n型氧化物热电材料研究进展

Research progress of n-type oxides thermoelectric materials

氧化物热电材料在空气中具有较高的热稳定性和化学稳定性,在高温热电领域具有重要应用前景.与p型氧化物热电材料相比,n型材料的ZT值普遍偏低,制约了氧化物热电器件的发展.本文详细介绍了目前几种代表性n型氧化物热电材料的研究进展,分析了这几种材料的制备方法及电、热调控手段对其热电性能的影响和物理机制.在此基础上,提出了n型氧化物热电材料性能进一步优化的思路.

Oxide thermoelectric materials have high thermal and chemical stability in air,which show promising potential in the field of high temperature thermoelectric applications.Compared with p-type oxide thermoelectric materials,the ZT values of n-type oxides are generally low,limiting the development of oxides-based thermoelectric devices.This paper discussed in detail the research progresses of the present representative n-type oxide thermoelectric materials,analyzed the preparation methods,the physical mechanisms,and the effects of electrical and thermal modulation on the thermoelectric performances of these materials.Some new ideas for further improvment of the performances of n-type oxide thermoelectrical materials were proposed.