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

IF 1.8 4区 化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Mendeleev Communications Pub Date : 2024-07-01 DOI:10.1016/j.mencom.2024.06.043
Albina A. Valeeva , Evgeny Yu. Gerasimov , Olga G. Reznitskikh
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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.

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氧化钛 β-Ti3O5 的粒度对其热稳定性的影响
研究证实,氧化钛 β-Ti3O5 的粒度对加热过程中的相形成过程和颗粒稳定性有很大影响。研究表明,在大约 456 K 的温度下,β-Ti3O5 微晶体会发生可逆的一阶相变,其中低温的 β-Ti3O5 相会转变为高温的 λ- Ti3O5 相,而在较高温度下,β-Ti3O5 相会被部分氧化,形成 Magnéli 相 Ti4O7。研究发现,β-Ti3O5 纳米晶体在氩气环境中不稳定,在温度高于 400 K 时,β-Ti3O5 粉末会被氧化。
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来源期刊
Mendeleev Communications
Mendeleev Communications 化学-化学综合
CiteScore
3.00
自引率
21.10%
发文量
226
审稿时长
4-8 weeks
期刊介绍: Mendeleev Communications is the journal of the Russian Academy of Sciences, launched jointly by the Academy of Sciences of the USSR and the Royal Society of Chemistry (United Kingdom) in 1991. Starting from 1st January 2007, Elsevier is the new publishing partner of Mendeleev Communications. Mendeleev Communications publishes short communications in chemistry. The journal primarily features papers from the Russian Federation and the other states of the former USSR. However, it also includes papers by authors from other parts of the world. Mendeleev Communications is not a translated journal, but instead is published directly in English. The International Editorial Board is composed of eminent scientists who provide advice on refereeing policy.
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