Pub Date : 2023-12-27DOI: 10.1134/s1087659623600680
V. I. Voshchikov, L. N. Krasil’nikova, Chi Văn Nguyên, A. M. Nikolaev, V. A. Aseev, O. A. Shilova
Abstract
The results of a study of the weather resistance of protective and decorative organosilicate coatings prepared using organosilicate compositions based on polydimethylphenylsiloxane as a binder and hydrosilicates as fillers are presented. The color of the coatings varies due to the use of pigments: natural FeOx minerals of yellow, red-brown, and brown shades of flowers. Using X-ray phase and X-ray fluorescence (XRF) analysis, it is established that the composition of minerals is primarily determined by iron oxides in the crystalline modification of hematite (α-Fe2O3) and goethite (α-FeO(OH)). Pigments contain a small number of impurity compounds of a number of elements that contribute to the color range of the coatings. Organosilicate coatings are exposed for 11 months in the tropical climate of two climatic zones of Vietnam (in the suburbs of Nha Trang and Ho Chi Minh City). The high corrosion resistance and color stability of the coatings are established during the entire test period. According to slight changes in the color and gloss, revealed by spectrophotometric and photoelectric methods, it is shown that higher resistance to solar radiation and other adverse climatic factors is typical for coatings with a brown pigment based on hematite; and the lowest, with a yellow pigment based on goethite.
摘要 本文介绍了对以聚二甲基苯基硅氧烷为粘合剂、氢硅酸盐为填料的有机硅组合物制备的防护性和装饰性有机硅涂料的耐候性研究结果。由于使用了颜料（黄色、红棕色和棕色花纹的天然氧化铁矿物），涂层的颜色各不相同。通过 X 射线相位和 X 射线荧光 (XRF) 分析，可以确定矿物的成分主要由赤铁矿（α-Fe2O3）和鹅铁矿（α-FeO(OH)）晶体结构中的氧化铁决定。颜料中含有少量由多种元素组成的杂质化合物，这些杂质化合物会影响涂层的颜色范围。有机硅涂料在越南两个气候区（芽庄郊区和胡志明市郊区）的热带气候中暴露 11 个月。在整个试验期间，涂层的高耐腐蚀性和颜色稳定性得到了证实。根据分光光度法和光电法显示的颜色和光泽的细微变化，可以看出，以赤铁矿为基础的棕色颜料涂料具有较高的抗太阳辐射和其他不利气候因素的能力，而以鹅卵石为基础的黄色颜料涂料的抗太阳辐射和其他不利气候因素的能力最低。
{"title":"Weather Resistance of Organosilicate Coatings in a Tropical Climate Depending on the Choice of the Pigment","authors":"V. I. Voshchikov, L. N. Krasil’nikova, Chi Văn Nguyên, A. M. Nikolaev, V. A. Aseev, O. A. Shilova","doi":"10.1134/s1087659623600680","DOIUrl":"https://doi.org/10.1134/s1087659623600680","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of a study of the weather resistance of protective and decorative organosilicate coatings prepared using organosilicate compositions based on polydimethylphenylsiloxane as a binder and hydrosilicates as fillers are presented. The color of the coatings varies due to the use of pigments: natural FeO<sub><i>x</i></sub> minerals of yellow, red-brown, and brown shades of flowers. Using X-ray phase and X-ray fluorescence (XRF) analysis, it is established that the composition of minerals is primarily determined by iron oxides in the crystalline modification of hematite (α-Fe<sub>2</sub>O<sub>3</sub>) and goethite (α-FeO(OH)). Pigments contain a small number of impurity compounds of a number of elements that contribute to the color range of the coatings. Organosilicate coatings are exposed for 11 months in the tropical climate of two climatic zones of Vietnam (in the suburbs of Nha Trang and Ho Chi Minh City). The high corrosion resistance and color stability of the coatings are established during the entire test period. According to slight changes in the color and gloss, revealed by spectrophotometric and photoelectric methods, it is shown that higher resistance to solar radiation and other adverse climatic factors is typical for coatings with a brown pigment based on hematite; and the lowest, with a yellow pigment based on goethite.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139056314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-27DOI: 10.1134/s1087659623600400
Mona Abo Zeed, R. M. El Shazly, E. Elesh, H. M. El-Mallah, Aly Saeed
Abstract
