erratum

Abstract— When water diffuses into silica glass it reacts chemically forming nanometre sized pores that change the physical properties of the glass, for example, affect its strength. Here we discuss the effect of water on Young’s modulus, and show how it is reduced by the water reaction, whereby a proportional behaviour applies to small amounts of water involved in the reaction. The value of the elastic

Abstract The surface of amorphous SiO2 samples, which receives various doses of implantation by Ar+ ions with an energy of 40 keV, undergo a point shock impact. The kinetics of the accumulation of microcracks are investigated using the acoustic emission method. The square of the amplitude of the acoustic emission pulse appears to be proportional to the energy released during the formation of a microcrack

Abstract The results are presented on studies of the content of Lewis and Brønsted centers on the internal surface of high-silica porous glass (PG) obtained by the through chemical etching of alkali-borosilicate glass with the two-frame structure, including the one modified by an isothermal treatment in an electric furnace in air in the temperature range from 120 to 750°C. The content of the active

Abstract— In this article, we first calculate gamma-ray exposure buildup-factors of some radiation-resistant glasses and radiation-protective glasses by using the Geometric Progression (G-P) fitting method. And then we analyze variations of the exposure buildup-factor with the incident photon energy and penetration depth. The results show that exposure buildup-factors strongly associate with photon

Abstract The diffusion coefficients of Li+ and Na+ ions in glass and glass-forming melts of lithium and sodium niobium phosphates, which are in satisfactory agreement with the experimental data available in the literature, are obtained by the molecular dynamics method. The nonlinear change in the migration parameters (manifestation of the mixed alkali effect) is confirmed at the equivalent replacement

Abstract The geometric and topological analyses of the K44In80-hR366 (space group R\(\bar {3},\) a = b = 17.214 Å, c = 44.612 Å) and K34In82-cF464 (space group Fd\(\bar {3}\)m, a = 24.241 Å, V= 14244.64 Å3) crystal structures are implemented by computer-based methods (ToposPro program). The framework-forming 142-atom icosahedral nanocluster K142 is determined by the method of the complete decomposition

Abstract— The effect of the treatment of borosilicate glass with hydrofluoric acid (HF), Caro’s acid, and concentrated hydrogen peroxide solution on their hydrophilic-hydrophobic properties and surface morphology is studied by the method of the measurement of the contact angle and calculation of the total, polar, and dispersion parts of the surface energy. It is shown that the most significant and

Abstract— The electron paramagnetic resonance (EPR) parameters (g-factors g//, g⊥ and the hyperfine structure constants A//, A⊥) and local structure are theoretically investigated for Cu2+-doped oxyfluoroborate (20Li2O–10Li2F2–70B2O3) glasses based on the three-order perturbation formulas for an octahedral 3d9 cluster with tetragonal elongation distortion. In these formulas, the ligand orbital and

Abstract This paper proposes ideas based on triply periodic surfaces of the minimum energy. A large number of structures can be described by a limited number of minimal surfaces. There is a certain connection between the symmetry of the surfaces, space groups, and structures.

Abstract Single-phase nanocrystalline (18–20 nm) lanthanum indate powder (LaInO3) and neodymium indate powder (NdInO3) with the structure of orthorhombic perovskite are synthesized by the coprecipitation of hydroxides with the simultaneous ultrasonic treatment of the precipitation and subsequent firing of the powder-precursors at a temperature of 700°C. Ceramic samples with an open porosity of 4 to

Abstract A number of new solid solutions Ca3 − 1.5xErx□0.5xB2SiO8 (x = 0–0.4) based on borosilicate Ca3B2SiO8 are synthesized: homogeneous solid solutions with х = 0–0.125 are structurally similar to the low-temperature monoclinic polymorphic modification of β-Сa3B2SiO8; and at 0.16 < х < 0.25, to the high-temperature orthorhombic polymorph α-Сa3B2SiO8. High-temperature X-ray powder diffraction and

