Pub Date : 2023-12-01DOI: 10.1134/S1087659623600655
O. Belousova, V. A. Kuznetsova, N. Y. Fedorenko, V. L. Ugolkov, T. V. Khamova, O. Shilova
{"title":"Study on the Influence of Low Temperatures on the Physicochemical Properties of Xerogels, Powders and Ceramics Based on ZrO_2","authors":"O. Belousova, V. A. Kuznetsova, N. Y. Fedorenko, V. L. Ugolkov, T. V. Khamova, O. Shilova","doi":"10.1134/S1087659623600655","DOIUrl":"https://doi.org/10.1134/S1087659623600655","url":null,"abstract":"","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139189908","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 : 2023-12-01DOI: 10.1134/S1087659623600667
O. Belousova, A. N. Parunova, N. Y. Fedorenko, V. L. Ugolkov, T. V. Khamova, O. Shilova
{"title":"Effect of Xerogel and Powder Synthesis Conditions on the Properties of Ceramics Based on t-ZrO_2 in the ZrO_2–СeO_2–Al_2O_3 System","authors":"O. Belousova, A. N. Parunova, N. Y. Fedorenko, V. L. Ugolkov, T. V. Khamova, O. Shilova","doi":"10.1134/S1087659623600667","DOIUrl":"https://doi.org/10.1134/S1087659623600667","url":null,"abstract":"","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139191487","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 : 2023-12-01DOI: 10.1134/s1087659623601089
Abstract
Polymer dielectric composites consisting of polytetrafluoroethylene, silicon dioxide and barium titanate mixed in various proportions were successfully synthesized by low-temperature sintering. The structure of the obtained composite samples was studied by the X-ray diffraction, the electron microscopy, and the weight method. Electrical characteristics (dielectric permittivity and losses) of samples were investigated at a frequency of 1 MHz. According to structural analysis, the synthesized samples are a mixture of amorphous polytetrafluoroethylene and silicon dioxide, and crystalline ferroelectric BaTiO3, the ratio of which determines the electrical properties of the composites. Depending on the content of barium titanate, the studied samples show a permittivity from 4 to 6.5 with a dielectric loss level of 0.06–0.14. It is shown that the significant influence on the dielectric properties of the polytetrafluoroethylene/silicon dioxide/barium titanate system is exerted by heat treatment modes.
{"title":"Composite Materials Based on Polytetrafluoroethylene with SiO2 and BaTiO3 Inorganic Fillers","authors":"","doi":"10.1134/s1087659623601089","DOIUrl":"https://doi.org/10.1134/s1087659623601089","url":null,"abstract":"<span> <h3>Abstract</h3> <p>Polymer dielectric composites consisting of polytetrafluoroethylene, silicon dioxide and barium titanate mixed in various proportions were successfully synthesized by low-temperature sintering. The structure of the obtained composite samples was studied by the X-ray diffraction, the electron microscopy, and the weight method. Electrical characteristics (dielectric permittivity and losses) of samples were investigated at a frequency of 1 MHz. According to structural analysis, the synthesized samples are a mixture of amorphous polytetrafluoroethylene and silicon dioxide, and crystalline ferroelectric BaTiO<sub>3</sub>, the ratio of which determines the electrical properties of the composites. Depending on the content of barium titanate, the studied samples show a permittivity from 4 to 6.5 with a dielectric loss level of 0.06–0.14. It is shown that the significant influence on the dielectric properties of the polytetrafluoroethylene/silicon dioxide/barium titanate system is exerted by heat treatment modes.</p> </span>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140074705","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 : 2023-12-01DOI: 10.1134/s1087659623600709
Abstract
Composite materials (CMs) based on matrices of high-silica nanoporous glasses activated by silver and lanthanum are synthesized. It is established that, depending on the composition, the CM samples exhibit luminescence in the UV, violet-blue, green, red, and infrared spectral ranges due to the presence of isolated Ag+-ions, Ag+–Ag+ paired centers, molecular clusters (MCs) and nanoparticles (NPs) of silver, and oxygen vacancies in La2O3, together with various silicon defect centers.
