有效的扩散屏障层实现了n型Bi2Te2.7Se0.3热电发生器的热稳定性
Min Liu1, Xinyue Zhang2, Shanshan Hu1
1Interdisciplinary Materials Research Center, School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China.
ACS applied materials & interfaces
|May 5, 2025
概括
(Ti) 有效地防止了甲化物 (Bi2Te3) 合金中的扩散,增强了热电装置的稳定性. 这一突破通过确保在时间和热循环中保持一致的性能来改善发电应用.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 能源转换 能源转换
背景情况:
- 土化物 (Bi2Te3) 合金对于在室温附近的商业热电发电至关重要.
- 提高n型Bi2Te3设备的性能和长期稳定性对于先进的应用是必不可少的.
- 热电材料和电极之间的界面扩散可以降低设备的性能.
研究的目的:
- 为了研究n型Bi2Te3热电装置的金属屏障材料.
- 要了解11种金属在n型Bi2Te2.7Se0.3.3中的扩散行为.
- 提高热电设备的稳定性和发电能力.
主要方法:
- 在n型Bi2Te2.7Se0.3.3中对11种金属的扩散行为分析.
- 根据粘合和扩散系数确定有前途的屏障材料.
- 使用Ti作为Ni电极的屏障层制造单脚设备和模块.
主要成果:
- (Ti) 与在低温下烧结的Bi2Te2.7Se0.3具有很好的结合性,并且具有较低的扩散系数.
- 用Ti作为屏障层制造的设备显示出稳定的输出功率和转换效率.
- 屏障层确保了热电发电机在495K下运行160小时的优良热稳定性.
结论:
- 是n型Bi2Te3热电器件的高效屏障材料,防止界面扩散.
- 使用Ti显著提高了热电发电机的热稳定性和长期可靠性.
- 这一发现为更强大,更高效的热电发电应用铺平了道路.
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