Abstract B2O3–ZnO–Na2O–Li2O (BZNL) based glasses containing silver nano particles (Ag NPs) were prepared by melt-quenching technique. Four reducing agents such as Bi2O3, As2O3, Sb2O3, SnO were separately used to reduce Ag+ ions into Ago atoms in the form of nano particles. The glasses were characterized by XRD, FTIR, DSC, Optical absorption and Raman spectroscopy. The amorphous nature of the prepared

AbstractGlass composed of (Ga2S3)0.60(La2S3)0.35(Er2S3)0.05 and (Ga2S3)0.60(La2S3)0.27(Er2S3)0.13 is synthesized. It is found that glass composed of (Ga2S3)0.60(La2S3)0.35(Er2S3)0.05 softens during its thermal decomposition of in air at 855 K. In the range 945–1210 K, an exothermic effect is observed. The nature of the thermal curves indicates the stage mechanism of glass decomposition. IT is revealed

AbstractThe electrical resistance of graphite samples with coatings based on Si–B–ZrB2 with different binders and coating components in the temperature range 20–1000°C is determined.

AbstractA cold hardened organosilicate material for coatings with improved decontamination is developed, which obviates the need for an additional varnish layer on its surface. In terms of its physical and mechanical characteristics and heat resistance (300°C), this coating is not inferior to the currently used OS-51-03 coating.

AbstractSingle crystal studies of the Li2B4O7 borate in a wide temperature range are performed. The studies confirm the smoothed nature of the temperature dependences of the c cell parameter and do not reveal any modulated phases at low temperature.

AbstractThe processes of lithization and delithization of a perfect and defective (containing monovacancies) silicene channel located on an Ni(111) substrate are studied in a molecular-dynamic (MD) experiment. It is shown that such a system can exist up to 1 ns in time without destruction. The limiting amount of lithium ions intercalated into the silicene channel modified by monovacancies is 20% higher

AbstractThe density of glass with a composition of 20Na2O ∙ 80B2O3 (mol %) (glass transition temperature Tg = 450°С) during stabilization in the temperature range 390−424°С and the temperature dependence of the density of the stabilized glass in the range 390–469°С are studied. We aim to study the temperature dependence of the density of stabilized glass ds lower than the glass transition temperature

AbstractFine alpha-alumina (α-Al2O3) powder was prepared by simple precipitation technique using aluminium salt and ammonia as a precipitating agent. In this method, an aqueous solution of aluminium nitrate and ammonia were mixed with continuous stirring both in the presence and in the absence of polyethylene glycol (PEG). A controlled pH range of 7.5–8.5 was maintained throughout the synthesis process

AbstractThe combinatorial-topological analysis and simulation of self-assembly of the Na96Hg36-hR132 (space group R-3c, a = b = 9.228 Å, c = 52.6380 Å, V = 3881.91 Å3) and Na12Hg8-tP20 (space group P42/mnm, a = b = 8.520, c = 7.800 Å, V = 566.2 Å3) crystal structures are conducted by computer-based methods (ToposPro program package). Polyhedral cluster precursors K11 = 0@11(Na8Hg3) and K9 = Hg@Na8

AbstractIn a microreactor with colliding jets using solutions of titanium tetraisopropylate and water in isopropyl alcohol, a number of titanium dioxide powders are obtained. It is shown that an additional heat treatment of samples up to 350°C for 30 min is sufficient for the formation of the anatase phase. The developed method allows synthesis in a short time, provides low energy consumption, does

AbstractThe ion-exchange interaction of potassium iron-silicate glass with lithium nitrate melt is studied. It is established that a magnetic matrix with polymodal pore size distribution in the range of 1 nm to 10 μm is formed. No diffusion kinetics are detected in the interaction of glass with the salt melts. It is determined that the thermal history of the glass affects the composition of the phases

AbstractBismuth-containing composite materials based on high-silica porous glasses (PGs) of various types are prepared. Their structural parameters and electrokinetic potential in 10–2 М KNO3 solutions in the pH range 1.5–8.5 are studied. The results are compared with the analogous properties of matrices not modified with bismuth oxide, as well as the pH dependence of the zeta-potential for SiO2 particles

