Title :
Synthesis and characterisation of AlB2 nanopowders by solid state reaction
Author :
Chunmei Jiang ; Yongjun Ma ; Fengqi Zhao ; Lun Wei ; Heng Zhang ; Chonghua Pei
Author_Institution :
State Key Lab. Cultivation Base for Nonmetal Composites & Functional Mater., Southwest Univ. of Sci. & Technol., Mianyang, China
Abstract :
A simple and effective way for preparing AlB2 nanopowders was developed using solid state reaction with a mixture of nanometre-sized powders of aluminium and amorphous boron. The optimum synthesis conditions and the structural characteristics of the products were carefully investigated by means of X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy and an energy dispersive spectrometer. The best result was obtained at a synthesis temperature of 900°C for 2 h with a molar ratio of 1:1.8. The obtained AlB2 nanopowders consisted of numerous anomalous spherical particles with the grain size ranging from 100 to 200 nm. Furthermore, differential scanning calorimetry analysis showed that the combustion characteristics of the as-prepared AlB2 nanopowders were better than that of the commercial AlB2 powder under the same condition.
Keywords :
X-ray chemical analysis; X-ray diffraction; aluminium compounds; amorphous state; combustion synthesis; differential scanning calorimetry; field emission electron microscopy; grain size; mixtures; nanofabrication; nanoparticles; particle size; scanning electron microscopy; transmission electron microscopy; AlB2; AlB2 nanopowder synthesis; X-ray diffraction; amorphous boron; combustion characteristics; differential scanning calorimetry; energy dispersive spectrometer; field emission scanning electron microscopy; grain size; high-resolution transmission electron microscopy; molar ratio; numerous anomalous spherical particles; powder mixture; solid state reaction; structural characteristics; synthesis temperature; temperature 900 degC; time 2 h;
Journal_Title :
Micro & Nano Letters, IET
DOI :
10.1049/mnl.2013.0665