Abstract
Doctor blade (or tape casting) is one of the widely used techniques for producing thin films on large area surfaces. Tape casting is a relatively new process which was originally developed during the 1940’s as a method of forming thin sheets of piezoelectric materials and capacitors [1] and is now an accepted precision coating method. One patent, issued in 1952, focuses on the use of aqueous and non aqueous slurries applied to moving plaster batts by a doctor blading device [2]. In the doctor blading process, a well-mixed slurry consisting of a suspension of ceramic particles along with other additives (such as binders, dispersants or plasticizers) is placed on a substrate beyond the doctor blade. When a constant relative movement is established between the blade and the substrate, the slurry spreads on the substrate to form a thin sheet which results in a gel-layer upon drying. The doctor blading can operate at speed up to several meters per minute and it is suitable to coat substrate with a very wide range of wet film thicknesses ranging from 20 to several hundred microns.
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References
G. Howatt, R. Breckenridge, Fabrication of Thin Ceramic Sheets for Capacitors, J. Brownlow, J. Am. Ceram. Soc., 30, 237 (1947)
G. N. Howatt, Method of Producing High-Dielectric High-Insulation Ceramic Plates, US Patent 2582993
P. Gaskell, B. Rand, J. Summers, H. Thompson, The effect of reservoir geometry on the flow within ceramic tape casters. J. of the Europ. Ceram. Soc., 17, 1185 (1997)
R. Runk, M. Andrejco, A precision tape casting machine for fabricating thin ceramic tapes, A. Ceram. Soc. Bull., 54 (2), 199 (1975)
S. Abbott, Wet Web coatings on transparent plastic foils, Proc. of the 4th International Conference on Coating on Glass (4th ICCG), Braunschweig/Germany, C.P. Klages, H.J. Gläser, M.A. Aegerter (eds.), 395 (2002)
Y. Chou, Y. Ko, M. Yan, Fluid Flow Model for Ceramic Tape Casting, J. Am. Ceram. Soc., 70 (10), C280 (1987)
R. Pitchumani, V. Karbhari, A Generalized Fluid Flow Model for Ceramic Tape Casting, J. Am. Ceram. Soc., 78 (9), 2497 (1995)
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Berni, A., Mennig, M., Schmidt, H. (2004). Doctor Blade. In: Aegerter, M.A., Mennig, M. (eds) Sol-Gel Technologies for Glass Producers and Users. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-88953-5_10
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DOI: https://doi.org/10.1007/978-0-387-88953-5_10
Publisher Name: Springer, Boston, MA
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