Article

Journal of Engineering Research

, 3:10

First online:

Open Access This content is freely available online to anyone, anywhere at any time.

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

  • Fahmida GulshanAffiliated withMaterials and Metallurgical Engineering Department, Bangladesh University of Engineering and Technology Email author 
  • , Kiyoshi OkadaAffiliated withMaterials and Structures Laboratory AMDII division, Tokyo Institute of Technology

Abstract

Fe2O3-Al2O3 compounds were synthesized by coprecipitation (CP) and gel evaporation (GE) method with different Fe/Al compositions and calcined at high temperatures (300ºC-1000ºC). 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.

Keywords:

Coprecipitation Fe2O3-Al2O3 compounds gel evaporation hematite maghemite