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

机译:水热法低温合成氧化锆掺杂氧化铝纳米粉及其表征

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摘要

Al_2O_3-ZrO_2 composite precursor powder containing 5-20 wt percent ZrO_2 was prepared by hydrothermal method at a reaction temperature of 190 deg 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 deg C and 800 deg C are alpha -Al_2O_3 and t-ZrO_2. The Frontier Transform Infrared (FTIR) studies revealed the formation of alpha -Al_2O_3 in corroboration with X-ray studies. The transmission electron microscopy (TEM) analysis of the calcined powders at 800 deg 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 10-20 nm. Energy Dispersive Spectroscopy (EDAX) confirms the presence of alumina and zirconia particles.
机译:通过水热法,在190℃的反应温度和4kgf / cm〜2的压力下,通过水热法制备了ZrO_2含量为5-20wt%的Al_2O_3-ZrO_2复合前体粉末。合成粉末的X射线衍射(XRD)证实了钙铝石和勃姆石的形成。在500摄氏度和800摄氏度煅烧的粉末中存在的相为α-Al_2O_3和t-ZrO_2。 X射线研究证实了边界变换红外(FTIR)研究的结果,表明形成了α-Al_2O_3。煅烧后的粉末在800摄氏度的透射电子显微镜(TEM)分析显示,氧化铝片的平均粒径为直径60-70nm,厚度为10-15nm,而氧化锆则为10-20nm的簇。能量色散谱(EDAX)证实了氧化铝和氧化锆颗粒的存在。

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