Journal of Materials Science

, Volume 43, Issue 14, pp 4737–4741 | Cite as

Morphology control of goethite acicular particles during aging by nitrogen bubbling and subsequent reactive aeration

  • Haruki Kurokawa
  • Mamoru SennaEmail author
Reactivity of SOlids


Conditions for synthesizing acicular fine particles of goethite with high aspect ratio were devised by oxidizing mixed slurry comprising ferrous carbonate and hydroxide after neutralizing by alkali carbonate. By bubbling N2 after neutralization into the slurry containing FeCO3 and Fe(OH)2, dissolved CO2 is ejected. As a consequence, the relative concentration of CO 3 2− decreases and that of hydroxide increases. These favor the increase of the aspect ratio of the goethite particles via two factors, i.e., (1) decrease in the critical size of the nuclei and (2) suppression of growth inhibition at the tip of needle-like particles due to CO 3 2− adsorption. We propose a reaction scheme for the entire processing.


Goethite Maghemite Ferrous Hydroxide FeCO3 Twin Formation 


  1. 1.
    Iwasaki M, Hara M, Ito S (2000) J Mater Sci 35:943. doi: CrossRefGoogle Scholar
  2. 2.
    Domingo C, Clemente RR, Blesa MA (1993) Solid State Ionics 59:187CrossRefGoogle Scholar
  3. 3.
    Kosmulski M, Maczka E, Jartych E, Rosenholmb JB (2003) Adv Colloid Interface Sci 103:57CrossRefGoogle Scholar
  4. 4.
    Sudakar C, Subbanna GN, Kutty TRN (2002) J Mater Chem 12:107CrossRefGoogle Scholar
  5. 5.
    Sudakar C, Subbanna GN, Kutty TRN (2004) J Mater Sci 39:4271. doi: CrossRefGoogle Scholar
  6. 6.
    Subbanna GN, Sudakar C, Kutty TRN (2003) Mater Chem Phys 78:43CrossRefGoogle Scholar
  7. 7.
    Cudennec Y, Lecerf A (2005) Solid State Sci 27:520CrossRefGoogle Scholar
  8. 8.
    Varanda LC, Goya GF, Morales MP, Marques RFC, Godoi RHM, Jafelicci M, Serna CJ (2002) IEEE Trans Mag 38:1907CrossRefGoogle Scholar
  9. 9.
    Löffler L, Mader W (2006) J Eur Ceram Soc 26:131CrossRefGoogle Scholar
  10. 10.
    Debakker PMA, Degrave E, Van den Berghe RE, Bowen LH, Pollard RJ, Persoons RM (1991) Phys Chem Miner 18:131CrossRefGoogle Scholar
  11. 11.
    SilesDotor MG, Bokhimi X, Morales A, Benaissa M, Cabral Prieto A (1997) Nanostructured Mater 8:657CrossRefGoogle Scholar
  12. 12.
    Kurokawa H, Senna M (1999) Powder Technol 103:71CrossRefGoogle Scholar
  13. 13.
    Kurokawa H, Senna M (2006) Mater Sci Eng B 135:55CrossRefGoogle Scholar
  14. 14.
    Kurokawa H, Urai T (1996) J Jpn Soc Powder Powder Metall 43:52CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.MS Company, Toda Kogyo Co.OtakeJapan
  2. 2.Faculty of Science and TechnologyKeio UniversityYokohamaJapan

Personalised recommendations