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XRD, TEM and Raman scattering studies of PbTiO 3 nanopowders
Author(s) -
Szafraniak I.,
Połomska M.,
Hilczer B.
Publication year - 2006
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200510628
Subject(s) - raman spectroscopy , materials science , laser linewidth , raman scattering , diffraction , powder diffraction , crystallography , analytical chemistry (journal) , optics , chemistry , laser , physics , chromatography
Lead titanate nanopowders were fabricated by mechanochemical synthesis. The obtained materials were characterized by X‐ray diffraction, high resolution electron microscopy and Raman scattering. The X‐ray diffraction showed the perovskite structure of the powder. It was found that: (1) the powder consists of loosely packed grains with a broad distribution of sizes between a few nm and 45 nm, (2) the grains of sizes larger than about 30 nm exhibit well developed crystalline structure, (3) the Raman lines of PbTiO 3 nanopowder exhibit a conspicuous broadening in comparison to Raman lines of the bulk material, and 4) in the spectrum of nanopowder the lines related to A 1 (1TO), E(2TO) and A 1 (3TO) modes are shifted into lower frequencies and their spectral linewidth increase and there is no significant change in frequency shift for the remaining modes. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)