Energy-storage properties of low-temperature Co-fired BNT-ST/AgPd multilayer lead-free ceramic capacitors
A lead-free 0.6Bi0.5Na0.5TiO3-0.4SrTiO3 ceramic doped with Nb2O5, CuO and MnO2 additives (BNSr0.4TNbxCu0.8Mn0.15) was synthesized at a relatively low firing temperature of 1050 °C. Using this composition, multilayer ceramic capacitors with AgPd inner electrodes were successfully prepared by a tape-c...
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Published in | Journal of alloys and compounds Vol. 827; p. 154260 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Lausanne
Elsevier B.V
25.06.2020
Elsevier BV |
Subjects | |
Online Access | Get full text |
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Summary: | A lead-free 0.6Bi0.5Na0.5TiO3-0.4SrTiO3 ceramic doped with Nb2O5, CuO and MnO2 additives (BNSr0.4TNbxCu0.8Mn0.15) was synthesized at a relatively low firing temperature of 1050 °C. Using this composition, multilayer ceramic capacitors with AgPd inner electrodes were successfully prepared by a tape-casting method for energy storage applications. Due to the high polarization Pmax and low hysteresis, the largest recoverable energy storage density Wrec value of 1.9 J/cc and high efficiency η of 89% were obtained in the BNSr0.4TNb2.5Cu0.8Mn0.15 composition under a low electric field of 170 kV/cm. The multilayer BNSr0.4TNb2.5Cu0.8Mn0.15/Ag75Pd25 capacitors contain 30 active layers, in which the thickness of a single ceramic layer was approximately 27 μm. Under a low electric field of 270 kV/cm, excellent energy storage performance was observed in multilayer capacitors, with a Wrec of 2.83 J/cc and η of 85%. The capacitors demonstrate the temperature insensitive properties that the variation in Wrec was less than 5% between 25 °C and 100 °C. These results indicate that this ceramic capacitor is a promising candidate for lead-free energy storage applications.
•Multilayer lead-free ceramic capacitors fabricated at low sintering temperature (1050 °C).•BNT co-fired with low-cost Ag75Pd25 inner electrodes.•Excellent energy storage performance under a low electric field.•Thermally-insensitive energy-storage performance. |
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ISSN: | 0925-8388 1873-4669 |
DOI: | 10.1016/j.jallcom.2020.154260 |