Large enhancement of the electrocaloric effect in PLZT ceramics prepared by hot-pressing
In this contribution, we demonstrate the optimization of the microstructures of the Pb0.85La0.1(Zr0.65Ti0.35)O3 (PLZT) relaxor ferroelectric ceramics and subsequent enhancements in their polarization and electrical resistivity by using a hot-pressing process. The resulting superior breakdown strengt...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2016-06-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/1.4950844 |
| _version_ | 1818028068928749568 |
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| author | Guangzu Zhang Zhibiao Chen Baoyan Fan Jianguo Liu Mo Chen Meng Shen Pin Liu Yike Zeng Shenglin Jiang Qing Wang |
| author_facet | Guangzu Zhang Zhibiao Chen Baoyan Fan Jianguo Liu Mo Chen Meng Shen Pin Liu Yike Zeng Shenglin Jiang Qing Wang |
| author_sort | Guangzu Zhang |
| collection | DOAJ |
| description | In this contribution, we demonstrate the optimization of the microstructures of the Pb0.85La0.1(Zr0.65Ti0.35)O3 (PLZT) relaxor ferroelectric ceramics and subsequent enhancements in their polarization and electrical resistivity by using a hot-pressing process. The resulting superior breakdown strength of hot-pressed PLZT enables the application of high electric field to induce a giant electrocaloric effect, in which the adiabatic change of temperature (ΔT) and the isothermal change of entropy (ΔS) are around 2 times greater than those of the samples prepared by the conventional sintering approach using muffle furnace. Moreover, the addition of extra PbO to make up the loss of Pb in the high-temperature sintering leads to the further improvements in the phase composition and electrical properties of PLZT, due to inhibition of the pyrochlore phase formation. The relationship among the sintering conditions, the content of excess PbO, and the microstructure as well as the electrical characteristics of PLZT have been investigated in a systematic manner. This work provides a facile approach to enhanced electrocaloric effect in bulk ceramics. |
| first_indexed | 2024-12-10T04:57:55Z |
| format | Article |
| id | doaj.art-26bf2fe146544ea2b5f8bdeaa7fd8889 |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-12-10T04:57:55Z |
| publishDate | 2016-06-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj.art-26bf2fe146544ea2b5f8bdeaa7fd88892022-12-22T02:01:28ZengAIP Publishing LLCAPL Materials2166-532X2016-06-0146064103064103-610.1063/1.4950844006694APMLarge enhancement of the electrocaloric effect in PLZT ceramics prepared by hot-pressingGuangzu Zhang0Zhibiao Chen1Baoyan Fan2Jianguo Liu3Mo Chen4Meng Shen5Pin Liu6Yike Zeng7Shenglin Jiang8Qing Wang9Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USASchool of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei 430074, ChinaDepartment of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USAWuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, ChinaSchool of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei 430074, ChinaSchool of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei 430074, ChinaSchool of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei 430074, ChinaSchool of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei 430074, ChinaSchool of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei 430074, ChinaDepartment of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USAIn this contribution, we demonstrate the optimization of the microstructures of the Pb0.85La0.1(Zr0.65Ti0.35)O3 (PLZT) relaxor ferroelectric ceramics and subsequent enhancements in their polarization and electrical resistivity by using a hot-pressing process. The resulting superior breakdown strength of hot-pressed PLZT enables the application of high electric field to induce a giant electrocaloric effect, in which the adiabatic change of temperature (ΔT) and the isothermal change of entropy (ΔS) are around 2 times greater than those of the samples prepared by the conventional sintering approach using muffle furnace. Moreover, the addition of extra PbO to make up the loss of Pb in the high-temperature sintering leads to the further improvements in the phase composition and electrical properties of PLZT, due to inhibition of the pyrochlore phase formation. The relationship among the sintering conditions, the content of excess PbO, and the microstructure as well as the electrical characteristics of PLZT have been investigated in a systematic manner. This work provides a facile approach to enhanced electrocaloric effect in bulk ceramics.http://dx.doi.org/10.1063/1.4950844 |
| spellingShingle | Guangzu Zhang Zhibiao Chen Baoyan Fan Jianguo Liu Mo Chen Meng Shen Pin Liu Yike Zeng Shenglin Jiang Qing Wang Large enhancement of the electrocaloric effect in PLZT ceramics prepared by hot-pressing APL Materials |
| title | Large enhancement of the electrocaloric effect in PLZT ceramics prepared by hot-pressing |
| title_full | Large enhancement of the electrocaloric effect in PLZT ceramics prepared by hot-pressing |
| title_fullStr | Large enhancement of the electrocaloric effect in PLZT ceramics prepared by hot-pressing |
| title_full_unstemmed | Large enhancement of the electrocaloric effect in PLZT ceramics prepared by hot-pressing |
| title_short | Large enhancement of the electrocaloric effect in PLZT ceramics prepared by hot-pressing |
| title_sort | large enhancement of the electrocaloric effect in plzt ceramics prepared by hot pressing |
| url | http://dx.doi.org/10.1063/1.4950844 |
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