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Nanotubes Made from Deeply Undercooled Cryolite/Alumina Melts
Author(s) -
Korenko Michal,
Kucharík Marián,
Oboňa Jozef Vincenc,
Janičkovič Dušan,
Córdoba Rosa,
De Teresa José María,
Kubíková Blanka
Publication year - 2008
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.200890150
Subject(s) - cryolite , scanning electron microscope , chemistry , energy dispersive x ray spectroscopy , diffraction , infrared spectroscopy , spectroscopy , chemical engineering , crystallography , aluminium , materials science , composite material , optics , organic chemistry , physics , quantum mechanics , engineering
The rapid‐solidification processing (by a cooling rate of 10 5 –10 6 K/s) was used for the preparation of deeply undercooled cryolite/alumina (Na 3 AlF 6 /Al 2 O 3 ) melts. We found a mass of nanotubes on the surface of these undercooled melts. The nanotubes were preferentially located on the defect places of the surface with the following approximate dimensions: base≈100×100 nm, length≈1000 nm. The solidified samples with the nanotubes on the surface were analyzed by scanning electron microscopy (SEM), energy‐dispersive X‐ray spectroscopy (EDX), X‐ray diffraction (XRD), and infrared spectroscopy (IR).