Effects of Heat Treatment Condition on Properties of Strontium Barium Niobate Based Glass-Ceramic for Energy Storage Capacitors

Abstract:

Strontium barium niobate-based glass-ceramics are prepared by melt-casting followed by controlled crystallization. Results show that Ba_0.25Sr_0.75Nb₂O₆ with tungsten bronze structure forms as the dielectric phases from the glass matrix at 800°C. However, a secondary phase NaSr_1.2Ba_0.8Nb₅O₁₅ occurrs when crystallization temperature exceeds 850°C. The glass-ceramics formed through controlled crystallization exhibit the excellent stability of the temperature and frequency dependence of dielectric properties. The breakdown strength increases with the crystallization temperature. The glass-ceramic material heated at 800°C/3h+950°C/3h shows a breakdown strength of 1400 kV/cm and its energy storage density can reach up to 4.0 J/cm3, which may be strong candidate for high energy density storage capacitors for portable or pulsed power applications.

• Periodical: Advanced Materials Research (Volumes 311-313)
• Pages: 2071-2074
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.311-313.2071
• Online since: August 2011
• Authors: Guo Hua Chen, Wen Jun Zhang
• Keywords: Capacitor, Electrical Properties, Glas Ceramics, Strontium Barium Niobate

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DOI: 10.1109/94.740768