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- Title
Reaction of Niobium Pentachloride with Sodium Borohydride in Ionic Melts.
- Authors
Vinokurov, A. A.; Kovalev, D. Yu.; Nigmatullina, G. R.; Dremova, N. N.; Shilkin, S. P.
- Abstract
We have studied reaction between mechanochemically preactivated NbCl5 and NaBH4 powders in the molar ratio 1 : 2.4 at temperatures from 873 to 1073 K and reaction times from 8 to 15 h under an argon pressure of 4 MPa in ionic melts (Na2B4O7, КСl, KBr,, and 50 mol % NaCl + 50 mol % KCl or 58 mol % LiCl + 42 mol % KCl eutectic mixture). The results demonstrate that the use of the ionic melts makes it possible to obtain almost spherical niobium diboride nanoparticles with an average size from ~12 to 17 nm (depending on reaction temperature), hexagonal structure (sp. gr. P6/mmm), and unit-cell parameters a = 0.3105–0.3125 nm and c = 0.3269–0.3294 nm.
- Subjects
SODIUM borohydride; NIOBIUM; NANOPARTICLE size; MELTING
- Publication
Inorganic Materials, 2022, Vol 58, Issue 8, p838
- ISSN
0020-1685
- Publication type
Article
- DOI
10.1134/S0020168522080143