Degree Of Structural Disorder Research Articles

Preparation of mesocarbon microbeads as anode material for lithium-ion battery by co‑carbonization of FCC decant oil and conductive carbon black

Low yield and unremarkable electrochemical performance of MCMB prepared from conventional thermal polymerization are inevitable, which limits its large-scale application as anode material for lithium-ion batteries. Hence, in this work, MCMBs were prepared by co‑carbonization of low-valued FCC decant oil and conductive carbon black (CCB). CCB can enhance the nucleation, inhibit the growth of the mesophase spheres and adhere on the surface of spheres, thereby increasing the yields (38.9 wt%), influencing the microstructure and subsequent electrochemical performance of MCMB. The MCMBs prepared by doping with 3 wt% CCB exhibited a small particle size (15.0 μm) and moderate structural disorder degree with wide interlayer spacing (AD3/Aall = 18.15%, d002 = 3.5342 Å), which shortened the transport pathway of Li+ inside the microbeads. Besides, chain-like conductive carbon black connected to the surface of the MCMBs, forming a continuous and developed conductive network, which was benefit for increasing of electron conduction and enhancing the Li+ transport rate outside the microbead. Such MCMB delivered the superior long-term cyclability with specific capacity of 394.5 mAh g−1 at 0.5 A g−1 (over 400 cycles) and presented a high-rate capability with reversible capacity of 276.0 mAh g−1 at an ultra-high current density of 3 A g−1.

Study of oxygen-ion conductivity and luminescence in the ZrO2 – Nd2O3 system: Impact of local heterogeneity

Stabilized fluorites and pyrochlores with different types of substitution in the (Nd2O3 − ZrO2 system (NdZrO)) have been studied by Raman spectroscopy, X-ray diffraction, and impedance spectroscopy methods. Ionic and proton conductivity maps for 9 compositions in the NdZrO system are presented. Oxygen partial pressure measurements show a typical ionic conductor behavior, with a significantly increase of conductivity for (Nd2−xZrx)Zr2O7+x/2 (x = 1.27) fluorite and (Nd2−xZrx)Zr2O7+x/2 (x = 0.4, 0.2) pyrochlores. For the same compositions the strong luminescence was observed. Strong luminescence and high oxygen-ion conductivity of these solid solutions can be associated with the presence of phases with the different degree of structural disorder (tetragonal phase, fluorite) in local nanodomains in fluorite or pyrochlore matrix in the ZrO2 − Nd2Zr2O7 region. Really, Raman spectra of (Nd2−xZrx)Zr2O7+x/2 (x = 0.5 − 0.2) solid solutions demonstrated the fluorite + pyrochlore structural type in the short-range order. Fluorite nanodomains in pyrochlore matrix (ZrO2 – Nd2Zr2O7 region) resulting from an order–disorder transition can only be detected at a radiation wavelength comparable to the fluorite nanodomain size. Thus, using Raman spectroscopy the broad isomorphism range in the ZrO2 – Nd2Zr2O7 system has been shown to be nonuniform.

Ultrasonic manifestations and axis length of blind microphthalmia

Objective: To discuss the ultrasonic manifestations of blind microphthalmia, and to explore the correlation between axis length and complicity of intraocular structure of blind microphthalmia. Methods: Retrospective case series study. The data of ultrasonic imaging and axis length of 162 patients (162 eyes) with blind microphthalmia diagnosed in Tongren Eye Center, Beijing Tongren Hospital from July 2013 to July 2018 were collected. According to the degree of internal structure disorder, all affected eyes were divided into groups of the normal, the abnormal and the indistinguishable. The binocular axial length in these patients were compared. The relationship between the axial length and the age of the patients, and the structural changes of the blind microphthalmia with a basic structure were analyzed. Statistical methods were mainly performed by paired t-test, one-way linear regression analysis and one-way analysis of variance. Results: The disease was unilateral in all the 162 patients. The age ranged from 1 month to 58 years old. And 139 cases (85.80%) were under 12 years old. There were 90 males and 72 females. The mean axial length of the affected eyes (162 eyes) was (13.17±3.77) mm, while the mean axial length of the control eyes (162 eyes) was (21.85±2.01) mm. There was significantly statistical difference in the ocular size between them (t=-27.369; P<0.01). There was no significant correlation between the axial length of the affected eye and age in patients with unilateral blind microphthalmia (r=0.027; P>0.05), while there was a significant correlation between the axial length of the control eye and age (r=0.590; P<0.01). The axial length of the groups of the normal (14 eyes), the abnormal (91 eyes) and the indistinguishable (57 eyes) was (17.80±2.19) mm, (14.81±2.92) mm and (10.05±2.46) mm, respectively, and the difference was statistically significant (F=72.800; P<0.01), and there was also significant difference between the two groups (all P<0.01). Ocular ultrasonic imaging showed that 105 eyes (64.81%) had a basic ocular structure, 83 eyes (51.23%) had retinal detachment, 15 eyes (9.26%) had bulbar ossification, and 10 eyes (6.17%) had optic disc abnormality. Conclusions: Blind microphthalmia mostly has a basic ocular structure and is often associated with retinal detachment. The axial length of the affected eye is correlated with the degree of intraocular structural disorder. (Chin J Ophthalmol, 2021, 57: 825-829).

