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Raman scattering study of the Pb(HfxTi1-x)O-3 ceramics

J Frantti ; H Fujioka ; M Kakihana ; Sten G. Eriksson (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; V Lantto
JOURNAL OF ELECTROCERAMICS 13 (1-3): 299-303 (ISSN: 1385-3449 ). Vol. 13 (2005), p. 299-303.
[Artikel, refereegranskad vetenskaplig]

Raman spectroscopy was used to study the long wavelength vibrations of tetragonal perovskite (space group P4mm) Pb(HfxTi1-x)O-3 (PHT) (0.10 less than or equal to x less than or equal to 0.50) samples at room temperature and at approximate to 20 K. For x less than or equal to 0.40, Raman spectra collected from the PHT samples were very similar to the previous spectra collected from the PZT samples with the same value of x, except the mode at around 190 cm(-1) whose frequency was decreasing with increasing x in PHT ceramics. Correspondingly, the latter feature was taken as a sign of the 'mass effect' (Hf versus Zr) while the similarity of the remaining parts of the Raman spectra was assumed to be due to the almost identical ionic radii difference between Ti4+ and Zr4+ and between Ti4+ and Hf4+ ionic radii. The behaviour of the mode at around 280 cm(-1) revealed that a phase transition occurred once x was changing from 0.40 to 0.50.

Nyckelord: Author Keywords: Raman spectroscopy; peak split; tetragonal; perovskite; lead hafnate titanate


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Denna post skapades 2006-08-25. Senast ändrad 2010-01-26.
CPL Pubid: 12106

 

Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Oorganisk miljökemi (2005-2014)

Ämnesområden

Miljökemi

Chalmers infrastruktur