caa a22 4500 388020210 CHVBK 20180307124922.0 cr unu---uuuuu 161130e199804 xx s 000 0 eng 10.1557/JMR.1998.0127 doi S0884291400043648 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0127 Synthesis of hollandite-type KxGaxSn8−xO16 fine particles by the sol-gel method [Elektronische Daten] 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. Copyright © Materials Research Society 1998 Fujimoto Kenjiro Department of Industrial Chemistry, Faculty of Science and Technology, Science University of Tokyo, Yamazaki 2641, Noda, Chiba 278, Japan Watanabe Mamoru National Institute for Research in Inorganic Materials, Namiki 1-1, Tsukuba, Ibaraki 305, Japan Mori Toshiyuki National Institute for Research in Inorganic Materials, Namiki 1-1, Tsukuba, Ibaraki 305, Japan Ito Shigeru Department of Industrial Chemistry, Faculty of Science and Technology, Science University of Tokyo, Yamazaki 2641, Noda, Chiba 278, Japan Journal of Materials Research Cambridge University Press 13/4(1998-04), 926-929 0884-2914 13:4<926 1998 13 JMR https://doi.org/10.1557/JMR.1998.0127 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0127 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fujimoto Kenjiro Department of Industrial Chemistry, Faculty of Science and Technology, Science University of Tokyo, Yamazaki 2641, Noda, Chiba 278, Japan NATIONALLICENCE 700 1- Watanabe Mamoru National Institute for Research in Inorganic Materials, Namiki 1-1, Tsukuba, Ibaraki 305, Japan NATIONALLICENCE 700 1- Mori Toshiyuki National Institute for Research in Inorganic Materials, Namiki 1-1, Tsukuba, Ibaraki 305, Japan NATIONALLICENCE 700 1- Ito Shigeru Department of Industrial Chemistry, Faculty of Science and Technology, Science University of Tokyo, Yamazaki 2641, Noda, Chiba 278, Japan NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/4(1998-04), 926-929 0884-2914 13:4<926 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge