Article
Chemistry, Physical
Yiping Jiang, Li Na, Hongan Ma
Summary: The HPHT technique was used to prepare Co4Sb11TexSn1-x materials, which exhibited improved thermoelectric performance with a minimum lattice thermal conductivity of 1.41 Wm(-1)K(-1) and a maximum ZT of 1.13. This method significantly reduced reaction duration and offers a novel route for the synthesis of thermoelectric materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Boyu Wang, Debao Fang, Wen Yi, Shiyuan Zhao, Junqin Li, Jingbo Li, Yongjie Zhao, Haibo Jin
Summary: By doping Se fillers and Ni into skutterudite, the lattice thermal conductivity can be reduced and thermodynamic stability can be improved, which has a positive impact on thermoelectric properties.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Robin Kumar, Jagjiwan Mittal, Monica Jaiswal
Summary: In this study, a simple method to fill multiwalled carbon nanotubes (MWCNT) with silver has been presented, leading to an increase in both the thermal diffusivity and electrical conductivity of the hybrid MWCNTs. The hybrid MWCNT film demonstrated rapid and reversible sensing for I-2 vapors, although the sensor recovery process required heating at a higher temperature. The Ag hybrid MWCNTs film displayed high stability and selectivity for I-2 vapors even after repeated cycles of exposure.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Chemistry, Physical
Qian Zhao, Jiawei Jiang, Wei Zhao, Sheng-Hua Li, Wenbo Mi, Chun Zhang
Summary: A novel conductive metal-organic framework with a Kagome lattice, truxone-Cu, was successfully synthesized and demonstrated high grain conductivity and excellent catalytic activity for the oxygen reductive reaction.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Ceramics
Di Jin, Zheng Ruan, Bo Duan, Jialiang Li, Pengcheng Zhai, Houjiang Yang, Hongtao Wang, Guodong Li, Ling Zhou
Summary: The study shows that relieving pressure during heating can significantly increase the grain size and internal porosity of skutterudites, leading to reduced thermal conductivity and higher ZT values. This newly developed OS-HP method allows for rapid fabrication of highly porous structured skutterudites with low-melting-point compositions.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Kouta Awaji, Ryosuke Nakajima, Kazuya Nishimura, Toma Takedachi, Tetsuya Ando, Yukihiro Kawamura, Hirotada Gotou, Chihiro Sekine
Summary: Partially filled skutterudite compounds RxCo4Sb12 (R = In, Tb and Dy, nominal composition 0.1 <= x <= 1.5) were synthesized under high pressure. The samples were characterized by XRD and SEM-EDX, and the highest filling fractions for In, Tb, and Dy were determined. Electrical and thermal properties were measured, and the ZT value of 0.10 was obtained for In0.8Co4Sb12 at 300 K. Additionally, the dependence of lattice thermal conductivity on the guest ion R was systematically studied.
MATERIALS TRANSACTIONS
(2022)
Article
Materials Science, Characterization & Testing
Jinxiang Ai, Bingbing Zeng, Jingxian Qin, Yu Zheng, Shaoyun Guo
Summary: The thermoplastic polyurethane/multi-walled carbon nanotubes filled TPU bilayer composites with tunable layer thickness ratios were fabricated via layer-assembly coextrusion. The particle transfer at the interface played a key role in electrical resistivity prediction and the bilayer composites exhibited good conductivity, balanced mechanical properties, and excellent absorption-dominated electromagnetic interference shielding effectiveness.
