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Adsorption property of citrate dispersant on BaTiO3 particles in aqueous solution

  • Su Tao-long  (苏滑珑)Email author
  • Zhuang Zhi-qiang  (庄志强)
Article

Abstract

Dispersion behavior of ultra fine BaTiO3 particles in the aqueous solution of ammonium citrate (NH4-CA) or citric acid lanthanum chelate (NH4-La-CA) was investigated. The dispersion property was characterized with sedimentation value. It is easier to obtain well dispersed slurry with NH4La-CA than NH4-CA. In an attempt to better understand the role of citric acid radical, simulation of the dispersant adsorption on BaTiO3 particle was performed with universal force field (UFF). It is demonstrated that the interaction between citric acid radical and BaTiO3 particle surface is a weak chemical adsorption. Trivalent citric acid radical is adsorbed on BaTiO3 particle surface with maximal adsorption energy. And, larger molecules of NH4-La-CA formed by adding La3+ lead to better dispersion property than NH4-CA.

Key words

citrate dispersant BaTiO3 adsorption 

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References

  1. [1]
    BLANCO-LOPEZ M C, RAND B, RILEY F L. The properties of aqueous phase suspensions of barium titanate[J]. J Eur Ceram Soc, 1997, 17: 281–287.CrossRefGoogle Scholar
  2. [2]
    WANG X Y, LU S W, LEE B I. Dispersion and aging behavior of BaTiO3 and PZT in water[J]. Materials Research Bulletin, 2000, 35: 2555–2563.CrossRefGoogle Scholar
  3. [3]
    HIDBER P C, GRAULE T J, GAUCKLER L J. Citric acid-A dispersant for aqueous alumina suspensions[J]. J Am Ceram Soc, 1996, 79(7): 1857–1867.CrossRefGoogle Scholar
  4. [4]
    BIGGS S, SCALES P J, LEONG Y K, et al. Effects of citrate adsorption on the interactions between zirconia surfaces[J]. J Chem Soc Faraday Trans, 1995, 91(17): 2921–2928.CrossRefGoogle Scholar
  5. [5]
    GOTOR F J, REAL C, DIANEZ M J, et al. Relationships between the tecture and structure of BaTiO3 and its tetragonal-cubic transition enthalpie[J]. Journal of Solid State Chemistry, 1996, 123: 301–305.CrossRefGoogle Scholar
  6. [6]
    RAPPÉ A K, CASEWIT C J, COLWELL K S, et al. UFF, a full periodic table force field for molecular mechanics and molecular dynamics simulations[J]. J Am Chem Soc, 1992, 114: 1002410029.Google Scholar
  7. [7]
    CARLOS G Y, HEBERTO B R, FROYLAÂN M. Colloidal processing of BaTiO3 using ammonium polyacrylate as dispersant[J]. Ceramics International, 2000, 26: 609–616.CrossRefGoogle Scholar
  8. [8]
    ZHEN S L. Surface Modification of Power [M]. Beijing: China Building Materials Press, 2003. (in Chinese)Google Scholar
  9. [9]
    ZHAO Z G. Colloid and Surface Chemistry[M]. Beijing: Chemical Industry Press, 2003: 9. (in Chinese)Google Scholar
  10. [10]
    ZHANG D L, GONG S P, ZHOU D X. Speciation in electroless nickel solutions for BaTiO3-based PTCR ceramics and the roles of complexing agents[J]. Electronic Component and Materials, 2000, 19(1): 17–19. (in Chinese)Google Scholar
  11. [11]
    LANGE F F. Powder processing science and technology for increased reliability[J]. J Am Ceram Soc, 1989, 72: 3–15.CrossRefGoogle Scholar
  12. [12]
    VANHOYLAND G, PAGNAER J, D’HAEN J, et al. Characterization and structural study of lanthanum citrate trihydrate [La(C6H5O7)(H2O)2]·H2O[J]. Journal of Solid State Chemistry, 2005, 178: 166–171.CrossRefGoogle Scholar

Copyright information

© Published by: Central South University Press, Sole distributor outside Mainland China: Springer 2007

Authors and Affiliations

  • Su Tao-long  (苏滑珑)
    • 1
    Email author
  • Zhuang Zhi-qiang  (庄志强)
    • 1
  1. 1.School of Materials Science and EngineeringSouth China University of TechnologyGuangzhouChina

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