Thermal and transport properties of U3Si2

JOURNAL OF NUCLEAR MATERIALS

卷:508

Article

Antonio, Daniel J.¹  Shrestha, Keshav¹  Harp, Jason M.¹  Adkins, Cynthia A.¹  Zhang, Yongfeng¹  Carmack, Jon¹  Gofryk, Krzysztof¹ 

[1] Idaho Natl Lab, 2525 Fremont Ave, Idaho Falls, ID 83415 USA

关键词: U3Si2;    Nuclear fuel;    Uranium sesquisilicide;    Thermal conductivity;    Electrical transport;   

DOI  :  10.1016/j.jnucmat.2018.05.036

来源: Elsevier

【 摘 要 】

We have studied U3Si2 by means of the heat capacity, electrical resistivity, Seebeck and Hall effects, and thermal conductivity in the temperature range 2-300 K and in magnetic fields up to 9 T. All the results obtained point to delocalized nature of 5f-electrons in this material. The low temperature heat capacity is enhanced (gamma(el) similar to 150 mJ/mol-K-2) and shows an upturn in C-p/T (T), characteristic of spin fluctuations. The thermal conductivity of U3Si2 is similar to 8.5 W/m-K at room temperature and we show that the electronic part dominates heat transport above 300 K as expected for a metallic system, although the lattice contribution cannot be completely neglected. (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

Free