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Temperature changes within samples in heat conduction calorimeters

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Author

Summary, in English

So-called isothermal calorimeters are often built on the heat conduction principle. This may sound as a contradiction, as heat conduction is a result of non-isothermal conditions, but most measurements with microcalorimeters and other such instruments are essentially isothermal as the temperature differences within the instruments are in the order of 10 mK. This paper presents simple methods to estimate the temperature changes within a sample in a heat conduction calorimeter during a measurement. It also shows that the determination of activation energy is normally not disturbed by these small temperature changes. In addition to the heat production rate in the sample, the thermal properties of the sample and the calorimeter are needed as input to the calculations.

Publishing year

2000

Language

English

Pages

121-127

Publication/Series

Thermochimica Acta

Volume

366

Issue

2

Document type

Journal article

Publisher

Elsevier

Topic

  • Materials Engineering

Status

Published

ISBN/ISSN/Other

  • ISSN: 0040-6031