Raman scattering studies on the sintering process in PbO-TiO₂ system

Abstract

Investigations have been made on the sintering process of PbTiO₃ from the mixed PbO-TiO₂ system by means of Raman scattering measurements. It has been observed that the Raman spectrum changes from the initial state PbO-TiO₂ mixed system to the crystalline state of PbTiO₃. The Raman spectrum from the initial state shows a superposed pattern of PbO and TiO₂ modes. An almost similar spectral pattern to that from the perfect crystalline powder of PbTiO₃ is first obtained in the sample fired around 700°C. As the firing temperature increases, the spectral pattern changes gradually to that of PbTiO₃. The behavior of PbO and TiO₂ modes in this process is discussed.