{"title":"Luminescent Properties of Composite Materials Based on Porous Glasses Activated by Silver and Lanthanum","authors":"","doi":"10.1134/s1087659623600709","DOIUrl":"https://doi.org/10.1134/s1087659623600709","url":null,"abstract":"<span> <h3>Abstract</h3> <p>Composite materials (CMs) based on matrices of high-silica nanoporous glasses activated by silver and lanthanum are synthesized. It is established that, depending on the composition, the CM samples exhibit luminescence in the UV, violet-blue, green, red, and infrared spectral ranges due to the presence of isolated Ag<sup>+</sup>-ions, Ag<sup>+</sup>–Ag<sup>+</sup> paired centers, molecular clusters (MCs) and nanoparticles (NPs) of silver, and oxygen vacancies in La<sub>2</sub>O<sub>3</sub>, together with various silicon defect centers.</p> </span>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139056250","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 : 2023-11-16DOI: 10.1134/S1087659623600497
K. B. Aleinikova, E. N. Zinchenko, N. V. Melnikova
The atomic radial distribution function of vitreous AgGeAsSe3, obtained based on the experimental intensity curves taken with monochromatic copper and molybdenum radiation, is interpreted using a fragmentary model in the entire ordering region (~9 Å). It is shown that the glass consists of selenium and selenium-arsenic tetrahedra with germanium and silver atoms inside. The spatial arrangement of such tetrahedra in glass within the ordering region is similar to their arrangement in the GeAsSe and GeSe2 structures. It is proposed that the “openwork” structure of the fragments of these structures allows the movement of Ag+ ions (ionic conductivity) in vitreous AgGeAsSe3. Fragments of the structure of the ion-conducting compound Ag2Se are not found in the studied glass.
{"title":"Fragmentary Model of the Atomic Structure of the Ion-Conducting Semiconductor Glass AgGeAsSe3","authors":"K. B. Aleinikova, E. N. Zinchenko, N. V. Melnikova","doi":"10.1134/S1087659623600497","DOIUrl":"10.1134/S1087659623600497","url":null,"abstract":"<p>The atomic radial distribution function of vitreous AgGeAsSe<sub>3</sub>, obtained based on the experimental intensity curves taken with monochromatic copper and molybdenum radiation, is interpreted using a fragmentary model in the entire ordering region (~9 Å). It is shown that the glass consists of selenium and selenium-arsenic tetrahedra with germanium and silver atoms inside. The spatial arrangement of such tetrahedra in glass within the ordering region is similar to their arrangement in the GeAsSe and GeSe<sub>2</sub> structures. It is proposed that the “openwork” structure of the fragments of these structures allows the movement of Ag<sup>+</sup> ions (ionic conductivity) in vitreous AgGeAsSe<sub>3</sub>. Fragments of the structure of the ion-conducting compound Ag<sub>2</sub>Se are not found in the studied glass.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134796724","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 : 2023-11-16DOI: 10.1134/S1087659623600163
Rawaid Ali, Muhammad Shafi, Muhammad Khan, Shabir Ali, Taihong Huang, Muhammad Ibrar, Peng Song, Amir Zada, Jiansheng Lu
A first principle study was performed to investigate the electronic and thermostructural properties of the Ti2AlC MAX-phase using quasi-harmonic Debye approximation. The thermodynamical properties of Ti2AlC MAX-phase at various temperatures and pressure were calculated via the quasi-harmonic Debye approximation and explored the role of temperature and pressure on heat capacity, bulk modulus, thermal expansion coefficient, Debye temperature, enthalpy, entropy, and Gibbs free energy. Surprisingly, both the bulk modulus and Debye temperature was observed to drop with increase in temperature. However, a rise in both occurred as the pressure gradually builds up. This suggests that the heat capacity is influenced by pressure and temperature in opposing ways. The observation of increase in both heat capacities (Cp and Cv) due to increase in temperature infers an increase in the thermal velocity of the atoms. Consequently, the thermal velocity of the atoms decreases with a decrease in pressure which affects Cp and Cv, respectively. In addition, the Gibbs free energy slope increased at a little rate at constant pressure. These novel results possessing improved thermostructural properties could be useful for high-temperature fatigue-resistant applications specially in a gas turbine engine.
