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  Critical review of small sample calorimetry: improvement by auto-adaptive thermal shield control

Schnelle, W., & Gmelin, E. (2002). Critical review of small sample calorimetry: improvement by auto-adaptive thermal shield control. Thermochimica Acta, 391(1-2), 41-49. doi:10.1016/S0040-6031(02)00162-4.

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 Creators:
Schnelle, W.1, Author              
Gmelin, E.2, Author              
Affiliations:
1Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
2Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              

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Free keywords: heat capacity measurement; adiabatic calorimetry; low temperature calorimetry
 Abstract: The paper reviews measuring and data computation procedures in heat-step calorimetry, for small samples (<100 mg mass) and at low temperatures (T < 100 K) under semi-adiabatic (isoperibol) measuring condition. In conjunction with an auto-adaptive heat- shield control, a method is described how the heat losses, occurring during an isoperibol measuring cycle, are correctly taken into account in order to achieve an absolute uncertainty of C-p of 1% or lower. The basic features of the method are strictly adiabatic condition at the beginning of each heat capacity measuring point, achieved by an extremely small temperature drift of the sample, and a very constant temperature of the heat-shield during the whole measuring cycle. (C) 2002 Elsevier Science B.V. All rights reserved.

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Language(s): eng - English
 Dates: 2002-08-12
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 18228
ISI: 000177468500007
DOI: 10.1016/S0040-6031(02)00162-4
 Degree: -

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Title: Thermochimica Acta
  Alternative Title : Thermochim. Acta
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 391 (1-2) Sequence Number: - Start / End Page: 41 - 49 Identifier: ISSN: 0040-6031