Paper Title:
Near Net Shaping with Bimodal Powders on Shaped Membranes via EPD
  Abstract

The electrophoretic deposition (EPD) is a very promising process for shaping compacts, especially for nanopowders. Up till now EPD is not used on a large-scale production of ceramic products. Additionally, the higher cost of nanopowders was also a barrier for the development of new products. As the deposition rate at EPD is independent of particle size, it is an ideal process for shaping compacts of powder mixtures with nanopowders. Silica and zirconia powders were used as model systems to demonstrate the advantages of EPD. Applications might be the preparation of high-purity silica glass for processing of semiconductors and zirconia ceramics for near net-shaped dental crowns. In both cases the optimum green density was achieved for approx. 10 % addition of nanopowders to a coarser matrix powder. The compacts were homogenous. Alternatively, compacts of different powders can be prepared in a two-step process. Examples are shown for the electrophoretic impregnation (EPI) and a reactive forming of nanoparticles inside the pore volume of a compact consisting of coarser particles.

  Info
Periodical
Edited by
A. R. Boccaccini, O. van der Biest, R. Clasen, T. Uchikoshi
Pages
45-50
DOI
10.4028/www.scientific.net/KEM.412.45
Citation
R. Clasen, C. Oetzel, "Near Net Shaping with Bimodal Powders on Shaped Membranes via EPD", Key Engineering Materials, Vol. 412, pp. 45-50, 2009
Online since
June 2009
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Yin Zhang, Yoshiyuki Yokogawa, Tetsuya Kameyama
Abstract:Preparation of apatite ceramics with bimodal pore structure was studied. First fine hydroxyapatite powder was obtained through...
1571
Authors: Tetsuo Uchikoshi, Seiichi Furumi, Tohru Suzuki, Yoshio Sakka
Abstract:Cathodic electrophoretic deposition of bimodal alumina suspension was performed using conductive polypyrrole (Ppy) film as an electrode. The...
227
Authors: Li Da Shen, Zong Jun Tian, Y.H. Huang, Guo Ran Hua
Abstract:Reconstituted nanostructured partially stabilized zirconia (PSZ) feedstock powders were laser sintered under a range of laser processing...
855
Authors: Fei Chen, Qiang Shen, Lian Meng Zhang
Chapter 2: Engineering Ceramics and Ceramic Composites
Abstract:In this paper, silicon nitride porous ceramics with high porosity and bimodal pore structure were prepared using pressureless sintering at...
873
Authors: Fei Chen, Qiang Shen, Lian Meng Zhang
I. Infrastructural and Bio-Materials
Abstract:In this Paper, Silicon Nitride Porous Ceramics with Hierarchical Porosity Were Prepared Using Pressureless Sintering and their Mechanical...
69