Effect of BaF2 Addition on Crystallization Kinetics and Dielectric Properties of B_2O_3-Nb_2O_5-SrO-BaO Glass-Ceramics

摘要

A series of strontium barium niobate-based B_2O_3 system glass-ceramics have been prepared by conventional melting and heat-treated crystallization method. The effect of BaF_2 addition in nucleation and crystallization kinetics has been explored for dielectric applications. BaF_2 addition decreased the activation energy of crystallization obviously and changed microstructure of glass-ceramics significantly. The dielectric constant and breakdown strength of glass-ceramics were improved significantly by adding BaF_2. The glass-ceramic with a relative dielectric constant of 337 and a breakdown strength of 52.7 kV/mm was achieved.