STRUCTURAL AND MORPHOLOGY OF NANOPOWDERS COPPER-STABILIZED ZIRCONIA

Y. Vahidshad (), H. Abdizadeh (), H. R. Baharvandi () and M. Akbari Baseri ()
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Y. Vahidshad: School of Metallurgy and Materials Engineering, University of Tehran, Tehran, P. O. Box 14395-553, Iran
H. Abdizadeh: School of Metallurgy and Materials Engineering, University of Tehran, Tehran, P. O. Box 14395-553, Iran
H. R. Baharvandi: Malek-Ashtar University of Technology, P. O. Box 14395-553, Tehran, Iran
M. Akbari Baseri: Engineering Research Institute, Tehran, Iran

Surface Review and Letters (SRL), 2009, vol. 16, issue 04, 569-577

Abstract: The structural and morphology of copper-stabilized zirconia samples prepared by sol–gel techniques in different calcination time and temperature are reported. This research work has been proposed and verified that the calcination temperature and time strongly influenced the morphology as well as interaction between the active species and the support. The results obtained from the laboratory test indicate that cubicZrO2and copper oxide are present in the structure if the calcination temperature is under 400°C. CubicZrO2, tetragonalZrO2with small amount of monoclinicZrO2, andCuOare formed after calcination at 500°C. Heating under 500°C will result in amorphous compounds being formed, suggesting that 500°C could be a phase transition point. The effect of calcination time is investigated by morphology and structural changes ofCuO–ZrO2at 600°C during 2, 3.5, 5.5, 7.5, and 10 h. Incorporation of copper inZrO2lattice results in a loss of order in theZrO2structure when it is calcined. A further increase in the temperature of calcination leads to the phase changes inZrO2structure.

Keywords: Raman; calcination; nanocomposites; stabilized-zirconia; sol–gel (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0218625X09012962

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