Crystallization studies and dielectric properties of (Ba0.7Sr0.3)TiO3in bariumaluminosilicate glass

Ferroelectric glass–ceramics with a basic composition (1 − y )(Ba 0.70 Sr 0.30 )TiO 3 : y (BaO : Al 2 O 3 : 2SiO 2 ) have been synthesized by the sol–gel method. The major crystalline phase is the perovskite. The crystallization of the ferroelectric phase in the glass matrix have been studied using differential thermal analysis and x-ray diffraction and the kinetic parameters characterizing the crystallization have been determined using an Arrhenius model. Glass contents ≤ 5 mol% promoted liquid phase sintering, which reduced the sintering temperature to 1250 °C. The dielectric permittivity of the glass–ceramic samples decreased and the ferroelectric–paraelectric phase transition became more diffuse with increasing glass content . The dielectric connectivity of the ferroelectric phase in the composite have also been investigated and are reported.