ALUMINA MATERIAL HAVING A MULTISCALE STRUCTURE, INCLUDING AN ALUMINUM-OXIDE BINDER HAVING GOOD MECHANICAL STRENGTH, AND METHOD FOR PREPARING SAME

摘要

The invention relates to a material in the form of a millimeter-scale object consisting of: large alumina particles having a median diameter of between 10 and 200 pm, said large particles being separated, from one interface to the other, by at least 10 pm; small alumina particles having a median diameter of between 0.5 and 10 pm, said small particles being separated, from one interface to the other, by at least 5 pm and located in the space between the large particles; and a binder consisting of aluminum oxide, said binder being located in the space between said small and large particles, said material having a mesoporous volume, measured by mercury porosimetry, of between 0.2 and 2 mL/g, a macroporous volume, measured by mercury porosimetry, of between 0.05 and 0.2 mL/g, and a BET specific surface area of between 90 and 350 m2/g.