Raman scattering study of microcrystals of perovskite titanates

ABSTRACT

Microcrystals of several perovskite titanates (ATiO₃, A:Pb, Mn, Ni, Co, Mg) have been synthesized by the corrosion product method. The products were characterized by XRD, SEM, and Micro-Raman scattering. The average size of the microcrystals is estimated to about 2 μm by the scanning electron microscope. Micro-Raman scattering spectra show the typical line shapes corresponding to the crystal structures of ATiO₃. In the trigonal MgTiO₃, the intensities of the several Raman modes take the maximum value at 50°C as temperature increase from room temperature. It is indicated that the peaks are caused by the impurities rather than the structural change.

KEYWORDS:

• Corrosion product
• perovskite oxide
• Raman scattering
• microcrystal