Ceramics Based on CaSO4⋅2H2O Powder Synthesized from Ca(NO3)2 and (NH4)2SO4

• Published in: Inorganic materials 2021-08, Vol.57 (8), p.867-873
• Main Authors: Safronova, T. V., Belokozenko, M. A., Yahyoev, Sh. O., Shatalova, T. B., Kazakova, G. K., Peranidze, K. Kh, Toshev, O. U., Khasanova, S. S.
• Format: Article
• Language: English
• Subjects: Ammonium nitrate; Ammonium sulfate; Biocompatibility; Biomedical materials; Byproducts; Calcium nitrate; Calcium sulfate; Calcium sulfate dihydrate; Ceramic powders; Ceramics; Chemistry; Chemistry and Materials Science; Distilled water; Elongated structure; Industrial Chemistry/Chemical Engineering; Inorganic Chemistry; Materials Science; Microstructure; Nitrates; Sintering (powder metallurgy); Tissue engineering
• ISSN: 0020-1685; 1608-3172
• DOI: 10.1134/S0020168521080112

— Ceramics consisting of anhydrous calcium sulfate, CaSO 4 , after firing in the range 800–1000°C have been prepared from calcium sulfate dihydrate (CaSO 4 ⋅2H 2 O) powder synthesized using aqueous 1 M calcium nitrate (Ca(NO 3 ) 2 ) and ammonium sulfate ((NH 4 ) 2 SO 4 ) solutions. In the preparation of the powder, the precipitate was washed four times with distilled water to remove ammonium nitrate, NH 4 NO 3 , a reaction by-product and, after drying, the powder was disaggregated in acetone. The synthesized CaSO 4 ⋅2H 2 O 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 CaSO 4 ⋅2H 2 O 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, CaSO 4 , can be recommended for the fabrication of implants for bone tissue defect repair by regenerative medicine methods because they are biocompatible and bioresorbable.