Effects of Calcination Atmosphere and Temperature on Phase Evolution of Coprecipitated Ti-V-O Oxides

저자

박*우,권혜진,이주신,박주철,김종헌,김창규

게재저널

http://eml.kim.or.kr/default.asp

키워드

vanadium-doped titania, coprecipitation, anatase, rutile, Calcination

개요

Ti1-xVxO2 oxides were produced by a coprecipitation process using TiCl4 and VOCl3 as starting materials. As-precipitated gels were calcined at 500~800°C, either in a vacuum or oxygen atmosphere. Effects of the calcination atmosphere and temperature on the phase transition of crystalline Ti-V-O oxides were studied.
Calcination in an oxygen atmosphere produced Ti-V-O oxides, which are mixtures of TiO2 and V2O5 oxides formed for all the calcination temperatures. Calcinations at 800°C in vacuum resulted in the formation of a rutile Ti1-xVxO2 single phase for all compositions of vanadium. A significant portion of vanadium ions is incorporated into the TiO2 lattice, which consistently decreases the lattice parameters of the rutile Ti1-xVxO2 phase as the vanadium addition increases.

첨부파일

• 51. 김창규_Electronic Materials Letters Vol7 No4 (2011. 12)p.327_331.pdf [2,436,706 byte]

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