Journal of Materials Science

, Volume 41, Issue 19, pp 6339–6346 | Cite as

Titanate coupling agent effects on nonaqueous Co2Z ferrite suspensions dispersion

  • Hsing-I HsiangEmail author
  • Jaw-Yue Tsai


Co2Z ferrite powders with the chemical composition 3Ba0.5Sr0.5O·2CoO·12Fe2O3 have superior high frequency magnetic properties. However, Co2Z ferrite powders are difficult to apply to practical processes because of agglomeration induced by the strong magnetic attraction between particles. In this study, Co2Z ferrite powder pretreatment using a titanate coupling agent—Neopentyl (dially)oxy tri(dioctyl)pyrophosphate titanate (Lica 38) on the sedimentation and rheological behavior is investigated. The bonding mechanisms between ferrite powder, Lica 38, and dispersant (KD1) are studied using diffuse reflectance Fourier transform infrared spectroscopy is used to explain the difference in the rheological and sedimentation behaviors of untreated and titanate coupling agent-modified ferrite powders. The affinity of Co2Z ferrite and dispersants could be substantially enhanced by coating a titanate- coupling agent onto the ferrite surface. The coated layer could prevent particles from agglomerating from magnetic interaction.


Ferrite Nickel Ferrite Ferrite Powder Sedimentation Behavior Tape Casting 



The authors would like to express their thanks to the National Science Council of the Republic of China financially supporting this project (NSC92-2216-E-006-021).


  1. 1.
    Smith J, Wijn HPJ, in “Ferrites” (Philips Technical Library, Eindhoven, Netherlands, 1959) p 278Google Scholar
  2. 2.
    Hsiang HI, Hsi CS, Lee TC, Chang CH (2004) J Magn Magn Mater 268:186CrossRefGoogle Scholar
  3. 3.
    Hsiang HI (2002) Jpn J Appl Phys 41:5137CrossRefGoogle Scholar
  4. 4.
    Hsiang HI, Duh HH (2001) J Mater Sci 36:2081CrossRefGoogle Scholar
  5. 5.
    Singh B, Verma A, Gupta M (1998) J Appl Polym Sci 70:1847CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  1. 1.Department of Resources EngineeringNational Cheng-Kung UniversityTainanTaiwan, R.O.C.

Personalised recommendations