Li Zhang , Hui Liu , Yaozhen Shen , Yuanting Wu , Guoquan Suo , Beibei Zhu , Yanling Yang
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引用次数: 0
Abstract
Bi2S3 is a potential thermoelectric material due to its high Seebeck coefficient (S), low thermal conductivity (κ) and environmentally friendly elemental composition. However, pristine Bi2S3 suffers from a low thermoelectric performance primarily owing to the intrinsic low electrical conductivity (σ). In this work, we employ CeCl3 doping to promote the σ of Bi2S3 by a hydrothermal method. Doping 1.0 % mol CeCl3 provides more electrons to increase the carrier concentration to 2.73 1019 cm−3 of Bi2S3 at room temperature, which leads to significant high σ and power factor of 242 μW m−1 K−2 at 573 K. In addition, the formation of micro–nano pores in the doped Bi2S3 bulk samples contribute to the phonon scattering as well as the reduction of lattice thermal conductivity. A peak ZT of ∼0.31 at 623 K is obtained in the Bi2S3 bulk sample doped with 1.0 % mol CeCl3, which is almost twice as high as the pristine Bi2S3. Simultaneously, the Vickers hardness of 1.0 % mol CeCl3 doped Bi2S3 samples achieves to approximately 1.28 GPa, which is enhanced by nearly 40 % compared to pristine Bi2S3. This study has provided a facile method for realizing high thermoelectric performance and high mechanical property of Bi2S3 materials.
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.