抄録
The traditional methods to fabricate Al2O3 catalyst supports are direct sintering of the transitional Al2O3 phases (γ-, δ- and θ- Al2O3) with addition of some inhibiting agents and sol-gel processing, etc. In this work, an Al/Al(OH)3 powder mixture was used to fabricate Al2O3 support at a temperature of 600°C in vacuum by pressureless sintering. A high surface area was retained due to the transitional Al2O3 phases produced by the decomposition of Al(OH)3, which have grain sizes less than 10 nm. At the same time, the Al2O3 support has superior mechanical properties, because a metal Al network was formed after sintering. Moreover, a definite conductivity was kept for the Al2O3 support, which is of significance for electro-catalyses. The present approach provides a new way of fabricating porous Al2O3 supports in industrial applications.
