期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 169, 期 -, 页码 47-54出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2015.11.026
关键词
Nanostructures; Thermal properties; Differential scanning calorimetry (DSC); Optical properties
资金
- Brazilian agency CNPq
- Brazilian agency CAPES
A nanostructured SnSe2 phase was successfully produced by mechanical alloying. The influence of defect centers on the structural, optical and photoacoustic properties of the alloy was investigated by annealing the as-milled SnSe2 powder. From optical absorbance and photoacoustic absorption measurements, the energy band gap, E-g, and the thermal diffusivity, alpha, values were determined for as-milled and annealed samples. The thermal conductivity values for the as-milled and annealed samples were estimated by using the alpha values obtained from the photoacoustic measurements, the density values obtained from the Rietveld refinement of the X-ray diffraction patterns and the specific heat value for the bulk SnSe2 phase. These values were used to estimate the dimensionless figure of merit ZT. It was evidenced that the ZT parameter of the as-milled nanostructured SnSe2 sample is almost twice larger than the ZT of the annealed sample. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据