Environment-friendly Ca2+/Cr3+ co-doping LaAlO3 ceramics with excellent infrared radiation performance for energy-saving
Ca2+/Cr3+ co-doped LaAlO3 infrared (IR) ceramics have been proven to be potential energy-saving materials for high-temperature industries because of their high emissivity and high-temperature stability. However, Cr6+ formation commonly occurs in materials and poses environmental and health risks, su...
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| Language: | English |
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Tsinghua University Press
2025-01-01
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| Series: | Journal of Advanced Ceramics |
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| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2024.9221017 |
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| author | Xinglai Yuan Qinghu Wang Runke Wu Shaobai Sang Yibiao Xu Xiong Liang Liping Pan Bingbing Fan Yawei Li Rui Zhang Jiangtao Li Olena Volkova |
| author_facet | Xinglai Yuan Qinghu Wang Runke Wu Shaobai Sang Yibiao Xu Xiong Liang Liping Pan Bingbing Fan Yawei Li Rui Zhang Jiangtao Li Olena Volkova |
| author_sort | Xinglai Yuan |
| collection | DOAJ |
| description | Ca2+/Cr3+ co-doped LaAlO3 infrared (IR) ceramics have been proven to be potential energy-saving materials for high-temperature industries because of their high emissivity and high-temperature stability. However, Cr6+ formation commonly occurs in materials and poses environmental and health risks, such as Cr6+ dissolution in water and CrO3(g) volatilization. In this study, we combined high emissivity with in situ detoxification by introducing residual Al2O3 into Ca2+/Cr3+ co-doped LaAlO3 ceramics. Compared with the undoped ceramics, the addition of 20 wt% residual Al2O3 resulted in a 78.5% reduction to 18.44 mg/kg (lower than the EU standard of 20 mg/kg) in Cr6+ dissolution and a decrease in 77.8% CrO3(g) volatilization. This significant detoxification effect can be attributed to the formation of CaAl12−xCrxO19. Additionally, as the residual Al2O3 content increased from 5 to 20 wt%, the ceramics maintained high emissivity, above 0.896 in the near-infrared band and 0.781 in the mid-infrared band. Furthermore, the IR coating effectively increased the surface temperature (from 767.1 to 790.7 °C/min) and the heat radiation of the heating source, increasing the heating rate from 31.7 to 34.6 °C/min during water heating. This work offers a promising approach for designing environmentally friendly IR ceramics with excellent IR performance for energy-saving applications in the high-temperature industry. |
| format | Article |
| id | doaj-art-d3dff1d29fd1482594666c2fd8163039 |
| institution | Kabale University |
| issn | 2226-4108 2227-8508 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj-art-d3dff1d29fd1482594666c2fd81630392025-01-24T07:52:15ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082025-01-01141922101710.26599/JAC.2024.9221017Environment-friendly Ca2+/Cr3+ co-doping LaAlO3 ceramics with excellent infrared radiation performance for energy-savingXinglai Yuan0Qinghu Wang1Runke Wu2Shaobai Sang3Yibiao Xu4Xiong Liang5Liping Pan6Bingbing Fan7Yawei Li8Rui Zhang9Jiangtao Li10Olena Volkova11The State Key Laboratory of Refractories and Metallurgy, Joint International Research Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Joint International Research Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Joint International Research Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Joint International Research Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Joint International Research Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Joint International Research Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Joint International Research Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan 430081, ChinaSchool of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, ChinaThe State Key Laboratory of Refractories and Metallurgy, Joint International Research Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan 430081, ChinaSchool of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, ChinaTechnical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Iron and Steel Technology, TU Bergakademie Freiberg, Freiberg 09599, GermanyCa2+/Cr3+ co-doped LaAlO3 infrared (IR) ceramics have been proven to be potential energy-saving materials for high-temperature industries because of their high emissivity and high-temperature stability. However, Cr6+ formation commonly occurs in materials and poses environmental and health risks, such as Cr6+ dissolution in water and CrO3(g) volatilization. In this study, we combined high emissivity with in situ detoxification by introducing residual Al2O3 into Ca2+/Cr3+ co-doped LaAlO3 ceramics. Compared with the undoped ceramics, the addition of 20 wt% residual Al2O3 resulted in a 78.5% reduction to 18.44 mg/kg (lower than the EU standard of 20 mg/kg) in Cr6+ dissolution and a decrease in 77.8% CrO3(g) volatilization. This significant detoxification effect can be attributed to the formation of CaAl12−xCrxO19. Additionally, as the residual Al2O3 content increased from 5 to 20 wt%, the ceramics maintained high emissivity, above 0.896 in the near-infrared band and 0.781 in the mid-infrared band. Furthermore, the IR coating effectively increased the surface temperature (from 767.1 to 790.7 °C/min) and the heat radiation of the heating source, increasing the heating rate from 31.7 to 34.6 °C/min during water heating. This work offers a promising approach for designing environmentally friendly IR ceramics with excellent IR performance for energy-saving applications in the high-temperature industry.https://www.sciopen.com/article/10.26599/JAC.2024.9221017infrared (ir) radiationenergy-savingenvironmentally friendlycr6+ suppressionlaalo3 |
| spellingShingle | Xinglai Yuan Qinghu Wang Runke Wu Shaobai Sang Yibiao Xu Xiong Liang Liping Pan Bingbing Fan Yawei Li Rui Zhang Jiangtao Li Olena Volkova Environment-friendly Ca2+/Cr3+ co-doping LaAlO3 ceramics with excellent infrared radiation performance for energy-saving Journal of Advanced Ceramics infrared (ir) radiation energy-saving environmentally friendly cr6+ suppression laalo3 |
| title | Environment-friendly Ca2+/Cr3+ co-doping LaAlO3 ceramics with excellent infrared radiation performance for energy-saving |
| title_full | Environment-friendly Ca2+/Cr3+ co-doping LaAlO3 ceramics with excellent infrared radiation performance for energy-saving |
| title_fullStr | Environment-friendly Ca2+/Cr3+ co-doping LaAlO3 ceramics with excellent infrared radiation performance for energy-saving |
| title_full_unstemmed | Environment-friendly Ca2+/Cr3+ co-doping LaAlO3 ceramics with excellent infrared radiation performance for energy-saving |
| title_short | Environment-friendly Ca2+/Cr3+ co-doping LaAlO3 ceramics with excellent infrared radiation performance for energy-saving |
| title_sort | environment friendly ca2 cr3 co doping laalo3 ceramics with excellent infrared radiation performance for energy saving |
| topic | infrared (ir) radiation energy-saving environmentally friendly cr6+ suppression laalo3 |
| url | https://www.sciopen.com/article/10.26599/JAC.2024.9221017 |
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