Bi₂Te₃系热电材料性能优化研究

Research on Properties Optimization of Bi₂Te₃ Thermoelectric Materials

Bi2Te3系热电材料是室温下应用广泛的热电材料,热电材料能够实现热能和电能之间直接转换,在废热(余热)发电、太阳能热源发电、极端环境下的能源供给等方面有潜在的应用前景。本文从不同优化方法出发,分析了Bi2Te3系热电材料的制备方法及各自优化的优缺点,并根据所采用优化方法的不同,对Bi2Te3热电性能进行了探讨,分析了塞贝克系数S、电导率σ和热导率k关联耦合机制,并对热电材料的发展前景进行了展望。

Bi2Te3 thermoelectric materials are widely used at room temperature. Thermoelectric materials can realize direct conversion between heat and electric energy, and have potential application prospects in waste heat generation, solar heat source generation, energy supply under extreme environment and so on. Based on different optimization methods, this paper analyzes the prepa-ration methods and the thermoelectric properties of Bi2Te3 thermoelectric materials and the ad-vantages and disadvantages of their optimization. The coupling mechanism of Seebeck coefficient S, conductivity σ and thermal conductivity K is analyzed, and the development prospect of ther-moelectric materials is prospected.