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Temperature changes within samples in heat conduction calorimeters

In English

Författare

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.

Publiceringsår

2000

Språk

Engelska

Sidor

121-127

Publikation/Tidskrift/Serie

Thermochimica Acta

Volym

366

Issue

2

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Materials Engineering

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0040-6031