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WANG, X., FAN, Y., ZHANG, Bin, MOSTAED, A., LI, L., FETEIRA, Antonio, WANG, D., SINCLAIR, D.C., WANG, G. and REANEY, I.M. (2022). High discharge energy density in novel K1/2Bi1/2TiO3-BiFeO3 based relaxor ferroelectrics. Journal of the European Ceramic Society, 42 (15), 7381-7387.
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Abstract
An increasing number of new dielectrics are being reported for the development of next-generation ceramic capacitors for power electronics used in clean energy technologies. Here, high discharge energy density (Wdis) ~6.1 J cm−3 with efficiency (η)~72% under a pulsed field (Emax) of 410 kV cm−1 is reported along with temperature stability up to 150 °C (Emax = 200 kV cm−1) for 0.5 K0.5Bi0.5TiO3-0.42BiFeO3-0.08Sm(Mg2/3Nb1/3)O3 (KBT-BF-SMN) bulk ceramics. The optimised composition is chemically heterogeneous but electrically homogenous, similar to several BiFeO3-based dielectrics reported previously and adding to the growing body of evidence that electrical (measured at weak-field) not chemical homogeneity is the best guide to increased Emax and enhanced energy density. KBT-BF-SMN ceramics are therefore considered as promising candidates for pulsed power and power electronics applications.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 0912 Materials Engineering; Materials |
| Identification Number: | https://doi.org/10.1016/j.jeurceramsoc.2022.08.020 |
| Page Range: | 7381-7387 |
| SWORD Depositor: | Symplectic Elements |
| Depositing User: | Symplectic Elements |
| Date Deposited: | 21 Sep 2022 12:02 |
| Last Modified: | 12 Oct 2023 10:15 |
| URI: | https://shura.shu.ac.uk/id/eprint/30725 |
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