The influence of B3+ and Pb2+ ions on the electrical and mechanical properties of a borate network was extensively studied. A 30B2O3–10ZnO–60Na2O core network was prepared using the commercial melt/quenching technique and inlaid by different concentrations of B2O3 + Pb3O4 at the expense of Na2O. The impact of Pb2+ and B3+ ions on the mechanical properties were studied through ultrasonic wave velocities, elastic moduli, and microhardness. The more bridging oxygens BO4 that brought to the considered borate network due to the more addition of B2O3 and conversion of BO3 to BO4 via Pb2+ ions penetration, formation of PbO6, and formation of the strong bonds B–O–Pb reinforced elastic moduli and microhardness of the studied borate network. Electrical properties through dielectric constant, electric modulus, impedance, and ac conductivity were extensively studied. The dielectric constant and electric modulus showed a behavior up to 20 mol % of Pb2+ and 35 mol % of B3+ differs from after that concentration, while ac conductivity differs at 40 mol % of Pb2+ and 50 mol % of B3+ from before that concentration. The results of the dependence of conductivity on frequency and temperature showed that the considered glass have a semiconducting nature.
{"title":"Dual Effect of B3+ and Pb2+ Ions on the Elasticity and Semiconducting Nature of Sodium Zinc Borate Glass","authors":"Mona Abo Zeed, R. M. El Shazly, E. Elesh, H. M. El-Mallah, Aly Saeed","doi":"10.1134/s1087659623600400","DOIUrl":"https://doi.org/10.1134/s1087659623600400","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The influence of B<sup>3+</sup> and Pb<sup>2+</sup> ions on the electrical and mechanical properties of a borate network was extensively studied. A 30B<sub>2</sub>O<sub>3</sub>–10ZnO–60Na<sub>2</sub>O core network was prepared using the commercial melt/quenching technique and inlaid by different concentrations of B<sub>2</sub>O<sub>3</sub> + Pb<sub>3</sub>O<sub>4</sub> at the expense of Na<sub>2</sub>O. The impact of Pb<sup>2+</sup> and B<sup>3+</sup> ions on the mechanical properties were studied through ultrasonic wave velocities, elastic moduli, and microhardness. The more bridging oxygens BO<sub>4</sub> that brought to the considered borate network due to the more addition of B<sub>2</sub>O<sub>3</sub> and conversion of BO<sub>3</sub> to BO<sub>4</sub> via Pb<sup>2+</sup> ions penetration, formation of PbO<sub>6</sub>, and formation of the strong bonds B–O–Pb reinforced elastic moduli and microhardness of the studied borate network. Electrical properties through dielectric constant, electric modulus, impedance, and ac conductivity were extensively studied. The dielectric constant and electric modulus showed a behavior up to 20 mol % of Pb<sup>2+</sup> and 35 mol % of B<sup>3+</sup> differs from after that concentration, while ac conductivity differs at 40 mol % of Pb<sup>2+</sup> and 50 mol % of B<sup>3+</sup> from before that concentration. The results of the dependence of conductivity on frequency and temperature showed that the considered glass have a semiconducting nature.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139056253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-27DOI: 10.1134/s1087659623600552
V. A. Kazakov, N. P. Starovoitov, V. A. Dudkin, S. V. Korenev, P. V. Kozlov, M. B. Remizov
Abstract
A technique for the experimental determination of the thermophysical characteristics of inactive aluminophosphate and borosilicate glasses by differential scanning calorimetry (DSC) is proposed and tested. The advantages of this measurement technique are shown. For glassy matrices of various compositions, the specific heat capacity and thermal conductivity coefficient are determined. The obtained experimental values make it possible to calculate the thermal conductivity values. The applicability of this method is proved by working with real samples of vitrified high-level waste to study their properties and form a database based on them.
