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Study of gypsum by PDSC |
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| Authors: | Jorge López-Beceiro Carlos Gracia-Fernández Javier Tarrío-Saavedra Silvia Gómez-Barreiro Ramón Artiaga |
| Affiliation: | 1. Higher Polytechnic School, Campus de Esteiro, University of A Coru?a, 15403, Ferrol, Spain 2. Thermal Analysis, Rheology and Microcalorimetry Applications, TA Instruments??Waters Cromatograf??a, S.A. Avda. Europa, 21 Parque Empresarial La Moraleja, 28108, Alcobendas, Madrid, Spain 3. Faculty of Business and Economics, Campus de Elvi?a, University of A Coru?a, 15071, A Coru?a, Spain 4. Department of Applied Physics, CESUGA, University College of Dublin, Fe??ns 152, 15190, A Coru?a, Spain |
| 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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