Abstract
The hydrothermal synthesis of polymorphic titania crystals and their structural evolution from potassium titanates, K2Ti6O13, K2Ti4O9 and K2Ti8O17 whiskers, were studied systematically. Dispersed, regular twinning rutile TiO2 was firstly generated by hydrothermally treating K2Ti6O13 whisker in an acid medium. The crystal phase and morphologies varied with different reaction temperatures and time in diverse mediums were investigated using XRD, SEM and TEM. The results indicate that the weak-binding crystallographic planes are the key factors of the crystal transformation in the hydrothermal system. The transformation from K2Ti6O13 to the twinning rutile is achieved via rearranging structural units on the {100} or {201} plane.
Original language | English |
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Pages (from-to) | 662-668 |
Number of pages | 7 |
Journal | Wuji Cailiao Xuebao/Journal of Inorganic Materials |
Volume | 23 |
Issue number | 4 |
DOIs | |
State | Published - Jul 2008 |
Keywords
- Hydrothermal
- Potassium titanates whisker
- Structural evolution
- Titania