{"title":"Study of the Thermophysical Properties of Aluminophosphate and Borosilicate Glasses by DSC","authors":"V. A. Kazakov, N. P. Starovoitov, V. A. Dudkin, S. V. Korenev, P. V. Kozlov, M. B. Remizov","doi":"10.1134/s1087659623600552","DOIUrl":"https://doi.org/10.1134/s1087659623600552","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A technique for the experimental determination of the thermophysical characteristics of inactive aluminophosphate and borosilicate glasses by differential scanning calorimetry (DSC) is proposed and tested. The advantages of this measurement technique are shown. For glassy matrices of various compositions, the specific heat capacity and thermal conductivity coefficient are determined. The obtained experimental values make it possible to calculate the thermal conductivity values. The applicability of this method is proved by working with real samples of vitrified high-level waste to study their properties and form a database based on them.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139056372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-27DOI: 10.1134/s1087659623600035
Yosuke Uchida, Takumi Iwaki, Teruhisa Hongo
Abstract
Blast furnace slag is produced in large quantities as a by-product in the steel manufacturing process. In this study, a method for synthesizing lead ion adsorbent with high adsorption ability was investigated by alkali activation of the blast furnace slag. A sodium hydroxide aqueous solution was used as an alkali activator, and silica was added to the aqueous solution to improve the adsorption capacity. Alkali activation of the blast furnace slag with the sodium hydroxide aqueous solution yielded lead ion adsorbent. Addition of silica to the sodium hydroxide aqueous solution further increased the lead ion adsorption capacity. Langmuir adsorption isotherms revealed that the highest maximum adsorption capacity of 1658.1 mg-Pb/g was obtained when 5 g of silica was added to 50 mL of the sodium hydroxide aqueous solution. The adsorption capacity for lead ion decreased when more than 10 g of silica was added to the sodium hydroxide aqueous solution.
{"title":"Effect of Silica Addition on Lead Ion Adsorption Ability of Alkali-Activated Blast Furnace Slag","authors":"Yosuke Uchida, Takumi Iwaki, Teruhisa Hongo","doi":"10.1134/s1087659623600035","DOIUrl":"https://doi.org/10.1134/s1087659623600035","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Blast furnace slag is produced in large quantities as a by-product in the steel manufacturing process. In this study, a method for synthesizing lead ion adsorbent with high adsorption ability was investigated by alkali activation of the blast furnace slag. A sodium hydroxide aqueous solution was used as an alkali activator, and silica was added to the aqueous solution to improve the adsorption capacity. Alkali activation of the blast furnace slag with the sodium hydroxide aqueous solution yielded lead ion adsorbent. Addition of silica to the sodium hydroxide aqueous solution further increased the lead ion adsorption capacity. Langmuir adsorption isotherms revealed that the highest maximum adsorption capacity of 1658.1 mg-Pb/g was obtained when 5 g of silica was added to 50 mL of the sodium hydroxide aqueous solution. The adsorption capacity for lead ion decreased when more than 10 g of silica was added to the sodium hydroxide aqueous solution.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139056192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-27DOI: 10.1134/s1087659623600679
D. S. Ershov, N. V. Besprozvannykh, O. Yu. Sinelshchikova
Abstract
The article presents the results of a study of new ceramic materials φ-Bi8Pb5O17 obtained by pyrolysis using mannitol C6H14O6 as a reducing fuel. The values of the band gap of the obtained compositions are determined by analyzing the diffuse reflectance spectra using the Tauc construction. They are in the range from 2.57 to 2.67 eV, which corresponds to visible light photocatalysts. The degree of degradation of methylene orange when using synthesized samples ranged from 95 to 99% when irradiated for 3 h with a fluorescent mercury lamp.
