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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
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。
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.
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
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。
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.
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
04.03.2025
Patent
Elektronische Ressource
Chinesisch
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