Field-assisted Isothermal Oriented Crystallization of SrO-TiO{sub}2-SiO{sub}2 Polar Glass-Ceramics

摘要

The polar glass-ceramics of 2.0SrO-1.0TiO{sub}2-2.9SiO{sub}2 system were prepared by the process of recrystallization with additional applied isothermal and electric field. The results showed that the glass-ceramics piezoelectric constant d{sub}33 was 12×10{sup}(-12) C/N. The study of its oriented crystallization by SEM and XRD indicated that Sr{sub}2TiSi{sub}2O{sub}8 crystal performed oriented growth, which was perpendicular to the glass surface and made it be orientally crystallized with the assisted the isothermal and electric field. The further experimental results showed that the additional electric field reduced the crystallization activation energy, which provided a force for the isothermal orientating crystallization process.