{"title":"Temperatures- and Pressure-Dependent Thermostructural Properties of Ti2AlC MAX-Phase Using Quasi-Harmonic Debye Approximation","authors":"Rawaid Ali, Muhammad Shafi, Muhammad Khan, Shabir Ali, Taihong Huang, Muhammad Ibrar, Peng Song, Amir Zada, Jiansheng Lu","doi":"10.1134/S1087659623600163","DOIUrl":"10.1134/S1087659623600163","url":null,"abstract":"<p>A first principle study was performed to investigate the electronic and thermostructural properties of the Ti<sub>2</sub>AlC MAX-phase using quasi-harmonic Debye approximation. The thermodynamical properties of Ti<sub>2</sub>AlC MAX-phase at various temperatures and pressure were calculated via the quasi-harmonic Debye approximation and explored the role of temperature and pressure on heat capacity, bulk modulus, thermal expansion coefficient, Debye temperature, enthalpy, entropy, and Gibbs free energy. Surprisingly, both the bulk modulus and Debye temperature was observed to drop with increase in temperature. However, a rise in both occurred as the pressure gradually builds up. This suggests that the heat capacity is influenced by pressure and temperature in opposing ways. The observation of increase in both heat capacities (<i>C</i><sub><i>p</i></sub> and <i>C</i><sub><i>v</i></sub>) due to increase in temperature infers an increase in the thermal velocity of the atoms. Consequently, the thermal velocity of the atoms decreases with a decrease in pressure which affects <i>C</i><sub><i>p</i></sub> and <i>C</i><sub><i>v</i></sub>, respectively. In addition, the Gibbs free energy slope increased at a little rate at constant pressure. These novel results possessing improved thermostructural properties could be useful for high-temperature fatigue-resistant applications specially in a gas turbine engine.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134796900","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 : 2023-11-16DOI: 10.1134/S1087659623600515
M. V. Timoshenko, S. V. Balabanov, M. M. Sychov
A method for reinforcing a compound based on styrene-butadiene thermoplastic elastomer has been developed. The mechanical characteristics of reinforced compounds have been studied. A comparative analysis of various methods for introducing a nanofiller into a polymer matrix has been carried out. The developed technique shows an increase in the compressive strength of the composition by 50%, as well as tensile strength by 20%.
{"title":"Influence of the Method of Graphene Introduction on Physical and Mechanical Properties of Thermoplastic Elastomers","authors":"M. V. Timoshenko, S. V. Balabanov, M. M. Sychov","doi":"10.1134/S1087659623600515","DOIUrl":"10.1134/S1087659623600515","url":null,"abstract":"<p>A method for reinforcing a compound based on styrene-butadiene thermoplastic elastomer has been developed. The mechanical characteristics of reinforced compounds have been studied. A comparative analysis of various methods for introducing a nanofiller into a polymer matrix has been carried out. The developed technique shows an increase in the compressive strength of the composition by 50%, as well as tensile strength by 20%.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134796903","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}
Utilizing mining and metallurgical waste as a resource is one of the effective methods to tackle the issue of solid waste accumulation. In this study, the CaO–MgO–Al2O3–SiO2 system glass–ceramics were prepared based on the traditional melt-casting technique using iron ore slag as the main raw material. Investigations were done on how different iron ion concentrations affected glass–ceramics properties. And the migration pattern of iron ions was explored deeply using Raman spectroscopy and FTIR. XRD revealed the crystallization ability of augite and magnetite increasing as the iron ions grew. The combination of vibrating sample magnetometer, electron backscatter diffraction, and MFM techniques indicates that the distribution of magnetite, grain size, and structure are connected to the magnetic performances of glass–ceramics. Glass–ceramics has outstanding magnetic properties and flexural strength. Therefore, it has vast potential for future development in electronic devices, wear-resistant applications, and electromagnetic shielding.
