Large-diameter ceramic room-temperature flash sintering technology based on new carbon electrodes
Room-temperature flash sintering (FS) for ceramics is a highly efficient and energy-saving new ceramic sintering technique. Addressing the current challenges in room-temperature flash sintering research, such as small product sizes, shape limitations, and high power requirements, limits their real a...
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| Format: | Article |
| Language: | English |
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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.2025.9221094 |
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| author | Zhuo Liu Zhixing He Zongjian Li She Chen Li Cheng Xinhao Zhao Xuetong Zhao Guilai Yin Nianping Yan Jinling Liu Xilin Wang Zhidong Jia |
| author_facet | Zhuo Liu Zhixing He Zongjian Li She Chen Li Cheng Xinhao Zhao Xuetong Zhao Guilai Yin Nianping Yan Jinling Liu Xilin Wang Zhidong Jia |
| author_sort | Zhuo Liu |
| collection | DOAJ |
| description | Room-temperature flash sintering (FS) for ceramics is a highly efficient and energy-saving new ceramic sintering technique. Addressing the current challenges in room-temperature flash sintering research, such as small product sizes, shape limitations, and high power requirements, limits their real application in the FS industry. In particular, for dog bone shape and small size, which are usually smaller than 10 mm, no records of sizes larger than 20 mm have been reported. In this study, a novel flash sintering device based on a composite layered carbon electrode structure was developed to conduct large-diameter sample flash sintering at room temperature (RT) in an air atmosphere under a direct current (DC) voltage below 100 V. Specifically, room-temperature flash sintering was achieved for ZnO ceramic disks with diameters of 40.0 mm and thicknesses of 1.80 mm, achieving a maximum relative density of 96.02%. Furthermore, room-temperature flash sintering was achieved for ZnO varistor ceramic disks with a diameter of 40.0 mm and a thickness of 1.93 mm, reaching a maximum relative density of 99.27%, a maximum voltage gradient of 330.5 V·mm−1, and the highest nonlinearity coefficient (α) of 23.0. Room-temperature flash sintering was also achieved for 3 mol% yttrium-doped zirconia (3YSZ) ceramic disks, achieving a maximum relative density of 98.48%. The proposed flash sintering device and corresponding process demonstrate broad applicability for the ceramics industry. |
| format | Article |
| id | doaj-art-e28cca9be9db4c4aae618413db5dcd68 |
| institution | Kabale University |
| 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-e28cca9be9db4c4aae618413db5dcd682025-08-20T03:29:06ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082025-06-01146922109410.26599/JAC.2025.9221094Large-diameter ceramic room-temperature flash sintering technology based on new carbon electrodesZhuo Liu0Zhixing He1Zongjian Li2She Chen3Li Cheng4Xinhao Zhao5Xuetong Zhao6Guilai Yin7Nianping Yan8Jinling Liu9Xilin Wang10Zhidong Jia11Engineering Laboratory of Power Equipment Reliability in Complicated Coastal Environments, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, ChinaState Key Laboratory of High-Efficiency and High-Quality Conversion for Electric Power, College of Electrical and Information Engineering, Hunan University, Changsha 410082, ChinaState Key Laboratory of High-Efficiency and High-Quality Conversion for Electric Power, College of Electrical and Information Engineering, Hunan University, Changsha 410082, ChinaState Key Laboratory of High-Efficiency and High-Quality Conversion for Electric Power, College of Electrical and Information Engineering, Hunan University, Changsha 410082, ChinaState Key Laboratory of Power Transmission Equipment Technology, Chongqing University, Chongqing 400044, ChinaState Grid Jiangsu Electric Power Co., Ltd. Wuxi Power Supply Branch, Wuxi 214125, ChinaState Key Laboratory of Power Transmission Equipment Technology, Chongqing University, Chongqing 400044, ChinaElectric Power Science Research Institute, State Grid Jiangxi Electric Power Co., Ltd., Nanchang 330096, ChinaElectric Power Science Research Institute, State Grid Jiangxi Electric Power Co., Ltd., Nanchang 330096, ChinaSchool of Mechanics and Aerospace Engineering, Southwest Jiaotong University, Chengdu 611756, ChinaEngineering Laboratory of Power Equipment Reliability in Complicated Coastal Environments, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, ChinaEngineering Laboratory of Power Equipment Reliability in Complicated Coastal Environments, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, ChinaRoom-temperature flash sintering (FS) for ceramics is a highly efficient and energy-saving new ceramic sintering technique. Addressing the current challenges in room-temperature flash sintering research, such as small product sizes, shape limitations, and high power requirements, limits their real application in the FS industry. In particular, for dog bone shape and small size, which are usually smaller than 10 mm, no records of sizes larger than 20 mm have been reported. In this study, a novel flash sintering device based on a composite layered carbon electrode structure was developed to conduct large-diameter sample flash sintering at room temperature (RT) in an air atmosphere under a direct current (DC) voltage below 100 V. Specifically, room-temperature flash sintering was achieved for ZnO ceramic disks with diameters of 40.0 mm and thicknesses of 1.80 mm, achieving a maximum relative density of 96.02%. Furthermore, room-temperature flash sintering was achieved for ZnO varistor ceramic disks with a diameter of 40.0 mm and a thickness of 1.93 mm, reaching a maximum relative density of 99.27%, a maximum voltage gradient of 330.5 V·mm−1, and the highest nonlinearity coefficient (α) of 23.0. Room-temperature flash sintering was also achieved for 3 mol% yttrium-doped zirconia (3YSZ) ceramic disks, achieving a maximum relative density of 98.48%. The proposed flash sintering device and corresponding process demonstrate broad applicability for the ceramics industry.https://www.sciopen.com/article/10.26599/JAC.2025.9221094flash sintering (fs)electrodesznoyttrium-doped zirconia (ysz) |
| spellingShingle | Zhuo Liu Zhixing He Zongjian Li She Chen Li Cheng Xinhao Zhao Xuetong Zhao Guilai Yin Nianping Yan Jinling Liu Xilin Wang Zhidong Jia Large-diameter ceramic room-temperature flash sintering technology based on new carbon electrodes Journal of Advanced Ceramics flash sintering (fs) electrodes zno yttrium-doped zirconia (ysz) |
| title | Large-diameter ceramic room-temperature flash sintering technology based on new carbon electrodes |
| title_full | Large-diameter ceramic room-temperature flash sintering technology based on new carbon electrodes |
| title_fullStr | Large-diameter ceramic room-temperature flash sintering technology based on new carbon electrodes |
| title_full_unstemmed | Large-diameter ceramic room-temperature flash sintering technology based on new carbon electrodes |
| title_short | Large-diameter ceramic room-temperature flash sintering technology based on new carbon electrodes |
| title_sort | large diameter ceramic room temperature flash sintering technology based on new carbon electrodes |
| topic | flash sintering (fs) electrodes zno yttrium-doped zirconia (ysz) |
| url | https://www.sciopen.com/article/10.26599/JAC.2025.9221094 |
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