Please use this identifier to cite or link to this item: http://cmuir.cmu.ac.th/jspui/handle/6653943832/60225
Title: Grain growth kinetics in Dy-doped Bi<inf>0.5</inf>Na<inf>0.5</inf>TiO<inf>3</inf> ceramics
Authors: A. Watcharapasorn
S. Jiansirisomboon
Keywords: Chemical Engineering
Materials Science
Issue Date: 1-May-2008
Abstract: Dysprosium-doped bismuth sodium titanate ceramics were prepared using the conventional mixed-oxide method. The amount of dysprosium used was varied from 0 to 2 at.%. The mixed powders were calcined at 800 °C and checked for phase purity using X-ray diffraction technique. The calcined powders were then cold-pressed into pellets and sintered at 1050 °C for the time ranging from 2 to 48 h. The ceramics were checked for phases and microstructures using an X-ray diffractometer and a scanning electron microscope, respectively. The analysis showed that undoped BNT ceramics sintered at longer time exhibited a significant grain growth with non-uniform grain size distribution and shape. The Dy-doped BNT however showed a much more limited grain growth behavior, resulting in smaller grain size and more equiaxed grain shape. It was also found that all Dy-doped BNT ceramics sintered at 48 h possessed lower porosity than those sintered for shorter time. © 2007 Elsevier Ltd and Techna Group S.r.l.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=42649085405&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/60225
ISSN: 02728842
Appears in Collections:CMUL: Journal Articles

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