en گروه فیزیکی و عملیات حرارتی Characterization of Physical and Thermal Properties of Materials Research Paper Research Paper <p>A series of MAl₂O₄(M=Ni, Zn, and Cu) aluminates were prepared by using impregnation method; the metal content of the products was ranged between 5wt% to 25wt%. The samples were characterized by x-ray diffraction (XRD), Brunauer Emmett Teller (BET) surface area, NH₃temperature-programmed desorption (NH₃-TPD), and inductively coupled argon plasma (ICP).</p> <p>The specific surface areas of zinc, nickel and copper aluminates were in the ranges of 47-77m²/g, 63-87m²/g and 1.6-3m²/g, respectively. The surface acidity decreased in the order of CuAl₂O₄<< NiAl₂O₄< ZnAl₂O₄<< Al₂O₃. By increasing the amount of metals in the samples, the number of acidic sites decreased, but their strength did not significantly change. Ni-aluminates have fewer acidic sites than Zn-aluminates, particularly in strong acid sites</p> Aluminate, Impregnation, Acidity, Catalyst Support 69 77 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-1204-1&slc_lang=en&sid=1 S. Komeili s_komeili@yahoo.com 180031947532846004761 180031947532846004761 Yes Chemical Engineering Department, Iran University of Science and Technology M. Takht Ravanchi ravanchi@yahoo.com 180031947532846004762 180031947532846004762 No National Petrochemical Company, Petrochemical Research and Technology Company A. Taeb taeb@iust.ac.ir 180031947532846004763 180031947532846004763 No Chemical Engineering Department, Iran University of Science and Technolog