Abstract
Porous alumina ceramics (density 0.75 TD) with a typical vermicular microstructure were obtained from transitional nano-alumina powder by cold isostatic pressing (P = 500 MPa) and sintering at non-isothermal conditions from RT to 1,500°C. Mechanical activation, realized by attriting, was used to reduce the α-Al2O3 transformation to a temperature of 1,038°C. Conventional pressing (P = 500 MPa) and sintering at 1,500°C were used to fabricate 0.96 TD dense alumina ceramics. Electrophoretic deposition was applied to the mechanically activated powder followed by isostatic pressing and sintering. Compacts with a density of 0.94 TD were obtained at 1,400°C/30 min. The microstructure was homogenous with grain sizes of 300 ± 100 nm.
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Fidancevska, E., Bossert, J., Vassilev, V., Milosevski, M. (2011). Fabrication of Porous and Dense Ceramics from Transitional Nano-Alumina. In: Reithmaier, J., Paunovic, P., Kulisch, W., Popov, C., Petkov, P. (eds) Nanotechnological Basis for Advanced Sensors. NATO Science for Peace and Security Series B: Physics and Biophysics. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0903-4_4
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DOI: https://doi.org/10.1007/978-94-007-0903-4_4
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