Preparation of La2(WO4)3 by Two Step Method and Characterization

Zhen Hu; Hai Lian Yu

doi:10.4028/www.scientific.net/AMR.652-654.791

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Preparation of La₂(WO₄)₃ by Two Step Method and Characterization

Abstract:

Lanthanum tungsten was prepared by two step method with lanthanum oxide, hydrochloric acid and sodium tungstate. The products were characterized by several analytical methods. Fourier transform infrared spectroscopy was used to determine whether the product was Lanthanum Tungsten. X-ray technique was used to study the phase composition. Scanning electron microscopy and scanning probe microscope were used to study micro-structure and surface morphology of powders. X-ray fluorescence spectrometer was used to study its content and impurity. DSC-TG was used to study its thermal stability. The results show that the prepared product is made of lanthanum tungsten mainly, its content of impurity is 3.91%, and there are traces of water in the powder. The prepared lanthanum tungsten has amorphous structure, the thermal stability is good, the powder grains present oval shape, and the diameter of grain is less than 1μm, the powder grains reunit partially.