利用熵工程提高BiCuSeO陶瓷的热电性能

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-05-01 DOI:10.1016/j.ceramint.2025.01.499

Jialing Jiang , Honglei Wang , Zhenjiu Xu , Zhuang Fu , Lijun Zhao , Lei Wang , Songtao Dong , Hongbo Ju

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引用次数: 0

摘要

(x = y = z = 0；X = 0.02, y = z = 0；X = y = 0.02, z = 0；采用高能球磨、冷等静压和烧结相结合的方法制备了x = y = z = 0.02)陶瓷。结果表明，多种元素的掺入导致了BiCuSeO体系中载流子浓度的增加，从而提高了导电性。特别是在323 K时，该体系的电导率从9.10 S cm−1 （BiCuSeO）提高到66.96 S cm−1 （Bi0.90Al0.02La0.02Sb0.02Y0.02Ca0.02CuSeO）。在773 K时，Bi0.90Al0.02La0.02Sb0.02Y0.02Ca0.02CuSeO的最大功率因数为421.71 μW m−1 K−2。在773 K时，掺杂后的体系导热系数从0.57 W m−1 K−1下降到0.29 W m−1。Bi0.90Al0.02La0.02Sb0.02Y0.02Ca0.02CuSeO的ZTmax值为~ 1.06，比纯样品（~ 0.25）提高了约4.2倍。这些发现表明，通过掺杂掺杂多种元素为提高BiCuSeO的热电性能提供了一种有希望的策略。

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Enhancing the thermoelectric performance of BiCuSeO ceramics by entropy engineering

Bi_{1−3x−y−z}Al_xLa_xSb_xY_yCa_zCuSeO (x = y = z = 0; x = 0.02, y = z = 0; x = y = 0.02, z = 0; and x = y = z = 0.02) ceramics were prepared using a combination of high-energy ball milling, cold-isostatic pressing, and sintering. Results demonstrated that the incorporation of multiple elements led to an increase in the carrier concentration within the BiCuSeO system, resulting in enhanced electrical conductivity. In particular, the electrical conductivity of the system increased from 9.10 S cm⁻¹ (BiCuSeO) to 66.96 S cm⁻¹ (Bi_0.90Al_0.02La_0.02Sb_0.02Y_0.02Ca_0.02CuSeO) at 323 K. Furthermore, the maximum power factor value of Bi_0.90Al_0.02La_0.02Sb_0.02Y_0.02Ca_0.02CuSeO was found to be 421.71 μW m⁻¹ K⁻² at 773 K. After doping, the thermal conductivity of the system decreased from 0.57 to 0.29 W m⁻¹ K⁻¹ at 773 K. The ZT_max value of Bi_0.90Al_0.02La_0.02Sb_0.02Y_0.02Ca_0.02CuSeO was ∼1.06, representing a considerable improvement of approximately 4.2 times compared to that of the pure sample (∼0.25). These findings suggest that the incorporation of multiple elements through doping offers a promising strategy for enhancing the thermoelectric performance of BiCuSeO.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.