Dielectric Temperature Stability and Enhanced Energy-Storage Performance of Sr<sub>0.4</sub>Ba<sub>0.6</sub>(Zr<sub>0.2</sub>Ti<sub>0.2</sub>Sn<sub>0.2</sub>Ta<sub>0.2</sub>Nb<sub>0.2</sub>)<sub>2</sub>O<sub>6</sub> High-Entropy Ferroelectric Ceramics
In this research, we employed a high-entropy approach in tungsten-bronze-structured ferroelectric ceramics, preparing Sr<sub>0.4</sub>Ba<sub>0.6</sub>(Zr<sub>0.2</sub>Ti<sub>0.2</sub>Sn<sub>0.2</sub>Ta<sub>0.2</sub>Nb<sub>...
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2024-12-01
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| author | Yingying Zhao Ziao Li Shiqiang Yang Pu Mao Ruirui Kang |
| author_facet | Yingying Zhao Ziao Li Shiqiang Yang Pu Mao Ruirui Kang |
| author_sort | Yingying Zhao |
| collection | DOAJ |
| description | In this research, we employed a high-entropy approach in tungsten-bronze-structured ferroelectric ceramics, preparing Sr<sub>0.4</sub>Ba<sub>0.6</sub>(Zr<sub>0.2</sub>Ti<sub>0.2</sub>Sn<sub>0.2</sub>Ta<sub>0.2</sub>Nb<sub>0.2</sub>)<sub>2</sub> (denoted as SBN40-H) ceramics through the traditional solid-state reaction technique. By utilizing the high-entropy approach, the resulting SBN40-H ceramics demonstrated extremely fine grains, averaging 0.58 μm in size. Furthermore, these ceramics possessed a high bandgap of 3.35 eV, which, when combined with the small grain size, contributed to a remarkable breakdown strength of 570.01 kV/cm. The dielectric characteristics demonstrated typical relaxation behavior and outstanding temperature stability, with a capacitance temperature coefficient (TCC) of less than 5% within the temperature range of 111–317 °C. Additionally, the SBN40-H ceramics exhibit slim P–E loops with negligible hysteresis, which is considered to be related to the existence of weakly coupled relaxors. This results in exceptional overall energy-storage properties in the SBN40-H ceramics, exhibiting a notable recoverable energy density (<i>W</i><sub>rec</sub>) of 2.68 J/cm<sup>3</sup> and an efficiency (<i>η</i>) of 93.7% at 390 kV/cm, and finally achieving a remarkable temperature stability in terms of energy-storage performance with variations in <i>W</i><sub>rec</sub> and <i>η</i> being less than 3.5% and 4.4% from 25 to 150 °C. It is worth noting that the high-entropy approach is highly effective in reducing grain size, increasing the breakdown field strength and enhancing the dielectric temperature stability of tungsten-bronze-structured ferroelectric ceramics. |
| format | Article |
| id | doaj-art-bc937d063f4e4d3f8912fed2c22fb486 |
| institution | Kabale University |
| issn | 2073-4352 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Crystals |
| spelling | doaj-art-bc937d063f4e4d3f8912fed2c22fb4862025-01-24T13:28:03ZengMDPI AGCrystals2073-43522024-12-011512610.3390/cryst15010026Dielectric Temperature Stability and Enhanced Energy-Storage Performance of Sr<sub>0.4</sub>Ba<sub>0.6</sub>(Zr<sub>0.2</sub>Ti<sub>0.2</sub>Sn<sub>0.2</sub>Ta<sub>0.2</sub>Nb<sub>0.2</sub>)<sub>2</sub>O<sub>6</sub> High-Entropy Ferroelectric CeramicsYingying Zhao0Ziao Li1Shiqiang Yang2Pu Mao3Ruirui Kang4College of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaCollege of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaCollege of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaJiangxi Key Laboratory of Extreme Manufacturing Technology for High-End Equipment, School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330603, ChinaState Key Laboratory for Mechanical Behavior of Materials, Frontier Institute of Science and Technology, Future Industrial Innovation Institute of Emerging Information Storage and Smart Sensor, Xi’an Jiaotong University, Xi’an 710049, ChinaIn this research, we employed a high-entropy approach in tungsten-bronze-structured ferroelectric ceramics, preparing