Dielectric and Ferroelectric Properties of SrTiO3-Bi0.5Na0.5TiO3-BaAl0.5Nb0.5O3 Lead-Free Ceramics for High-Energy-Storage Applications

Fei Yan; Haibo Yang; Ying Lin; Tong Wang

doi:10.1021/acs.inorgchem.7b02181

Dielectric and Ferroelectric Properties of SrTiO₃-Bi_0.5Na_0.5TiO₃-BaAl_0.5Nb_0.5O₃ Lead-Free Ceramics for High-Energy-Storage Applications

Inorg Chem. 2017 Nov 6;56(21):13510-13516. doi: 10.1021/acs.inorgchem.7b02181.

Authors

Fei Yan¹, Haibo Yang¹, Ying Lin¹, Tong Wang¹

Affiliation

¹ School of Materials Science and Engineering, Shaanxi University of Science and Technology , Weiyang District, Xi'an 710021 China.

PMID: 29048165
DOI: 10.1021/acs.inorgchem.7b02181

Abstract

Pulsed capacitors require high-recoverable energy-storage density (W_rec) and high energy-storage efficiency (η), which can be realized through the selection and adjustment of the composition. In this work, (1 - x)SrTiO₃-x(0.95Bi_0.5Na_0.5TiO₃-0.05BaAl_0.5Nb_0.5O₃) [(1 - x)ST-x(BNT-BAN)] ceramics were successfully prepared via the pressureless solid-state reaction method. The dielectric constant increases gradually with the introduction of BNT-BAN and obtains a maximum value of 3430 with the composition of 0.4ST-0.6(BNT-BAN) at 100 Hz, which is 10.39 times higher than that of the pure ST sample (∼330). Dispersive relaxor behaviors and ferroelectric performances can be enhanced with the introduction of BNT-BAN. The composition of 0.5ST-0.5(BNT-BAN) exhibits a high W_rec of 1.89 J/cm³ as well as a high η of 77%. Therefore, the (1 - x)ST-x(BNT-BAN) systems are candidate materials for pulsed capacitor applications.