Structural Characterizations and Dielectric Properties of Sphere- and Rod-Like PbTiO3 Powders Synthesized via Molten Salt Synthesis

Nanoscale Research Letters
Qing JiXinhua Zhu

Abstract

By reaction of PbC2O4 and TiO2 in the eutectic NaCl-KCl salts, both sphere- and rod-like PbTiO3 (PTO) powders were synthesized via molten salt synthesis (MSS) and template MSS methods, respectively. X-ray diffraction patterns reveal that all the PTO powders crystallize in a tetragonal phase structure. Increasing the molar ratio of PbC2O4:TiO2:NaCl:KCl from 1:1:10:10 to 1:1:60:60 in the MSS process has little effect on the sphere-like morphology of the PTO powders synthesized at 950 °C for 5 h. Large-scale polycrystalline rod-like PTO powders with diameters of 480 nm-1.50 μm and lengths up to 10 μm were synthesized at 800 °C for 5 h by template MSS method, where the rod-like anatase TiO2 precursors were used as templates and the molar ratio of PbC2O4:TiO2:NaCl:KCl was equal to 1:1:60:60. X-ray energy dispersive spectroscopy spectra reveal that all the PTO powders are composed of Pb, Ti, and O elements, and the measured Pb:Ti atomic ratios are close to 1:1. In the template MSS process, the molten salt content plays an important role in forming the rod-like PTO powders. Under low molten salt content, the rod-like PTO powders cannot be synthesized even if the rod-like TiO2 templates are used. In addition, prolonging the reaction ti...Continue Reading

References

Nov 17, 2001·Chemical Reviews·M A Peña, J L Fierro
Aug 1, 2007·Inorganic Chemistry·Zongying CaiGuirong Liu
Mar 1, 2008·Inorganic Chemistry·Per Martin RørvikMari-Ann Einarsrud
Dec 17, 2016·Physical Chemistry Chemical Physics : PCCP·Cheng LuGang Bao
Feb 1, 2016·Chemical Science·Lihong LiXianran Xing

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