Synthesis of Ag Nanoparticles-Decorated CNTs via Laser Ablation Method for the Enhancement the Photocatalytic Removal of Naphthalene from Water.

Silver nanoparticles (Ag NPs) were decorated with different amounts on the exterior walls of carbon nanotubes (CNTs) by a laser ablation assisted method, especially in liquid media to be applied as a good adsorption material against naphthalene. The laser ablation time was controlled the amount of decoration Ag NPs on CNTs. The prepared nanocomposite was analyzed via different analytical techniques. Ag NPs with a small size distribution of 29 nm are uniformly decorated with spherical shape on CNTs walls. The disorder degree of tubular structure and shifting of the vibrational characteristic peaks increase with the increase in the decoration of Ag NPs. After that, the prepared samples were investigated for the removal of naphthalene. These studies of loading Ag NPs with different amounts on the surface of CNTs act as a promising material for water treatment.

Tuning pulse frequency for improvement in the corrosion resistance of 304SS pipes inner DLC coatings deposited by hollow cathode PECVD

Metal pipes are widely used in industrial transportation system, but the inner surface of the pipes is easy to be corroded and not easy to be repaired, which leads to the great economic loss and environmental pollution. In this paper, the Diamond-like carbon (DLC) coatings was deposited on the inner surface of 304 stainless steel (304SS) pipes by the hollow cathode plasma enhanced chemical vapor deposition (HC-PECVD) equipped with the direct current power supply with the pulse frequency of 100, 500, 1000 and 1500 Hz. The aim of this paper is to improve the corrosion resistance of pipes inner DLC coatings by tuning the pulse frequency. Results indicate that the sp3-C hybridization content (16.7% ~ 26.7%), the disorder degree of carbon structure and the hydrogen content of pipes inner DLC coatings all show an increasing trend with the reduction of pulse frequency, while its stress level presents an opposite trend. Compared with 304SS pipes (0.51 V and 8.94 × 10−6 A∙cm−2), the pipes inner DLC coatings present more positive corrosion potential (−0.49 V ~ −0.27 V) and lower corrosion current density (3.62 × 10−6–4.46 × 10−8 A∙cm−2), better corrosion resistance, which is considerable as an effective protection coating. The pipes inner DLC coatings deposited at 500 Hz present the lowest corrosion current density (1.22 × 10−7–4.46 × 10−8 A∙cm−2). Moreover, the corrosion performances of the pipes inner DLC coatings deposited with the pulse frequency of 500 and 1000 Hz exhibit the better uniformity. Therefore, the pipes inner DLC coatings deposited at 500 Hz possesses the best corrosion resistance, which can provide important information for large-scale industrial production in the future.

Temperature-dependent influence of disorder on the thermodynamic properties of Sn20.5□3.5As20I8, a vacancy-driven superstructure of the type-I clathrate

ABSTRACT A polycrystalline sample of the Sn20.5□3.5As22I8 clathrate was synthesised by a standard ampoule method from elements. Temperature dependencies of the heat capacity Cp (T) and unit cell parameter a(T) experimentally studied at the temperatures of 2–300 K revealed abnormal behaviour of CP (T) and a(T) dependencies at the lowest (2–30 K) and elevated (200–300 K) temperatures. This was attributed to disorder in the clathrate crystal structure due to significant number of vacancies in the clathrate host matrix. The dependencies studied were analysed within the Debye–Einstein approach taking into account soft atomic potential theory, vibrations of two-level system (TLS) at the lowest temperatures, and anharmonicity of lattice vibration at elevated temperatures, which allows determining parameters of different contributions to thermodynamic characteristics of the studied clathrate. A comparison of the temperature dependence of Grüneisen parameter, which was determined from experimental data, with the temperature dependence of the calculated Grüneisen mode parameters revealed specific modes that have a decisive influence on the anomalous behaviour of the thermodynamic characteristics of the title clathrate in different parts of the studied temperature range. The dimensionless Grüneisen parameter reaches γ = 4 at moderately high temperatures, which indicates a significant degree of structural disorder and its influence on thermodynamic properties of clathrates and correlates well with low thermal conductivity of the title clathrate.

