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Studies on preparation and adaptive thermal control performance of novel PTC (positive temperature coefficient) materials with controllable Curie temperatures

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  • Cheng, Wen-long
  • Yuan, Shuai
  • Song, Jia-liang

Abstract

PTC (positive temperature coefficient) material is a kind of thermo-sensitive material. In this study, a series of novel PTC materials adapted to thermal control of electron devices are prepared. By adding different low-melting-point blend matrixes into GP (graphite powder)/LDPE (low density polyethylene) composite, the Curie temperatures are adjusted to 9 °C, 25 °C, 34 °C and 41 °C, and the resistance–temperature coefficients are enhanced to 1.57/°C–2.15/°C. These PTC materials remain solid in the temperature region of PTC effect, which makes it possible to be used as heating element to achieve adaptive temperature control. In addition, the adaptive thermal control performances of this kind of materials are investigated both experimentally and theoretically. The result shows that the adaptive effect becomes more significant while the resistance–temperature coefficient increases. A critical heating power defined as the initial heating power which makes the equilibrium temperature reach terminal temperature is presented. The adaptive temperature control will be effective only if the initial power is below this value. The critical heating power is determined by the Curie temperature and resistance–temperature coefficient of PTC materials, and a higher Curie temperature or resistance–temperature coefficient will lead to a larger critical heating power.

Suggested Citation

  • Cheng, Wen-long & Yuan, Shuai & Song, Jia-liang, 2014. "Studies on preparation and adaptive thermal control performance of novel PTC (positive temperature coefficient) materials with controllable Curie temperatures," Energy, Elsevier, vol. 74(C), pages 447-454.
    • Handle: RePEc:eee:energy:v:74:y:2014:i:c:p:447-454
    DOI: 10.1016/j.energy.2014.07.009
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    References listed on IDEAS

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    1. Wang, Yi-Hsien & Yang, Yue-Tzu, 2011. "Three-dimensional transient cooling simulations of a portable electronic device using PCM (phase change materials) in multi-fin heat sink," Energy, Elsevier, vol. 36(8), pages 5214-5224.
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    Cited by:

    1. Yoon Hyuk Shin & Seung Ku Ahn & Sung Chul Kim, 2016. "Performance Characteristics of PTC Elements for an Electric Vehicle Heating System," Energies, MDPI, vol. 9(10), pages 1-9, October.

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