Tailored thermal expansion and electrical properties of α-Cu2V2O7/Al |
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| Affiliation: | 1. Key Laboratory of Materials Physics of Ministry of Education, School of Physical Science and Engineering, Zhengzhou University, Zhengzhou 450052, China;2. College of Science, Zhongyuan University of Technology, Zhengzhou 450007, China;3. Key Laboratory of Photovoltaic Materials of Henan Province, School of Physics and Electronics, Henan University, Kaifeng 475004, China;1. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610000, China;2. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China;1. Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam;2. Faculty of Environmental Sciences, University of Science, Vietnam National University, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam;3. VNU Key Laboratory of Advanced Materials for Green Growth, University of Science, Vietnam National University, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam;4. Faculty of Chemistry, University of Science, Vietnam National University, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam;1. Center for Condensed Matter and Materials Physics, Department of Physics, Beihang University, Beijing 100191, People’s Republic of China;2. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, School of Renewable Energy, North China Electric Power University, Beijing 102206, People’s Republic of China;1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;2. Department of Materials Science and Engineering, University of Michigan, USA |
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| Abstract: | α-Cu2V2O7/Al composites (with 5–80 wt% of Al) were prepared by a solid state method. Their structural stability, thermal expansion, hardness and electrical properties were studied in detail. The coefficient of thermal expansion (CTE) and hardness of α-Cu2V2O7/Al composites sample can be tailored with the content of Al. The CTE is only 0.49×10?6 K?1 (RT–780 K) when the Al content is 10 wt%, which is near-zero thermal expansion. The electrical conductivity of α-Cu2V2O7/Al composites increases with increasing the content of Al. When the content of Al is larger than 40 wt%, the α-Cu2V2O7/Al composites exhibit excellent electrical conductivity, which can be mainly attributed to the conductive percolation phenomena of Al in the α-Cu2V2O7/Al composites. |
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| Keywords: | Thermal expansion Hardness Electrical conductivity |
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