{"title":"Migration Mechanism and Magnetic Properties of Fe Ions in Glass–Ceramics of an Iron-Rich CMAS System","authors":"Wence Xu, Zhao Cao, Rui Ma, Yuxuan Zhang, Nannan Wu, Shunli Ouyang","doi":"10.1134/S1087659623600072","DOIUrl":"10.1134/S1087659623600072","url":null,"abstract":"<p>Utilizing mining and metallurgical waste as a resource is one of the effective methods to tackle the issue of solid waste accumulation. In this study, the CaO–MgO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub> system glass–ceramics were prepared based on the traditional melt-casting technique using iron ore slag as the main raw material. Investigations were done on how different iron ion concentrations affected glass–ceramics properties. And the migration pattern of iron ions was explored deeply using Raman spectroscopy and FTIR. XRD revealed the crystallization ability of augite and magnetite increasing as the iron ions grew. The combination of vibrating sample magnetometer, electron backscatter diffraction, and MFM techniques indicates that the distribution of magnetite, grain size, and structure are connected to the magnetic performances of glass–ceramics. Glass–ceramics has outstanding magnetic properties and flexural strength. Therefore, it has vast potential for future development in electronic devices, wear-resistant applications, and electromagnetic shielding.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134796988","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 : 2023-11-16DOI: 10.1134/S1087659623600461
V. Ya. Shevchenko, G. D. Ilyushin
Using computer methods (ToposPro software package), a combinatorial topological analysis and modeling of the self-assembly of the following crystal structures are carried out: Y20Cu20Mg64-oC104 (a = 4.136 Å, b = 19.239 Å, c = 29.086 Å, V = 2314.45 Å3, Cmcm), Y20Cu20Mg52-oC92 (a = 4.097 Å, b = 19.279 Å, c = 25.790 Å, V = 2037.30 Å3, Cmcm), and Y3(NiAl3)Ge2-hP9 (a = b = 6.948 Å, c = 4.156 Å, V = 173.78 5 Å3, P-62m). For the Y20Cu20Mg64-oC104 crystal structure, 52 variants of the cluster representation of the 3D atomic network with the 3, 4, and 5 structural units are established. Four crystallographically independent structural units in the form of a tetrahedron are determined: tetrahedron K4 = 0@CuMg3, tetrahedron K4 = 0@YMg3, tetrahedron K4 = 0@YCuMg2, and a supratetrahedron K6 = 0@YCu2Mg3. A variant of self-assembly with the participation of hexamers from six linked structural units is considered (K4B+ K4C)(K4A+ K6)(K4B+ K4C). For the Y20Cu20Mg64-oC92 crystal structure, 27 variants of cluster representation of the 3D atomic mesh with 3, 4, and 5 structural units are established. Three crystallographically independent structural units in the form of a tetrahedron are determined: tetrahedron K4 = 0@YCuMg2, cluster K6 = 0@6(Y2Mg4) in the form of double tetrahedrons YMg3, and a nine-atom supratetrahedron K9 = Mg@Y2Cu2Mg4 consisting of two YMg2Cu and two YMg3 tetrahedrons. A variant of the self-assembly involving trimers of three structural units K4+ K6+ K9 is considered. For the Y3(NiAl3)Ge2-hP9 crystal structure, eight variants of decomposition of the 3D atomic mesh into cluster structures with the participation of two structural units are established. A variant of the self-assembly with the participation of packing generatrices of seven-atom clusters-precursors K7 = 0@Y3(NiAl3) with the participation of Ge atoms-spacers is considered. The symmetry and topological code of the self-assembly processes of 3D-structures is reconstructed from clusters-precursor in the following form: primary chain → layer → framework.
