FT-RAMAN SPECTROSCOPIC STUDY OF Pb_1−xCa_xTiO₃ NANOCRYSTALS

Abstract

FT-Raman Spectra of Pb_1−x Ca _x TiO₃ nanocrystals with different lanthanum amounts were measured at 288 K and 378 K. Several nanocrystals of Pb_0.85Ca_0.15TiO₃ with different grain size were also prepared at 288 K. The effects of the amount of lanthanum, grain size and temperature on phonon frequency were discussed in details. Furthermore, the conclusion that lattice expansion's presentation in PCT nanocrystals can be obtained by the frequency comparison of PCT nanocrystal of x ≥ 0.2 with ceramic doped with the same amount of calcium.

Keywords:

• Calcium modified lead titanate
• Nanocrystal
• FT-Raman spectra
• Phonon

Acknowledgments