Development of fast formation process for synthesizing submicron lead magnesium niobate perovskite powder
Resource
Materials Science and Engineering B 84 (3): 159-162
Journal
Materials Science and Engineering B
Journal Volume
84
Journal Issue
3
Pages
159-162
Date Issued
2001
Date
2001
Author(s)
Yang, Hsien-Sheng
Abstract
The characteristics of the solid-state reaction for synthesizing ultrafine Pb(Mg1/3Nb2/3)O3 powder using a new percursor, Mg4Nb2O9 have been investigated. Quenching the mixtures of Mg4Nb2O9 with excess PbO at 850-900°C without further soaking rapidly leads to the complete formation of perovskite phase without pyrochlore phase. Some residual MgO exists in samples; however, MgO is completely eliminated by nitric acid, thereby producing monophasic Pb(Mg1/3Nb2/3)O3. This process confirms the feasibility to synthesize Pb(Mg1/3Nb2/3)O3 in a fast reaction route. The addition of excess PbO enhances the formation rate of Pb(Mg1/3Nb2/3)O3, and also decreases the minimum temperature required for preparing pure perovskite phase. The particle size of obtained Pb(Mg1/3Nb2/3)O3 powder is within the range of submicron meter, and increases with the increasing amount of PbO used. © 2001 Elsevier Science B.V.
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journal article
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