Effect of ZrO2 addition on crystallization and properties of the glass-ceramics contained NaNbO3 crystals

► The Zirconia is added to the nominal glass composition as to control the viscosity of the glass melts. ► The help of zirconia content is to protect the early crystallization of sodium niobate during quenching which is unwanted process. ► The zirconia also allows devitrification process undergo efficiently with obtaining good microstuctural arrangement in the the glass-ceramics products. ► However, presence of the zirconia in the glass matrix suppress the dilectric respond of the glass-ceramics.