Highly porous and abundantly crystallized alumina (Al2O3) powders, can be prepared using an asymmetric polystyrene-b-poly(ethylene oxide) (PS-b-PEO) diblock copolymer, which critically allowed solid-phase transition from γ- to α-Al2O3 in nanometer-scale as its high-temperature phase by suitable thermal treatment with a retention of PS-b-PEO templated porous structures.
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