A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Preparation method of Cr/Te co-doped PbSe-based thermoelectric material
The invention provides a preparation method of a Te/Cr co-doped PbSe-based thermoelectric material, and belongs to the field of energy conversion. A high-temperature solid-phase reaction device and a temperature program are improved to ensure stable proceeding of the reaction. The PbSe-based thermoelectric material doped with a certain amount of Te and Cr is prepared by using a high-temperature solid-phase reaction and a rapid hot-pressing process. Pb powder, Se powder, Cr powder and Te powder are used as raw materials, a Pb1-xCrxSe1-yTey material sample is prepared by adopting a high-temperature solid-phase method, then the Pb1-xCrxSe1-yTey material sample is subjected to hot pressing sintering by adopting a rapid hot pressing process, and a series of Pb1-xCrxSe1-yTey thermoelectric materials are prepared. The sample preparation process is simple and rapid, the preparation period is short, the preparation cost is low, the requirement for equipment is low, the density of the obtained sample is high, and the conductive type of PbSe can be converted into an N-type thermoelectric material within the whole temperature range (323K-823K). The defect that the thermoelectric figure of merit of a traditional PbSe thermoelectric material is too low is overcome. The ZT of the Pb0. 97Cr0. 03Se0. 94Te0. 05 thermoelectric material obtained by the invention is 0.44 when the temperature is 673K, and is 4.40 times that of an uncompounded sample PbSe.
本发明提供了一种Te/Cr共掺PbSe基热电材料的制备方法，属于能源转换领域。通过改进高温固相反应装置和温度程序以保证反应的稳定进行。利用高温固相反应和快速热压工艺制备得到掺杂一定量Te、Cr的PbSe基热电材料。以Pb粉、Se粉、Cr粉，Te粉为原料，采用高温固相法制备获得Pb1‑xCrxSe1‑yTey材料样品，然后采用快速热压工艺对其进行热压烧结，制得一系列Pb1‑xCrxSe1‑yTey热电材料。本发明制样工艺简单快捷，制备周期短，制备成本低，对设备要求低，所得样品致密度高，可将PbSe的导电类型在整个温度范围内（323 K~823 K）转变为N型热电材料。本发明解决了传统PbSe热电材料热电优值过低的缺点。发明获得的Pb0.97Cr0.03Se0.94Te0.06热电材料在673K时ZT为0.44，是未复合样品PbSe的4.40倍。
Preparation method of Cr/Te co-doped PbSe-based thermoelectric material
The invention provides a preparation method of a Te/Cr co-doped PbSe-based thermoelectric material, and belongs to the field of energy conversion. A high-temperature solid-phase reaction device and a temperature program are improved to ensure stable proceeding of the reaction. The PbSe-based thermoelectric material doped with a certain amount of Te and Cr is prepared by using a high-temperature solid-phase reaction and a rapid hot-pressing process. Pb powder, Se powder, Cr powder and Te powder are used as raw materials, a Pb1-xCrxSe1-yTey material sample is prepared by adopting a high-temperature solid-phase method, then the Pb1-xCrxSe1-yTey material sample is subjected to hot pressing sintering by adopting a rapid hot pressing process, and a series of Pb1-xCrxSe1-yTey thermoelectric materials are prepared. The sample preparation process is simple and rapid, the preparation period is short, the preparation cost is low, the requirement for equipment is low, the density of the obtained sample is high, and the conductive type of PbSe can be converted into an N-type thermoelectric material within the whole temperature range (323K-823K). The defect that the thermoelectric figure of merit of a traditional PbSe thermoelectric material is too low is overcome. The ZT of the Pb0. 97Cr0. 03Se0. 94Te0. 05 thermoelectric material obtained by the invention is 0.44 when the temperature is 673K, and is 4.40 times that of an uncompounded sample PbSe.
本发明提供了一种Te/Cr共掺PbSe基热电材料的制备方法，属于能源转换领域。通过改进高温固相反应装置和温度程序以保证反应的稳定进行。利用高温固相反应和快速热压工艺制备得到掺杂一定量Te、Cr的PbSe基热电材料。以Pb粉、Se粉、Cr粉，Te粉为原料，采用高温固相法制备获得Pb1‑xCrxSe1‑yTey材料样品，然后采用快速热压工艺对其进行热压烧结，制得一系列Pb1‑xCrxSe1‑yTey热电材料。本发明制样工艺简单快捷，制备周期短，制备成本低，对设备要求低，所得样品致密度高，可将PbSe的导电类型在整个温度范围内（323 K~823 K）转变为N型热电材料。本发明解决了传统PbSe热电材料热电优值过低的缺点。发明获得的Pb0.97Cr0.03Se0.94Te0.06热电材料在673K时ZT为0.44，是未复合样品PbSe的4.40倍。
Preparation method of Cr/Te co-doped PbSe-based thermoelectric material
一种Cr/Te共掺PbSe基热电材料的制备方法
SONG JIMING (author) / WEI RONG (author)
2023-04-21
Patent
Electronic Resource
Chinese
N-type PbSe-based thermoelectric material and preparation method and application thereof
| European Patent Office | 2022
High-performance N-type PbSe thermoelectric material and preparation method thereof
| European Patent Office | 2022
Thermoelectric properties of pressureless-sintered PbSe ceramics
| British Library Online Contents | 1998
Heavily Doped p-Type PbSe with High Thermoelectric Performance: An Alternative for PbTe
| British Library Online Contents | 2011