AbstractChalcogenide glasses are attracting interest nowadays due to their various technological applications like telecommunications, computer memories, chemical, and ionic sensors, writing channel waveguides and photo-detectors. These glasses possess large transmission in middle, far and near spectral region. Se–Te alloys have created extreme interest due to their greater hardness, lower aging effect

AbstractIn this work, the effect of the methods of synthesis on the phase composition and photocatalytic properties of composites formed in the section of (SrO)0.2(Bi2O3)0.8–BiFeO3 is studied on the examples of the decomposition reactions of methylene orange (MO). The studied compositions have the MO degradation degree ranging from 30 to 62% (C0 = 20 mg/L, catalyst loading of 30 mmol/L) under irradiation

AbstractUsing computer methods (the ToposPro software package), the combinatorial-topological analysis and modeling of the self-assembly of the Na99Hg468–hP567 crystal structure are carried out with the following parameters of the hexagonal cell: a = b = 39.703 Å, c = 9.681 Å, V = 13216 Å3, space group P-6, and 132 crystallographically independent atoms. Three supracluster precursors K175-A, K175-B

AbstractUsing computer methods (the ToposPro software package), the combinatorial-topological analysis and modeling of the self-assembly of the K23Na8Cd12In48–hP91(a = b = 17.114 Å, c = 10.442 Å, group P6/mmm) crystal structure are carried out. The chemically different precursor clusters 0@8(Na2In6) and 0@K2In6 in the form of hexagonal bipyramids are established. The centers of Na2In6 clusters occupy

AbstractThe fundamental principles for the synthesis of a new class of materials with a controlled (periodic) interconnected structure based on triply periodic minimal surfaces are formulated. The chemical synthesis based on the reaction-diffusion Turing reaction, which enables us to fabricate periodic microstructures, is analyzed.

AbstractThe research of the hydrolytic polycondensation kinetics of tetraethoxysilane (TEOS) is required in order to understand the sol-gel synthesis processes and identify the factors determining the direction of these processes. An extensive analysis of these problems permits us to predict appropriate ways for the synthesis of new substances with the predetermined properties. Studying the kinetics

AbstractBased on the mass spectrometric study of chalcogenide and fullerene-chalcogenide glass (CG), as well as amorphous and crystalline carbon nitrides with general formula CnNm, which are similar to CG, are considered according to the type of chemical bond, their vapor composition, and the effect of the initial specimens of the synthesized materials, including those containing metal components,

AbstractThe spectra of the optical density and luminescence and dielectric spectra of crystalline nanoparticles (NPs), as well as micro- and nanodendrites of zinc and tin oxides in silicate nanoporous glass (NPG) with the average pore size of 25 nm, are presented. Oxide nanoparticles were synthesized in the bulk of nanoporous glass by the method of thermodissociation of zinc and tin salts. Oxide nanodendrites

AbstractGlass samples with formula as Li2O–BaO–GdF3–SiO2:Sm2O3 were fabricated by melt quenching method. Their optical, physical and luminescence properties were studied, for their potential applications in photonic device working in visible region. The Sm3+ ions and nearby ligands bonding nature were determined from bonding parameters (δ) that in turn were calculated from LGF absorption spectra. Oscillator

Abstract—The amorphous glassy alloys Se82 – xTe18Gex (x = 0, 4, 8, 12, at %) was synthesized using melt quench technique. Thermal stability was examined with the help of various parameters such as Dietzal parameter, Hruby parameter, Saad and Poulin and Lu and Liu parameters. Vicker hardness was obtained from Vicker hardness tester and other related thermo-mechanical properties such as volume of micro-voids

Abstract—An opportunity to operate by laser-induced nonlinear optical efficiencies of Ga2S3–La2S3 glasses doped with Er3+ and La3+ ions in the visible and near-infrared spectral ranges was explored. The laser-stimulated nonlinear optical properties were studied. The observed laser power and temperature dependences of the laser-stimulated second-harmonic generation and third-harmonic generation confirm

AbstractThe glasses of samarium (0.1, 0.2, 0.5, 1.0, 1.5 and 2.0 mol %) doped lithium strontium borate samples were synthesized. The physical and optical properties are studied at ambient conditions and discussed in this study. XRD spectra reveals the no atomic order in structure (amorphous) present in these glasses. Infrared spectroscopic study reveals the structural units of borate viz., BO3 and

