Npj Comput. Mater.:神奇的精准控温材料—谁把热量带走了
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随着电池和计算机芯片朝着更高密度、更高功率的方向发展,更复杂的温度管理与控温材料变得越来越重要。主动佩尔捷制冷材料可以通过消耗电能来加速传热,在集成电路芯片冷却、锂离子电池、微恒温仪、医疗温度控制等方面有着广泛的应用。然而,佩尔捷效应是利用高的功率因子来驱动电能加速传热,而大部分高功率因子材料的使用温度都在中高温阶段,无法满足室温条件下快速导热的需求。
Active Peltier cooling enables Peltier heat transfer in addition to the traditional Fourier thermal conductance, which is useful in some special applications, such as the microthermostats. From the material wise, however, the study on the active Peltier cooling materials is rare. We carried out a high-throughput workflow to screen out 5 room-temperature active Peltier cooling materials, GaSbLi2, HgPbCa2, SnTiRu2, GeYbLi2, and GeTiFe2, from 2,958 Heusler materials. All the five materials are semimetals or very narrow band gap systems with high electrical conductivity. Some of these materials have relatively large Seebeck coefficients due to the band asymmetry. Their effective thermal conductivity effs, which are the summation of active Peltier thermal conductivity and passive thermal conductivity, are all greater than Cu at the room temperature and ΔT = 1 K. The present work gives a possible way to search active cooling Peltier materials for the applications of precise temperature control.
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