Evolution and expansion of Li concentration gradient during charge\u2013discharge cycling

To improve the performance of Li-ion batteries (LIBs), it is essential to understand the behaviour of Li ions during charge–discharge cycling. However, the analytical techniques for observing the Li ions are limited. Here, we present the complementary use of scanning transmission electron microscopy and atom probe tomography at identical locations to demonstrate that the evolution of the local Li composition and the corresponding structural changes at the atomic scale cause the capacity degradation of Li(Ni0.80Co0.15Mn0.05)O2 (NCM), an LIB cathode. Using these two techniques, we show that a Li concentration gradient evolves during cycling, and the depth of the gradient expands proportionally with the number of cycles. We further suggest that the capacity to accommodate Li ions is determined by the degree of structural disordering. Our findings provide direct evidence of the behaviour of Li ions during cycling and thus the origin of the capacity decay in LIBs.

Carbon molecular sieve membrane with tunable microstructure for CO2 separation: Effect of multiscale structures of polyimide precursors

Carbon molecular sieve (CMS) membranes were fabricated by designing the polyimides with different diamine moiety such as PPD, ODA, BAPP and BDAF to investigate the effects of multiscale structures of precursors on the microstructure and CO2 separation performance of the derived CMS membranes. The multiscale structures of polymeric precursor were characterized and simulated in terms of the characteristic of functional groups, the flatness of repeat units, the conformation of single chains, the packing efficiency of multi-chain network and the fractional free volume (FFV) of bulk polymers. The microstructure and CO2 separation performance of derived CMS membrane were characterized by XRD, TEM and gas permeation measurements. The CO2 permeation behavior of CMS membranes derived from different precursors was analyzed. Results indicated that the multiscale structures of polyimides significantly influenced the microstructure and CO2 separation performance of derived CMS membranes. Increased FFV (or reduced flatness of repeat units) in the precursor results in an increased disorder degree of carbon structure in the derived CMS membranes. The CMS membranes prepared by high FFV polyimide with helical chain conformation showed the looser carbon structure that are beneficial to CO2 transport compared with that prepared by polyimide with rod-like chain conformation. The larger size of the pendant functional groups (i.e. V-(CF3)2 > V-(CH3)2) in polyimide results in higher CO2 permeability of the derived CMS membranes. The BDAF-PMDA derived CMS membrane pyrolyzed at 700 °C show a high CO2 permeability (0.1 MPa of 50/50 mol.% mixed gas feed) of about 3000 Barrer and moderate CO2/CH4 selectivity, which exhibit an attractive application prospect for CO2 separation.

Preparation and thermoelectric properties of novel Tellurium-based glassy semiconductors

Vitrification of Tellurium-based(Te) chalcogenid semiconductors is explored as a new route to enhance their thermoelectric properties by maximizing the degree of structural disorder to produce the minimum thermal conductivity. Ga2Te3-SnTe systems are focused in this paper and the optimized glass-forming composition is identified. Complete bulk (Ga2Te3)34(SnTe)66 glass is successfully prepared by a spark plasma sintering technique and exhibited an ultralow low thermal conductivity and high Seebeck coefficient. Together with the tunable electrical conductivity, the newly obtained Ga2Te3-SnTe glasses broaden the research scope of Te-based semiconductor glasses and also provide a new option for the development of high-performance thermoelectric materials.

Influence of Ni ion site occupancy on laser induced third harmonic generation (THG) studies in Li2SO4–MgO–P2O5 amorphous system

