NDLI: Effect of excess Pb on formation of perovskite-type 0.67Pb(Mg$_{1/3}$Nb$_{2/3}$)O$_{3}$-0.33PbTiO$_{3}$ powders synthesized through a sol

Content Provider	Springer Nature Link
Author	Zhang, Y. C. Ye, W. N. Yang, Z. Z. Lu, C. J. Xia, L. H.
Copyright Year	2010
Abstract	Perovskite-type 0.67Pb(Mg$_{1/3}$Nb$_{2/3}$)O$_{3}$-0.33PbTiO$_{3}$ (PMNT) powders were fabricated by using a sol–gel process. Excess Pb(CH$_{3}$COO)$_{2}$·3H$_{2}$O (0, 2, 5, 10 or 15 mol%) was added to starting materials to compensate PbO loss from volatilization during heat treatment. X-ray diffraction (XRD) was employed to investigate the effect of excess Pb on the perovksite phase formation of the PMNT powders. It was found that the optimal level of the excess Pb content is 5 mol%. When the raw materials contained 5 mol% excess Pb, the PMNT powders of purest perovskite form was obtained at the calcination temperature of 850 °C. In the PMNT powders, most part of the intermediate phase was Pb-rich pyrochlore Pb$_{2}$Nb$_{2}$O$_{7}$ which was transformed into perovskite phase after calcination at 650 °C, while the residual pyrochlore phase was Pb-deficient Pb$_{3}$Nb$_{4}$O$_{13}$ which required calcination at a higher temperature (650–850 °C) to transform into perovskite phase. Compared with the conventional solid-state reaction methods and the solution-based methods reported previously, the present sol–gel route is better at synthesizing PMNT powders of perovskite phase at a low temperature.
Starting Page	91
Ending Page	95
Page Count	5
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	22
Issue Number	1
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2010-03-09
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Characterization and Evaluation of Materials Optical and Electronic Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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