{"title":"Effect of Conditions of Mannitol-Nitrate Synthesis on Photocatalytic Properties of φ-Bi8Pb5O17","authors":"D. S. Ershov, N. V. Besprozvannykh, O. Yu. Sinelshchikova","doi":"10.1134/s1087659623600679","DOIUrl":"https://doi.org/10.1134/s1087659623600679","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The article presents the results of a study of new ceramic materials φ-Bi<sub>8</sub>Pb<sub>5</sub>O<sub>17</sub> obtained by pyrolysis using mannitol C<sub>6</sub>H<sub>14</sub>O<sub>6</sub> as a reducing fuel. The values of the band gap of the obtained compositions are determined by analyzing the diffuse reflectance spectra using the Tauc construction. They are in the range from 2.57 to 2.67 eV, which corresponds to visible light photocatalysts. The degree of degradation of methylene orange when using synthesized samples ranged from 95 to 99% when irradiated for 3 h with a fluorescent mercury lamp.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139056315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-27DOI: 10.1134/s1087659622600636
J. Anjaiah
Abstract
The dielectric constant (ε'), loss factor (tanδ), and ac conductivity (σac) of 30 Li2O–10CdO–(60 – x)-B2O3:xLn2O3, where (x = 0 and 1) and (Ln = Pr, Nd, Sm, and Eu) were investigated using a frequency range of 102–105 Hz and temperature ranging from 30 to 250°C in this work. The differential scanning calorimetry (DSC) technique was employed to confirm the glassy nature of the materials under study. The dielectric parameters ε', tan δ, and σac rise when rare-earth ions are added to the glass matrix at any frequency or temperature. Dielectric breakdown and activation energies are lower in doped than in undoped glasses while ac current flows through them at room temperature. Rare-earth ion doping’s dielectric parameter values decrease with temperature as atomic number (Z) rises. The dielectric parameter values for the Pr3+ doped glass matrix is the highest. QM tunnelling model was used to describe the ac conduction behaviour of these glasses.
{"title":"Effect of Rare Earth Ion Doping on ac Conductivity and Dielectric Properties of Lithium Cadmium Borate Glasses","authors":"J. Anjaiah","doi":"10.1134/s1087659622600636","DOIUrl":"https://doi.org/10.1134/s1087659622600636","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The dielectric constant (ε'), loss factor (tanδ), and ac conductivity (σ<sub>ac</sub>) of 30 Li<sub>2</sub>O–10CdO–(60 – <i>x</i>)-B<sub>2</sub>O<sub>3</sub>:<i>x</i>Ln<sub>2</sub>O<sub>3</sub>, where (<i>x</i> = 0 and 1) and (Ln = Pr, Nd, Sm, and Eu) were investigated using a frequency range of 10<sup>2</sup>–10<sup>5</sup> Hz and temperature ranging from 30 to 250°C in this work. The differential scanning calorimetry (DSC) technique was employed to confirm the glassy nature of the materials under study. The dielectric parameters ε', tan δ, and σ<sub>ac</sub> rise when rare-earth ions are added to the glass matrix at any frequency or temperature. Dielectric breakdown and activation energies are lower in doped than in undoped glasses while ac current flows through them at room temperature. Rare-earth ion doping’s dielectric parameter values decrease with temperature as atomic number (<i>Z</i>) rises. The dielectric parameter values for the Pr<sup>3+</sup> doped glass matrix is the highest. QM tunnelling model was used to describe the ac conduction behaviour of these glasses.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139056194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-27DOI: 10.1134/s1087659623600692
