Articles
  • Colloidal processing of Pb(Zr,Ti)O3, Part I-Pb dissolution 
  • Wen-Ting Hsu, Bang-Ying Yu and Wen-Cheng J. Wei*
  • Institute of Materials Science and Engineering, National Taiwan University, Taipei, Taiwan 106, R.O.C
Abstract
The dissolution behavior of aqueous Pb(ZrTi) O-3(PZT) suspensions were studied by Atomic Adsorption (AA) and Inductively Coupling Plasma (ICP) spectroscopies, specially emphasizing the change of solution acidity within pH 2 to 12, the effects of polymeric dispersant, and comparing with the dissolution behavior of PbO. The iso-electric-point (IEP) of a 2.0 wt % PZT solution was measured and compared to the minimal dissolution case (less than 10 ppm) to be in the range of pH 7 to 10. The effects of one dispersants, poly (alpha-N,N-dimethyl-N-acryloxyethyl) ammonium ethnate acrylamide (PMAA/DAAE) was investigated in comparison with a commercial anionic dispersant, an ammonium salt of polymethylacrylic acid (PMAAN). A possible dissolution model and the thickness of the Pb depletion zone on PZT particles are proposed based on the experimental observation.

Keywords: PZT; dissolution; iso-electric point; PMAA/DAAE; PMAAN; depletion zone

This Article

  • 2006; 7(3): 206-210

    Published on Sep 30, 2006