Dielectric ceramics with high polarization and low sintering temperature are important for high-performance and low-cost multilayer ceramic capacitors (MLCCs). Herein, BiFeO3 was added to a lead-free composition 0.48BaTiO3-0.4Bi(Mg0.5Hf0.5)O3-0.12SrTiO3 to lower the sintering temperature and increase the polarization simultaneously. As a result, a low sintering temperature of 950 °C and high comprehensive energy storage properties with a recoverable energy density Wrec of 5.7 J/cm3 and an energy efficiency η of 92% at 450 kV/cm were achieved. Together with the good temperature stability and cycling stability of Wrec and η, the ceramics exhibit great potential in the energy storage MLCCs with low-cost Ag-Pd electrodes with a high Ag content.
Bismuth ferrite-modified lead-free ceramics with reduced sintering temperature and improved energy storage properties
Xi Kong, Letao Yang, Zixi Luo, Yiqian Liu, Shun Lan, Bingbing Yang, Fanqi Meng, Weibin Ren, Xinyue Zhang, Jinghan Cai, Yuan-Hua Lin, Jinming Guo, Ce-Wen Nan; Bismuth ferrite-modified lead-free ceramics with reduced sintering temperature and improved energy storage properties. Appl. Phys. Lett. 1 May 2023; 122 (18): 182904. https://doi.org/10.1063/5.0145299
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