Thermal stability and thermal conductivity of stacked Cs intercalated layered niobate |
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| Affiliation: | 1. Henan Key Laboratory of High Temperature Functional Ceramics, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450052, China;2. Key Laboratory of Material Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, China;1. Department of Chemistry, CHRIST (Deemed to be University), Bangalore, 560029, India;2. Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box, 2455, Riyadh, 11451, Saudi Arabia;3. Department of Physics, KPR Institute of Engineering and Technology, Coimbatore, 641 407, Tamilnadu, India;4. Department of Chemical and Biochemical Engineering, Dongguk University, Seoul, 04620, Republic of Korea;1. Department of Electronics and Communication Engineering, National Institute of Science and Technology, Berhampur, India;2. Department of Electronics and Telecommunication Engineering, Kalinga Institute of Industrial Technology, Bhubaneswar, India;3. School of Chemistry, University of Glasgow, Glasgow, United Kingdom;4. Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, New York, USA;5. Department of Chemistry, National Institute of Science and Technology, Berhampur, India;6. Department of Biomedical and Environmental Science, National Tsing Hua University, Taiwan, ROC;7. Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan, ROC;8. Department of Materials Science and Engineering and Chemical Engineering, Universidad Carlos III de Madrid, Avenida de la Universidad 30, 28911 Leganés, Madrid, Spain;1. Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea;2. Department of Energy Systems Research, Ajou University, Suwon, 16499, Republic of Korea;3. Department of Materials Science and Engineering, Ajou University, Suwon, 16499, Republic of Korea;4. Department of Materials Science and Engineering, Myongji University, Yongin, 17058, Republic of Korea;5. SKKU Advanced Institute of Nano Technology (SAINT) and Department of Nano Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea;1. College of Materials and Environmental Engineering, Hangzhou Dianzi University, No. 2 Street, Hangzhou, 310018, China;2. School of Science, Hangzhou Dianzi University, Hangzhou, 310018, China;3. Lab for Nanoelectronics and Nano Devices, Department of Electronics Science and Technology, Hangzhou Dianzi University, Hangzhou, 310018, China;4. Functional Materials Research Laboratory, School of Materials Science & Engineering, Tongji University, No. 4800 Caoan Highway, Shanghai, China |
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| Abstract: | Layered materials exhibit competitively low thermal conductivity along the out-of-plane direction. The solution process is a promising method for preparing stacked structures. However, the thermal stability of the layered materials is poor after processing in solution, thus hindering their applications at high temperatures. One of the solutions to improve the thermal stability of layered structures is to expand the interlayer distance by inserting large-size metal ions. In this work, we studied the thermal properties of Cs+ intercalated layered niobate obtained by the ion-exchanged process. The layered structure of the Cs+ intercalated layered niobate survives after thermal treatment even at 1200 °C. The room temperature thermal conductivity of as prepared stacked Cs–HCa2Nb3O10 is as low as 0.11 W m−1 k−1. Upon thermal annealing, the thermal conductivity increases. After annealing at 1200 °C, the value is 0.90 W m−1 k−1. The finding suggests Cs+ intercalated layered niobate is a promising material for high-temperature insulation applications. |
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| Keywords: | Layered oxide Low thermal conductivity High thermal stability Solution process |
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