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High-performance N-type PbSe thermoelectric material and preparation method thereof
The invention provides a high-performance N-type PbSe thermoelectric material and a preparation method thereof, and belongs to the technical field of energy materials. The material is composed of Pb, Se, Te, S and Cu, and the atomic ratio of Pb: Se: Te: S: Cu is 1.02 +/-0.01: 0.72 +/-0.1: 0.2 +/-0.05: 0.08 +/-0.05: x (0 < = x < = 0.02). The PbSe thermoelectric material is prepared by combining a melting method, a hot pressing method and an annealing method. The N-type PbSe thermoelectric material prepared by the method has the advantages that compared with the existing N-type PbSe thermoelectric material, the lattice thermal conductivity is extremely low, the room temperature can be as low as 0.42 W m <-1 > K <-1 >, and the average ZT (ZTave) in a medium and low temperature region (300-573K) can be as high as 0.9. Compared with the existing N-type PbSe thermoelectric material, the N-type PbSe thermoelectric material has the advantages that the thermoelectric performance of N-type PbSe is greatly improved in a near room temperature region, and large-scale application in the fields of thermoelectric power generation and thermoelectric refrigeration can be realized.
本发明提供了一种高性能N型PbSe热电材料及其制备方法，属于能源材料技术领域。所述材料是由Pb、Se、Te、S、和Cu元素组成，其原子比Pb:Se:Te:S:Cu＝1.02±0.01:0.72±0.1:0.2±0.05:0.08±0.05:x(0≤x≤0.02)；所述的PbSe热电材料采用熔融法、热压法和退火结合的方法制备。该方法制备得到的N型PbSe热电材料的优点在于，与现有的N型PbSe热电材料相比，晶格热导率极低，室温可低至0.42W m‑1K‑1，在中低温区(300‑573K)的平均ZT(ZTave)可高达0.9。与现有N型PbSe热电材料相比，本发明使得N型PbSe的热电性能在近室温区有大幅度提升，能够在热电发电和热电制冷领域实现大规模应用。
High-performance N-type PbSe thermoelectric material and preparation method thereof
The invention provides a high-performance N-type PbSe thermoelectric material and a preparation method thereof, and belongs to the technical field of energy materials. The material is composed of Pb, Se, Te, S and Cu, and the atomic ratio of Pb: Se: Te: S: Cu is 1.02 +/-0.01: 0.72 +/-0.1: 0.2 +/-0.05: 0.08 +/-0.05: x (0 < = x < = 0.02). The PbSe thermoelectric material is prepared by combining a melting method, a hot pressing method and an annealing method. The N-type PbSe thermoelectric material prepared by the method has the advantages that compared with the existing N-type PbSe thermoelectric material, the lattice thermal conductivity is extremely low, the room temperature can be as low as 0.42 W m <-1 > K <-1 >, and the average ZT (ZTave) in a medium and low temperature region (300-573K) can be as high as 0.9. Compared with the existing N-type PbSe thermoelectric material, the N-type PbSe thermoelectric material has the advantages that the thermoelectric performance of N-type PbSe is greatly improved in a near room temperature region, and large-scale application in the fields of thermoelectric power generation and thermoelectric refrigeration can be realized.
本发明提供了一种高性能N型PbSe热电材料及其制备方法，属于能源材料技术领域。所述材料是由Pb、Se、Te、S、和Cu元素组成，其原子比Pb:Se:Te:S:Cu＝1.02±0.01:0.72±0.1:0.2±0.05:0.08±0.05:x(0≤x≤0.02)；所述的PbSe热电材料采用熔融法、热压法和退火结合的方法制备。该方法制备得到的N型PbSe热电材料的优点在于，与现有的N型PbSe热电材料相比，晶格热导率极低，室温可低至0.42W m‑1K‑1，在中低温区(300‑573K)的平均ZT(ZTave)可高达0.9。与现有N型PbSe热电材料相比，本发明使得N型PbSe的热电性能在近室温区有大幅度提升，能够在热电发电和热电制冷领域实现大规模应用。
High-performance N-type PbSe thermoelectric material and preparation method thereof
一种高性能N型PbSe热电材料及其制备方法
XIAO YU (author) / XU LIQING (author) / DING XIANGDONG (author)
2022-08-12
Patent
Electronic Resource
Chinese
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