Niobium Powders of Mesoporous Structure
- Авторлар: Orlov V.M.1, Kryzhanov M.V.1, Knyazeva A.I.1, Osaulenko R.N.2
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Мекемелер:
- Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
- Petrozavodsk State University
- Шығарылым: Том 54, № 5 (2018)
- Беттер: 782-787
- Бөлім: Nanoscale and Nanostructured Materials and Coatings
- URL: https://journals.rcsi.science/2070-2051/article/view/204361
- DOI: https://doi.org/10.1134/S2070205118040111
- ID: 204361
Дәйексөз келтіру
Аннотация
The mesoporous structure of niobium powders of specific surface areas from 32 to 150 m2/g obtained through reduction of niobium-oxide compounds by magnesium vapors has been investigated. A doubling of the specific surface area of magnesium-thermic niobium powders in comparison to tantalum powders has been shown to be caused by the larger volume and smaller size of pores. For a powder with a specific surface area of 150 m2/g, 90% of the surface is governed by pores of sizes smaller than 5 nm. Although the X-ray pattern of the powder corresponds to the metal niobium, 96.5% of this powder weight consists of a natural surface-oxide film, according to the TGA data. The thickness of this oxide decreases in comparison with the surface oxide on the compact metal depending on the powder mesoporous structure.
Авторлар туралы
V. Orlov
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
Хат алмасуға жауапты Автор.
Email: orlov@chemy.kolasc.net.ru
Ресей, Apatity, Murmansk oblast, 184209
M. Kryzhanov
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
Email: orlov@chemy.kolasc.net.ru
Ресей, Apatity, Murmansk oblast, 184209
A. Knyazeva
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
Email: orlov@chemy.kolasc.net.ru
Ресей, Apatity, Murmansk oblast, 184209
R. Osaulenko
Petrozavodsk State University
Email: orlov@chemy.kolasc.net.ru
Ресей, Petrozavodsk, Republic of Karelia, 185910
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