Glasses of the composition Li2SO4–MgO–P2O5 mixed with varied contents (0.2–1.0 mol%) of nickel oxide were synthesized. Various spectroscopic investigations have indicated gradual growing proportions of Oh Ni2+ ions in the host glass. IR spectral results, in particular, have clearly demonstrated an increased degree of structural disorder of the glass nerwork with increased content of NiO. The intensity of third harmonic generation (THG) component of probing beam viz., Nd:YAG laser (λ = 1064 nm and power density J = 0–200 J/m2) induced due to the interaction of inherent dipoles with the incident laser beam, exhibited an increasing trend with increase of nickel oxide concentration up to 0.8 mol%. Analysis of the results of these studies indicated that Li2SO4–MgO–P2O5 glass samples doped with optimal content of NiO (~ 0.8 mol%) are more favorable for achieving intense THG beam with low phonon losses. Hence, such glasses may be considered as useful for optoelectronic devices. On the other hand, the samples doped with NiO content greater than 0.8 mol%, the Ni2+ ions seemed to prefer (revealed by optical absorption and IR spectroscopy studies) tetrahedral occupancy in the glass matrix and enhance the degree of the polymerization of the glass matrix; such increased order of polymerization of the glass matrix appears to be a hindrance for accomplishing higher intensity of THG signal due to large phonon losses. These results were found to be in concurrence with the inferences from other studies that include electrical properties, positron annihilation lifetime (PAL) spectroscopy and mechanical properties.

Stacking Disorder and Reactivity of Kaolinites

AbstractKaolinite is a clay mineral with diverse environmental, industrial, and agricultural applications. The influence of the crystallographic properties of kaolinite, e.g. structural disorder, on these applications is of great interest. Qualitative and quantitative analyses of kaolinite structural disordering over the last 70 years have revealed three main sources of layer-stacking disordering: (1) enantiomorphic stacking; (2) dickite-like stacking; and (3) random shift of layers. What influence do these stacking disorders have on the reactivity of kaolinite? The objective of the present study was to investigate the influence of stacking disorder on the intercalation and dissolution of kaolinite layers. To minimize the effect of particle size on reactivity, the 1–2 μm fractions of five geologic kaolinites were used. The 1–2 μm fractions varied in the degree of structural disorder. The kaolinites were: (1) intercalated with saturated CH3COOK solution at room temperature to examine the effect of stacking disorder on intercalation; and (2) dissolved in 4 M NaOH at 80°C to examine the effect of stacking disorder on kaolinite stability in alkaline solution. Samples with a low degree of stacking disorder intercalated twice as much and dissolved &gt;1.5 times as much as the most disordered sample. The infrared spectrum of the undissolved kaolinite residue in 4 M NaOH showed relative intensities of OH-stretching bands characteristic of a kaolinite-dickite mixture. The binding strength (i.e. resistance to intercalation) of the undissolved residue by NaOH was high; the residue could not be intercalated by CH3COOK. Differences in the average interlayer binding strength were attributed to the greater proportions of dickite-like sequences in highly disordered kaolinite compared to ordered kaolinite specimens. These results suggested that the binding strength of kaolinite layers is proportional to the degree of stacking disorder. Dickite-like sequences, a type of stacking defect, contributed to the lower reactivity of highly disordered kaolinite.

Investigation of unexplored kaolin occurrences in southern Mauritania and preliminary assessment of possible applications

AbstractNon-metallic raw materials are largely unexplored in many African countries. In an attempt to reduce this knowledge gap, kaolin occurrences in three promising regions of southern Mauritania were examined. The aim of the paper is to describe the occurrences and characterize the material in terms of mineralogy and potential technical use in the ceramics industry. The kaolins are geologically associated with various sedimentary rock units in either the Coastal Basin (Kaédi), the Mauritanide Belt (Hassi Abyad) or the Taoudeni Basin (Néma). Geochemical data show Al2O3contents of between 9% and 38% (corresponding to 23–96% kaolinite). Samples from the Hassi Abyad and Kaédi regions have greater kaolinite contents on average and were further investigated mineralogically. The kaolin from the Néma region contained less kaolinite (&lt;50 mass%). The region is also less accessible and hence is not considered further in this study. X-ray diffraction, X-ray fluorescence and infrared spectroscopy confirmed the geochemically calculated kaolinite contents of the kaolins and identified quartz, anatase and goethite as the remaining major mineral constituents. The degree of structural disorder of the kaolinites (determined by infrared spectroscopy) is generally greater in the Kaédi occurrences than at Hassi Abyad. Ceramic tests proved that all of these kaolin raw materials might be used for the production of ceramics, and some may even be used for fine ceramics. From an economic point of view, the Hassi Abyad deposit is interesting in terms of its quality and reserves, aspects that will be addressed in detail in a follow-up study.

