Cell asymmetry correction for temperature modulated differential scanning calorimetry

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Description

The quality of measurement of heat capacity by differential scanning calorimetry (DSC) is based on strict symmetry of the twin calorimeter, which is important for temperature-modulated DSC. Heat capacities for sapphire-filled and empty aluminium calorimeters (pans) under designed cell imbalance caused by different pan-masses were measured. In addition, positive and negative signs of asymmetry were explored by analyzing the phase-shift between temperature and heat flow for sapphire and empty runs. The phase shifts change by more than 18{degree} depending on asymmetry sign. Once the asymmetry sign is determined, the asymmetry correction for modulated DSC can be made.

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20 p.

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Ishikiriyama, K. & Wunderlich, B. December 31, 1996.

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Description

The quality of measurement of heat capacity by differential scanning calorimetry (DSC) is based on strict symmetry of the twin calorimeter, which is important for temperature-modulated DSC. Heat capacities for sapphire-filled and empty aluminium calorimeters (pans) under designed cell imbalance caused by different pan-masses were measured. In addition, positive and negative signs of asymmetry were explored by analyzing the phase-shift between temperature and heat flow for sapphire and empty runs. The phase shifts change by more than 18{degree} depending on asymmetry sign. Once the asymmetry sign is determined, the asymmetry correction for modulated DSC can be made.

Physical Description

20 p.

Notes

OSTI as DE97001295

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  • 11. international congress on thermal analysis and calorimetry, Philadelphia, PA (United States), 12-16 Aug 1996

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  • Other: DE97001295
  • Report No.: CONF-960826--3
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 434325
  • Archival Resource Key: ark:/67531/metadc684405

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  • December 31, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Jan. 25, 2016, 6:52 p.m.

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Ishikiriyama, K. & Wunderlich, B. Cell asymmetry correction for temperature modulated differential scanning calorimetry, article, December 31, 1996; Tennessee. (digital.library.unt.edu/ark:/67531/metadc684405/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.