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用Sn和S进行双重注的 permingeatite化合物的热电特性

Bong-Ki Hong¹, Il-Ho Kim¹

¹Department of Materials Science and Engineering, College of Engineering, Korea National University of Transportation, Chungju 27469, Republic of Korea.

Materials (Basel, Switzerland)

|October 16, 2024

概括

这项研究合成了Sn/S双胺,增强了热电性质. 兴奋剂提高了先进热电材料的功率因子和无维度功率 (ZT) 值.

科学领域:

材料科学材料科学材料科学
固态物理固态物理
热电学是一种热电学.

背景情况:

热电材料将热转化为电力,这对于废热回收至关重要.
永久性矿 (Cu3SbSe4) 是有前途的,但需要性能优化.
兴奋剂是提高热电性能的一个关键策略.

研究的目的:

为了合成Sn/S双合的 permingeatites (Cu3Sb1-xSnxSe4-ySy).
研究Sn和S兴奋剂对晶体学和热电性质的影响.
为了优化热电功率 (ZT) 的数字.

主要方法:

固态合成的Cu3Sb1-xSnxSe4-ySy化合物. 固态合成的Cu3Sb1-xSnxSe4-ySy化合物.
使用格子常数和四角性分析晶体学参数.
热电特性评估:电导率,西贝克系数,功率因子和热导率.
温度依赖测量高达623K的测量.

主要成果:

双 Sn/S 兴奋剂显著改变了 permingeatite 格子参数,而 S 的影响更大.
增加的Sn兴奋剂和减少的S兴奋剂增强了载体度和电导率.
增加的S兴奋剂和减少的Sn兴奋剂提高了Seebeck系数,表明p型行为.
功率因子得到了显著的改善,达到1.12mWm-1K-2的Cu3Sb0.98Sn0.02Se3.75S0.25在623K (2.3倍高).
格子的热导率随温度下降;电子的热导率显示出最小的依赖.
无维度值 (ZT) 的数字有所改善,Cu3Sb0.98Sn0.02Se3.50S0.50在623K (1.7倍高) 达到0.68的ZT.

结论:

Sn/S 双重注有效地改变了 permingeatites 的热电特性.
优化的兴奋剂水平提高了功率因子和ZT.
这些发现为开发基于化基酸盐的高效热电材料提供了可行的途径.

关键词:

这是双重兴奋剂.这种情况是永久性的.热电热电的电力.

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