Hierarchical Chemical Bonds Contributing to the Intrinsically Low Thermal Conductivity in alpha-MgAgSb Thermoelectric Materials

CORC > 上海硅酸盐研究所 > 中国科学院上海硅酸盐研究所 > 高性能陶瓷和超微结构国家重点实验室 > 期刊论文

	Hierarchical Chemical Bonds Contributing to the Intrinsically Low Thermal Conductivity in alpha-MgAgSb Thermoelectric Materials
	Ying, Pingjun 1; Li, Xin 2; Wang, Yancheng 3; Yang, Jiong 2; Fu, Chenguang 1; Zhang, Wenqing 2; Zhao, Xinbing 1; Zhu, Tiejun 1
刊名	ADVANCED FUNCTIONAL MATERIALS
	2017
卷号	27 期号:1
英文摘要	Understanding the lattice dynamics and phonon transport from the perspective of chemical bonds is essential for improving and finding high-efficiency thermoelectric materials and for many applications. Here, the coexistence of global and local weak chemical bonds is elucidated as the origin of the intrinsically low lattice thermal conductivity of non-caged structure Nowotny-Juza compound, alpha-MgAgSb, which is identified as a new type of promising thermoelectric material in the temperature range of 300-550 K. The global weak bonds of the compound lead to a low sound velocity. The unique three-centered Mg-Ag-Sb bonds in alpha-MgAgSb vibrate locally and induce low-frequency optical phonons, resulting in "rattling-like" thermal damping to further reduce the lattice thermal conductivity. The hierarchical chemical bonds originate from the low valence electron count of alpha-MgAgSb, with the feature shared by Nowotny-Juza compounds. Low lattice thermal conductivities are therefore highly possible in this series of compounds, which is verified by phonon and bulk modulus calculations on some of the compositions.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
研究领域[WOS]	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
关键词[WOS]	PERFORMANCE BULK THERMOELECTRICS ; AUGMENTED-WAVE METHOD ; JUZA NAZNX X ; HIGH FIGURE ; MERIT ; CRYSTALS ; ELECTRON ; ALLOYS ; SNSE ; SB
收录类别	SCI
语种	英语
WOS记录号	WOS:000391919900010
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/23378]
专题	上海硅酸盐研究所_高性能陶瓷和超微结构国家重点实验室_期刊论文
作者单位	1.Zhejiang Univ, Dept Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China 2.Shanghai Univ, Mat Genome Inst, 99 Shangda Rd, Shanghai 200444, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, 1295 Dingxi Rd, Shanghai 200050, Peoples R China
推荐引用方式 GB/T 7714	Ying, Pingjun,Li, Xin,Wang, Yancheng,et al. Hierarchical Chemical Bonds Contributing to the Intrinsically Low Thermal Conductivity in alpha-MgAgSb Thermoelectric Materials[J]. ADVANCED FUNCTIONAL MATERIALS,2017,27(1).
APA	Ying, Pingjun.,Li, Xin.,Wang, Yancheng.,Yang, Jiong.,Fu, Chenguang.,...&Zhu, Tiejun.(2017).Hierarchical Chemical Bonds Contributing to the Intrinsically Low Thermal Conductivity in alpha-MgAgSb Thermoelectric Materials.ADVANCED FUNCTIONAL MATERIALS,27(1).
MLA	Ying, Pingjun,et al."Hierarchical Chemical Bonds Contributing to the Intrinsically Low Thermal Conductivity in alpha-MgAgSb Thermoelectric Materials".ADVANCED FUNCTIONAL MATERIALS 27.1(2017).