Ag 2 Te掺杂对p型Bi 0.5 Sb 1.5 Te 3 块状合金热电性能的影响
Source abstract
Abstract
采用真空熔炼、机械球磨及放电等离子烧结技术 (SPS) 制备得到了(Ag 2 Te)x(Bi 0.5 Sb 1.5 Te 3 ) 1- x ( x = 0, 0.025, 0.05, 0.1) 系列样品, 性能测试表明, Ag 2 Te的掺入可以显著改变材料的热电性能变化趋势, 掺杂样品在温度为450~550 K范围内具有较未掺杂样品更优的热电性能. 适当量的Ag2Te掺入能够有效地提高材料的声子散射, 降低材料的热导率. 在测试温度范围内, (Ag 2 Te) 0.05 (Bi 0.5 Sb 1.5 Te 3 ) 0.95 具有最低的晶格热导, 室温至575 K范围内保持在0.2 ~ 0.3 W/(m·K)之间, 在575 K时, (Ag 2 Te) 0.05 (Bi 0.5 Sb 1.5 Te 3 ) 0.95 试样具有最大热电优值 ZT = 0.84, 相较于未掺杂样品提高了约20%.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Metallurgical and Alloy Processes · Chalcogenide Semiconductor Thin Films
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