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  • American Ceramics Society  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Preparation of Anode/Electrolyte Ceramic Composites by Coextrusion of Pastes (2004)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 87 (2004), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Anode/electrolyte two-layer ceramic composites for tubular solid oxide fuel cells were prepared through coextrusion of multiple pastes containing a water-based binder (an aqueous solution of hydroxypropyl methylcellulose). The multibillet extrusion (MBE) technique was found to be effective in achieving the anode/electrolyte composite pipes. Furthermore, it is possible to reduce the wall thickness of both anode and electrolyte layers by raising the extrusion ratio of each layer. The extrusion pressure and binder content required to obtain sound extrudates decreased with an increase in the fraction of nickel oxide in an anode layer. It is feasible to decrease the difference in the sintering shrinkage between the anode and electrolyte layers by incorporating calcined coarse yttria-stabilized zirconia (YSZ) powder in the electrolyte layer. The incorporation of coarse YSZ powder in an anode is effective in forming a continuous NiO network within the YSZ matrix.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1551-2916.2004.00983.x
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  • 2
    Electronic Resource
    Electronic Resource
    Extrusion of Metal–Ceramic Composite Pipes (2000)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 83 (2000), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Metal–ceramic composite pipes were prepared through simultaneous extrusion of different pastes by a multi-billet extrusion method. ZrO2 and stainless steel powders were chosen, and an aqueous solution of water-soluble polymer, hydroxypropyl methylcellulose (HPMC), was used as binder. The maximum extrusion pressure and the minimum amount of binder required reached their lowest values when the mixing fraction of ZrO2 powder was 0.4. The minimum amount of binder for forming the outer layers was 4%–5% higher than that for inner layers, even for the same powder. It was possible to decrease the binder content and broaden the extrudable range of the binder content by means of mixing coarse and fine powders.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2000.tb01334.x
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