The Characterization and Sintering Behavior of Alumina Powder Prepared by Heat-treatment of Artificial Marble Waste Containing $Al(OH)_3$ Powder

Alumina powder was prepared from heat-treatment of artificial marble waste fine aggregate containing for the purpose of the feasibility of its recycling. Artificial marble waste was heat-treated between and and XRD, BET surface area, BJH pore size distribution and adsorption of As were analyzed for heat-treated powder. It was found that the adsorption efficiency of As was significantly affected by phase composition of alumina powder rather than its physical characteristic. Heat-treated powder compact was sintered to produce the pellet. Alumina pellet with porosity more than 60% could be obtained after sintering below and also the addition of glass powder as a sintering aid had a positive effect on lowering sintering temperature, led to the high porosity near 60% and adsorption of As over 60% even at .