Communications

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

A. A. Valeeva^a, E. Yu. Gerasimov^b, O. G. Reznitskikh<sup>a

a</sup> Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russian Federation
^b G.K. Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation

Abstract: It was established that the particle size of titanium oxide β-Ti₃O₅ 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-Ti₃O₅ micro crystals undergo a reversible first-order phase transition, in which the low- temperature β-Ti₃O₅ phase is transformed into the high-temperature λ- Ti₃O₅ phase, and at higher temperatures the β-Ti₃O₅ phase is partially oxidized to form the Magnéli phase Ti₄O₇. It was found that β-Ti₃O₅ nanocrystals are unstable in an argon atmosphere and at temperatures above 400 K the β-Ti₃O₅ powder is oxidized.

Keywords: titanium oxide, Ti₃O₅, nanocrystal, XRD, SEM, TEM, TG, DSC.

Language: English

DOI: 10.1016/j.mencom.2024.06.043

Bibliographic databases:

•