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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/6166

Title: Nanocrystalline yttria stabilized zirconia by metal-PVA complexation
Authors: OJHA, PK
RATH, SK
CHONGDAR, TK
KULKARNI, AR
Keywords: thin-films
electrical-properties
nonisothermal synthesis
spray-pyrolysis
phase-stability
powders
nanopowder
route
ysz
precursor
Issue Date: 2010
Publisher: ELSEVIER SCI LTD
Citation: CERAMICS INTERNATIONAL, 36(2), 561-566
Abstract: 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. .
URI: 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
ISSN: 0272-8842
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