Optimizing electrocaloric effect of PbSc0.5Ta0.5O3 ceramics near/below room temperature by ordering degree modulation
Lead scandium tantalate (PbSc0.5Ta0.5O3 (PST)) is one of the most promising ferroelectric materials for electrocaloric (EC) refrigeration because of its large enthalpy change (ΔH) at room temperature (RT), whose properties are determined by the ordering arrangement of two kinds of heterovalent ions...
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Tsinghua University Press
2025-06-01
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| Series: | Journal of Advanced Ceramics |
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| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2025.9221088 |
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| author | Ruowei Yin Yuxuan Hou Xiaowei Lv Junjie Li Rongju Zhong Yanjing Su Lijie Qiao Renchao Che Lifeng Zhu Chuanbao Liu Yang Bai |
| author_facet | Ruowei Yin Yuxuan Hou Xiaowei Lv Junjie Li Rongju Zhong Yanjing Su Lijie Qiao Renchao Che Lifeng Zhu Chuanbao Liu Yang Bai |
| author_sort | Ruowei Yin |
| collection | DOAJ |
| description | Lead scandium tantalate (PbSc0.5Ta0.5O3 (PST)) is one of the most promising ferroelectric materials for electrocaloric (EC) refrigeration because of its large enthalpy change (ΔH) at room temperature (RT), whose properties are determined by the ordering arrangement of two kinds of heterovalent ions at B-sites. This work continuously adjusts the ordering degree (Ω) for PST ceramics on a large scale from 0.51 to 1 via multiple heat treatment processes. For the PST sample with Ω = 1, large ΔH = 1.06 J/g and very large EC adiabatic temperature change ΔTmax = 4.26 K@60 kV/cm are obtained because of the highly ordered arrangement of the Sc3+ and Ta5+ ions. With decreasing Ω, the Curie temperature (TC) gradually shifts from RT to below 0 °C, and the phase transition is diffused. A fairly large ΔTmax = 1.57 K is obtained at a rather low temperature of 0 °C in the ceramic with Ω = 0.51. This work proves that lattice ordering is another efficient route to modify ferroelectric features, and the achieved large ΔTmax in a wide temperature range near/below RT facilitates high-performance cooling devices with a cascade design toward the most urgent market needs. |
| format | Article |
| id | doaj-art-65721d72f8764d0dacb0c1dd0dbd4953 |
| institution | DOAJ |
| issn | 2226-4108 2227-8508 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj-art-65721d72f8764d0dacb0c1dd0dbd49532025-08-20T03:16:07ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082025-06-01146922108810.26599/JAC.2025.9221088Optimizing electrocaloric effect of PbSc0.5Ta0.5O3 ceramics near/below room temperature by ordering degree modulationRuowei Yin0Yuxuan Hou1Xiaowei Lv2Junjie Li3Rongju Zhong4Yanjing Su5Lijie Qiao6Renchao Che7Lifeng Zhu8Chuanbao Liu9Yang Bai10Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, ChinaBeijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, ChinaLaboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Fudan University, Shanghai 200438, ChinaSichuan Province Key Laboratory of Information Materials and Devices Application, College of Optoelectronic Engineering, Chengdu University of Information Technology, Chengdu 610225, ChinaBeijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, ChinaBeijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, ChinaBeijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, ChinaLaboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Academy for Engineering & Technology, Fudan University, Shanghai 200438, ChinaSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaBeijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, ChinaBeijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, ChinaLead scandium tantalate (PbSc0.5Ta0.5O3 (PST)) is one of the most promising ferroelectric materials for electrocaloric (EC) refrigeration because of its large enthalpy change (ΔH) at room temperature (RT), whose properties are determined by the ordering arrangement of two kinds of heterovalent ions at B-sites. This work continuously adjusts the ordering degree (Ω) for PST ceramics on a large scale from 0.51 to 1 via multiple heat treatment processes. For the PST sample with Ω = 1, large ΔH = 1.06 J/g and very large EC adiabatic temperature change ΔTmax = 4.26 K@60 kV/cm are obtained because of the highly ordered arrangement of the Sc3+ and Ta5+ ions. With decreasing Ω, the Curie temperature (TC) gradually shifts from RT to below 0 °C, and the phase transition is diffused. A fairly large ΔTmax = 1.57 K is obtained at a rather low temperature of 0 °C in the ceramic with Ω = 0.51. This work proves that lattice ordering is another efficient route to modify ferroelectric features, and the achieved large ΔTmax in a wide temperature range near/below RT facilitates high-performance cooling devices with a cascade design toward the most urgent market needs.https://www.sciopen.com/article/10.26599/JAC.2025.9221088ferroelectricelectrocaloric effect (ece)pbsc0.5ta0.5o3 (pst)ordering degree modulation |
| spellingShingle | Ruowei Yin Yuxuan Hou Xiaowei Lv Junjie Li Rongju Zhong Yanjing Su Lijie Qiao Renchao Che Lifeng Zhu Chuanbao Liu Yang Bai Optimizing electrocaloric effect of PbSc0.5Ta0.5O3 ceramics near/below room temperature by ordering degree modulation Journal of Advanced Ceramics ferroelectric electrocaloric effect (ece) pbsc0.5ta0.5o3 (pst) ordering degree modulation |
| title | Optimizing electrocaloric effect of PbSc0.5Ta0.5O3 ceramics near/below room temperature by ordering degree modulation |
| title_full | Optimizing electrocaloric effect of PbSc0.5Ta0.5O3 ceramics near/below room temperature by ordering degree modulation |
| title_fullStr | Optimizing electrocaloric effect of PbSc0.5Ta0.5O3 ceramics near/below room temperature by ordering degree modulation |
| title_full_unstemmed | Optimizing electrocaloric effect of PbSc0.5Ta0.5O3 ceramics near/below room temperature by ordering degree modulation |
| title_short | Optimizing electrocaloric effect of PbSc0.5Ta0.5O3 ceramics near/below room temperature by ordering degree modulation |
| title_sort | optimizing electrocaloric effect of pbsc0 5ta0 5o3 ceramics near below room temperature by ordering degree modulation |
| topic | ferroelectric electrocaloric effect (ece) pbsc0.5ta0.5o3 (pst) ordering degree modulation |
| url | https://www.sciopen.com/article/10.26599/JAC.2025.9221088 |
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