Abstract
The started nanopowder is an α-alumina (α-Al2O3) marketed by Baikowski (Baikalox-BMA15, France), with 99.99% of purity and an average particle size of 150 nm. Samples were shaped by slip casting. Natural sintering was performed at different temperatures (1200, 1300, 1400, and 1500 °C) for 1 and 3 h. Furthermore, samples were sintered by “Spark Plasma Sintering (SPS)” using the dry method. The sintering temperature was between 1150 and 1350 °C with 50 °C step, with 100 °C/min as heating rate and for 3 and 10 min. We have used two pressures (25 to 50 MPa). The bulk density of the sintered samples was determined. Young’s modulus was measured by the dynamic method. The microstructure of natural sintered specimens and SPS result were observed by scanning electron microscopy. Depending on the conditions of development, different microstructures (fine and coarse) were obtained.
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