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SnTe-based thermoelectric material with multi-scale nano-composite structure and preparation method of SnTe-based thermoelectric material
The invention discloses a SnTe-based thermoelectric material and a preparation method thereof, and relates to the field of thermoelectric materials, in particular to a SnTe-based thermoelectric material with a multi-scale nano composite structure and a preparation method thereof. The chemical formula of the thermoelectric material is Sn < 1-x > Y < x > Te < 5 >% Cu2Te, x is 0, 0.01, 0.03, 0.05 or 0.07, and the blocky SnTe-based thermoelectric material is obtained by taking high-purity metal elementary substances as raw materials, burdening according to the stoichiometric ratio of the chemical formula, performing vacuum flame tube sealing, melting reaction quenching and high-temperature annealing, grinding into powder and performing vacuum discharge plasma sintering. Compared with the prior art, SnTe is co-doped with Cu and Y, so that the hole carrier concentration and the energy band structure of the SnTe material are optimized. Meanwhile, the solid solubility of Y is improved, so that a multi-scale nano structure is formed in situ in SnTe, the heat conductivity of the SnTe is further reduced, and the thermoelectric performance of the SnTe material is greatly improved.
本发明公开了一种SnTe基热电材料及其制备方法，涉及热电材料领域，具体涉及一种具有多尺度纳米复合结构的SnTe基热电材料及其制备方法。热电材料化学式为Sn1‑xYxTe‑5％Cu2Te，其中，x取0、0.01、0.03、0.05或0.07，其通过以高纯度金属单质为原料，按所述的化学式的化学计量比进行配料，通过真空火焰封管、熔融反应淬火、高温退火后，研磨成粉末，进行真空放电等离子烧结，得到块状SnTe基热电材料。与现有技术相比，本发明通过Cu、Y共掺杂SnTe，优化了SnTe材料的空穴载流子浓度和能带结构。同时，提升Y固溶度使得在SnTe中原位形成多尺度纳米结构，进一步降低其热导率，从而大幅度提升了SnTe材料热电性能。
SnTe-based thermoelectric material with multi-scale nano-composite structure and preparation method of SnTe-based thermoelectric material
The invention discloses a SnTe-based thermoelectric material and a preparation method thereof, and relates to the field of thermoelectric materials, in particular to a SnTe-based thermoelectric material with a multi-scale nano composite structure and a preparation method thereof. The chemical formula of the thermoelectric material is Sn < 1-x > Y < x > Te < 5 >% Cu2Te, x is 0, 0.01, 0.03, 0.05 or 0.07, and the blocky SnTe-based thermoelectric material is obtained by taking high-purity metal elementary substances as raw materials, burdening according to the stoichiometric ratio of the chemical formula, performing vacuum flame tube sealing, melting reaction quenching and high-temperature annealing, grinding into powder and performing vacuum discharge plasma sintering. Compared with the prior art, SnTe is co-doped with Cu and Y, so that the hole carrier concentration and the energy band structure of the SnTe material are optimized. Meanwhile, the solid solubility of Y is improved, so that a multi-scale nano structure is formed in situ in SnTe, the heat conductivity of the SnTe is further reduced, and the thermoelectric performance of the SnTe material is greatly improved.
本发明公开了一种SnTe基热电材料及其制备方法，涉及热电材料领域，具体涉及一种具有多尺度纳米复合结构的SnTe基热电材料及其制备方法。热电材料化学式为Sn1‑xYxTe‑5％Cu2Te，其中，x取0、0.01、0.03、0.05或0.07，其通过以高纯度金属单质为原料，按所述的化学式的化学计量比进行配料，通过真空火焰封管、熔融反应淬火、高温退火后，研磨成粉末，进行真空放电等离子烧结，得到块状SnTe基热电材料。与现有技术相比，本发明通过Cu、Y共掺杂SnTe，优化了SnTe材料的空穴载流子浓度和能带结构。同时，提升Y固溶度使得在SnTe中原位形成多尺度纳米结构，进一步降低其热导率，从而大幅度提升了SnTe材料热电性能。
SnTe-based thermoelectric material with multi-scale nano-composite structure and preparation method of SnTe-based thermoelectric material
一种具有多尺度纳米复合结构的SnTe基热电材料及制备方法
LI HAN (author) / LEI KANG (author) / HUANG YUYONG (author) / CAI ZHENGTANG (author) / OUYANG XIAOYONG (author)
2023-10-20
Patent
Electronic Resource
Chinese
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