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Thermal Gradients in Thermal Analysis Experiments

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Thermal Physics and Thermal Analysis

Part of the book series: Hot Topics in Thermal Analysis and Calorimetry ((HTTC,volume 11))

Abstract

The concept of “sample temperature” in non-isothermal thermal analysis experiments is analyzed. From the analysis of the heat balance inside the sample, it is shown that the existence of such sample temperature is restricted to experimental conditions, where the thermal gradients are negligible. Two different sources of thermal gradients are studied: the sample thermal inertia and the heat of reaction that is not quickly removed. The conditions to prevent the formation of thermal gradients as well as the condition for a thermal runaway to occur are deduced. Finally, it is shown that the aspect ratio is a crucial parameter for the formation of thermal gradients within the sample.

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Acknowledgements

This work has been funded by the Spanish Programa Nacional de Materiales through project MAT2014-51778-C2-2-R and by the Generalitat de Catalunya contract No. 2014SGR-00948.

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Authors and Affiliations

  1. University of Girona, Campus Montilivi Edif. PII, E17071, Girona, Catalonia, Spain

    Jordi Farjas, Daniel Sánchez-Rodriguez, Hichem Eloussifi & Pere Roura

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  1. Jordi Farjas
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  2. Daniel Sánchez-Rodriguez
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  3. Hichem Eloussifi
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  4. Pere Roura
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Correspondence to Jordi Farjas .

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Editors and Affiliations

  1. New Technologies (NTC-ZČU) Research Centre of the Westbohemian Region, University of West Bohemia, Plzeň, Czech Republic

    Jaroslav Šesták

  2. Division of Solid-State Physics, Czech Academy of Sciences, Institute of Physics, Praha , Czech Republic

    Pavel Hubík

  3. Division of Solid-State Physics, Czech Academy of Sciences, Institute of Physics, Praha, Czech Republic

    Jiří J. Mareš

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Farjas, J., Sánchez-Rodriguez, D., Eloussifi, H., Roura, P. (2017). Thermal Gradients in Thermal Analysis Experiments. In: Šesták, J., Hubík, P., Mareš, J. (eds) Thermal Physics and Thermal Analysis. Hot Topics in Thermal Analysis and Calorimetry, vol 11. Springer, Cham. https://doi.org/10.1007/978-3-319-45899-1_16

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