1. Ceramics Based on Sodium Rhenanite CaNaPO 4 , Obtained via Firing of Composite Cement-Salt Stone.
- Author
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Toshev, Otabek, Safronova, Tatiana, Kazakova, Gilyana, Shatalova, Tatiana, Boytsova, Olga, Lukina, Yulia, and Sivkov, Sergey
- Subjects
SODIUM phosphates ,SODIUM ,CALCIUM phosphate ,COMPRESSIVE strength ,GRAIN size ,CERAMICS ,CERAMIC materials - Abstract
Ceramics based on rhenanite CaNaPO
4 with density of 0.94 g/cm3 and compressive strength of 10.3 MPa was obtained via firing at 900 °C of composite cement-salt stone prepared from a hardening powder mixture of calcium citrate tetrahydrate Ca3 (C6 H5 O7 )2 ∙4H2 O and sodium dihydrogen phosphate NaH2 PO4 . The phase composition of the obtained samples of cement–salt stone was represented by monetite CaHPO4 , unreacted sodium dihydrogen phosphate and calcium citrate tetrahydrate. According to the XRD data, the phase composition of the ceramic samples after annealing in the temperature range of 500–700 °C was mainly represented by the β-CaNaPO4 phase. It was found that after an annealing at temperature of 900 °C, the phase composition of ceramics was presented with the only phase of β-CaNaPO4 . It was demonstrated that an increase in the annealing temperature led to an increase in the grain size from 1 μm after annealing at 500 °C to 5 μm after annealing at 900 °C. Obtained ceramic material based on CaNaPO4 could be important for regenerative treatments of bone tissue defects. [ABSTRACT FROM AUTHOR]- Published
- 2022
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