Phase transition and phonon characteristics of PbTiO3 single-crystal nanorods prepared in NaCl flux

DOI

10.2991/icmeme-16.2016.22How to use a DOI?

Keywords

Phase transition, Phonon, TEM, Raman, Nanorod

Abstract

By annealing PbTiO3 (PT) nanoparticles together with surfactants in NaCl flux, single-crystal PT nanorods were prepared with diameters of 60-80nm and lengths of several micrometers. The PT nanorods are in tetragonal phase and grow along the (100) direction. A first-order phase transition from tetragonal (a=3.922 and c=3.963) to cubic (a =c =3.942 ) has been detected at 440oC. With the increasing temperatures from 25oC to 440oC, the Raman mode E(1TO) exhibits a soften behavior from 74cm-1 to 50 cm-1, whereas the mode B1+E keeps its frequency almost unchanged at 286 cm-1. It is also noticed that both frequency and damping constant of mode E(1TO) show rapid changing with temperature only when temperature beyond 380 oC, blow the temperature they change very gradually. To explain the particular properties of the PT nanorods, the formation mechanism and an enhanced size effect have been discussed

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Chengping Zhang
AU  - Zhiqiang Chen
AU  - Yu Deng
PY  - 2016/12
DA  - 2016/12
TI  - Phase transition and phonon characteristics of PbTiO3 single-crystal nanorods prepared in NaCl flux
BT  - Proceedings of the 5th International Conference on Mechanical Engineering, Materials and Energy (5th ICMEME2016)
PB  - Atlantis Press
SP  - 125
EP  - 130
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmeme-16.2016.22
DO  - 10.2991/icmeme-16.2016.22
ID  - Zhang2016/12
ER  -