Thermal Conductivity during Phase Transitions
文献类型：期刊论文
| 作者 | Chen, Hongyi; Yue, Zhongmou; Ren, Dudi; Zeng, Huarong; Wei, Tianran; Zhao, Kunpeng; Yang, Ronggui; Qiu, Pengfei; Chen, Lidong; Shi, Xun |
| 刊名 | ADVANCED MATERIALS
 |
| 出版日期 | 2019-02-08 |
| 卷号 | 31期号:6 |
| 关键词 | phase transition thermal conductivity thermal diffusivity thermoelectric materials |
| ISSN号 | 0935-9648 |
| DOI | 10.1002/adma.201806518 |
| 文献子类 | Article |
| 英文摘要 | 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 (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. |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| 语种 | 英语 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 源URL | [http://ir.sic.ac.cn/handle/331005/27338]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 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). |
入库方式： OAI收割
来源：上海硅酸盐研究所
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