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https://doi.org/10.1016/j.jmat.2020.01.007
Title: | Epsilon-negative BaTiO3/Cu composites with high thermal conductivity and yet low electrical conductivity | Authors: | Wang, Z. Sun, K. Xie, P. Liu, Y. Gu, Q. Fan, R. Wang, J. |
Keywords: | BaTiO3/Cu composite Electrical conductivity Negative permittivity Percolation Thermal conductivity |
Issue Date: | 2020 | Publisher: | Chinese Ceramic Society | Citation: | Wang, Z., Sun, K., Xie, P., Liu, Y., Gu, Q., Fan, R., Wang, J. (2020). Epsilon-negative BaTiO3/Cu composites with high thermal conductivity and yet low electrical conductivity. Journal of Materiomics 6 (1) : 145-151. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jmat.2020.01.007 | Rights: | Attribution-NonCommercial-NoDerivatives 4.0 International | Abstract: | Epsilon-negative materials with high thermal conductivity and low electrical conductivity are of great importance for high power microwave devices. In this work, BaTiO3/Cu composites, as a class of epsilon-negative materials, are rationally designed to achieve a high thermal conductivity yet maintaining the electrical insulative character. Negative permittivity behavior induced by dielectric resonance and plasma oscillation is observed in these BaTiO3/Cu composites, which can be explained by the Lorentz and Drude model respectively. An outstanding absorption ability is achieved near the zero-cross point of the permittivity. Benefiting from the positive temperature coefficient of resistance and the weak temperature dependence of thermal conductivity in BaTiO3/Cu composites, sample containing 22.3 vol% of Cu content exhibits a thermal conductivity of up to 17.7 W/(m·k) and an electrical conductivity down to 0.0022 (? cm)?1 at 150 °C. Therefore, BaTiO3/Cu composite is a promising candidate for applications in electromagnetic attenuation and thermal management. © 2020 The Chinese Ceramic Society | Source Title: | Journal of Materiomics | URI: | https://scholarbank.nus.edu.sg/handle/10635/198012 | ISSN: | 2352-8478 | DOI: | 10.1016/j.jmat.2020.01.007 | Rights: | Attribution-NonCommercial-NoDerivatives 4.0 International |
Appears in Collections: | Elements Staff Publications |
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