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Crystallization and Phase Transition of Titanium Oxide Nanotube Arrays
Author(s) -
Yang Yang,
Wang Xiaohui,
Li Longtu
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.02133.x
Subject(s) - rutile , materials science , crystallization , anatase , nanotube , nucleation , crystallite , chemical engineering , calcination , phase (matter) , phase transition , titanium oxide , nanotechnology , carbon nanotube , metallurgy , chemistry , photocatalysis , condensed matter physics , organic chemistry , physics , engineering , catalysis
The crystallization and phase transition of TiO 2 nanotubes that are >4 μm in length were investigated. The nanotubes initially crystallized in the anatase and rutile phases at 300° and 550°C, respectively. The rutile nucleation occured initially in the nanotube–support interface. On elevating the calcination temperature above 550°C, the rutile crystallites in the nanotube–support interface merged with the nanotubes and finally formed a compact rutile layer at 800°C. During the anatase‐to‐rutile phase transition processing, a (004) preferential orientation occurred due to the regular arrangements of the nanotubes onto the titanium substrate.