Raman Scattering Investigation of the Phase Transition in Nanocrystalline (Pb0.9-xLa0.1Cax)Ti0.975O3 Powders

Abstract

Abstract: Nanocrystalline (Pb_0.9-xLa_0.1Ca_x)Ti_0.975O₃ (PLCT) powders were prepared by the sol-gel technique. The average grain size of the powders is
from 20 to 40nm. The structure of the PLCT powders was investigated by using Raman scattering and X-ray diffraction analyses. The experimental results show that
low frequency phonon mode of PLCT (100x) Raman spectrum is attributed to the deviation of Ca²⁺ and La³⁺ in A location of the perovskite structure;
and high frequency phonon mode is attributed to the deformation of TiO₆ octahedron, which is resulted by the deviation of the atoms in TiO₆ octahedron from ideal position.

Key words: sol-gel technique, （Pb_0.9-xLa_0.1Ca_x）Ti_0.975O₃ nano-powders, Raman scattering

CLC Number:

TB383

YUAN Xiao-Wu,ZHU Jian-Guo,XIAO Ding-Quan,ZHU Ju-Mu,YU Ping. Raman Scattering Investigation of the Phase Transition in Nanocrystalline (Pb_0.9-xLa_0.1Ca_x)Ti_0.975O₃ Powders[J]. Journal of Inorganic Materials.

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Raman Scattering Investigation of the Phase Transition in Nanocrystalline (Pb_0.9-xLa_0.1Ca_x)Ti_0.975O₃ Powders

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