Fabrication of Microstructures by Means of Electrophoretic Deposition (EPD)

Zeiner, Johannes; Clasen, Rolf

doi:10.4028/0-87849-998-9.57

Cited by 3 publications

(4 citation statements)

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“…6.46 or an electrically switched array of point electrodes shown in Fig. 6.47 [118][119][120][121][122][123].…”

Section: Point Electrodesmentioning

confidence: 99%

“…The disadvantage of the layer-wise structuring is the limited mechanical strength because delamination in the boundary region between the layers is a major problem. In EPD at least one side can be structured by depositing on a shaped electrode or membrane [68,78,118,138,201,202]. Applications were demonstrated for ceramic microcomponents of PZT or alumina [201,203], PZT microtubes [204], nanorods [205,206], and artifical opal growth [207].…”

Section: Deposition Of 3d Compacts Layer By Layermentioning

confidence: 99%

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Preparation of High-Purity Glasses and Advanced Ceramics Via EPD of Nanopowders

Clasen

2011

Nanostructure Science and Technology

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For the preparation of advanced materials via a powder technological route the shaping process is most important after the synthesis of the powder. Therefore high production rates and the formation of a homogeneous compact are generally desirable. Furthermore, a high green density is necessary to reduce shrinkage during drying and sintering. This is of special importance for near net shaping or microstructuring. For coatings an even thickness with a good coverage of the edges is an additional specification that has to be fulfilled. The typical shaping processes for fine or advanced ceramics with particle sizes in the µm or even sub-µm region are slip casting, forming of high-viscous masses, and dry pressing. The decreasing of particles size leads to the area of nanoparticles with sizes less than 100 nm. These nanopowders show higher sintering activity leading to a decrease of sintering temperature. Thus smaller final grain sizes can be achieved or even quantum size effects can be observed. For glasses new perspectives are opened with nanopowders. Due to the reduction of processing temperatures nanosized glass powders can be completely sintered to transparent glasses via viscous flow below the crystallization temperature. Thus no crucibles are needed any more and high-purity glasses can be prepared. For coatings on substrates with limited temperature stability glazes and enamels can be applied without additional low melting components. Theses fluxes generally reduce the chemical stability of the coating.As these nanopowders tend to aggregate due to the increased influence of van der Waals attraction forces, these nanopowders have to be dispersed perfectly. For that suspensions are most suited and the formation of aerosols (dust of nanopowders) is prevented, which might be hazardous. In electrostatically stabilized suspensions the dispersed particles show a surface charge, which can be directly used for moving this particles in an applied external electric field leading to an electrophoretic deposition (EPD) [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. But it should be kept in mind that the electrostatical as well as

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“…6.46 or an electrically switched array of point electrodes shown in Fig. 6.47 [118][119][120][121][122][123].…”

Section: Point Electrodesmentioning

confidence: 99%

Section: Deposition Of 3d Compacts Layer By Layermentioning

confidence: 99%

Preparation of High-Purity Glasses and Advanced Ceramics Via EPD of Nanopowders

Clasen

2011

Nanostructure Science and Technology

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“…42 In this work, copies of a Euro coin made from nanosized silica powder are presented. Apart from these geometrical parameters, the chemical composition of EPD during deposition can be optimized.…”

Section: Introductionmentioning

confidence: 99%

Electrophoretic deposition as rapid prototyping method

Nold

Zeiner

Assion

et al. 2010

Journal of the European Ceramic Society

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“…The EPI variant herein implemented stems from the membrane‐method approach of electrophoretic deposition (EPD). The latter was developed to process aqueous suspensions, where deposit damaging due to water electrolysis is a common problem . Indeed, organic suspensions have been preferred for the manufacture of SOFC components by EPD .…”

Section: Introductionmentioning

confidence: 99%

Electrophoretic Impregnation/Deposition Complemented with Polymeric Templating for the Fabrication of Functionalized‐Porosity Layered‐Ceramics: A Solid‐Oxide‐Fuel‐Cells Approach

2011

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A simple, economical, and environmentally compatible methodology for the fabrication of layered ceramics is presented herein. Water‐based electrophoretic techniques and polymeric templating were combined to fabricate graded‐porosity ceramic foams with controlled pore size, pore geometry, and excellent pore connectivity. Dense ceramic films can be laid either on top of the porous ceramic or in a sandwich‐style configuration. A single fabrication step suffices when working a single material (or material composition). Else, two or more fabrication steps are required. The two‐step manufacture of a half solid‐oxide‐fuel‐cell is presented. The yttria‐stabilized zirconia (8YSZ) solid electrolyte layer was deposited on top of the templated graded‐porosity nickel‐oxide/8YSZ electrode. The present methodology promises alternatives to current fabrication processes.

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Fabrication of Microstructures by Means of Electrophoretic Deposition (EPD)

Cited by 3 publications

References 0 publications

Preparation of High-Purity Glasses and Advanced Ceramics Via EPD of Nanopowders

Preparation of High-Purity Glasses and Advanced Ceramics Via EPD of Nanopowders

Electrophoretic deposition as rapid prototyping method

Electrophoretic Impregnation/Deposition Complemented with Polymeric Templating for the Fabrication of Functionalized‐Porosity Layered‐Ceramics: A Solid‐Oxide‐Fuel‐Cells Approach

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