AbstractThe physicochemical properties of glasses in the 50SrO · 50B2O3–50SrO · 50SiO2 join (mol %), such as density, microhardness, thermal expansion, and glass-transition temperature, are studied. Comparison with the characteristics of strontium-borosilicate glasses in other join with the constant strontium oxide content shows that the molar volume increases with an increase in the concentration

AbstractThe peculiarities of the nucleation of CuCl nanoparticles at the heating stage in sodium-aluminum-borosilicate glass are studied by the method of exciton-thermal analysis. It is found that the concentration of CuCl particles in this process reaches its maximum. The concentration of CuCl particles increases as the heating time increases, while the average radius decreases. The numerical simulation

AbstractThe aim of this study was to compare the effect of different immersion protocols into various acidic media on the surface roughness of various glass ionomer-based dental restorative materials in vitro. The total number of 200 specimens were prepared from 5 different restorative material groups. Ten specimens from each group were then immersed into one of the tested beverages including; Coca-Cola

AbstractIn this work, the influence of transition-metal ions doping on the zinc phosphate glass has been investigated. To do so, a series of glass doped with Ni2+, Cu2+and Co2+ at different ratio (1, 2 and 5 mol %) was synthesized. The Fourier transform infrared spectra was used to elucidate the bonding system of the constituent atoms. The dielectric and conductivity properties were studied by impedance

AbstractThis work describes the preparation of an organic-inorganic composite and the study of its characteristics. Particles of core (BaTiO3)–shell (SiO2–CoFe2O4) type were used as inorganic composite. These inorganic particles are used for the preparation of composites based on poly(vinyl alcohol) cyanoethyl ether synthesized in an external direct magnetic field. It is determined that the dielectric

AbstractIn this study, we compared the final core–shell products produced in the presence or absence of ultrasonic waves and evaluated the antibacterial properties of the core–shell. When ultrasonic wave was used, a complete core–shell structure with a silica shell coated on an individual core particle could be observed. Transmission electron microscopy and energy dispersive X-ray spectroscopy were

AbstractIn an inductively coupled high-frequency discharge plasma, SiCxNy:H films are obtained from a mixture of hexamethylcyclotrisilazane vapor and argon at substrate temperatures of 100 to 400°C and a discharge power of 200 W. The simplest plasma components (nitrogen, cyan, silicon atoms, CH free radicals, and C2 dimers) are determined. Some physicochemical properties of the films, including the

AbstractSpecimens composed of Zr0.95 – xY0.05O2:\({\text{Eu}}_{x}^{{3 + }}\) (x = 0.01–0.15) are synthesized in a muffle furnace and activated by thermal treatment in an electromagnetic field of the microwave range. The conditions for the activation and concentration of Eu3+ in phosphor are optimized. Microwave heat treatment results in the growth of grains, reduces microstresses, and increases the

AbstractImmobilization of europium ions in the Rho, Beta, and paulingite zeolites using ion exchange is studied in order to search for the optimal alumosilicate matrix for the development of solid-state radioluminescent light sources. The phase composition, thermal stability, moisture adsorption ability, and spectral characteristics of the specimens are studied. It is determined that Beta zeolite possesses

AbstractThe paper studies the properties of triply periodic minimal surface corundum products of the Schwarz primitive topology printed on different 3D printers. The possibility of an alternative technology, 3D plastic mold slip casting, is considered.

AbstractA strong highly porous ceramic for endoprosthesis possessing open porosity and elasticity modulus values similar to those of bone tissue is prepared through the solid-phase sintering of specimens of the initial powders of the (ZrO2)0.97(Y2O3)0.03 and [(ZrO2)0.97(Y2O3)0.03]0.8(Al2O3)0.2 compositions with blowing agents. The dependence of the characteristics of the sintered ceramics on the composition

AbstractIn order to study the deformation and fracture mechanism of machinable mica glass ceramics under different loading modes, quasi-static uniaxial tensile and compression experiments are designed and analyzed based on the obtained quasi-static stress-strain curves at different strain rates, the macroscopic and microscopic fracture morphology of the samples and the nano-indentation experiment.

