| Affiliation: | 1. School of Physics and Materials Science, Guangzhou University, Guangzhou, P. R. China Institute of Semiconductors, Guangdong Academy of Sciences, Guangzhou, P. R. China;2. Institute of Semiconductors, Guangdong Academy of Sciences, Guangzhou, P. R. China;3. School of Molecular Sciences and Center for Materials of Universe, Arizona State University, Tempe, Arizona, USA;4. Jewelry Institute, Guangzhou Panyu Polytechnic, Guangzhou, P. R. China;5. Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources, College of Materials Science and Engineering, Guilin University of Technology, Guilin, P. R. China;6. Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, P. R. China;7. School of Physics and Materials Science, Guangzhou University, Guangzhou, P. R. China |
| Abstract: | Dielectric ceramics with both excellent energy storage and optical transmittance have attracted much attention in recent years. However, the transparent Pb-free energy-storage ceramics were rare reported. In this work, we prepared transparent relaxor ferroelectric ceramics (1 − x)Bi0.5Na0.5TiO3–xNaNbO3 (BNT–xNN) by conventional solid-state reaction method. We find the NN-doping can enhance the polarization and breakdown strength of BNT by suppressing the grain growth and restrained the reduction of Ti4+ to Ti3+. As a result, a high recoverable energy-storage density of 5.14 J/cm3 and its energy efficiency of 79.65% are achieved in BNT–0.5NN ceramic at 286 kV/cm. Furthermore, NN-doping can promote the densification to improve the optical transmittance of BNT, rising from ∼26% (x = 0.2) to ∼32% (x = 0.5) in the visible light region. These characteristics demonstrate the potential application of BNT–xNN as transparent energy-storage dielectric ceramics. |
