Jie Ren, Qichen Wang, Fuzhou Han, Wenbin Guo, Yi Cao, Songbin Li, Geping Li, Muhammad Ali and Jianan Hu
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引用次数: 0
摘要
考虑到富含锑的次生相颗粒（SPPs）的晶体学特征会极大地影响基于 Bi2Te3 材料的热电性能，因此探索 p 型（Bi, Sb）2Te3 材料中富含锑的次生相颗粒背后的机理具有重要意义。本文采用传统的 TEM 技术来表征火花等离子烧结 p 型 (Bi, Sb)2Te3 合金中富 Sb SPPs 的组成、尺寸和分布。结果表明，富Sb SPPs经常出现两种不同的形态，包括拉长的富Sb SPPs和圆形的富Sb SPPs。结合高分辨率透射电子显微镜，这项研究为（Bi，Sb）2Te3 材料中富硒 SPP 的形成机制提供了原子尺度的证据。
Uncovering the crystallography and formation mechanism of nanoscale clusters in Sb-rich SPPs of a p-type (Bi, Sb)2Te3 alloy†
Considering that the crystallographic characteristics of the Sb-rich secondary phase particles (SPPs) greatly affect the thermoelectric properties of Bi2Te3 based materials, it is of great significance to explore the mechanism behind the Sb-rich SPPs in the p-type (Bi, Sb)2Te3 material. Here a conventional TEM technique was used to characterize the composition, size and distribution of Sb-rich SPPs in a spark plasma sintered p-type (Bi, Sb)2Te3 alloy. The results indicated that two different morphologies of Sb-rich SPPs including elongated and circular Sb-rich SPPs were frequently observed. Combined with high-resolution transmission electron microscopy, this work provides atomic-scale evidence for the formation mechanism behind the Sb-rich SPPs in the (Bi, Sb)2Te3 material.
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions.
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