Preparation, Characterization and Thermal Stability of the Solid Solution Sn0.5Ti0.5O2 Prepared by Sol-gel Method

Abstract

Abstract: Sn_0.5Ti_0.5O₂ solid solution was prepared by sol-gel method. The structure and thermal stability of the Sn_0.5Ti_0.5O₂ solid solution were investigated by X-ray diffraction(XRD), differential thermal analysis(DTA) and infrared spectra(IR) methods. The thermal-stability of the solid solution Sn_0.5Ti_0.5O₂ depends on the original water bath temperature. In the XRD patterns, the phase separation phenomenon was observed in the gel samples prepared over a 40℃ water bath and sintered at 1 000℃ and the Sn-rich and Ti-rich phases appeared. The solid solution synthesized at 60℃ water bath temperatures had a good thermal-stability after being sintered at 1 000℃ and the phase separation phenomenon appeared after being sintered at 1200℃. But the phase separation phenomenon wasn′t observed in the 80℃ gel samples prepared over a 80℃ water bath and sintered at 1 200℃ and the only existent phase was still ascribed to the solid solution Sn_0.5Ti_0.5O₂. Furthermore, the DTA curves of three samples synthesized at different water bath temperatures show that the sample prepared over a 40℃ water bath has the worst thermal-stability and the sample prepared over a 80℃ water bath has the best thermal-stability.

Key words: Sol-gel method, Sn 0.5Ti 0.5O₂, Thermal-stability, Phase separation

CLC Number:

O641
TP212.2

TrendMD:

LIU Feng-Min, QUAN Bao-Fu, CHEN Li-Hua, LIU Zhi-Qiang, YU Lian-Xiang, LIU Kui-Xue . Preparation, Characterization and Thermal Stability of the Solid Solution Sn_0.5Ti_0.5O₂ Prepared by Sol-gel Method[J]. Chem. J. Chinese Universities, 2004, 25(9): 1597.

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Preparation, Characterization and Thermal Stability of the Solid Solution Sn_0.5Ti_0.5O₂ Prepared by Sol-gel Method

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