شماره ركورد كنفرانس :
4518
عنوان مقاله :
Effect of time and heat-treatment temperatures on the characterization of nano-crystallite Mn1.5Co1.5O4 prepared by citrate sol–gel method
Author/Authors :
S. Tahereh Hashemi Material Science & Engineering Department -Sharif University of Technology, Tehran , Niloofar Soltani Material Science & Engineering Department -Sharif University of Technology, Tehran , Amirmasoud Dayaghi Material Science & Engineering Department -Sharif University of Technology, Tehran , Masoud Askari Material Science & Engineering Department -Sharif University of Technology, Tehran
كليدواژه :
Sol-gel , Mn1.5Co1.5O4 , fuel cells , nano
عنوان كنفرانس :
The 7th International Chemical Engineering Congress & Exhibition (IChEC 2011
چكيده لاتين :
Mn1.5Co1.5O4 based spinels are of great interest as raw materials in coating of interconnects in solid oxide fuel cells. Nano-crystalline Mn1.5Co1.5O4 spinels have been synthesized from aqueous solution of metal nitrate containing citric acid as a chelating agent using sol-gel method. The effect of annealing time and temperature were also evaluated at various annealing times (2h, 4h) and annealing temperatures (800, 950, 1050 oC) through X-Ray Diffraction (XRD) analysis to optimize the amount of nano-crystalline Mn1.5Co1.5O4. Results showed that the calcination temperature and time are playing significant roles in the formation of the single-phase and at the same time on the size of nano-crystalline Mn1.5Co1.5O4. More Mn1.5Co1.5O4 was obtained at higher temperatures and longer times as lower temperatures and shorter times were resulted in Mn1.5Co1.5O4 with smaller crystallite size .The optimum time and temperature were selected to synthesize Mn1.5Co1.5O4 with smallest size. The thermal behavior of the material has been examined by Thermogravimetry (TG) and Differential Thermal Analysis (DTA).
