在Te-稳定立方Ag2TeS1-固体溶液中具有高度和优异的热电性能
Shenlong Zhong1,2, Hao Luo1,3, Keke Liu1,2
1Hubei Longzhong Laboratory, Wuhan University of Technology Xiangyang Demonstration Zone, Xiangyang 441000, China.
ACS applied materials & interfaces
|July 5, 2024
概括
新的硫化银 (Ag2S) 和化 (Ag2Te) 固体溶液提供了增强的机械耐用性和优越的热电性能. 这些材料保持稳定的立方相,对于在应力下运行的高性能热电器件至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 热电学是一种热电学.
背景情况:
- 硫化银 (Ag2S) 的立方相对于热电应用是可取的,但在低温下不稳定.
- 在Ag2S中的相变导致机械和热电性质的不利变化.
- 开发稳定立方相的材料是提高热电装置可靠性的关键.
研究的目的:
- 为了研究使用银化物 (Ag2Te) 兴奋剂稳定Ag2S立方相.
- 评估Ag2TexS1−x固体溶液的机械行为和热电性能.
- 为了确定高性能,耐用的热电材料的最佳组合.
主要方法:
- 合成Ag2TexS1−x固体溶液,其含量不同 (0.20 ≤ x ≤ 0.30).
- 在300K至773K的温度范围内进行相位稳定性分析.
- 机械测试,包括曲测试,以评估柔性和屈服强度.
- 热电性质测量,包括功率图 (ZT).
主要成果:
- Ag2TexS1−x (0.20 ≤ x ≤ 0.30) 样本保持了从 300 K 到 773 K 的稳定立方相.
- 样品在曲试验中表现出优越的柔性,没有骨折,与纯Ag2S不同.
- 该Ag2Te0.20S0.80样本显示高曲平均收益强度 (46.52MPa在673K).
- 热电性能超过了InSe和纯Ag2S,Ag2Te0.30S0.70在723 K时达到0.59的ZT.
结论:
- 用Ag2Te合Ag2S有效地稳定了立方相,增强了机械强度.
- 开发的Ag2TexS1−x固体溶液显示出耐用热电应用的巨大潜力.
- 与现有材料相比,优化的组合提供了更好的热电效率和机械完整性.
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