en گروه سرامیک Ceramic Materials and Engineering Research Paper Research Paper <p>The synthesis of micro-sized, uniformly distributed Al₂O₃-15Vol% Ni powders were studied through three step co-precipitation of hydroxides mixtures from proper solution, calcination at air atmosphere and final step of calcined powders in a carbon bed. Al and Ni hydroxide and amorphous phase were first obtained from their salt&rsquo;s solutions through chemical co-precipitation method by adjusting pH. The precipitated powders were then calcined to obtain a mixture of their oxides as NiO and NiAl₂O₄ which were reduced in a carbon bed at various temperatures up to 1300. Proper temperature for calcination in air was determined through TG analysis; 900. SEM observation of powders after reduction, revealed micro-sized Ni particles, along with fin distribution of Ni and Al₂O₃ elements. XRD analysis of the calcined sample showed the presence of NiAl₂O₄and NiO and the same analysis for the reduced sample confirmed the formation of Al₂O₃ and Ni.&nbsp;&nbsp;&nbsp;&nbsp;</p> composite, Al2O3-Ni, carbon bed, carbon bed, co-precipitation, NiAl2O4 31 37 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-75-5&slc_lang=en&sid=1 N. Maskani neda.maskani@gmail.com 180031947532846004750 180031947532846004750 No Iran University of Science and technology R. Naghizadeh rnaghizadeh@iust.ac.ir 180031947532846004751 180031947532846004751 Yes Iran University of Science and technology A. Mirhabibi ar_mirhabibi@iust.ac.ir 180031947532846004752 180031947532846004752 No Iran University of Science and technology H. Rezaie hrezaie@iust.ac.ir 180031947532846004753 180031947532846004753 No Iran University of Science and technology