Gd_2O_3 Added Glass-Ceramic Composite for the Improvement of Energy Storage Density Through Controlled Crystallization

摘要

Crystallization of a glass containing high dielectric performance components can be controlled in the nucleation and growth processes in order to meet the requirements of enabling the glass-ceramic dielectric composites to obtain the desired high electric energy storage densitiy. In this paper, the controlled crystallization technique was employed to synthesize glass-ceramic composites with addition of Gd_2O_3 in BaO-Na_2O-Nb_2O_5-SiO_2 glass system. The results show that both the dielectric constant and the breakdown strength of the glass-ceramic composites demonstrate an increasing tendency with the addition of Gd_2O_3 from 0 mol% to 7 mol% (relative to SiO_2), being responsible for remarkable improvement of the energy storage density of the glass-ceramic composites from 1.7 J/cm~3 to 4.7 J/cm~3.