Enhanced thermoelectric performance of Bi0.5Sb1.5Te3 alloys via amorphous glass particle integration

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-06-25 DOI:10.1016/j.mseb.2025.118544

Reyhan Başar Boz , Cem Sevik , Servet Turan

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Abstract

Enhancing thermoelectric performance requires optimizing both power factor and thermal conductivity, a key challenge addressed through innovative composite strategies. In this study, milled amorphous glass particles (GPs) produced by high-energy ball milling (wt%) were added to BiSbTe-based alloys, and composites were obtained by spark plasma sintering. The results indicate that as the GPs content increases, the thermal conductivity (

k

) decreases, which is 6% lower than the BiSbTe matrix owing to enhanced phonon scattering of particles as well as a combination of different scattering mechanisms, including point defects, grain boundaries, and dislocations. This can provide a platform for maximizing the reduction of lattice thermal conductivity through the scattering of a full spectrum of phonons from low to high frequencies. Electrical conductivity increased by 10% with higher GPs content, while the Seebeck coefficient remained nearly constant, indicating a promising way to reduce thermal conductivity while enhancing electrical performance.

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通过非晶玻璃颗粒集成提高Bi0.5Sb1.5Te3合金的热电性能

提高热电性能需要优化功率因数和导热系数，这是通过创新复合材料策略解决的关键挑战。在本研究中，将高能球磨（wt%）产生的磨晶非晶玻璃颗粒（GPs）加入到bisbte基合金中，并通过火花等离子烧结得到复合材料。结果表明，随着GPs含量的增加，由于粒子的声子散射增强以及点缺陷、晶界和位错等不同散射机制的综合作用，热导率(k)降低，比bte基体低6%。这可以提供一个平台，通过全谱声子从低频到高频的散射，最大限度地降低晶格热导率。导电性随着GPs含量的增加提高了10%，而塞贝克系数几乎保持不变，这表明在提高电性能的同时降低导热系数是一种很有前途的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.