A sound velocity method for determining isobaric specific heat capacity
Abstract Isobaric specific heat capacity (Cp) is an important parameter not only in physics but also for most materials. Its accurate measurement is particularly critical for performance evaluation of thermoelectric materials, but the experiments by differential scanning calorimetry (DSC) often lead...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-12-01
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| Series: | InfoMat |
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| Online Access: | https://doi.org/10.1002/inf2.12372 |
| _version_ | 1811310992545546240 |
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| author | Jun Pei Hezhang Li Hua‐Lu Zhuang Jinfeng Dong Bowen Cai Haihua Hu Jing‐Wei Li Yilin Jiang Bin Su Li‐Dong Zhao Jing‐Feng Li |
| author_facet | Jun Pei Hezhang Li Hua‐Lu Zhuang Jinfeng Dong Bowen Cai Haihua Hu Jing‐Wei Li Yilin Jiang Bin Su Li‐Dong Zhao Jing‐Feng Li |
| author_sort | Jun Pei |
| collection | DOAJ |
| description | Abstract Isobaric specific heat capacity (Cp) is an important parameter not only in physics but also for most materials. Its accurate measurement is particularly critical for performance evaluation of thermoelectric materials, but the experiments by differential scanning calorimetry (DSC) often lead to large uncertainties in the measurements, especially at elevated temperatures. In this study, we propose a simple method to determine Cp by measuring the sound velocity (υ) based on lattice vibration and expansion theory. The relative standard error of the υ is smaller than 1%, showing good accuracy and repeatability. The calculated Cp at elevated temperature (>300 K) increases slightly with increasing temperature due to the lattice expansion, which is more reasonable than the Dulong–Petit value. |
| first_indexed | 2024-04-13T10:10:01Z |
| format | Article |
| id | doaj.art-a7f5ffeb67c3467480d058363b5b76cf |
| institution | Directory Open Access Journal |
| issn | 2567-3165 |
| language | English |
| last_indexed | 2024-04-13T10:10:01Z |
| publishDate | 2022-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | InfoMat |
| spelling | doaj.art-a7f5ffeb67c3467480d058363b5b76cf2022-12-22T02:50:57ZengWileyInfoMat2567-31652022-12-01412n/an/a10.1002/inf2.12372A sound velocity method for determining isobaric specific heat capacityJun Pei0Hezhang Li1Hua‐Lu Zhuang2Jinfeng Dong3Bowen Cai4Haihua Hu5Jing‐Wei Li6Yilin Jiang7Bin Su8Li‐Dong Zhao9Jing‐Feng Li10State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering Tsinghua University Beijing People's Republic of ChinaNational Institute for Materials Science (NIMS) Tsukuba JapanState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering Tsinghua University Beijing People's Republic of ChinaState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering Tsinghua University Beijing People's Republic of ChinaState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering Tsinghua University Beijing People's Republic of ChinaState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering Tsinghua University Beijing People's Republic of ChinaState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering Tsinghua University Beijing People's Republic of ChinaState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering Tsinghua University Beijing People's Republic of ChinaState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering Tsinghua University Beijing People's Republic of ChinaSchool of Materials Science and Engineering Beihang University Beijing People's Republic of ChinaState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering Tsinghua University Beijing People's Republic of ChinaAbstract Isobaric specific heat capacity (Cp) is an important parameter not only in physics but also for most materials. Its accurate measurement is particularly critical for performance evaluation of thermoelectric materials, but the experiments by differential scanning calorimetry (DSC) often lead to large uncertainties in the measurements, especially at elevated temperatures. In this study, we propose a simple method to determine Cp by measuring the sound velocity (υ) based on lattice vibration and expansion theory. The relative standard error of the υ is smaller than 1%, showing good accuracy and repeatability. The calculated Cp at elevated temperature (>300 K) increases slightly with increasing temperature due to the lattice expansion, which is more reasonable than the Dulong–Petit value.https://doi.org/10.1002/inf2.12372heat capacitysound velocitythermoelectric |
| spellingShingle | Jun Pei Hezhang Li Hua‐Lu Zhuang Jinfeng Dong Bowen Cai Haihua Hu Jing‐Wei Li Yilin Jiang Bin Su Li‐Dong Zhao Jing‐Feng Li A sound velocity method for determining isobaric specific heat capacity InfoMat heat capacity sound velocity thermoelectric |
| title | A sound velocity method for determining isobaric specific heat capacity |
| title_full | A sound velocity method for determining isobaric specific heat capacity |
| title_fullStr | A sound velocity method for determining isobaric specific heat capacity |
| title_full_unstemmed | A sound velocity method for determining isobaric specific heat capacity |
| title_short | A sound velocity method for determining isobaric specific heat capacity |
| title_sort | sound velocity method for determining isobaric specific heat capacity |
| topic | heat capacity sound velocity thermoelectric |
| url | https://doi.org/10.1002/inf2.12372 |
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