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
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Creator |
OJHA, PK
RATH, SK CHONGDAR, TK KULKARNI, AR |
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Subject |
thin-films
electrical-properties nonisothermal synthesis spray-pyrolysis phase-stability powders nanopowder route ysz precursor precursors: organic nanocrystalline ysz |
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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. .
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Publisher |
ELSEVIER SCI LTD
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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 |
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Type |
Article
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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 |
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Language |
en
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