Sol-gel synthesis and structural characterization of nanocomposite powder: NiAl_2O_4:SiO_2

摘要

Nanocomposite of NiAl_2O_4SiO_2 (NAS) was prepared through insitu sol- gel reaction, in which NiAl_2O_4 nanocrystals were dispersed in the silica glassy matrix. The prepared dried NAS gel, at 338 K, was heat treated to different temperature and identified the temperature range (1083 - 1163 K) of the nanocomposite formation through XRD patterns. From XRD patterns, crystallite size of NiAl_2O_4 particles dispersed in the silica matrix was calculated using Scherrer's equation and size of the crystallites is found to be ≈ 8 nm. The structure and thermal behavior of NAS nanocomposite was identified respectively through FTIR and DSC measurements.