. Hematite particles having a good acicular-type were not obtained above 22$0^{\circ}C$.

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References

  1. 電氣化學 v.37 Formation and Physical Properties of Iron Oxides and Hydroxides T.Takada
  2. 鐵と鋼 v.70 流動焙燒法による鐵鋼酸洗發液の新處理方法 小尾達郞;大久保武彦
  3. 鐵と鋼 v.18 監酸酸洗廢液の噴霧焙燒により副生する酸化第二鐵 伊藤俊治;遠藤一哉;牧克己;土阪彰
  4. 粉體および粉末治金 v.26 噴霧熱分解法による微粉體合成(第3報)·粒子形狀に及ぼす噴霧液滴の加熱速度および高沸点溶媒添加の效果 加藤昭夫;石松宏之;陶山容子
  5. 粉體および粉末治金 v.24 噴霧熱分解法による微粉體合成:酸化鐵粉體 加藤昭夫;德永文博
  6. 粉體および粉末治金 v.29 重金屬イオン含有排水のフェライト 化處理(第1報):Fe(OH)₂の空氣酸化による Fe₃O₄生性に關する始發 pHと溶存酸素について 近藤正樹;中島信頭;平尺輝高
  7. Corrosion Sciences v.14 The Mechanism of Formation of Iron Oxide and Oxyhydroxides in Aqueous Solution at Room Temperature T.Misawa;K.Hashimoto;S.Shimodaira
  8. 化學と工業 v.37 水溶液からつくる磁性材料 高田利夫
  9. 住友重機械技報 v.25 重金屬含有廢水のフェライト化反應の速度論的 硏究 近藤正樹;中島信頭;渡部孝史;三木康平;平尺輝高
  10. J.Colloid Interface Sci v.102 no.1 Formation of Monodispersed Spindle-Type Hematite Particles M.Ozaki;S.Kratohvil;E.Matijevic
  11. Clay and Clay Minerals v.23 The Formation of Hematite from Amorphous Iron(III) hydroxide W.R.Fischer;U.Schwertmann
  12. U.S Patent. No. 4,202,871 S.Matsumoto(et al.)
  13. National Association of Corrosion Engineers Atlas of Electrochemical Equilibria in Aqueous Solutions M.Pourbaix
  14. J.Amer.Chem.Soc. v.76 Citrate Complexes with Iron(II) and Iron(III) R.Hamm;C.Shull;D.Grant
  15. Clay Minerals v.20 The Influence of Aluminum on Iron Oxides:High-Resolution Transmission Electron Microscopic Study of Aluminous Goethites S.Mann;R.M.Cornell;U.Schwertmann
  16. Clay and Clay Minerals v.27 The Influence of Aluminum on the Formation of Iron Oxides: The Influences of [Al],[OH] and Temperature D.G.Lewis;U.Schwertmann
  17. 大阪工業技術試驗所報告 no.331 磁性酸化鐵關連化合物の濕式合成に關する硏究 信岡聰一郞
  18. 工業化學雜誌 v.68 no.12 水酸化鐵(III) 沈殿より α-Fe₂O₃,α-FeOOHの生成過程の X線 回折,赤外吸收スペクトルよる硏究 信岡聰一郞
  19. 電氣化學 v.37 酸化鐵 水酸化鐵系化合物の生成と物性 高田利夫
  20. X線 回折分析 加藤試軌
  21. Clay and Clay Minerals v.27 Influence of Organic Anions on the Crystallization of Ferri-hydrite R.M.Cornell;U.Schwertmann
  22. 色材 v.57 no.11 磁性酸化鐵の合成 松本淸治
  23. IEEE Trans.Magn v.MAG-24 no.2 γ-Fe₂O₃ of Improved Quality from Direct Synthesis of Acicular α-Fe₂O₃ V.Arndt
  24. Clay and Clay Minerals v.31 no.4 Effect of pH on the Formation of Goethite and Hematite from Ferrihydrite U.Schwertmann;E.Murad
  25. Polyhedron v.7 no.5 The Influence of Copper on the Transformation of Ferrihydrite(5Fe₂O₃·9H₂O) into Crystalline Products in Alkali Media R.Giovanoli
  26. J Chem.Tech.Biotechnol v.46 Review of the Hydrolysis of Iron(III) and the Crystallization of Amorphous Iron(III) Hydroxide Hydrate R.M.Cornell;R.Giovanoli;W.Schneider
  27. Colloid & Polymer Sci. v.258 no.10 Infrared Study of the Adsorption of Hydroxycarboxylic Acid on α-FeOOH and Amorphous Fe(III) Hydroxide R.M.Cornell;P.W.Schindler