Precisely-controlled synthesis of thermoelectric oxides via chemical solution process and enhancement of their performance by microstructural regulation

采用化学溶液法合成了热电氧化物及其复合材料，并对其微观结构进行了控制，从而提高了热电性能，并建立了较低温度和较短操作时间的合成工艺。特别是在n型SrTiO_3中，掺杂TiB_2可以有效地提高材料的热电性能，降低材料的电阻率，降低烧结温度约200K。结果表明，采用化学溶液法，可以在较低的温度和较短的操作时间内建立从粉末制备到最终烧结的全合成工艺。

The thermoelectric oxides and their composites were synthesized and their microstructures were controlled by using the chemical solution process, resulting in enhancement of thermoelectric performance and establishment of synthesis process at lower temperature and for shorter period of operating time. Especially in the case of the n-type SrTiO_3, mixing with TiB_2 was found to be quite effective for enhancing thermoelectric performance due to reduction in electrical resistivity and decreasing temperature of sintering by about 200K. As a result, the total synthesis process from powder preparation to final sintering at lower temperature and for shorter period of operating time was established by using the chemical solution process.