Characterization of Al2(WO4)3 Synthesized by Co-Precipitation Method

E.S.G. Junior; P.M . Jardim

doi:10.4028/www.scientific.net/MSF.798-799.85

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HomeMaterials Science ForumMaterials Science Forum Vols. 798-799Characterization of Al2(WO4)3 Synthesized by...

Characterization of Al₂(WO₄)₃ Synthesized by Co-Precipitation Method

Abstract:

Al₂(WO₄)₃ was synthesized by co-precipitation using Na₂WO₄ and Al (NO₃)₃ as precursors. After drying the precipitate, it was calcined at different temperatures between 500°C and 800°C. The crystallization and degradation temperatures of the samples were evaluated by means of Differential Scanning Calorimetry (DSC), Thermogravimetry (TG) and X-Ray Diffraction (XRD). It was observed that the crystallization starts at around 600°C, however Transmission Electron Microscopy (TEM) analysis showed that at this temperature the sample is partially amorphous. The degradation of the material starts at around 1200°C and at 1400°C the tungsten oxide has almost completely evaporated and the material is transformed mainly in alpha-alumina.

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Periodical:

Materials Science Forum (Volumes 798-799)

Pages:

85-89

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.798-799.85

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Online since:

June 2014

Authors:

E.S.G. Junior*, P.M . Jardim

Keywords:

Aluminum Tungstate, Co-Precipitation, Nanosized Powders, Synthesis

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