Formation Mechanism of SrBi2Nb2O9 Prepared by Melting Salt Method

Bao Rang Li; Xing Tao Liu; Yang Sheng Zheng; Hui Bin Chang

doi:10.4028/www.scientific.net/AMR.177.12

Paper Titles

Preface

Foundation of the Standard Curve Database for Quantitative Analysis by Internal Standard Method Based on XRD
p.1

Synthesis and Characterization of CoO₂ Nanosheets
p.5

Synthesis, Structure and Properties of Super Fine LiMn₂O₄
p.9

Formation Mechanism of SrBi₂Nb₂O₉ Prepared by Melting Salt Method
p.12

Determination of Heavy Metals in Inorganic Materials by XRF
p.16

Particle Shape Characterization of Inorganic Powders by SEM and Image Analysis
p.18

Determination of Particle Size Distribution of Nano-TiO₂ Coating Film by AFM and Image Analysis
p.22

Application of Raman Spectroscopy on Size Driven Phase Transition in Bismuth Titanate
p.25

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Formation Mechanism of SrBi₂Nb₂O₉ Prepared by Melting Salt Method

Abstract:

In this paper SrBi2Nb2O9 was prepared by molten salt synthesis method and KCl chosen as molten medium. In order to disclose possible formation mechanism of SrBi2Nb2O9, a simple route was established for comparison by dividing the starting precursors into four groups. With the help of XRD, possible synthesis route was analyzed. The results showed that pure SrBi2Nb2O9 powders could be obtained at temperature higher than 700oC by molten salt synthesis. Intense synthesis reaction happened in the temperature range from 500 to 700oC. The reaction mechanisms of SrBi2Nb2O9 included four steps, namely the formation of 1) SrBi2O4 at close to 600oC,2) BiNbO4 from the reaction of at 600-700 oC, 3) SrBi2Nb2O9 from the reaction of SrBi2O4 and Nb2O5 and 4)SrBi2Nb2O9 from the reaction of BiNbO4 and SrCO3. The molten salt could improve distribution and reactivity of the precursors and significant formation of SrBi2Nb2O9.