Abstract—
Ceramics consisting of anhydrous calcium sulfate, CaSO4, after firing in the range 800–1000°C have been prepared from calcium sulfate dihydrate (CaSO4⋅2H2O) powder synthesized using aqueous 1 M calcium nitrate (Ca(NO3)2) and ammonium sulfate ((NH4)2SO4) solutions. In the preparation of the powder, the precipitate was washed four times with distilled water to remove ammonium nitrate, NH4NO3, a reaction by-product and, after drying, the powder was disaggregated in acetone. The synthesized CaSO4⋅2H2O powder particles had an elongated prismatic shape both before and after disaggregation. After firing at 800, 900, and 1000°C, the microstructure of the ceramics based on the synthesized CaSO4⋅2H2O powder free of reaction by-products contained sintered elongated polycrystalline structures, confirming that the ceramics inherited the microstructure of the starting powder. Ceramics consisting of anhydrous calcium sulfate, CaSO4, can be recommended for the fabrication of implants for bone tissue defect repair by regenerative medicine methods because they are biocompatible and bioresorbable.
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ACKNOWLEDGMENTS
In this study, we used equipment purchased through the Development of Moscow State University Program.
Funding
This work was supported by the Russian Foundation for Basic Research (grant no. 20-03-00550) and the Russian Federation President’s Grants Council (Support to the Russian Federation Leading Scientific Schools Program, grant no. NSh-2726.2020.3).
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Safronova, T.V., Belokozenko, M.A., Yahyoev, S.O. et al. Ceramics Based on CaSO4⋅2H2O Powder Synthesized from Ca(NO3)2 and (NH4)2SO4. Inorg Mater 57, 867–873 (2021). https://doi.org/10.1134/S0020168521080112
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DOI: https://doi.org/10.1134/S0020168521080112