Synthesis of chrome oxide and nickel oxide nanocomposite powder by chemical co-precipitation method
Paper ID : 1320-ICNS (R1)
Authors:
Maryam Javadi *1, Hurieh Mohammadzadeh1, Abbas Aghaeinejad2
1department of Materials Engineering, Faculty of Engineering, Urmia University, Urmia, Iran
2Department of Materials Engineering, Faculty of Engineering, Urmia University, Urmia, Iran
Abstract:
Chemical co-precipitation route was applied for the system of Ni-Cr for the final goal of nano composite powder of Ni-50%Cr oxide. Nickel sulphate and Sodium dichromate salts were used as Ni and Cr precursors respectively. Aqueous solutions of these salts were reacted under controlled pH condition adjusted by ammonia addition and then the resulting precipitates were dried and calcined at 120 ̊C and 800 ̊C respectively. AAS, XRD, TGA, FTIR and Scanning Electron Microscope were utilized for characterization of the samples. Using a basic medium with a pH of 9.50 which caused the formation of complex Ni(Cr2O4) was found to provide suitable condition for precipitation of nanosized composite powders which is discussed based on zeta potential of the system. CrO and NiO were the calcined products. The chemical homogeneity of the calcined powders was observed by elemental map scanning. The nano size and the size uniformity of products were confirmed for as-precipitated, dried and calcined powders.
Keywords:
Nanocomposites, Nanoparticles, Co-precipitation
Status : Abstract Accepted (Poster Presentation)