This work presents a fast and direct controlled routine for the fabrication of fully dense alumina based on reactive spark plasma sintering (reactive-SPS) boehmite (γ-AlOOH) nano-powders obtained by sol–gel technique. The evolution transition aluminas during has been studied. Some powders were seeded with α-Al2O3 particles prior to gelation. Boehmite exhibited at 1070 °C, enhancing transformati...

• How different chemical fractionation affect Sardinian Mediterranean-type bauxites. Al2O3 vs SiO2 suggest variability in the epigenetic kaolinite by boehmite replacement. Cerianite micro-spheres and REE-phases are generated oxidising illuvial horizon. R-mode analysis suggests most critical raw materials covary with contents. bauxites could represent a potential source of materials. bauxite dep...

Abstract In the present study, high surface area boehmite nanopowder was recovered from aluminum cans waste. The sodium aluminate solution first prepared by dissolving in NaOH and then, H 2 O added to precipitate boehmite. characterized means of X-ray diffraction (XRD), transmission electron microscopy (TEM) N adsorption–desorption techniques. thermal stability sample investigated using thermog...

Graphene-encapsulated nickel nanoclusters are a feasible strategy to inhibit the deactivation of nickel-based catalysts. In this work, graphene-encapsulated catalysts (Ni@C/HZSM-5) were prepared by compression forming process, using pseudo-boehmite, Al2O3, and ZrO2 as binders. The pseudo-boehmite was gradually transformed from amorphous crystalline alumina at high temperatures, which destroyed ...