摘要
Polycrystalline BAsx(x=0.80-1.10)compounds with different boron-to-arsenic elemental molar ratios were synthesized by a high-pressure and high-temperature sintering method.Compared with other ambient-pressure synthesis methods,high pressure can significantly promote the reaction speed as well as the reaction yield.As the content of arsenic increases from x=0.91 to 1.10,the thermal conductivity of BAsx gradually increases from 53 to 65 W·m-1·K-1.Furthermore,the temperature dependence of thermal conductivities of these samples reveals an Umklapp scattering due to the increasing phonon population.This work provides a highly efficient method for polycrystalline BAs synthesis.
作者
高磊
刘求林
杨佳伟
吴跃
刘哲宏
覃湜俊
叶旭斌
金士峰
李国栋
赵怀周
龙有文
Lei Gao;Qiulin Liu;Jiawei Yang;Yue Wu;Zhehong Liu;Shijun Qin;Xubin Ye;Shifeng Jin;Guodong Li;Huaizhou Zhao;Youwen Long(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;State Key Laboratory of Heavy Oil Processing,College of New Energy and Materials,China University of Petroleum,Beijing 102249,China;Yangtze River Delta Physics Rearch Center,Liyang 213300,China;Songshan Lake Materials Laboratory,Dongguan 523808,China)
基金
Supported by the National Key R&D Program of China(Grant Nos.2018YFE0103200 and 2018YFA0305700)
the National Natural Science Foundation of China(Grant Nos.51772324,11934017,11921004,and 11574378)
the Chinese Academy of Sciences(Grant Nos.QYZDB–SSW–SLH013 and GJHZ1773)。
