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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201806518
|2 doi
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|a pubmed24n0972.xml
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|a DE-627
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|e rakwb
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|a eng
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| 100 |
1 |
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|a Chen, Hongyi
|e verfasserin
|4 aut
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|a Thermal Conductivity during Phase Transitions
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|c 2019
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 11.02.2019
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a Thermal 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 (Cu2 Se, Cu2 S, Ag2 S, and Ag2 Se) 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
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|a Journal Article
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|a phase transition
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|a thermal conductivity
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|a thermal diffusivity
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4 |
|a thermoelectric materials
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|a Yue, Zhongmou
|e verfasserin
|4 aut
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1 |
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|a Ren, Dudi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zeng, Huarong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wei, Tianran
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhao, Kunpeng
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yang, Ronggui
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Qiu, Pengfei
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chen, Lidong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Shi, Xun
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 31(2019), 6 vom: 30. Feb., Seite e1806518
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:31
|g year:2019
|g number:6
|g day:30
|g month:02
|g pages:e1806518
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|u http://dx.doi.org/10.1002/adma.201806518
|3 Volltext
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