Влияние условий синтеза на структуру оксидов-гидроксидов алюминия, формирующихся при гидротермальной обработке нанопорошка алюминия

Abstract

Materials based on alumina have high importance for sorption, ceramics and catalysis. The control of porous structure and phase composition of alumina during synthesis is actual problem for investigators and industry. The aim of this work is to study influence of synthesis condition of the properties of alumina prepared by hydrothermal treatment from aluminum nanopowder. It was shown that highly porous aluminum-alumina composite may be prepared from aluminum nanopowder in mild conditions: temperature below 100 oC and atmospheric pressure. Control of pH of solution during hydrothermal treatment led to changing of phase composition and textural characteristics. Synthesis at pH=9 led to formation of gibbsite phase and decreased specific surface area.