Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/93826
Title: Formation and characterization of lead magnesium niobate synthesized from the molten salt of potassium chlorate
Authors: Wan, D.M. 
Wang, J. 
Ng, S.C. 
Gan, L.M. 
Keywords: Ceramic powders
Dielectric properties
Molten salt synthesis
Perovskite
PMN
Issue Date: 26-Jun-1998
Source: Wan, D.M.,Wang, J.,Ng, S.C.,Gan, L.M. (1998-06-26). Formation and characterization of lead magnesium niobate synthesized from the molten salt of potassium chlorate. Journal of Alloys and Compounds 274 (1-2) : 110-117. ScholarBank@NUS Repository.
Abstract: Lead magnesium niobate powders were prepared by reacting PbO, MgO and Nb2O5 in the molten salt of potassium chlorate. The formation of a single phase perovskite PMN requires a combination of 100 mol % excess lead oxide and a reaction temperature of 900°C. The average particle size of resulting PMN powders increases with increasing reaction temperature and the amount of excess lead oxide added, while the particles undergo a change from a round to a cubical morphology. Too much excess PbO (> 100 mol %) in the starting composition promoted grain growth in the molten salt-derived PMN ceramics, although the sintered density is not much affected at 1200°C and above. It also degrades the dielectric properties of sintered PMN, as a result of the occurrence of PbO-rich precipitates at the grain boundaries and grain junctions. © 1998 Elsevier Science S.A.
Source Title: Journal of Alloys and Compounds
URI: http://scholarbank.nus.edu.sg/handle/10635/93826
ISSN: 09258388
Appears in Collections:Staff Publications

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