利用计算机方法(ToposPro软件包),组合拓扑分析和建模的自组装进行晶体结构:Y20Cu20Mg64-oC104 (a = 4.136 a, b = 19.239 a, c = 29.086 V = 2314.45 A3, Cmcm), Y20Cu20Mg52-oC92 (a = 4.097 a, b = 19.279 a, c = 25.790 V = 2037.30 A3, Cmcm),和Y3 (NiAl3) Ge2-hP9 (a = b = 6.948 a, c = 4.156, 173.78 V = 5 A3, p - 62 m)。对于Y20Cu20Mg64-oC104晶体结构,建立了以3、4、5为结构单元的三维原子网络簇表示的52种变体。确定了四个晶体学独立的四面体结构单元:四面体K4 = 0@CuMg3,四面体K4 = 0@YMg3,四面体K4 = 0@YCuMg2,超四面体K6 = 0@YCu2Mg3。自组装的一个变种与六聚体的参与从六个连接的结构单元(K4B+ K4C)(K4A+ K6)(K4B+ K4C)。对于Y20Cu20Mg64-oC92晶体结构,分别建立了3、4、5个结构单元的三维原子网格簇表示的27种变体。确定了三个晶体独立的四面体结构单元:四面体K4 = 0@YCuMg2,双四面体YMg3形式的团簇K6 = 0@6(Y2Mg4),由两个YMg2Cu和两个YMg3四面体组成的九原子超四面体K9 = Mg@Y2Cu2Mg4。自组装的一种变体涉及三个结构单元K4+ K6+ K9的三聚体。对于Y3(NiAl3)Ge2-hP9晶体结构,建立了8种由两个结构单元参与的三维原子网格簇状结构分解变体。考虑了一种由七原子团簇-前驱体K7 = 0@Y3(NiAl3)的填充生成和锗原子-间隔层参与的自组装变体。三维结构自组装过程的对称性和拓扑编码由簇-前驱体重构为:主链→层→框架。
{"title":"Cluster Self-Organization of Intermetallic Systems: Clusters-Precursors K4, K6, and K7 for the Self-Assembly of Crystal Structures Y20Cu20Mg64-oC104, Y20Cu20Mg52-oC92, and Y3(NiAl3)Ge2-hP9","authors":"V. Ya. Shevchenko, G. D. Ilyushin","doi":"10.1134/S1087659623600461","DOIUrl":"10.1134/S1087659623600461","url":null,"abstract":"<p>Using computer methods (ToposPro software package), a combinatorial topological analysis and modeling of the self-assembly of the following crystal structures are carried out: Y<sub>20</sub>Cu<sub>20</sub>Mg<sub>64</sub>-<i>oC</i>104 (<i>a</i> = 4.136 Å, <i>b</i> = 19.239 Å, <i>c</i> = 29.086 Å, <i>V</i> = 2314.45 Å<sup>3</sup>, <i>Cmcm</i>), Y<sub>20</sub>Cu<sub>20</sub>Mg<sub>52</sub>-<i>oC</i>92 (<i>a</i> = 4.097 Å, <i>b</i> = 19.279 Å, <i>c</i> = 25.790 Å, <i>V</i> = 2037.30 Å<sup>3</sup>, <i>Cmcm</i>), and Y<sub>3</sub>(NiAl<sub>3</sub>)Ge<sub>2</sub>-<i>hP</i>9 (<i>a</i> = <i>b</i> = 6.948 Å, <i>c</i> = 4.156 Å, <i>V</i> = 173.78 5 Å<sup>3</sup>, <i>P</i>-62<i>m</i>)<i>.</i> For the Y<sub>20</sub>Cu<sub>20</sub>Mg<sub>64</sub>-<i>oC</i>104 crystal structure, 52 variants of the cluster representation of the 3D atomic network with the 3, 4, and 5 structural units are established. Four crystallographically independent structural units in the form of a tetrahedron are determined: tetrahedron <i>K</i>4 = 0@CuMg3, tetrahedron <i>K</i>4 = 0@YMg3, tetrahedron <i>K</i>4 = 0@YCuMg<sub>2</sub>, and a supratetrahedron <i>K</i>6 = 0@YCu2Mg3. A variant of self-assembly with the participation of hexamers from six linked structural units is considered (<i>K</i>4B+ <i>K</i>4C)(<i>K</i>4A+ <i>K</i>6)(<i>K</i>4B+ <i>K</i>4C). For the Y<sub>20</sub>Cu<sub>20</sub>Mg<sub>64</sub>-<i>oC</i>92 crystal structure, 27 variants of cluster representation of the 3<i>D</i> atomic mesh with 3, 4, and 5 structural units are established. Three crystallographically independent structural units in the form of a tetrahedron are determined: tetrahedron <i>K</i>4 = 0@YCuMg<sub>2</sub><i>,</i> cluster <i>K</i>6 = 0@6(Y<sub>2</sub>Mg<sub>4</sub>) in the form of double tetrahedrons YMg<sub>3</sub>, and a nine-atom supratetrahedron <i>K</i>9 = Mg@Y<sub>2</sub>Cu<sub>2</sub>Mg<sub>4</sub> consisting of two YMg<sub>2</sub>Cu and two YMg<sub>3</sub> tetrahedrons. A variant of the self-assembly involving trimers of three structural units <i>K</i>4+ <i>K</i>6+ <i>K</i>9 is considered. For the Y<sub>3</sub>(NiAl<sub>3</sub>)Ge<sub>2</sub>-<i>hP</i>9 crystal structure, eight variants of decomposition of the 3D atomic mesh into cluster structures with the participation of two structural units are established. A