真空电子技术Issue(1)：21-27,7.DOI:10.16540/j.cnki.cn11-2485/tn.2026.01.03
范德华异质结热电子制冷技术驱动X射线管传热性能强化研究
Enhancing Heat Transfer in X-ray Tube by van der Waals Heterostructures-based Thermionic Emission
摘要
Abstract
Van der Waals(vdW)heterostructures have attracted much attention due to their distinctive optical,electrical,and thermal properties,demonstrating promising potential in areas such as photocatalysis,ultrafast pho-tonics,and free electron radiation devices.Particularly,they are promising platforms for studying thermionic emis-sion.It is illustrated that using vdW heterostructure-based thermionic emission can enhance heat transfer in vacuum devices.As a proof of concept,the approach is demonstrated to offer a promising solution for the long-standing overheating issue in X-ray tubes.Specifically,it is shown that the saturated target temperature of a 2000 W X-ray tube can be reduced from around 1200 ℃ to 490 ℃.Additionally,it is also demonstrated that by reducing the height of the Schottky barrier formed in the vdW heterostructures,the thermionic cooling performance can be en-hanced.The findings pave the way for the development of high-power X-ray tubes.关键词
X射线管/热传递/热电子发射/热电子制冷/范德华异质结Key words
X-ray tube/Heat transfer/Thermionic emission/Thermionic cooling/Van der Waals Hetero-structures分类
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李茜茜,张潮,宫玉彬,黄孙超,陈素果,王玥,时西航,张晓秋艳,胡旻,张平,王少萌..范德华异质结热电子制冷技术驱动X射线管传热性能强化研究[J].真空电子技术,2026,(1):21-27,7.基金项目
This work was supported by National Natural Sci-ence Foundation of China(61921002 and 92163204). （61921002 and 92163204）
