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Low-Temperature, Single Step, Reactive Sintering of Lead Magnesium Niobate Using Mg(OH)2-Coated Nb2O5 Powders

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A low-temperature, single step, reactive sintering method for Pb(Mg1/3Nb2/3)O3 (PMN) and PMN–PbTiO3 (PMN–PT) processing was developed based on the coating of Mg(OH)2 on Nb2O5. This method simplified the processing of PMN and PMN–PT to a single step of heat-treatment and decreased the sintering temperature to 1000°C. It was found that the pyrochlore phase formation reaction at 500°C reduced the particle size to 130 nm. The overlap of the pyrochlor-perovskite phase transformation between 700° and 900°C and the densification process between 800° and 1000°C improved the sintering process. These two factors were the major reasons of the low temperature sintering.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2005.00324.x

Affiliations: Department of Materials Science & Engineering, Drexel University, Philadelphia, Pennsylvania 19104

Publication date: June 1, 2005

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