V. Ya. Shevchenko, G. D. Ilyushin
Abstract
Using the ToposPro software package, a combinatorial-topological analysis and modeling of the self-assembly of the following crystal structures with space group I4/mcm are realized: Pu31Rh20-tI204: a = 11.076 Å, c = 36.933 Å, V = 4530.86 Å3, Pu20Os12-tI32: a = 10.882 Å, c = 5.665 Å, V = 670.8 Å3. (Pu4Co)2 (Pu4)-tI28: a = 10.475 Å, c = 5.340 Å, V = 585.9Å3. (Ti4Ni)2(Bi4)-tI28: a = 10.554 Å, c = 4.814 Å, V = 536.2Å3, Bi4-tI8: a = 8.518 Å, c = 4.164 Å, V = 302.15 Å3. For the crystal structure of Pu31Rh20-tI204, 113 variants of the cluster representation of the 3D atomic network with the following number of structural units are established: 4 (14 variants), 5 (61 variants), and 6 (38 variants). A variant of the self-assembly of the crystal structure with the participation of three types of framework-forming polyhedra is considered: K15 = Pu@14(Rh2Pu5)2 with symmetry –42m, double pyramids K10 = (Rh@Pu4)2 with symmetry 4, and octahedra K6 = 0@8(Rh2Pu6) with symmetry mmm and spacers Rh. For the crystal structure of Pu20Os12-tI32, framework-forming pyramid-shaped polyhedra K5 = 0@OsPu4 with symmetry 4, as well as spacers Pu and Os, are defined. For the crystal structure (Ti4Ni)2(Bi4), frame-forming pyramids K5 = 0@Ti4Ni and tetrahedra K4 = 0@Bi4) are defined. For the crystal structure (Pu4Co)2(Pu4)-tI28, frame-forming pyramids K5 = 0@ Pu4Co and tetrahedra K4 = 0@Pu4 are defined. For the crystal structure of Bi4-tI8, frame-forming tetrahedra K4 = 0@Bi4 are defined. The symmetric and topological code of self-assembly processes of 3D structures is reconstructed from clusters-precursors in the following form: primary chain → layer → framework.
摘要 利用 ToposPro 软件包，实现了空间群为 I4/mcm 的下列晶体结构的组合-拓扑分析和自组装建模：Pu31Rh20-tI204: a = 11.076 Å, c = 36.933 Å, V = 4530.86 Å3, Pu20Os12-tI32: a = 10.882 Å, c = 5.665 Å, V = 670.8 Å3. (Pu4Co)2 (Pu4)-tI28: a = 10.(Ti4Ni)2(Bi4)-tI28: a = 10.554 Å, c = 4.814 Å, V = 536.2 Å3, Bi4-tI8: a = 8.518 Å, c = 4.164 Å, V = 302.15 Å3.就 Pu31Rh20-tI204 晶体结构而言，三维原子网络的簇表示法有 113 个变体，其结构单元数目如下：4（14 个变体）、5（61 个变体）和 6（38 个变体）。考虑了三种框架形成多面体参与的晶体结构自组装变体：对称性为 -42m 的 K15 = Pu@14(Rh2Pu5)2，对称性为 4 的双金字塔 K10 = (Rh@Pu4)2，对称性为 mmm 的八面体 K6 = 0@8(Rh2Pu6)和间隔物 Rh。对于 Pu20Os12-tI32 晶体结构，定义了对称性为 4 的框架形成金字塔形多面体 K5 = 0@OsPu4，以及间隔物 Pu 和 Os。对于晶体结构 (Ti4Ni)2(Bi4)，定义了形成框架的金字塔形多面体 K5 = 0@Ti4Ni 和四面体 K4 = 0@Bi4）。对于 (Pu4Co)2(Pu4)-tI28 晶体结构，定义了框架形成金字塔 K5 = 0@ Pu4Co 和四面体 K4 = 0@Pu4。对于 Bi4-tI8 的晶体结构，定义了框架形成的四面体 K4 = 0@Bi4。三维结构自组装过程的对称和拓扑代码是按以下形式从簇-前驱体重建的：主链→层→框架。
