X-ray diffraction and Raman spectroscopy studies in Na_1/2Bi_1/2TiO₃-SrTiO₃-PbTiO₃ solid solutions

ABSTRACT

The long and short range orders in 0.4Na_1/2Bi_1/2TiO₃-(0.6-x)SrTiO₃-xPbTiO₃ solid solutions were studied by x-ray diffraction and Raman spectroscopy. X-ray diffraction patterns for these compositions in the relaxor state are different for bulk and powdered samples. It was found that, in spite of different tetragonality depending on PbTiO₃ content, the Raman spectra suggest similarity of local structure for all studied compositions. Both methods indicate a disappearance of tetragonal phase upon increasing temperature.

KEYWORDS:

• NBT solid solution
• structure
• XRD
• Raman spectroscopy

Funding

This work has been funded by the National Research program in the framework of project “Multifunctional Materials and composites, photonics and nanotechnology (IMIS²).”