Kinetic rules of precipitation of thin films of titanium dioxide from the gas phase containing titanium tetraisopropylate |
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Authors: | M V Baryshnikova S E Aleksandrov L A Filatov A B Berberov |
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Institution: | 1. St. Petersburg State Polytechnical University, ul. Politekhnicheskaya 29, St. Petersburg, 195251, Russia
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Abstract: | Precipitation of titanium dioxide layers from the gas phase in the reaction system containing titanium tetraisopropylate and oxygen at the total pressure 1 kPa is studied. It is shown that in the range of 300–500°C the precipitation proceeds in the kinetic regime and is accompanied by the formation of layers of monotonous thickness containing nanocrystalline phases of anatase and rutile. In the temperature range 300–350°C the activation energy value was 92.7 kJ mol?1, and at higher temperatures (up to 500°C) it decreased to 17.5 kJ mol?1. The increase in the precipitation temperature caused the increase in relative amount of rutile in the precipitated layers. |
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