Effect of particle size of titanium oxide β-Ti3O5 on its thermal stability.

[Display omitted] It was established that the particle size of titanium oxide β-Ti 3 O 5 has a great influence on the processes of phase formation and the stability of particles during heating. It was shown that at a temperature of about 456 K, β-Ti 3 O 5 micro crystals undergo a reversible first-order phase transition, in which the low- temperature β-Ti 3 O 5 phase is transformed into the high-temperature λ- Ti 3 O 5 phase, and at higher temperatures the β-Ti 3 O 5 phase is partially oxidized to form the Magnéli phase Ti 4 O 7. It was found that β-Ti 3 O 5 nanocrystals are unstable in an argon atmosphere and at temperatures above 400 K the β-Ti 3 O 5 powder is oxidized. [ABSTRACT FROM AUTHOR]