Comparative investigation of transparent polycrystalline ceramic and single crystal Lu3Al5O12:Ce scintillators: Microstructural and thermoluminescence analyses

Lu3Al5O12:Ce (LuAG:Ce) single crystal and polycrystalline ceramic were investigated on their microstructural characteristics and luminescent and scintillating properties towards the identification of possible causes for the lower scintillation performance of the polycrystalline ceramic. Emphasis was placed on the thermoluminescence (TL) response. Radioluminescence results indicated a (11x) higher content of defects in the single crystal than in the polycrystalline ceramic. Lower optical transparency, higher self-absorption, and a higher degree of structural disorder localized in the grain boundaries of the polycrystalline ceramic were observed. TL results showed six glow peaks in the single crystal and four glow peaks in the polycrystalline ceramic within the 50–400 °C temperature range, all with first-order kinetics TL mechanism. Trap depths at similar peak temperatures were ~1.2–1.5 times deeper in the single crystal. In terms of scintillation response related to a Bi4Ge3O12 (BGO) crystal within the 31–662 keV gamma-ray energy range, the single crystal was about 2x brighter than the polycrystalline ceramic.

Thermal Conductivity Enhancement in Ion-Irradiated Hydrogenated Amorphous Carbon Films.

Amorphous solids are traditionally assumed to set the lower bound to the vibrational thermal conductivity of a material due to the high degree of structural disorder. Here, were demonstrate the ability to increase the thermal conductivity of amorphous solids through ion irradiation, in turn, altering the bonding network configuration. We report on the thermal conductivity of hydrogenated amorphous carbon implanted with C+ ions spanning fluences of 3 × 1014-8.6 × 1014 cm-2 and energies of 10-20 keV. Time-domain thermoreflectance measurements of the films' thermal conductivities reveal significant enhancement, up to a factor of 3, depending upon the preirradiation composition. Films with higher initial hydrogen content provide the greatest increase, which is complemented by an increased stiffening and densification from the irradiation process. This enhancement in vibrational transport is unique when contrasted to crystalline materials, for which ion implantation is known to produce structural degradation and significantly reduced thermal conductivities.

Preparation and Thermoelectric Properties of Novel Tellurium-Based Glassy Semiconductors

Vitrification of Tellurium-based(Te) chalcogenid semiconductors is explored as a new route to enhance their thermoelectric properties by maximizing the degree of structural disorder to produce the minimum thermal conductivity. Ga2Te3 -SnTe systems are focused in this paper and the optimized glass-forming composition is identified. Complete bulk (Ga2Te3) 34(SnTe)66 glass is successfully prepared by a spark plasma sintering technique and exhibited an ultralow low thermal conductivity and high Seebeck coefficient. Together with the tunable electrical conductivity, the newly obtained Ga2Te3-SnTe glasses broaden the research scope of Te-based semiconductor glasses and also provide a new option for the development of high-performance thermoelectric materials.

Investigation of thermophysical properties of ZrO2-Sm3TaO7 ceramics

ABSTRACT This study investigates rare earth RE3TaO7 ceramics and shows that these materials may be optimal for thermal barrier coatings. ZrO2-Sm3TaO7 ceramics were prepared through a solid-state reaction. X-ray diffusion and structural refinement revealed a phase structure with an ordered orthorhombic phase for the Ccmm space group. The degree of structural disorder increased with increasing ZrO2 content. Gaussian function fitting of the oxygen 1s X-ray photoelectron spectra showed that the Sm3+ and Ta5+ ions were replaced by Zr4+ ions. At high temperatures, 8 mol% ZrO2-Sm3TaO7 has a high thermal expansion coefficient (10.9 × 10−6 K−1). The thermal conductivities of ZrO2-Sm3TaO7 (1.17 − 1.75 W·m−1 K−1) are lower than those of 7–8 wt.% yttria-stabilized zirconia, while those of 2% ZrO2-Sm3TaO7 are the lowest. The oxygen vacancies maintain the charge in equilibrium and enhance phonon scattering while decreasing the thermal conductivity. These results indicate that Sm3TaO7 can be used as a TBC.

Probing the difference of crystalline modifications and structural disorder of isotactic polypropylene via high-resolution FTIR spectroscopy

Isotactic polypropylene (iPP) crystallized in different crystalline modifications has been investigated by high-resolution FTIR spectroscopy. We focus on the spectral behavior of a band at ~841 cm−1 that is generally employed as a probe to monitor the crystallization process of iPP. The peak position of the ~841 cm−1 band (P841) in the IR spectrum of α-form iPP is quite different from that of β-form. However, the value of P841 for γ-form is roughly the same as that for α-form. The above spectral behaviors are relevant to the packing modes of 31 helices in different crystalline modifications. Furthermore, P841 of the mesophase (842.05 cm−1) is evidently larger than that of the α-crystal (840.84 cm−1), but is closer to that of the β-crystal (841.55 cm−1). Additionally, the degree of structural disorder in the α-crystal also exerts observable influence on P841, suggesting that the P841 is also suitable for detecting the change of structural disorder in α-crystal. The results prove FTIR spectroscopy is still vitality nowadays for in-depth investigation of polymer crystallization.

