Thermal conductivity of high-temperature high-pressure synthesized theta-TaN

Liu, Yizhe1; Li, Qinshu1; Qian, Yijun2; Yang, Yumeng2; Wang, Shanmin3; Li, Wu4; Sun, Bo1,5,6

2023-05-29

10.1063/5.0146492

APPLIED PHYSICS LETTERS   影响因子和分区

0003-6951

1077-3118

Recent first-principles calculation predicted that theta phase tantalum nitride (theta-TaN) single crystal has an ultrahigh thermal conductivity of similar to 1000 W m(-1) K-1 at room temperature, making it one of the best thermal conductors among all materials. Here, we have synthesized theta-TaN by phase change from e-TaN powder at 1750 K and 7.8 GPa. X-ray diffraction patterns and scanning transmission electron microscopy indicate that the as-prepared theta-TaN has a hexagonal tungsten carbide structure with an average grain size of 45 nm. The room-temperature thermal conductivity of theta-TaN was measured to be 47.5 W m(-1) K-1 using time-domain thermoreflectance. Temperature-dependent thermal conductivity suggests that phonon-boundary scattering dominates thermal transport. The thermal conductivity of our sample is higher than those of Si and SiC nanostructures with the same characteristic length. Our result suggests that it is probable to further increase the thermal conductivity of theta-TaN.

SCI ; EI

英语

NI论文

其他

National Natural Science Foundation of China["12004211","52161145502"] ; Shenzhen Science and Technology Program["RCYX20200714114643187","WDZC20200821100123001"] ; Tsinghua Shenzhen International Graduate School["QD2021008N","JC2021008"]

Physics

Physics, Applied

WOS:001010089000008

AIP Publishing

20232314194602

High resolution transmission electron microscopy ; Scanning electron microscopy ; Silicon carbide ; Tantalum compounds ; Thermal conductivity ; Time domain analysis

Thermodynamics:641.1 ; Optical Devices and Systems:741.3 ; Inorganic Compounds:804.2 ; Mathematics:921 ; Crystalline Solids:933.1

PHYSICS

Web of Science

1.Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Shenzhen 518055, Peoples R China
2.ShanghaiTech Univ, Sch Informat Sci & Technol, Shanghai 201210, Peoples R China
3.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
4.Shenzhen Univ, Inst Adv Study, Shenzhen 518060, Peoples R China
5.Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China
6.Guangdong Prov Key Lab Thermal Management Engn & M, Shenzhen 518055, Peoples R China

Liu, Yizhe,Li, Qinshu,Qian, Yijun,et al. Thermal conductivity of high-temperature high-pressure synthesized theta-TaN[J]. APPLIED PHYSICS LETTERS,2023,122(22).

Liu, Yizhe.,Li, Qinshu.,Qian, Yijun.,Yang, Yumeng.,Wang, Shanmin.,...&Sun, Bo.(2023).Thermal conductivity of high-temperature high-pressure synthesized theta-TaN.APPLIED PHYSICS LETTERS,122(22).

Liu, Yizhe,et al."Thermal conductivity of high-temperature high-pressure synthesized theta-TaN".APPLIED PHYSICS LETTERS 122.22(2023).