Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/98523
Title: Unique dielectric behavior of 0.6Pb(Ni1/2W1/2)O3·0.4PbTiO3 derived from mechanical activation
Authors: Gao, X. 
Xue, J. 
Wang, J. 
Yu, T. 
Shen, Z.X. 
Issue Date: May-2003
Source: Gao, X.,Xue, J.,Wang, J.,Yu, T.,Shen, Z.X. (2003-05). Unique dielectric behavior of 0.6Pb(Ni1/2W1/2)O3·0.4PbTiO3 derived from mechanical activation. Journal of the American Ceramic Society 86 (5) : 791-794. ScholarBank@NUS Repository.
Abstract: 0.6Pb(Ni1/2W1/2)O3·0.4PbTiO 3(0.6PNW·0.4PT) of complex perovskite structure is successfully synthesized by mechanical activation of mixed oxide composition, followed by sintering at 950°C. It exhibits a considerably stable temperature dependence of dielectric constant over the wide temperature range of -120° to 20°C, although there occurs a dielectric peak at around 74°C. Raman spectroscopic studies show the coexistence of tetragonal and pseudocubic perovskite phases on sintering at 950°C, which are attributed to the inhomogeneous distribution of PbTiO3 arising from mechanical activation. The dielectric behaviour can be fine tuned by thermal annealing at 750°C, leading to phase redistribution in PNW-PT.
Source Title: Journal of the American Ceramic Society
URI: http://scholarbank.nus.edu.sg/handle/10635/98523
ISSN: 00027820
Appears in Collections:Staff Publications

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