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Study of the preparation process for BaO-Al2O3-SiO2 powders by a two-step method

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Abstract

BaO-SiO2 and Al2O3-SiO2 dried gel powders were prepared by the sol-gel process using TEOS, aluminium nitrate and barium acetate as raw materials. By using these starting materials, β-BaAl2Si2O8 (hexacelsian) powders with small particle size were obtained after calcining at 1000 °C. The effects of solvents and prehydrolysis of TEOS on the gelation were studied. The physical and chemical changes, and phase transformation of the gel powders for BaO (Al2O3)-SiO2 and BaO-Al2O3-SiO2 systems during heating were examined using differential thermal analysis, gas chromatography and X-ray diffraction. The particle sizes of the gel powders obtained were also observed by SEM and TEM.

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References

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Authors and Affiliations

  1. Department of Inorganic Materials, East China University of Science and Technology, 200237, Shanghai, People's Republic of China

    Liu Zhien, Hu Ying & Yuan Jianjun

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  1. Liu Zhien
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  2. Hu Ying
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  3. Yuan Jianjun
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Zhien, L., Ying, H. & Jianjun, Y. Study of the preparation process for BaO-Al2O3-SiO2 powders by a two-step method. JOURNAL OF MATERIALS SCIENCE 30, 405–409 (1995). https://doi.org/10.1007/BF00354404

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  • DOI: https://doi.org/10.1007/BF00354404

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