AbstractCeramic matrix composites for solidification and disposal of actinide-rare-earth fraction of high-level waste (HLW) were prepared by sintering of nanosized powders of 0.8LaPO4–0.2Al2O3, 0.8LaPO4–0.2Y2O3 and 0.8LaPO4–0.2ZrO2 obtained from 0.8LaPO4 · nH2O–0.2Al(OH)3, 0.8LaPO4 · nH2O–0.2Y(OH)3 and 0.8L-aPO4 · nH2O–0.2ZrO(OH)2 precursors. These powders-precursors were synthesized via sol-gel technique

AbstractThis paper describes the conditions and results of ceramics sintering from “core-shell” corundum powders. Sintered ceramics phase composition, structure and mechanical properties were studied.

AbstractThe aim of this work is to investigate the solubility enhancement of ibuprofen by formation of stable amorphous ternary system (ibuprofen, polyvinylpyrrolidon, β-cyclodextrin) compared to the binary system (ibuprofen, β-cyclodextrin). Ibuprofen was co-milled at ambient temperature in presence of PVP K30 and β‑cyclodextrin. The characterization of obtained mixtures was carried out using X-ray

AbstractThe surface relief of blanks and silica glass fibers is studied by atomic force microscopy. The temperature change during free cooling is recorded using an infrared pyrometer. The results of the measurements of the roughness of the blank and fiber could indicate the effect of the cooling time of the quartz glass (QG) on the morphology of its surface.

Abstract—Bismuth-containing composite materials are synthesized by the impregnation of matrices of thermally modified porous glass (PG) in 0.5 M aqueous solutions of bismuth nitrate followed by heat treatment. The optical density spectra of the obtained materials are studied depending on the heat treatment temperature (400–870°C). When the temperature of the heat treatment is increased, the distribution

AbstractThe phenomenon of suppressing the potassium alkaline activity of Portland cement in the early stages of hydration in the presence of sodium water-soluble glass is established.

AbstractPolyamide-12 products based on the Schwarz primitive topology with different values of parameter t are created by 3D printing. The samples are obtained by selective laser sintering using an EOS 3D printer. The experimental stress–strain curves are obtained. It is revealed that as parameter t increases the strength of the samples decreases. Computer simulation using the COMSOL Multiphysics software

AbstractThe paper is devoted to the investigation of the polymer additives’ influence on the strength properties of a sheet and to the analysis of the absorption bands related to the vibration of the groups that participated in the formation of the network of hydrogen bonds in the system: fiber–water–additive. The relation between the intensity of the absorption bands of the stretching vibration of

AbstractThe surfaces of lead silicate glass (LSG) S87-2 and S78-4 after resurfacing followed by washing in organic solvents are studied. It is shown that long-term treatment in organic solvents leads to the removal of the foreign layer that appears after the use of oil slurries during resurfacing.

AbstractLayered perovskite-like oxides NaLaTiO4 and K2La2Ti3O10, which correspond to the Ruddlesden–Popper phases, are synthesized using various amounts (30, 100, and 1000%) of excess alkali metal carbonate in the batch and transformed into the corresponding protonated forms HLaTiO4 and H2La2Ti3O10 through the ion exchange in an aqueous solution of 0.1 M nitric acid. It is determined that an increase

AbstractTime series of acoustic emission pulses are recorded when the surface of MgAl2O4 ceramics is damaged by the introduction of a Vickers pyramid. Based on the data of the frequency analysis of the emitted sound, the ratio of the size of intra- and intergranular microcracks is estimated depending on the load on the indenter. The statistical analysis shows that the energy distribution in acoustic

AbstractNovel hybrid organic-inorganic HCa2Nb3O10 × ОМ (OM = MEA, Gly) derivatives are synthesized through the intercalation of monoethanolamine and glycine into the interplanar space of protonated layered HCa2Nb3O10 · yH2O niobate. The compounds are characterized using X-ray phase, thermogravimetric, and elemental analysis and 13С NMR spectroscopy.