Fine-grained and electrically conductive NdB6/SiO2: A promising electromagnetic interference shielding material with good thermal and mechanical properties |
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| Authors: | Weiming Zhang Biao Zhao Huimin Xiang Fu-Zhi Dai Jingxing Yang Xiaohui Wang Yan Xing Kuang Sun Yanchun Zhou |
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| Affiliation: | 1. Science and Technology on Advanced Functional Composite Laboratory, Aerospace Research Institute of Materials & Processing Technology, Beijing, 100076, China;2. Henan Key Laboratory of Aeronautical Materials and Application Technology, School of Material Science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou, 450046, China;3. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Science, Shenyang, 110016, China;4. New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing University of Posts and Telecommunications, Nanjing, 210023, China;5. Shanghai Chenhua Science and Technology Corporation Ltd., Shanghai, 201804, China |
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| Abstract: | ![]()
Searching for thermal conductive materials with high electromagnetic interference (EMI) shielding effectiveness (SE) is the key to protect electronic equipment against electromagnetic pollution and excess heat emission. Herein, NdB6/SiO2 bulks with high EMI SE and thermal conductivity which also exhibit good mechanical properties were prepared by liquid phase sintering (LPS). The NdB6/SiO2 bulk prepared by LPS at 1550 °C has fine grain-size, which is beneficial to improving mechanical property and EMI shielding performance. It exhibits high conductivity of 1.47 × 104 S/cm, high EMI SE of 55.1 dB in K band, and high thermal conductivity of 37.9 W/m K. It also possesses flexural strength of 266 MPa and Vickers hardness of 14.8 GPa. Thus, NdB6/SiO2 composite ceramics are promising candidates for EMI shielding with good heat dissipation and mechanical load-bearing capabilities. |
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| Keywords: | Neodymium hexaboride Liquid phase sintering Thermal properties Mechanical properties Electromagnetic interference shielding |
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