E Navaei Alvar - Department of Mining & Metallurgy Engineering, Amirkabir University of Technology, Tehran, Iran
M Rezaei - Department of Chemical Engineering, Faculty of Engineering, University of Kashan, Kashan, Iran
H Navaei Alvar - Sarv Oil & Gas Industries Development Co., Tehran, Iran.
H. Feyzallahzadeh - Sarv Oil & Gas Industries Development Co., Tehran, Iran.

In this paper nanocrystalline MgAl2O4 spinel powders were synthesized with a new synthesis method by co-precipitation method with CTAB as surfactant. The prepared samples were characterized by X-ray diffraction (XRD), N2 adsorption (BET), thermal gravimetric and differential thermal analysis (TGA/DTA), Fourier-Transform Infrared Spectroscopy (FT-IR). The effects of surfactant to metal molar ratio on the structural properties of the samples were investigated. The obtained results showed that the addition of surfactant have a significant effect on the specific surface area and thermal stability of the samples.

MgAl2O4; Nanocrystalline powder; Precipitation; Surfactant