Effect of external fields applied during hot-water treatment on the aspect ratio of nanocrystallites formed on SiO2·TiO2 coatings derived from sol–gel techniques

Prastomo, Niki and Kimata, Kouji and Daiko, Yusuke and Muto, Hiroyuki and Kogure, Toshihiro and Sakai, Mototsugu and Matsuda, Atsunori (2010) Effect of external fields applied during hot-water treatment on the aspect ratio of nanocrystallites formed on SiO2·TiO2 coatings derived from sol–gel techniques. Journal of Sol-Gel Science and Technology, 56. pp. 345-352. ISSN 1573-4846

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Abstract

SiO2·TiO2 coatings were prepared by a sol–gel route. The effect of the external fields including mechanical vibration and electric charge applied during hot-water treatment on titania precipitation at the surface of the coatings was investigated. The shape of the resulting precipitates tended to elongate by applying vibration in a parallel or perpendicular direction, or by applying an electric charge. The organization of titania nanocrystallites possibly occurs because of the concentration gradient of dissolved titania species generated by the external fields during the hot-water treatment. A maximum aspect ratio of 38.1 was achieved for the precipitate prepared by hot-water treatment performed under parallel vibration for 5 h. The shape of the resulting precipitates was also influenced by the content of TiO2 in the SiO2·TiO2 coating, with a smaller proportion of TiO2 increasing the aspect ratio of the resulting precipitate.

Item Type: Article
Uncontrolled Keywords: Sol–gel coating, External field, Hot-water treatment, Titania nanosheet
Subjects: 500 Science and Mathematic > 500 Science > 507 Education, Research, Related Topics
Divisions: Fakultas Teknik Informatika > Program Studi Teknik Fisika
Depositing User: mr admin umn
Date Deposited: 09 Dec 2021 17:20
Last Modified: 09 Dec 2021 17:20
URI: http://kc.umn.ac.id/id/eprint/19449

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