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Nanocrystalline yttria stabilized zirconia by metal-PVA complexation

DSpace at IIT Bombay

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Title Nanocrystalline yttria stabilized zirconia by metal-PVA complexation
 
Creator OJHA, PK
RATH, SK
CHONGDAR, TK
KULKARNI, AR
 
Subject thin-films
electrical-properties
nonisothermal synthesis
spray-pyrolysis
phase-stability
powders
nanopowder
route
ysz
precursor
precursors: organic
nanocrystalline
ysz
 
Description Nanocrystalline 8 mol% yttria stabilized zirconia (YSZ) powder was synthesized using polyvinyl alcohol (PVA) as organic precursor and acidic solutions of yttrium oxynitrite and zirconium nitrate. Complex formation was established using Fourier transform infrared (FTIR) spectroscopy and solid state (13)C nuclear magnetic resonance (NMR) spectroscopy. Thermal stability of the complex was investigated by thermogravimetric analysis (TGA). X-ray diffractometry (XRD) revealed formation of cubic phase YSZ at a temperature as low as 600 degrees C. The lattice parameter and average crystallite size were calculated from the XRD data. Particle size of the YSZ powder was investigated through transmission electron microscopy (TEM). The band gap of the sintered YSZ pellet was measured by UV-Vis-diffused reflectance spectroscopy (DRS). AC electrical conductivity was measured in air at 1 kHz frequency using a programmable RCL meter. The activation energy was calculated from the conductivity data at different temperatures using the standard Arrhenius equation. (C) 2009 Elsevier Ltd and Techna Group S.r.l. .
 
Publisher ELSEVIER SCI LTD
 
Date 2011-07-22T08:33:14Z
2011-12-26T12:52:21Z
2011-12-27T05:35:41Z
2011-07-22T08:33:14Z
2011-12-26T12:52:21Z
2011-12-27T05:35:41Z
2010
 
Type Article
 
Identifier CERAMICS INTERNATIONAL, 36(2), 561-566
0272-8842
http://dx.doi.org/10.1016/j.ceramint.2009.09.035
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6166
http://hdl.handle.net/10054/6166
 
Language en