在新型Cu-S修改ZrS2化合物中具有内在低导热性,具有不对称的结合
Zhi Li1,2, Zhengyang Zhou1,3, Jiawei Zhang1
1State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China.
Small (Weinheim an der Bergstrasse, Germany)
|August 25, 2023
概括
研究人员发现了Cu2ZrS3,一种具有非常低导热率的新型三元硫化物. 这种材料的材料.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 无机化学 无机化学 有机化学
背景情况:
- 低导热率材料对于隔热,隔热屏障涂层和热电应用至关重要.
- 了解声子传输,化学结合和原子协调是发现新的低导热材料的关键.
研究的目的:
- 为了发现一种具有本质低导热性的新型三元硫化物.
- 在新材料中研究原子结构,结合和声子传输之间的关系.
主要方法:
- 合成一种新的三元硫化物,Cu2ZrS3,通过将铜离子纳入ZrS2.2.
- 分析晶体结构,协调环境 ([CuS4],[ZrS6],[CuS3]) 和化学结合.
- 在各种温度下测量网格导热率 (κL).
主要成果:
- Cu2ZrS3 具有固有的低晶格导热率 (κL),在 300 K 时为 0.83 W m−1 K−1,在 683 K 时为 0.35 W m−1 K−1.
- 由于三坐标Cu原子的不对称结合,观察到明显的语音非和性.
- 该材料在硫化物中显示出极低的导热率.
结论:
- 2ZrS3对于需要低导热度的应用来说是一个有前途的材料.
- 层内原子替代是一种有效的策略,用于设计过渡金属二甲基化物 (TMDC) 中的低 κL 材料.
- 这项工作为开发先进的热管理材料提供了新的途径.
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