Abstract
The suspensions of nanometer (NT) and micrometer (MT) sized titania powders were prepared in isopropanol. Triethanolamine (TEA) and acetic acid (AA) were used to enhance the surface charge of particles. The characteristics of wet NT and MT deposits such as thickness, packing fraction and electrical resistivity were determined at 60 and 200 V during electrophoretic deposition (EPD). The packing fraction of MT (≈ 0.15–0.3) deposits was higher than NT (≈0.05–0.1) ones leading to their less shrinkage and so less cracking during drying. Despite the lower concentration of H+TEA ions in MT deposit, their resistivity was smaller than NT deposits at 60 V due to the higher mobility of H+TEA ions in them. The mobility of H+TEA ions in both NT and MT deposits formed at 200 V was low but the resistivity of NT deposits was smaller due to the higher concentrations of H+TEA ions in them.
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Farrokhi-Rad, M. Effect of particles size on the characteristics of wet deposits during electrophoretic deposition. J Electroceram 40, 211–218 (2018). https://doi.org/10.1007/s10832-018-0122-5
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DOI: https://doi.org/10.1007/s10832-018-0122-5