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
Lei Gao
Qiulin Liu
Jiawei Yang
Yue Wu
Zhehong Liu
Shijun Qin
Xubin Ye
Shifeng Jin
Guodong Li
Huaizhou Zhao
Youwen Long
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(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)。
