Low Temperature Synthesis and Characterization of Zirconia Doped Alumina Nanopowder by Hydrothermal Process

Al 2 O 3 -ZrO 2 composite precursor powder containing 5-20 wt% ZrO 2 was prepared by hydrothermal method at a reaction temperature of 190°C and pressure 4 kgf/cm 2 . X-ray diffraction (XRD) of as-synthesized powder confirms the formation of bayerite and boehmite. The phases present in the powders ca...

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Bibliographic Details
Published in:Materials and manufacturing processes 2008-01, Vol.23 (2), p.138-142
Main Authors: Chandradass, J., Yoon, Jae Hong, Bae, Dong-sik
Format: Article
Language:English
Subjects:
Alumina-zirconia
Crystallization
Differential thermal analysis
Hydrothermal
Nanopowder
Scanning electron microscope
Spectroscopy
Thermogravimetric analysis
Transmission electron microscope and Fourier infra red
X-ray diffraction
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Summary:Al 2 O 3 -ZrO 2 composite precursor powder containing 5-20 wt% ZrO 2 was prepared by hydrothermal method at a reaction temperature of 190°C and pressure 4 kgf/cm 2 . X-ray diffraction (XRD) of as-synthesized powder confirms the formation of bayerite and boehmite. The phases present in the powders calcined at 500°C and 800°C are α-Al 2 O 3 and t-ZrO 2 . The Frontier Transform Infrared (FTIR) studies revealed the formation of α-Al 2 O 3 in corroboration with X-ray studies. The transmission electron microscopy (TEM) analysis of the calcined powders at 800°C revealed the average particle size of alumina platelets is 60-70 nm in diameter and 10-15 nm in thickness whereas zirconia is observed as clusters of size 10-20 nm. Energy Dispersive Spectroscopy (EDAX) confirms the presence of alumina and zirconia particles.
ISSN:1042-6914
1532-2475
DOI:10.1080/10426910701774544