variant of the self-assembly with the participation of packing generatrices of seven-atom clusters-precursors <i>K</i>7 = 0@Y<sub>3</sub>(NiAl<sub>3</sub>) with the participation of Ge atoms-spacers is considered. The symmetry and topological code of the self-assembly processes of 3<i>D</i>-structures is reconstructed from clusters-precursor 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":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134796722","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 : 2023-11-16DOI: 10.1134/S1087659623600527
S. N. Kapustin, M. K. Eseev, Yu. V. Tsykareva, V. I. Voshchikov, D. S. Lugvishchuk
A method is proposed for increasing the resistance of a superhydrophobic coating based on a CNT xerogel to frost deposition through the use of decorating nanoparticles. The effects of the addition of fullerenes, carbon nanoonions (CNOs), detonation nanodiamonds, silicon dioxide, and paraffin to the xerogel are tested. An increase in the resistance of the coating to the deposition of condensate in the form of frost is revealed. The addition of fullerene C60 leads to the best results. Increasing the resistance to icing allows us to spend less power on heating the surface during short cold snaps, bypassing the anti-icing properties of the protective superhydrophobic layer. However, the application of this approach shows a deterioration in the resistance of the coating to the penetration of the spray. This is given a qualitative explanation and measures to combat it are proposed. No effect of the additives on the mechanical properties of the coating or its resistance to damage is detected. In additon, decorating additives affect the formation of the coating relief. With this, it is possible to influence the stochastic processes of the formation of roughness during the drying of the xerogel.
{"title":"Superhydrophobic Coating Based on Decorated Carbon Nanoparticles","authors":"S. N. Kapustin, M. K. Eseev, Yu. V. Tsykareva, V. I. Voshchikov, D. S. Lugvishchuk","doi":"10.1134/S1087659623600527","DOIUrl":"10.1134/S1087659623600527","url":null,"abstract":"<p>A method is proposed for increasing the resistance of a superhydrophobic coating based on a CNT xerogel to frost deposition through the use of decorating nanoparticles. The effects of the addition of fullerenes, carbon nanoonions (CNOs), detonation nanodiamonds, silicon dioxide, and paraffin to the xerogel are tested. An increase in the resistance of the coating to the deposition of condensate in the form of frost is revealed. The addition of fullerene C<sub>60</sub> leads to the best results. Increasing the resistance to icing allows us to spend less power on heating the surface during short cold snaps, bypassing the anti-icing properties of the protective superhydrophobic layer. However, the application of this approach shows a deterioration in the resistance of the coating to the penetration of the spray. This is given a qualitative explanation and measures to combat it are proposed. No effect of the additives on the mechanical properties of the coating or its resistance to damage is detected. In additon, decorating additives affect the formation of the coating relief. With this, it is possible to influence the stochastic processes of the formation of roughness during the drying of the xerogel.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134878366","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}