Preparation of alumina-iron oxide compounds by coprecipitation and gel evaporation methods and their characterization

Fe2o3-al2o3 compounds were synthesized by coprecipitation (cp) and gel evaporation (ge) method with different fe/al compositions and calcined at high temperatures (300°c-1000°c). the crystalline phases in the samples were determined by xrd,the lattice parameters of the resulting crystalline phases were calculated by a least-square method. the properties were also characterized by magnetization measurements. the formation of crystalline phases (e.g.,maghemite,hematite),transformation temperature,magnetic properties of iron oxide were all affected by the component ratio and thermal treatment. © 2015,university of kuwait. all rights reserved.