| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Research Abstract |
Aqueous precursors for titania and silica were prepared using titan tetraisopropoxide and silicon tetraethoxide, respectively, with addition of tetramethylammonium hydroxide. Appropriate amount of the two precursors were mixed and silica-titania composite films were dip-coated. After heating at 700C, the resultant films were reduced under nitrogen-hydrogen mixture or nitrogen with low oxygen partial pressure, which was controlled using zirconia oxygen pump. The temperatures of the reduction were 1000 and 1200C for up to 1 week.
By reducing in nitrogen-hydrogen mixture gas, the formation of Ti3O5 was confirmed. On the other hand, the films reduced under the controlled low oxygen partial pressure of 10e-22 atm were not. The conditions of reduction in low oxygen partial pressure at tested temperatures are enough to reduce titanium dioxide. A reason why the reduced oxide was not detected was an evaporation of the reduced oxide and this was suggested by some experiments.
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