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Synthesis of hollandite-type KxGaxSn8−xO16 fine particles by the sol-gel method

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Abstract

KxGaxSn8−xO16 (x ≤ 2) powders with hollandite structure were prepared by the sol-gel method using metal alkoxides. Dried gels, when being annealed at 973 K, changed to well-crystallized hollandite powders with about 22 m2/g in BET value which consisted of needle-like crystallites 25 nm wide and 65 nm long in average. The specific surface area was nearly 100 times larger than that of the hollandite produced at 1648 K by the conventional method, and the preparation temperature was lowered by 500 to 700 K. The powders obtained at 973 K were characterized as an attractive porous material showing a pore size distribution profile sharply monodispersed at 10.7 nm in the mesopore range.

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Authors and Affiliations

  1. Department of Industrial Chemistry, Faculty of Science and Technology, Science University of Tokyo, Yamazaki 2641, Noda, Chiba, 278, Japan

    Kenjiro Fujimoto & Shigeru Ito

  2. National Institute for Research in Inorganic Materials, Namiki 1-1, Tsukuba, Ibaraki, 305, Japan

    Mamoru Watanabe & Toshiyuki Mori

Authors
  1. Kenjiro Fujimoto
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  2. Mamoru Watanabe
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  3. Toshiyuki Mori
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  4. Shigeru Ito
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Fujimoto, K., Watanabe, M., Mori, T. et al. Synthesis of hollandite-type KxGaxSn8−xO16 fine particles by the sol-gel method. Journal of Materials Research 13, 926–929 (1998). https://doi.org/10.1557/JMR.1998.0127

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  • DOI: https://doi.org/10.1557/JMR.1998.0127

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