SIC OpenIR
Thermal Conductivity during Phase Transitions
Chen, Hongyi; Yue, Zhongmou; Ren, Dudi; Zeng, Huarong; Wei, Tianran; Zhao, Kunpeng; Yang, Ronggui; Qiu, Pengfei; Chen, Lidong; Shi, Xun
2019-02-08
Source PublicationADVANCED MATERIALS
ISSN0935-9648
Volume31Issue:6
SubtypeArticle
AbstractThermal conductivity is a very basic property that determines how fast a material conducts heat, which plays an important and sometimes a dominant role in many fields. However, because materials with phase transitions have been widely used recently, understanding and measuring temperature-dependent thermal conductivity during phase transitions are important and sometimes even questionable. Here, the thermal transport equation is corrected by including heat absorption due to phase transitions to reveal how a phase transition affects the measured thermal conductivity. In addition to the enhanced heat capacity that is well known, it is found that thermal diffusivity can be abnormally lowered from the true value, which is also dependent on the speed of phase transitions. The extraction of the true thermal conductivity requires removing the contributions from both altered heat capacity and thermal diffusivity during phase transitions, which is well demonstrated in four selected kinds of phase transition materials (Cu2Se, Cu2S, Ag2S, and Ag2Se) in experiment. This study also explains the lowered abnormal thermal diffusivity during phase transitions in other materials and thus provides a novel strategy to engineer thermal conductivity for various applications.
Keywordphase transition thermal conductivity thermal diffusivity thermoelectric materials
DOI10.1002/adma.201806518
Language英语
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27338
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Chen, Hongyi,Yue, Zhongmou,Ren, Dudi,et al. Thermal Conductivity during Phase Transitions[J]. ADVANCED MATERIALS,2019,31(6).
APA Chen, Hongyi.,Yue, Zhongmou.,Ren, Dudi.,Zeng, Huarong.,Wei, Tianran.,...&Shi, Xun.(2019).Thermal Conductivity during Phase Transitions.ADVANCED MATERIALS,31(6).
MLA Chen, Hongyi,et al."Thermal Conductivity during Phase Transitions".ADVANCED MATERIALS 31.6(2019).
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