{"title":"Anisotropy of Thermal Expansion of Oxoborate Warwickite","authors":"Y. P. Biryukov, R. S. Bubnova, S. K. Filatov","doi":"10.1134/S1087659623600503","DOIUrl":"10.1134/S1087659623600503","url":null,"abstract":"<p>In this paper, the transition metal oxoborate warwickite (Fe<sup>2+</sup>,Mg)Fe<sup>3+</sup>(BO<sub>3</sub>)O is studied for the first time by low- and high-temperature X-ray diffraction in the temperature range from 93 to 513 K. The sharply anisotropic nature of its thermal expansion is revealed. A structural interpretation of the expansion mechanism is given both in terms of the contribution of cationic and oxocentered polyhedra.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"49 5","pages":"514 - 519"},"PeriodicalIF":0.7,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134796902","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}
J. N. Mirdda, S. Mukhopadhyay, K. R. Sahu, M. N. Goswami
{"title":"Enhancement of Optical and Electrical Properties of Pr3+ Doped Na2O–ZnO–TeO2 Glass Materials","authors":"J. N. Mirdda, S. Mukhopadhyay, K. R. Sahu, M. N. Goswami","doi":"10.1134/S108765962360045X","DOIUrl":"10.1134/S108765962360045X","url":null,"abstract":"<p>Praseodymium incorporated Na<sub>2</sub>O–ZnO–TeO<sub>2</sub> (NZT) glass materials were prepared through usual melt quenching technique. The temperature of glass transition and the melting point were obtained by using thermal analyses. The amorphous and ionic nature of the prepared samples was obtained from the recorded X-ray diffraction pattern and FTIR spectra respectively. The optical band gap energy was calculated using UV-Vis absorption spectra and was observed to be decreased from 2.86 to 2.46 eV due to the increasing concentration of Pr<sup>3+</sup> ions. The peaks of absorption spectra were found. The intense emission was observed from the fluorescence measurement for the emission band of Pr<sup>3+</sup> doped glass materials. The doping of higher concentrations of Pr<sup>3+</sup> ions enhanced the intensity of the emission peaks. The CIE chromaticity coordinates were estimated from fluorescence spectra for pure and Pr<sup>3+</sup> doped glass samples to know the suitability of laser emission of these glass samples. The dielectric constant of the glass materials was observed to be independent of frequency in the large range of frequency (500 Hz to 2 MHz). The variation of conductivity of the glasses was exposed the Arrhenius mechanism of conduction with the temperature.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"49 5","pages":"442 - 455"},"PeriodicalIF":0.7,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134796987","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}
{"title":"Effect of Disorder in the Structure of a Ferroelectric Composite Material xPbSe·(1 – x)PbSeO3 on the Smearing of the Phase Transition","authors":"V. V. Tomaev, D. P. Danilovich, S. S. Proshkin","doi":"10.1134/S1087659623600278","DOIUrl":"10.1134/S1087659623600278","url":null,"abstract":"<p>This paper analyzes the experimental and theoretical studies of the problem of a diffuse phase transition (PTC) in a composite material <i>x</i>PbSe⋅(1 – <i>x</i>)PbSeO<sub>3</sub>, in which <i>x</i> varies from 0 to 1. The decrease in stability in the virtual cubic phase of lead selenide (PbSe) is achieved by oxidizing it with atmospheric oxygen and forming a ferroelectric disordered monoclinic phase of lead selenite (PbSeO<sub>3</sub>). The mechanism of lead selenide oxidation by air oxygen is studied by X-ray diffractometry, optical reflection in the infrared region of the spectrum, X-ray emission analysis (the chemical shift method), nuclear magnetic resonance, studies of AC and DC conductivity, differential scanning calorimetry, and other methods. The reason for the smearing of the phase transition in the <i>x</i>PbSe⋅(1 – <i>x</i>)PbSeO<sub>3</sub> composite, in which <i>x</i> varies from 0 to 1, is analyzed based on the previously obtained experimental results of its detection.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"49 4","pages":"364 - 373"},"PeriodicalIF":0.7,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4563653","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}
M. A. Gavrilova, D. A. Gavrilova, I. S. Kondrashkova, A. A. Krasilin
