Synthesis and characterization of hexagonal shaped nanocrystalline zinc oxide powders

Ahmad, M.a, Ahmed, E.a, Khalid, N.R.a , Jackson, M.J.b and Ahmed, W.c (2012) Synthesis and characterization of hexagonal shaped nanocrystalline zinc oxide powders. International Journal of Manufacturing, Materials, and Mechanical Engineering, 2 (2). pp. 61-76. ISSN 21561680

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Nanocrystalline ZnO powders are synthesized using a quick, simple and inexpensive combustion method. Glycine and zinc nitrate, used as fuel and oxidant/cation sources respectively, were mixed together at room temperature to form a slurry or gel. A series of experiments were performed to synthesize nanoparticles for different fuel to oxidant ratios. The rate of heating and stirring greatly influenced the combustion process. The as-synthesized powder was heat treated at elevated temperatures for varying time to remove adsorbed impurities from the surface of the ZnO nanoparticles. Both the as-synthesized and heat treated powders were characterized using a variety of analytical techniques. The hexagonal wurtzite phase of the ZnO powder was revealed from x-ray diffraction measurements. A decrease in the x-ray diffraction density (Dx) and the bulk density (D) resulted in an increase in percentage porosity (P) of as-synthesized and heat treated ZnO powders. The range of fuel to oxidant ratios used in the present work indicates that they had a strong influence on the grain size of ZnO powders. The average grain size estimated by using the Scherer formula indicated an approximate value of 6-21 nm for the as-synthesized and heat treated samples. Copyright © 2012, IGI Global.

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Keywords:synthesis, ZnO powders
Subjects:F Physical Sciences > F200 Materials Science
J Technologies > J510 Materials Technology
Divisions:College of Science > School of Mathematics and Physics
ID Code:27168
Deposited On:01 Aug 2018 08:47

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