Electric Field-Induced Polarization Responses of Noncentrosymmetric Crystalline Biopolymers in Different Frequency Regimes - A Case Study on Unidirectionally Aligned β-Chitin Crystals.

A dielectric medium containing noncentrosymmetric domains can exhibit piezoelectric and second-harmonic generation (SHG) responses when an electric field is applied. Since many crystalline biopolymers have noncentrosymmetric structures, there has been a great deal of interest in exploiting their piezoelectric and SHG responses for electromechanical and electro-optic devices, especially owing to their advantages such as biocompatibility and low density. However, exact mechanisms or origins of such polarization responses of crystalline biopolymers remain elusive due to the convolution of responses from multiple domains with varying degrees of structural disorder or difficulty of ensuring the unidirectional alignment of noncentrosymmetric domains. In this study, we investigate the polarization responses of a noncentrosymmetric crystalline biopolymer, namely, unidirectionally aligned β-chitin crystals interspersed in the amorphous protein matrix, which can be obtained naturally from tubeworm Lamellibrachia satsuma (LS) tube. The mechanisms governing polarization responses in different dynamic regimes covering optical (>1013 Hz), acoustic/ultrasonic (103-105 Hz), and low (10-2-102 Hz) frequencies are explained. Relationships between the polarization responses dominant in different frequencies are addressed. Also, electromechanical coupling responses, including piezoelectricity of the LS tube, are quantitatively discussed. The findings of this study can be applicable to other noncentrosymmetric crystalline biopolymers, elucidating their polarization responses.

Disorder driven asymmetry and singular red emission in doped Lu2Hf2O7 nanocrystals with no charge compensating defects

High performance luminescent materials possess low symmetry, high color purity, no charge compensating defects, and high quantum yield. In this work, we have synthesized Lu2Hf2O7 (LuHO) and Lu2Hf2O7:Eu3+ (LuHOE) nanocrystals (NCs) using a molten salt synthesis and confirmed that both are stabilized in defect fluorite structure with a high degree of structural disordering. The LuHO NCs depicted green emission under ultraviolet irradiation, which decreases and increases after being treated in oxidizing and reducing environments, respectively, confirming the role of oxygen vacancies in the emission process. The LuHOE NCs (i) show excitation wavelength-dependent host to dopant energy transfer efficiency, (ii) give a singular red emission with high color purity of ~95%, (iii) have a dominant occupation of the Lu3+ sites by Eu3+ ions without the formation of charge compensating defects (CCDs), and (iv) possess low non-radiative channels with a quantum yield of ~88%. We believe these LuHOE NCs with singular red emission, high quantum yield, and color purity acquired through structural disordering and the absence of CCDs warrant further investigation as efficient phosphors.

Study of physical, optical properties and gamma radiation shielding efficiency of 0.5Bi2O3-(0.5-x)WO3-xPbO glasses

This paper presents the results of a study of the properties of a series of 0.5Bi 2 O 3 -(0.5-x)WO 3 -xPbO glasses obtained by sintering. Using the X-ray diffraction method, an amorphous glass structure is installed. Analysis of structural and optical characteristics showed that an increase in PbO concentration leads to an increase in density, as well as a decrease in the metallization criterion. It was found that an increase in PbO leads to a decrease in the band gap and an increase in the linear refractive index, a change in which indicates a change in the degree of structural disorder caused by impurities or electron traps. During experiments to determine the gamma-ray shielding efficiency, it was found that the best shielding efficiency is possessed by 0.5Bi 2 O 3 -0.125WO 3 -0.375PbO glasses, for which the mass attenuation coefficient is 3.6 times higher than that for 0.5Bi 2 O 3 -0.5WO 3 glasses. The results obtained are in good agreement with the literature data for similar structures, and the proposed method of obtaining can be used in the future for the technological process of industrial production of radiation-protective materials. • The results of a study of the properties of a series of 0.5Bi 2 O 3 -(0.5-x)WO 3 -xPbO glasses. • The change in the value of the band gap and linear refractive index. • The radiation protection efficiency versus PbO concentration. • The dependence of changes in linear and mass attenuation coefficient of gamma radiation.