Low temperature synthesis and characterization of zirconia doped alumina nanopowder by hydrothermal process

被引：10
|
作者：
Chandradass, J. [1 ]
Yoon, Jae Hong [1 ]
Bae, Dong-Sik [1 ]
机构：
[1] Changwon Natl Univ, Sch Nano & Adv Mat Engnn, Gyeongnam 641773, South Korea
来源：
MATERIALS AND MANUFACTURING PROCESSES | 2008年 / 23卷 / 02期
关键词：
alumina-zirconia; crystallization; differential thermal analysis; hydrothermal; nanopowder; scanning electron microscope; spectroscopy; thermogravimetric analysis; transmission electron microscope and Fourier infra red; X-ray diffraction;
D O I：
10.1080/10426910701774544
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Al2O3-ZrO2 composite precursor powder containing 5-20wt% ZrO2 was prepared by hydrothermal method at a reaction temperature of 190 degrees C and pressure 4kgf/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 degrees C and 800 degrees C are alpha-Al2O3 and t-ZrO2. The Frontier Transform Infrared (FTIR) studies revealed the formation of alpha-Al2O3 in corroboration with X-ray studies. The transmission electron microscopy (TEM) analysis of the calcined powders at 800 degrees C revealed the average particle size of alumina platelets is 60-70nm in diameter and 10-15nm in thickness whereas zirconia is observed as clusters of size 10-20nm. Energy Dispersive Spectroscopy (EDAX) confirms the presence of alumina and zirconia particles.
引用
收藏
页码：139 / 143
页数：5
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