Low Temperature Preparation of Aluminum Titanate Film via Sol-Gel Method

Abstract:

Aluminum titanate (Al₂TiO₅) film was prepared via sol-gel method at low temperature, using ethyl acetoacetate and anhydrous citric acid as compound chelating agent, tetrabutyl titanate (Ti (OC₄H₉)₄) and aluminum chloride (AlCl₃^.6H₂O) as precursors, ethanol as solvent. The phase transformation of Al₂TiO₅ xerogel during heat treatment, the effect of different chelating agents on the synthesis of Al₂TiO₅, and the phase composition and morphology of film were investigated by means of differential thermal and thermo gravimetric analysis (DTA-TG), X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR) and field-emission scanning electron microscopy (FE-SEM). The results demonstrate that Al₂TiO₅ can be synthesized at 750 °C by using compound chelating agent, rather than single chelating agent. Compound chelating agent contributes to the formation of Al-O-Ti heterogeneous bond, which is the key to preparing Al₂TiO₅ at low temperature. High quality Al₂TiO₅ film could be coated on the SiC substract at 750°C.

• Periodical: Advanced Materials Research (Volume 936)
• Pages: 238-242
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.936.238
• Online since: June 2014
• Authors: Yi Bao, Wei Hui Jiang*, Guo Feng, Jian Min Liu, Qian Wu
• Keywords: Aluminum Titanate, Compound Chelating Agent, Film, Sol-Gel Method

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