A kinetic and mechanistic study into the transformation of calcium sulfate hemihydrate to dihydrate.

ABSTRACT: The conversion of CaSO₄·0.5H₂O to CaSO₄·2H₂O is of great importance industrially, being the reaction behind plasterboard production and the setting of medical plasters. A detailed kinetic and mechanistic study of this process was conducted using time-resolved synchrotron X-ray diffraction in this work. The CaSO₄·2H₂O product is very similar regardless of whether the α- or β-form of CaSO₄·0.5H₂O is used as the starting material, but the reaction process is very different. The induction time is usually shorter for α-CaSO₄·0.5H₂O than β-CaSO₄·0.5H₂O, and a greater conversion percentage is observed with the former (although in neither case does the reaction procee

SUBMITTER: Gurgul SJ 

PROVIDER: S-EPMC6510200 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature