Thermal conductivity and electrical transport properties of double-A-layer MAX phase Mo2Ga2C

被引：46

作者：

Jin, Sen ^{[1
]}

Su, Taichao ^{[1
]}

Hu, Qianku ^{[1
]}

Zhou, Aiguo ^{[1
]}

机构：

[1] Henan Polytech Univ, Sch Mat Sci & Engn, Jiaozuo 454003, Henan, Peoples R China

来源：

MATERIALS RESEARCH LETTERS | 2020年 / 8卷 / 04期

基金：

中国国家自然科学基金;

关键词：

MAX phases; Mo2Ga2C; superconductivity; electrical transport; thermal conductivity; NANOLAMINATED CARBIDE MO2GA2C; MOLYBDENUM CARBIDE; FAMILY; STABILITY; MXENES;

D O I：

10.1080/21663831.2020.1724204

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

IMPACT STATEMENT The present study prepared dense bulk samples of Mo2Ga2C, the first member of double-A-layer MAX phases, and characterized the thermal conductivity and electrical transportation. The results indicated Mo2Ga2C to be a superconductor (T-c = similar to 5.1 K). The present study reports the thermal conductivity and electrical transport properties of Mo2Ga2C, which is the first member of double-A-layer MAX phases. Dense bulk samples of Mo2Ga2C were prepared by vacuum hot pressing. At room temperature, the thermal conductivity was measured to be 14.8 +/- 1.0 W/(m center dot K) and the electrical resistivity was 0.525 +/- 0.052 mu omega center dot m. Mo2Ga2C follows the Wiedemann-Franz law and the Lorenz number is 2.22x10(-8) W omega K-2. Mo2Ga2C is a superconductor with a transition temperature of ca. 5.1 K (+/- 0.1%). The thermal conductivity and electrical resistivity are lower than those of most MAX phases probably due to the extra Ga layer.

引用

页码：158 / 164

页数：7

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