Hydration Ability of Hemihydrate Calcium Sulphate Whiskers with Different Content of Sodium Phosphate

Abstract:

Different content of sodium phosphate was added into the hemihydrates sulphate whiskers for 30 min to 2h of standing time. The treated products were researched by SEM, TG-DSC and XRD. The results indicate that when the dosage of sodium phosphate was more than 0.10%, the morphology of hemihydrate calcium sulphate whisker was fully maintained. However, the crystal structure of the products had changed and the half water calcium sulfate turned into of dihydrate calcium sulphate when 0.10 wt% sodium phosphate added. With the increase of standing time, half water calcium sulfate whisker converted into dihydrate calcium sulphate whisker. Sodium phosphate could reduce hydration ability of half water calcium sulfate whisker when the content of sodium phosphate was more than 0.10%.

• Periodical: Applied Mechanics and Materials (Volumes 638-640)
• Pages: 1346-1349
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.638-640.1346
• Online since: September 2014
• Authors: Chang Chen*, Yu Bin Wang, Le Yu, Ying Jie Song, Shan Shan Zhang, Ai Zhang
• Keywords: Calcium Sulfate Whisker, Hydration, Sodium Phosphate

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