Study on reaction of spinel-solid solution with alumina

Abstract

Alumina rich spinel solid solution were synthesized from the reaction with normal spinel (Al2O3:MgO=1:1) and alumina. For starting material, single crystal and polycrystalline of normal spinel and also of alumina were prepared. Each powdered material was mixed and calcined 1450°C for 1 h, then kept at 1750°C for several hours for reaction. Samples were examined by X-ray diffraction. The lattice parameter of spinel changed to smaller value showed that the alumina rich solid solution was made by these procedure.