{"title":"Cluster Self-Organization of Intermetallic Systems: Clusters-Precursors K15, K6, K5, and K4 for the Self-Assembly of Crystal Structures Pu31Rh20-tI204, Pu20Os12-tI32, (Pu4Co)2(Pu4)-tI28, (Ti4Ni)2(Bi4)-tI28, and Bi4-tI8","authors":"V. Ya. Shevchenko, G. D. Ilyushin","doi":"10.1134/s1087659623600692","DOIUrl":"https://doi.org/10.1134/s1087659623600692","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Using the ToposPro software package, a combinatorial-topological analysis and modeling of the self-assembly of the following crystal structures with space group <i>I</i>4/<i>mcm</i> are realized: Pu<sub>31</sub>Rh<sub>20</sub>-<i>tI</i>204: <i>a</i> = 11.076 Å, <i>c</i> = 36.933 Å, <i>V</i> = 4530.86 Å<sup>3</sup>, Pu<sub>20</sub>Os<sub>12</sub>-<i>tI</i>32: <i>a</i> = 10.882 Å, <i>c</i> = 5.665 Å, <i>V</i> = 670.8 Å<sup>3</sup>. (Pu<sub>4</sub>Co)<sub>2</sub> (Pu<sub>4</sub>)-<i>tI</i>28: <i>a</i> = 10.475 Å, <i>c</i> = 5.340 Å, <i>V</i> = 585.9Å<sup>3</sup>. (Ti<sub>4</sub>Ni)<sub>2</sub>(Bi4)-<i>tI</i>28: <i>a</i> = 10.554 Å, <i>c</i> = 4.814 Å, <i>V</i> = 536.2Å<sup>3</sup>, Bi<sub>4</sub>-<i>tI</i>8: <i>a</i> = 8.518 Å, <i>c</i> = 4.164 Å, <i>V</i> = 302.15 Å<sup>3</sup>. For the crystal structure of Pu<sub>31</sub>Rh<sub>20</sub>-<i>tI</i>204, 113 variants of the cluster representation of the 3<i>D</i> atomic network with the following number of structural units are established: 4 (14 variants), 5 (61 variants), and 6 (38 variants). A variant of the self-assembly of the crystal structure with the participation of three types of framework-forming polyhedra is considered: <i>K</i>15 = Pu@14(Rh<sub>2</sub>Pu<sub>5</sub>)<sub>2</sub> with symmetry –42<i>m</i>, double pyramids <i>K</i>10 = (Rh@Pu<sub>4</sub>)<sub>2</sub> with symmetry 4, and octahedra <i>K</i>6 = 0@8(Rh<sub>2</sub>Pu<sub>6</sub>) with symmetry <i>mmm</i> and spacers Rh. For the crystal structure of Pu<sub>20</sub>Os<sub>12</sub>-<i>tI</i>32, framework-forming pyramid-shaped polyhedra <i>K</i>5 = 0@OsPu<sub>4</sub> with symmetry 4, as well as spacers Pu and Os, are defined. For the crystal structure (Ti<sub>4</sub>Ni)<sub>2</sub>(Bi4), frame-forming pyramids <i>K</i>5 = 0@Ti<sub>4</sub>Ni and tetrahedra <i>K</i>4 = 0@Bi<sub>4</sub>) are defined. For the crystal structure (Pu<sub>4</sub>Co)<sub>2</sub>(Pu<sub>4</sub>)-<i>tI</i>28, frame-forming pyramids <i>K</i>5 = 0@ Pu<sub>4</sub>Co and tetrahedra <i>K</i>4 = 0@Pu<sub>4</sub> are defined. For the crystal structure of Bi<sub>4</sub>-<i>tI</i>8, frame-forming tetrahedra <i>K</i>4 = 0@Bi<sub>4</sub> are defined. The symmetric and topological code of self-assembly processes of 3D structures is reconstructed from clusters-precursors in the following form: primary chain → layer → framework.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139056620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-27DOI: 10.1134/s1087659623600722
A. P. Shablinskii, S. N. Volkov, R. S. Bubnova, S. K. Filatov
Abstract
This article presents the results of the interpretation and refinement of the crystal structure of an Sr0.5Ba0.5Bi2O(BO3)2 solid solution. The distribution of cations over positions is refined, which shows that Sr is included in the smallest positions M3 and M1, Ba is in positions M1 and M2, and Bi is found in all three large cationic positions. The crystal structure of Sr0.5Ba0.5Bi2O(BO3)2 is compared with the end members of the series of SrBi2O(BO3)2 and BaBi2O(BO3)2 solid solutions.