{"title":"Formation of Zn0.5Ni0.5Fe2O4 Nanocrystals in Conditions of Solution Combustion: Effect of the Type of Fuel on the Structure and Morphology","authors":"M. A. Gavrilova, D. A. Gavrilova, I. S. Kondrashkova, A. A. Krasilin","doi":"10.1134/S108765962360028X","DOIUrl":"10.1134/S108765962360028X","url":null,"abstract":"<p>Nickel-zinc ferrites, which have pronounced ferrimagnetic and semiconductor properties, can be used as promising magnetically controlled photocatalysts for the purification of aqueous media from organic pollutants. The value of the specific surface area largely affects the photocatalytic properties of the material; therefore, the possibility of its control and variation at the stage of synthesis is of great scientific and technical interest. In this study, nanocrystalline ferrite of the Zn<sub>0.5</sub>Ni<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> composition is obtained under conditions of solution combustion using various types of organic fuel as the main factor affecting the formation of the specific surface area, and subsequent heat treatment in air at a temperature of 500°C for 2 h. The crystal structure, chemical composition, and morphology of Zn<sub>0.5</sub>Ni<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> are studied by methods of X‑ray phase analysis, X-ray spectral microanalysis, and scanning electron microscopy. The values of the specific surface area of the synthesized nanopowders are calculated based on the method of liquid-phase adsorption from a Methylene Blue solution and the low-temperature adsorption-desorption of nitrogen. The results of the X‑ray phase analysis show that a single-phase nanocrystalline product with a spinel structure is formed, where the average crystallite size varies within 11–23 nm and is inversely related to the value of the specific surface area, respectively, after the reaction with succinic acid (39.1 m<sup>2</sup>/g) and with glycine (20.2 m<sup>2</sup>/g). It is established that the choice of the fuel largely affects the formation of nanocrystals and the specific surface area of the samples, and the approach used makes it possible to control its values.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"49 4","pages":"394 - 401"},"PeriodicalIF":0.7,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4561938","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}
{"title":"Relationship of Temperature Dependences of Microhardness and Enthalpy of Glass on the Example of Selenium","authors":"Shunbo Wang, Yu. S. Tver’yanovich","doi":"10.1134/S1087659623600266","DOIUrl":"10.1134/S1087659623600266","url":null,"abstract":"<p>A model is proposed that makes it possible to calculate the temperature dependence of the microhardness of glass over the entire temperature range from the softening temperature to absolute zero. The calculation uses the temperature dependence of the glass enthalpy and the value of its microhardness at the glass transition temperature. The proposed model is tested on the example of glassy selenium. For this, the temperature dependence of the microhardness of selenium on the softening temperature up to 100 K, which is 50 K below its Debye temperature, is measured. Thus, a relationship is established between the strength and thermodynamic properties of glass.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"49 4","pages":"336 - 339"},"PeriodicalIF":0.7,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4563533","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}
A. P. Shablinskii, S. K. Filatov, Y. P. Biryukov, A. A. Yuriev, L. P. Vergasova
{"title":"Thermal Expansion of Fedotovite K2Cu3O(SO4)3 and Piypite K4Cu4O(SO4)4·(Na,Cu)Cl","authors":"A. P. Shablinskii, S. K. Filatov, Y. P. Biryukov, A. A. Yuriev, L. P. Vergasova","doi":"10.1134/S1087659623600333","DOIUrl":"10.1134/S1087659623600333","url":null,"abstract":"<p>This paper presents the results of a study of the thermal behavior of fedotovite K<sub>2</sub>Cu<sub>3</sub>O(SO<sub>4</sub>)<sub>3</sub> and piypite K<sub>4</sub>Cu<sub>4</sub>O(SO<sub>4</sub>)<sub>4</sub>∙(Na,Cu)Cl minerals in a wide temperature range. The crystal structure of the holotype piypite specimen is refined at room temperature. The mechanisms of thermal expansion of minerals depending on the crystal structure are described.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"49 4","pages":"386 - 393"},"PeriodicalIF":0.7,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4563540","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}
{"title":"Thermal Expansion of Ba3Lu(BO3)3 Borate","authors":"Y. P. Biryukov, R. S. Bubnova","doi":"10.1134/S1087659623600291","DOIUrl":"10.1134/S1087659623600291","url":null,"abstract":"<p>In this study, Ba<sub>3</sub>Lu(BO<sub>3</sub>)<sub>3</sub> borate obtained by solid-phase synthesis is explored by high-temperature X-ray powder diffraction in the temperature range from 25 to 900°C. At room temperature, the compound expands slightly anisotropically (α<sub>max</sub>/α<sub>min</sub> = 1.2), and with an increase in temperature, the degree of anisotropy increases significantly (α<sub>max</sub>/α<sub>min</sub> = 6.9 at 900°C). The maximum expansion is observed along the crystallographic axis <i>c</i> (α<sub><i>c</i></sub> = 10.45 <i>×</i> 10<sup>–6</sup>°C<sup>–1</sup> at 25°C and 36.34 <i>×</i> 10<sup>–6</sup>°C<sup>–1</sup> at 900°C), perpendicular to which the boron-oxygen triangles [BO<sub>3</sub>] are located, and the minimum is in the plane where the triangles are located.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"49 4","pages":"374 - 378"},"PeriodicalIF":0.7,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4563539","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}