Article
Chemistry, Inorganic & Nuclear
Yong Tan, Limin Ma, Yishu Wang, Wei Zhou, Xiaolu Wang, Fu Guo
Summary: The structure stability, mechanical properties, and thermodynamic behaviors of Al4Si6La3 compound were investigated in a wide pressure range of 0-100 GPa using first-principles calculations based on density functional theory. The results showed that the compound was thermodynamically stable at 0 GPa but became unstable with increasing pressure. The compound exhibited ductile nature at pressures up to 100 GPa, and the Debye temperature and minimum thermal conductivity were improved with increasing pressure. The analysis of electronic structures revealed the formation of covalent bonds between Al-Si and La-Si in the compound, while Al-La formed antibonding states at different pressures.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Physics, Applied
Yaqi Chen, Xin Fan, Shan Gao, Wenting Ji, Xinjian Li, Yuewen Zhang, Hongan Ma, Xiaopeng Jia
Summary: A series of S-filled Te-Sn double-substituted skutterudite compounds were synthesized, and their phase composition, microstructure, and thermoelectric properties were systematically investigated. The introduction of S increased the substitution limit of Te in the Sb site. Special microstructures were observed in the samples synthesized under high-pressure conditions. The thermoelectric performance studies showed that a small amount of S filling optimized the Seebeck coefficient and increased the power factor of the samples. The thermal conductivity of the samples decreased significantly with an increase in the amount of S introduced. The maximum zT values of the samples were 0.17 at room temperature and 1.26 at 773K.
MODERN PHYSICS LETTERS B
(2023)
Article
Materials Science, Ceramics
Ning Liu, Lefu Mei, Jianxiong Bin, Ze Zhang, Zhijian Peng
Summary: Novel scheelite structures of fluorescent materials were successfully prepared using a high-temperature solid-phase process. Tests revealed that certain phosphors showed good luminescence properties and could be used in the fabrication of LED devices.
JOURNAL OF ADVANCED CERAMICS
(2021)
Article
Chemistry, Physical
Pradeep Kumar, Shabir Ahmad Mir, Dinesh C. Gupta
Summary: Computational approaches are used to investigate the structural and physical properties of filled skutterudite materials NdRu4Sb12 and EuRu4Sb12, revealing their stability in the ferromagnetic phase and high spin polarization. Spin-polarized band structures indicate metallic behavior for both types of spin electrons, with Nd and Eu-based materials having magnetic moments of 3.58 and 6.78 mu B, respectively. Non-negative elastic constants and thermodynamic properties are also calculated to verify the mechanical stability and study temperature and pressure dependencies.
INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
(2022)
Article
Polymer Science
Shuzhan Wang, Hui He, Xiaodong Peng, Handong Chen
Summary: This study successfully prepared a graphite-filled polypropylene/polyamide 6 composite using FDM technology, studied the effects of graphite on the composite properties, and explored the influence of different printing arrangements. Through microscopic morphology characterization and force analysis, the performance regulation mechanisms were deeply investigated.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Jianbing Yang, Yanjun Zhao, Mingjun Pang, Lingfeng Zhao, Cong Xie, Fenggui Wei, Xingzhi Pang
Summary: This study investigates the influence of pressure on the mechanical, thermodynamic, and electronic properties of orthorhombic and hexagonal Ti3Sn compounds using first-principles calculations. The results show that high pressure improves the elastic moduli of the orthorhombic phase and the bulk modulus of the hexagonal phase. Moreover, high pressure enhances the Debye temperature and minimum thermal conductivity of the orthorhombic phase but has a maximum effect at 10 GPa for the hexagonal phase. The electronic structures reveal stronger p-d hybridization between Sn and Ti atoms in the orthorhombic phase compared to the hexagonal phase.
Article
Chemistry, Multidisciplinary
C. Ji, T. Fan, G. Chen, X. Bai, J. Wang, J. He, W. Cai, R. Gao, X. Deng, Z. Wang, X. Lei, C. Fu
Summary: The study showed that microwave sintering method can effectively decrease the grain size and enhance the compactness of BFO-BTO ceramics, while the introduction of BTO can strengthen its dielectric relaxation behavior.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Bao Jiang, Kewang Zhang, Yuchen Yan, Yanhui Zhang, Zhi Su
Summary: In this study, the first bromine-containing iodate single crystal Pb2IO3Br3 was successfully synthesized. The crystal structure was determined by X-ray diffraction and the relationship between crystal structure and optical properties was investigated through first-principle calculations.
SOLID STATE SCIENCES
(2022)
