Thermocrystal is a new type of artificial periodic crystal structure, which reduces the thermal conductivity of materials. The main factor affecting the thermal conductivity of thermocrystals is the coverage area between the bandgap frequency range and the thermal spectrum. In this paper, we found that, compared with the circular air hole, the elliptical air hole can significantly improve the thermal bandgap of thermocrystal, which will effectively reduce the thermal conductivity. Among them, the cross-shaped ellipse air hole can widen the thermal bandgap of thermocrystal to more than twice. This improves the efficiency of heat transfer by 62%.

中文翻译：

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通过剪裁气孔扩大热晶体的带隙

热晶是一种新型的人工周期晶体结构，它降低了材料的导热系数。影响热晶体热导率的主要因素是带隙频率范围和热谱之间的覆盖区域。在本文中，我们发现，与圆形气孔相比，椭圆形气孔可以显着提高热晶体的热带隙，从而有效降低热导率。其中，十字形椭圆气孔可以将热晶的热带隙扩大两倍以上。这将传热效率提高了 62%。