Synthesis from mixed-anionic aqueous solutions is a novel approach to obtain active powders for bioceramics production in the CaO-SiO₂-P₂O₅-Na₂O system. In this work, powders were prepared using precipitation from aqueous solutions of the following precursors: Ca(NO₃)₂ and Na₂HPO₄ (CaP); Ca(NO₃)₂ and Na₂SiO₃ (CaSi); and Ca(NO₃)₂, Na₂HPO₄ and Na₂SiO₃ (CaPSi). Phase composition of the CaP powder included brushite CaHPO₄‧2H₂O and the CaSi powder included calcium silicate hydrate. Phase composition of the CaPSi powder consisted of the amorphous phase (presumably containing hydrated quasi-amorphous calcium phosphate and calcium silicate phase). All synthesized powders contained NaNO₃ as a by-product. The total weight loss after heating up to 1000 °C for the CaP sample—28.3%, for the CaSi sample—38.8% and for the CaPSi sample was 29%. Phase composition of the ceramic samples after the heat treatment at 1000 °C based on the CaP powder contained β-NaCaPO₄ and β-Ca₂P₂O₇, the ceramic samples based on the CaSi powder contained α-CaSiO₃ and Na₂Ca₂Si₂O₇, while the ceramics obtained from the CaPSi powder contained sodium rhenanite β-NaCaPO₄, wollastonite α-CaSiO₃ and Na₃Ca₆(PO₄)₅. The densest ceramic sample was obtained in CaO-SiO₂-P₂O₅-Na₂O system at 900 °C from the CaP powder (ρ = 2.53 g/cm³), while the other samples had densities of 0.93 g/cm³ (CaSi) and 1.22 (CaPSi) at the same temperature. The ceramics prepared in this system contain biocompatible and bioresorbable phases, and can be recommended for use in medicine for bone-defect treatment.

Perovskite photodetectors were found to exhibit high responsivity of up to 0.45 A W−1 under low-intensity light irradiation from 4 × 10−9 to 3 × 10−7 W cm−2 (equivalent to 4 × 10−8 to 3 × 10−6 suns). The feasibility of using perovskite-based photodetectors in combination with a scintillator as an indirect X-ray detector with a sensitivity of 75.5 μC Gy−1 cm−2 was demonstrated.