Abstract
Crystallization process of ferroelectric-based BaTi 2 O 5 -glass (BTO125-glass) is studied by Raman scattering. Spectral change observed in the present study clarifies successive occurrence of two metastable phases in the crystallization. Variations of spectral intensities on isothermal crystallization are analyzed using Johnson-Mehl-Avrami equation to reveal the crystallization process of each phase. From the result, a homogeneous 3-dimensional growth of α phase and surface 3-demensional growth of β phase are concluded to be taken place gradually in the crystallization.