{"title":"The Laws of 2D-Nanofiller Aggregation in Polymer Nanocomposites","authors":"G. V. Kozlov, I. V. Dolbin, Gus. M. Magomedov","doi":"10.1134/S1087659622601009","DOIUrl":"10.1134/S1087659622601009","url":null,"abstract":"<p>The aggregation process of 2D nanofillers (organoclay and graphene oxide (GO)) is studied within the framework of micromechanical models. The degree of aggregation of these nanofillers, expressed as the number of individual plates in one aggregate (tactoid), is determined by the ratio of the nominal moduli of elasticity of the nanofiller and the matrix polymer. It is found that increasing the first of these moduli leads to an increase in the degree of aggregation, whereas increasing the second one, leads to its reduction. This means that it is practically impossible to obtain exfoliated (separate) graphene plates in a polymer matrix. Both the studied polymer/2D nanofiller nanocomposites are reinforced with separate nanofiller aggregates, which is the optimal variant of reinforcing them.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"49 4","pages":"402 - 405"},"PeriodicalIF":0.7,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4561939","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}
{"title":"Cluster Self-Organization of Intermetallic Systems: K3, K4, K5, K6, and K13 Clusters-Precursors for the Self-Assembly of U8Ni10Al36-mC54, U20Ni26-mC46, and U8Co8-cI16 Crystal Structures","authors":"V. Ya. Shevchenko, G. D. Ilyushin","doi":"10.1134/S1087659623600321","DOIUrl":"10.1134/S1087659623600321","url":null,"abstract":"<p>Using computer methods (the ToposPro software package), a combinatorial topological analysis and modeling of the self-assembly of U<sub>8</sub>Ni<sub>10</sub>Al<sub>36</sub>-<i>mC</i>54 (<i>a</i> = 15.5470 Å, <i>b</i> = 4.0610 Å, <i>c</i> = 16.4580 Å, β = 120.00°, <i>V</i> = 899.89 Å<sup>3</sup>, <i>C m</i>), U<sub>20</sub>Ni<sub>26</sub>-<i>mC</i>46 (<i>a</i> = 7.660 Å, <i>b</i> = 13.080 Å, <i>c</i> = 7.649 Å, β = 108.88°, <i>V</i> = 725.26 Å<sup>3</sup>, <i>C</i>2/<i>m</i>), and U<sub>8</sub>Co<sub>8</sub>-<i>cI</i>16 (<i>a</i> = 6.343 Å, <i>V</i> = 255.20 Å<sup>3</sup>, <i>I</i> 2<sub>1</sub>3) are carried out. For the U<sub>8</sub>Ni<sub>10</sub>Al<sub>36</sub>-<i>mC</i>54 crystal structure, 960 variants of the cluster representation of the 3D atomic grid with the number of structural units 5, 6, and 7 are established. Six crystallographically independent structural units in the form of a pyramid <i>K</i>5 = 0@Al(U<sub>2</sub>Al<sub>2</sub>), pyramid <i>K</i>6A = 0@U(NiAl<sub>4</sub>), and pyramid <i>K</i>6B = 0@U(NiAl<sub>4</sub>), as well as rings <i>K</i>3A = 0@NiAl<sub>2</sub>, <i>K</i>3B = 0@NiAl<sub>2</sub>, and <i>K</i>3C = 0@Al<sub>3</sub>, are determined. For the U<sub>20</sub>Ni<sub>26</sub>-<i>mC</i>46 crystal structure, the structural units <i>K</i>5 = Ni(Ni<sub>2</sub>U<sub>2</sub>) and icosahedra <i>K</i>13<i>=</i> Ni@Ni<sub>6</sub>U<sub>6</sub> are defined. For the crystal structure U<sub>2</sub>Co<sub>2</sub>-<i>cI</i>16, the structural units—tetrahedra <i>K</i>4 = U<sub>2</sub>Co<sub>2</sub>—are defined. The symmetry and topological code of the processes of self-assembly of 3D structures from clusters-precursors are reconstructed in the following form: primary chain → layer → framework.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"49 4","pages":"327 - 335"},"PeriodicalIF":0.7,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4563532","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}
{"title":"Johnson–Holmquist Model Parameter Determination for Tempered Glass under Impact Loading","authors":"Wenyu Cheng, Xiaomian Hu, Hao Pan","doi":"10.1134/S1087659622600193","DOIUrl":"10.1134/S1087659622600193","url":null,"abstract":"<p>Tempered glass is a transparent material that can withstand various shocks and constant loads, which is widely used in the field of safety protection. This manuscript presents the determination of Johnson–Holmquist (JH-2) model parameters for tempered glass and investigates the effect of strain rate on its strength through quasi-static and dynamic compression tests. The hydrostatic tensile pressure was indirectly determined via split tensile tests, and literature data were employed to calculate the value of HEL and EOS. The JH-2 model accurately predicted the real shapes of strain waves in the input and output bar of SHPB tests and was capable of describing the mechanical behavior of the brittle material from elasticity to fracture. The determined parameters for tempered glass were validated to represent the response to shock and impact loads.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"49 4","pages":"340 - 353"},"PeriodicalIF":0.7,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4564476","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}