2024-03-28T14:20:15Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/739442022-11-17T02:08:08Zhdl_2115_20045hdl_2115_139Effects of Electric Field on the Formation of Titania Nanocrystals on SiO2-TiO2 Gel Coatings during Hot Water Treatment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MATSUDA, AtsunoriKOBAYASHI, KumpeiKOGURE, ToshihiroSAKAI, MototsuguTADANAGA, KiyoharuMINAMI, TsutomuTATSUMISAGO, MasahiroSol-gelCoatingHot water treatmentElectric fieldTitaniaNanocrystalsVector field573Sol-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+.Ceramic Society of JapanJournal Articleapplication/pdfhttp://hdl.handle.net/2115/73944https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/73944/1/JCS113.333-335.pdf0914-54001348-6535AN10040326Journal of the Ceramic Society of Japan11313163333352005-04enginfo:doi/10.2109/jcersj.113.333https://creativecommons.org/licenses/by-nd/4.0/deed.japublisher