Paper Title:
Electrophoretically Deposited Porous Ceramics and their Characterisation by X-Ray Computer Tomography
  Abstract

Planar zirconia green bodies with unidirectionally aligned pore channels were prepared by an electrophoretic deposition method using an effect which is usually disadvantageous for the EPD from aqueous suspensions: the formation of gas bubbles by electrolysis. Aqueous ZrO2 suspensions containing acetic acid to enable a sufficient gas generation were used for the EPD experiments. The influence of selected parameters – electrolyte content, applied voltage, and kind of deposition electrode – on the pore structure has been investigated. The green bodies were sintered at 1450 °C in air. Optical microscopy and X-ray computer tomography (CT) were used for characterising the porous structures. CT-investigations have the advantage of a three-dimensional characterisation of the samples by a non-destructive method. The resulting pore structure depended to a high degree on the experimental conditions of the EPD. The kind of the deposition electrode – platinum foil or platinum gauze on foil – had a strong influence on the arrangement of the pores. The EPD on Pt-foil led to randomly arranged pores, whereas very regular pore structures were obtained by the use of Pt-gauze.

  Info
Periodical
Edited by
A. R. Boccaccini, O. van der Biest, R. Clasen, T. Uchikoshi
Pages
255-260
DOI
10.4028/www.scientific.net/KEM.412.255
Citation
K. Moritz, T. Moritz, "Electrophoretically Deposited Porous Ceramics and their Characterisation by X-Ray Computer Tomography", Key Engineering Materials, Vol. 412, pp. 255-260, 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: Tassilo Moritz, Dorit Linaschke, W. Eiselt
Abstract:In the dental branch much effort is undertaken for production of metal-free ceramic restoration. Because of esthetical aspects and their...
207
Authors: Hui Qing Fan, Jin Chen, Xiu Li Chen
Abstract:Lead magnesium niobate-lead titanate (0.8Pb(Mg1/3Nb2/3)O3-0.2PbTiO3, PMN-PT) thick films in the thickness range about 75 μm have been...
24
Authors: Laxmidhar Besra, Tetsuo Uchikoshi, Tohru Suzuki, Yoshio Sakka
Abstract:Electrophoretic deposition (EPD) from aqueous suspension generally forms deposit containing incorporated bubbles because of evolution of...
39
Authors: Hynek Hadraba, Karel Maca, Zdeněk Chlup
Abstract:Electrophoretic deposition of Al2O3 and ZrO2 powders from isopropanol suspension in the presence of monochloroacetic acid under...
221
Authors: Siti Alwani A. Aziz, Muhamad Nazeri Tumiry, Hariati Taib
Chapter 7: Surface Engineering
Abstract:The electrophoretic deposition (EPD) technique was applied in order to produce titanium dioxide (TiO2) coating on stainless steel. Voltages...
569