InSb具有极高的迁移率和较高的塞贝克系数，高热导率是制约其热电性能的主要障碍。本项目通过引入共晶熔化和氧化物“置换”两个原位反应对InSb化合物电热输运性能进行协同调控。首先，共晶体在共晶反应温度以上原位熔化形成的共晶熔体和氧化物原位“置换”反应形成的In2O3纳米颗粒可以大幅度散射声子，降低材料的热导率；其次，原位“置换”反应形成的阳离子掺杂效应还将对材料的电输运性能产生调控效果；而且均匀分布的In2O3纳米颗粒还可以弥散强化材料，提高InSb化合物的机械性能。通过本项目的研究，探明共晶体分布、共晶体重熔对InSb基材料电热输运行为的影响机制，揭示氧化物原位“置换”反应的热力学及动力学行为及其对InSb化合物热电材料电热输运性能的影响规律，从而优化材料的成分设计并对共晶重熔以及原位“置换”反应实现有效调控，进而优化InSb基材料的热电性能和机械性能。

Although with an ultrahigh mobility and moderate Seebeck coefficient, InSb shows an inferior ZT due to its high thermal conductivity. To improve its thermoelectric performance, two in-situ reactions, eutectic melting and oxide "replacement", are employed to regulate the electrical and thermal transport properties of InSb in the project. Firstly, thermal conductivity can be remarkably reduced by the eutect melts and In2O3 nanoinclusions derived from the in-situ "replacement" reaction; secondary, the electrical transport properties can be tuned by the cation doping effect due to the in-situ "replacement" reaction; moreover, the mechanical performance can also be enhanced by the dispersive In2O3 nanoinclusions. By the research of this project, the thermodynamic and kinetics of in-situ "replacement" reaction will be explored, and the effect of eutectic melting and oxide "replacement" reactions on the electrical and thermal transport behaviors of InSb will be elucidated elaborately. Accordingly, the process of two in-situ reactions will be tuned and the thermoelectric and mechanical performance of InSb compound will be optimized. This work is not only of theoretical and practical signicance to InSb compound thermoelectric materials, but also of referential value to the R&D of new thermoelectric materials.