{"title":"Crystal Structure of a Solid Solution of Sr0.5Ba0.5Bi2O(BO3)2","authors":"A. P. Shablinskii, S. N. Volkov, R. S. Bubnova, S. K. Filatov","doi":"10.1134/s1087659623600722","DOIUrl":"https://doi.org/10.1134/s1087659623600722","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This article presents the results of the interpretation and refinement of the crystal structure of an Sr<sub>0.5</sub>Ba<sub>0.5</sub>Bi<sub>2</sub>O(BO<sub>3</sub>)<sub>2</sub> solid solution. The distribution of cations over positions is refined, which shows that Sr is included in the smallest positions <i>M</i>3 and <i>M</i>1, Ba is in positions <i>M</i>1 and <i>M</i>2, and Bi is found in all three large cationic positions. The crystal structure of Sr<sub>0.5</sub>Ba<sub>0.5</sub>Bi<sub>2</sub>O(BO<sub>3</sub>)<sub>2</sub> is compared with the end members of the series of SrBi<sub>2</sub>O(BO<sub>3</sub>)<sub>2</sub> and BaBi<sub>2</sub>O(BO<sub>3</sub>)<sub>2</sub> solid solutions.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139056191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-27DOI: 10.1134/s1087659623600710
M. A. Girsova, G. F. Golovina, L. N. Kurilenko, I. N. Anfimova
Abstract
Composite materials (CMs) based on porous glass matrices activated by yttrium in the presence of copper or bismuth are synthesized. It is established that, depending on the composition, the CM samples exhibit UV, blue-green, red, and infrared luminescence due to the presence of various centers, including Bi3+ and Cu+ ions, F centers in Y2O3, and molecular ions ({text{O}}_{3}^{{ - 2}}) associated with cation vacancies Y3+.
{"title":"Spectral Properties of Nanostructured Composite Glass Materials Activated by Yttrium in the Presence of Copper or Bismuth","authors":"M. A. Girsova, G. F. Golovina, L. N. Kurilenko, I. N. Anfimova","doi":"10.1134/s1087659623600710","DOIUrl":"https://doi.org/10.1134/s1087659623600710","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Composite materials (CMs) based on porous glass matrices activated by yttrium in the presence of copper or bismuth are synthesized. It is established that, depending on the composition, the CM samples exhibit UV, blue-green, red, and infrared luminescence due to the presence of various centers, including Bi<sup>3+</sup> and Cu<sup>+</sup> ions, F centers in Y<sub>2</sub>O<sub>3</sub>, and molecular ions <span>({text{O}}_{3}^{{ - 2}})</span> associated with cation vacancies Y<sup>3+</sup>.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139056252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-27DOI: 10.1134/s108765962360062x
V. Ya. Shevchenko, A. S. Oryshchenko, A. N. Belyakov, S. N. Perevislov
Abstract
In this paper, a new diamond–silicon carbide ceramic composite material—Ideal—is studied and its mechanical characteristics are determined. For the first time, a comprehensive determination of Poisson’s ratio, shear modulus, bulk modulus, and transverse sound velocity is carried out. Poisson’s ratio is in the region of 0.008 to 0.01, which, in turn, indicates the absolutely brittle nature of the failure of the Ideal ceramic under loading. The criteria that allow evaluating different materials used for body armor are calculated.
{"title":"Determination of the Mechanical Characteristics of the Ideal Ceramic (Diamond–Silicon Carbide Composite)","authors":"V. Ya. Shevchenko, A. S. Oryshchenko, A. N. Belyakov, S. N. Perevislov","doi":"10.1134/s108765962360062x","DOIUrl":"https://doi.org/10.1134/s108765962360062x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In this paper, a new diamond–silicon carbide ceramic composite material—Ideal—is studied and its mechanical characteristics are determined. For the first time, a comprehensive determination of Poisson’s ratio, shear modulus, bulk modulus, and transverse sound velocity is carried out. Poisson’s ratio is in the region of 0.008 to 0.01, which, in turn, indicates the absolutely brittle nature of the failure of the Ideal ceramic under loading. The criteria that allow evaluating different materials used for body armor are calculated.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139056193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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