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Study of gypsum by PDSC

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Abstract

Calcium sulfate dihydrate has been widely characterized by both differential scanning calorimetry and thermogravimetry (TG). Two dehydration processes were reported to be partially overlapping. High resolution TG and water vapor self generated atmosphere pin-hole lid strategies were used to increase the resolution of both dehydration processes. In this study, isobaric experiments were carried out in a pressure differential scanning calorimetry cell. The approach consisted in combining the pin-hole lid with different pressures with nitrogen atmosphere. Resolution was improved at moderately low pressures. At higher pressures other processes were observed.

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Acknowledgements

This study was partially funded by the Spanish Ministerio de Educacion y Ciencia MTM2008-00166 and MAT2010-21342-C02-01.

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Authors and Affiliations

  1. Higher Polytechnic School, Campus de Esteiro, University of A Coruña, 15403, Ferrol, Spain

    Jorge López-Beceiro & Ramón Artiaga

  2. Thermal Analysis, Rheology and Microcalorimetry Applications, TA Instruments—Waters Cromatografía, S.A. Avda. Europa, 21 Parque Empresarial La Moraleja, 28108, Alcobendas, Madrid, Spain

    Carlos Gracia-Fernández

  3. Faculty of Business and Economics, Campus de Elviña, University of A Coruña, 15071, A Coruña, Spain

    Javier Tarrío-Saavedra

  4. Department of Applied Physics, CESUGA, University College of Dublin, Feáns 152, 15190, A Coruña, Spain

    Silvia Gómez-Barreiro

Authors
  1. Jorge López-Beceiro
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  2. Carlos Gracia-Fernández
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  3. Javier Tarrío-Saavedra
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  4. Silvia Gómez-Barreiro
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  5. Ramón Artiaga
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Corresponding author

Correspondence to Ramón Artiaga.

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López-Beceiro, J., Gracia-Fernández, C., Tarrío-Saavedra, J. et al. Study of gypsum by PDSC. J Therm Anal Calorim 109, 1177–1183 (2012). https://doi.org/10.1007/s10973-012-2335-1

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  • DOI: https://doi.org/10.1007/s10973-012-2335-1

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