Nanotubes Made from Deeply Undercooled Cryolite/Alumina Melts

✍ Scribed by Michal Korenko; Marián Kucharík; Jozef Vincenc Oboňa; Dušan Janičkovič; Rosa Córdoba; José María De Teresa; Blanka Kubíková

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: German
• Weight: 833 KB
• Volume: 91
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.200890150

✦ Synopsis

Abstract

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).