Sr<sub>0.4</sub>Ba<sub>0.6</sub>(Zr<sub>0.2</sub>Ti<sub>0.2</sub>Sn<sub>0.2</sub>Ta<sub>0.2</sub>Nb<sub>0.2</sub>)<sub>2</sub> (denoted as SBN40-H) ceramics through the traditional solid-state reaction technique. By utilizing the high-entropy approach, the resulting SBN40-H ceramics demonstrated extremely fine grains, averaging 0.58 μm in size. Furthermore, these ceramics possessed a high bandgap of 3.35 eV, which, when combined with the small grain size, contributed to a remarkable breakdown strength of 570.01 kV/cm. The dielectric characteristics demonstrated typical relaxation behavior and outstanding temperature stability, with a capacitance temperature coefficient (TCC) of less than 5% within the temperature range of 111–317 °C. Additionally, the SBN40-H ceramics exhibit slim P–E loops with negligible hysteresis, which is considered to be related to the existence of weakly coupled relaxors. This results in exceptional overall energy-storage properties in the SBN40-H ceramics, exhibiting a notable recoverable energy density (<i>W</i><sub>rec</sub>) of 2.68 J/cm<sup>3</sup> and an efficiency (<i>η</i>) of 93.7% at 390 kV/cm, and finally achieving a remarkable temperature stability in terms of energy-storage performance with variations in <i>W</i><sub>rec</sub> and <i>η</i> being less than 3.5% and 4.4% from 25 to 150 °C. It is worth noting that the high-entropy approach is highly effective in reducing grain size, increasing the breakdown field strength and enhancing the dielectric temperature stability of tungsten-bronze-structured ferroelectric ceramics.https://www.mdpi.com/2073-4352/15/1/26high entropystrontium barium niobatedielectric temperature stabilityenergy-storage performance |
| spellingShingle | Yingying Zhao Ziao Li Shiqiang Yang Pu Mao Ruirui Kang Dielectric Temperature Stability and Enhanced Energy-Storage Performance of Sr<sub>0.4</sub>Ba<sub>0.6</sub>(Zr<sub>0.2</sub>Ti<sub>0.2</sub>Sn<sub>0.2</sub>Ta<sub>0.2</sub>Nb<sub>0.2</sub>)<sub>2</sub>O<sub>6</sub> High-Entropy Ferroelectric Ceramics Crystals high entropy strontium barium niobate dielectric temperature stability energy-storage performance |
| title | Dielectric Temperature Stability and Enhanced Energy-Storage Performance of Sr<sub>0.4</sub>Ba<sub>0.6</sub>(Zr<sub>0.2</sub>Ti<sub>0.2</sub>Sn<sub>0.2</sub>Ta<sub>0.2</sub>Nb<sub>0.2</sub>)<sub>2</sub>O<sub>6</sub> High-Entropy Ferroelectric Ceramics |
| title_full | Dielectric Temperature Stability and Enhanced Energy-Storage Performance of Sr<sub>0.4</sub>Ba<sub>0.6</sub>(Zr<sub>0.2</sub>Ti<sub>0.2</sub>Sn<sub>0.2</sub>Ta<sub>0.2</sub>Nb<sub>0.2</sub>)<sub>2</sub>O<sub>6</sub> High-Entropy Ferroelectric Ceramics |
| title_fullStr | Dielectric Temperature Stability and Enhanced Energy-Storage Performance of Sr<sub>0.4</sub>Ba<sub>0.6</sub>(Zr<sub>0.2</sub>Ti<sub>0.2</sub>Sn<sub>0.2</sub>Ta<sub>0.2</sub>Nb<sub>0.2</sub>)<sub>2</sub>O<sub>6</sub> High-Entropy Ferroelectric Ceramics |
| title_full_unstemmed | Dielectric Temperature Stability and Enhanced Energy-Storage Performance of Sr<sub>0.4</sub>Ba<sub>0.6</sub>(Zr<sub>0.2</sub>Ti<sub>0.2</sub>Sn<sub>0.2</sub>Ta<sub>0.2</sub>Nb<sub>0.2</sub>)<sub>2</sub>O<sub>6</sub> High-Entropy Ferroelectric Ceramics |
| title_short | Dielectric Temperature Stability and Enhanced Energy-Storage Performance of Sr<sub>0.4</sub>Ba<sub>0.6</sub>(Zr<sub>0.2</sub>Ti<sub>0.2</sub>Sn<sub>0.2</sub>Ta<sub>0.2</sub>Nb<sub>0.2</sub>)<sub>2</sub>O<sub>6</sub> High-Entropy Ferroelectric Ceramics |
| title_sort | dielectric temperature stability and enhanced energy storage performance of sr sub 0 4 sub ba sub 0 6 sub zr sub 0 2 sub ti sub 0 2 sub sn sub 0 2 sub ta sub 0 2 sub nb sub 0 2 sub sub 2 sub o sub 6 sub high entropy ferroelectric ceramics |
| topic | high entropy strontium barium niobate dielectric temperature stability energy-storage performance |
| url | https://www.mdpi.com/2073-4352/15/1/26 |
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