Superconductor samples with the chemical composition Bi2-xAgxBa2-ySryCa2Cu3O10+δ were synthesized using solid-state technology and the effect of partial substitution of Sr (y=0, 0.1, 0.2, 0.3, 0.4) and Ag (x=0, 0.2) on their electrical and structural properties was investigated. X-ray diffraction analysis showed that all samples have the tetragonal crystal structure with the largest lattice constant (c) at x = 0.2 and y = 0.1. Electrical resistance measurements using the four-probe method showed the critical temperatures Tc(1)=127.5 K and Tc(2)=152.7 K (Tc) for the pure sample (x=0, y=0). When introducing Ag and Sr in the optimal concentration ratio (x=0.2, y=0.1), the Tc values increased significantly reaching Tc(1)=139.2 K and Tc(2)=170.5 K. This is explained by the regularization of the crystal structure, as evidenced by the increase in the c-axis length and the oxygen percentage (δ). However, as the Sr concentration ratio further increased (from x=0.2, y=0.2 to x=0.2, y=0.4), the Tc values tended to decrease, with the lowest values being Tc(1)=134.9 K and Tc(2)=163.2 K at (x=0.2, y=0.4). This decrease was attributed to the introduction of Cu-O impurities, which disrupted the crystal structure. Overall, the study identified the concentration ratio (x=0.2, y=0.1) as the most favorable for achieving the highest Tc, confirming its potential for improving the superconducting properties of the material. The samples were classified as type II superconductors.

It has been shown that during electrolytic hydrogenation of wire samples of the Zr1Nb alloy, a layer of 9.5 μm thick anisotropic zirconium hydride nanocrystals with a thickness of ≈9.5 µm is formed on the surface, which leads to a decrease in the shear modulus by 10% in pre-annealed samples and to a significantly reduced effect in deformed ones. The latter is a consequence of the competition of two factors: a decrease in modulus due to the direct formation of the δ hydride ZrH1.66 and an increase due to the relaxation of internal stresses. The observed effect of a decrease in the electrical resistivity of a wire sample as a result of hydrogenation is discussed.

This work develops a numerical model for analyzing the growth conditions of Cd0.9Zn0.1Te crystals by the traveling heater method (THM) in a multi-zone electrodynamics gradient (EDG) furnace. The main focus is on determining the temperature profile and the thickness of the Te-rich solution to improve the structural homogeneity of the crystals and minimize defects. The work also proposes a dimensionless criterion based on the ratio of the thermal Rayleigh number (RaT) to the concentration Rayleigh number (RaC), which allows for evaluating the growth conditions. The calculations performed make it possible to determine the main technological parameters that ensure a nearly flat crystallization interface. The adequacy of the calculated thermal conditions was confirmed experimentally. The obtained samples showed characteristics suitable for manufacturing spectroscopic grade detectors.

Reflective filaments were developed based on polycarbonate with the addition of 10-20 wt.% finely dispersed polytetrafluoroethylene (PTFE) powder and 5-15 wt.% titanium dioxide (TiO2) pigment. The manufactured materials can be used to obtain reflectors by 3D printing for use in scintillation technology, in particular as part of finely segmented plastic scintillators. The produced reflective layers have a reflection coefficient of up to 90% and a transmission coefficient of about 0.2% at the wavelength of the maximum emission of polystyrene-based plastic scintillator. Technical approaches to the production of scintillation elements with a reflector using additive technologies are also considered.