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Effects of Electric Field on the Formation of Titania Nanocrystals on SiO2-TiO2 Gel Coatings during Hot Water Treatment

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Title: Effects of Electric Field on the Formation of Titania Nanocrystals on SiO2-TiO2 Gel Coatings during Hot Water Treatment
Other Titles: 電場が温水処理に伴うSiO2-TiO2系ゲルコーティング膜のチタニア微結晶生成に及ぼす影響
Authors: MATSUDA, Atsunori1 Browse this author
KOBAYASHI, Kumpei2 Browse this author
KOGURE, Toshihiro3 Browse this author
SAKAI, Mototsugu4 Browse this author
TADANAGA, Kiyoharu5 Browse this author →KAKEN DB
MINAMI, Tsutomu6 Browse this author
TATSUMISAGO, Masahiro7 Browse this author
Authors(alt): 松田 , 厚範1
小林, 薫平2
小暮, 敏博3
逆井, 基次4
忠永, 清治5
南, 努6
辰巳砂, 昌弘7
Keywords: Sol-gel
Hot water treatment
Electric field
Vector field
Issue Date: Apr-2005
Publisher: Ceramic Society of Japan
Journal Title: Journal of the Ceramic Society of Japan
Journal Title(alt): 日本セラミックス協会学術論文誌
Volume: 113
Issue: 1316
Start Page: 333
End Page: 335
Publisher DOI: 10.2109/jcersj.113.333
Abstract: Sol-gel derived SiO2-TiO2 coatings on indium tin oxide (ITO)-coated glass substrates were treated with hot water at 90°C under electric field aiming at the control of morphology and crystalline phase of the titania precipitates. The shape of the precipitates on 75SiO2•25TiO2 (mol%) coating at the negative electrode changed from granular to ramiform by applying an electric field to the substrates during the treatment, whereas such changes in the shape of titania nanocrystals with the electric field were not observed at the positive electrode. The granular and ramiform precipitates were identified as anatase (TiO2) and hydrated titania (n(TiO2)•mH2O), respectively. The ramiform shape of the titania precipitates became significant with increasing the applied voltage, while the coatings gradually dark-colored due to the reduction of Ti4+ to Ti3+.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 忠永 清治

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