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Microstructures and Photoluminescence in Nanocrystalline Barium Titanate

Published online by Cambridge University Press:  10 February 2011

M. S. Zhang ,
J. Yu ,
W. F. Zhang ,
Z. Yin  and
W. C. Chen
M. S. Zhang
Affiliation:
Center for Materials Analysis and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, P. R. China, mszhang@nju.edu.cn
J. Yu
Affiliation:
Center for Materials Analysis and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, P. R. China, mszhang@nju.edu.cn
W. F. Zhang
Affiliation:
Center for Materials Analysis and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, P. R. China, mszhang@nju.edu.cn
Z. Yin
Affiliation:
Center for Materials Analysis and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, P. R. China, mszhang@nju.edu.cn
W. C. Chen
Affiliation:
Institute of Physics, Academia Sinica, Beijing 100080, P. R. China
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Abstract

Barium titanate ultrafine particles are prepared by hydrothermal method at low temperature. Their phase structures and photoluminescence (PL) properties are examined by X-ray diffraction and Raman spectroscopy. The critical size of the cubic-tetragonal phase transition is about 48 nm and the lattice parameter ratio c/a equals 1.003. Strong photoluminescence is observed with central frequency located at 695 nm. The spectral behaviors at different annealing times and temperatures are studied. We attribute them to the semiconducting hexagonal phase embeded in the nanophase cubic BaTiO3to form trap centers and cause PL process.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 520: Symposium P – Nanostructured Powders & Their Industrial Application , 1998 , 211
Copyright
Copyright © Materials Research Society 1998

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References

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