Inderscience Publishers

Perovskite nanoparticles synthesised by reactive milling combined with thermal processing: preparation, morphology and structure characterisation

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Reactive milling and thermal processing methods were used to prepare a large variety of perovskites like ABO
3
and La
2
NiO
4
. The single-phase nanoparticle of ABO
3
was synthesised at different milling times in dependence on the starting oxides. The grain size of ABO
3
nanoparticles in the range of 10-30 nm was conditional upon milling time. Single-phase nanoparticles of La
2
NiO
4
were obtained by using 6 h milling combined with annealing at 750°C. A structure conversion from a layer into a single perovskite of La
2
NiO
4
was observed as milling time increased, whereas the crystalline structure of ABO
3
remained almost unchanged. Further analysis of HRTEM images confirms a core-shell structure of nanoparticles.

Keywords: perovskite nanoparticles, perovskites, reactive milling, particle size, crystalline size, layer structures, selective area electron diffraction, high resolution TEM, transmission electron microscopy, nanotechnology, thermal processing

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