Ceramics Based on Sodium Rhenanite CaNaPO4, Obtained via Firing of Composite Cement-Salt Stone

Ceramics based on rhenanite CaNaPO4 with density of 0.94 g/cm3 and compressive strength 10.3 MPa was obtained via firing at 900 °C composite cement-salt stone prepared from a hardening powder mixture calcium citrate tetrahydrate Ca3(C6H5O7)2∙4H2O sodium dihydrogen phosphate NaH2PO4. The phase composition the samples cement–salt represented by monetite CaHPO4, unreacted tetrahydrate. According to XRD data, ceramic after annealing in temperature range 500–700 mainly β-CaNaPO4 phase. It found that an °C, ceramics presented only β-CaNaPO4. demonstrated increase led grain size 1 μm 500 5 °C. Obtained material could be important for regenerative treatments bone tissue defects.