Glass Physics and Chemistry最新文献

{"title":"Structural, Optical and Electrical Properties of Aluminum Sodium Phosphate Glasses","authors":"A. A. Elbakey,&nbsp;M. E. Sayed,&nbsp;N. F. Osman,&nbsp;Ahmed R. Wassel,&nbsp;H. A. Zayed","doi":"10.1134/S1087659624600121","DOIUrl":"10.1134/S1087659624600121","url":null,"abstract":"<p>By using the conventional melt quenching technique, the transparent glasses 55P₂O₅–35Na₂O–10Al₂O₃ (mol %) were prepared. Structural study has been investigated by using X-ray diffraction (XRD) and (EDAX) and it was found that the prepared samples were amorphous structure. Using the differential thermal analysis (DTA), the glass transition (<i>T</i>_g) and crystallization temperature (<i>T</i>_c) were determined, and the results show that the prepared glass samples exhibit thermal stability <i>h</i> '. Density, molar volume and oxygen packing density ensure that Al₂O₃ is incorporated in sodium phosphate glass. The dc, ac electrical conductivity and dielectric constants of the prepared glass samples have been investigated at frequency range (from 50 Hz to 5 MHz) and temperature <i>T</i> (from 303 to 443 K). The temperature dependence of the dc conductivity of prepared glasses follows the Arrhenius law. It was found that the values of activation energy Δ<i>E</i>_dc = 2.3 eV. The Cole–Cole plot was used to examine the conductivity mechanism for grain resistance. The results of the ac conductivity σ_ac and its frequency exponent (<i>s</i>) have been analyzed to determine the conduction mechanism. The exponent (<i>s</i>) has values between 0.42–0.8; consequently the (CBH) seems to be the most interesting model related to the obtained results.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"50 6","pages":"631 - 638"},"PeriodicalIF":0.8,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676450","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":"Modification of SiO2 Nanoparticles by Bifunctional Silanes","authors":"E. N. Evdokimova,&nbsp;T. A. Kochina","doi":"10.1134/S1087659624600662","DOIUrl":"10.1134/S1087659624600662","url":null,"abstract":"<p>SiO₂ nanoparticles modified with three bifunctional silanes—3-(trimethoxysilylpropyl) methacrylate, bis[3-(trimethoxysilyl)propyl]amine, and vinyltriethoxysilane—are obtained. Successful completion of the modification is confirmed by IR spectroscopy and scanning electron microscopy. In order to obtain coatings with increased hydrophobicity, modified SiO₂ nanoparticles are introduced into cycloaliphatic epoxy resin. To improve the physical and mechanical properties, the coating composition contains 30 wt % modified SiO₂ nanoparticles fillers are introduced: muscovite mica and titanium dioxide. It is shown that the most promising additive for obtaining hydrophobic coatings are SiO₂ nanoparticles modified by bis[3-(trimethoxysilyl)propyl]amine. When they are introduced in the epoxy-polymethylmethoxysilsesquioxane matrix in an amount of 40 wt %, the highest contact angle of wetting of 116° is observed.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"50 6","pages":"687 - 694"},"PeriodicalIF":0.8,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676453","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":"Investigation on the Effect of Withdrawal Speed on Laser Induced Damage Performance of TiO2 Thin Films","authors":"Hind Laouamri,&nbsp;Imene Kebabi,&nbsp;Kouider Ferria","doi":"10.1134/S1087659625600036","DOIUrl":"10.1134/S1087659625600036","url":null,"abstract":"<p>In this work TiO₂ thin films are deposited on glass substrates by sol gel dip coating process. The effect of withdrawal speed on the properties and laser induced damage is investigated. Structural analysis showed that the TiO₂ films exhibited the amorphous phase. The film thickness, roughness and transmittance are found to be related to the withdrawal speed. AFM microscopy revealed that the layers were homogeneous, with no cracks on the sample surface. Evaluation of laser flux resistance showed that the damage threshold (LIDT) is inversely proportional to film thickness, and the damage mechanism is thermal melting.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"50 6","pages":"668 - 673"},"PeriodicalIF":0.8,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676454","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":"Study of Properties of Model Borosilicate Glasses with Various Contents of a Cesium–Strontium Fraction for the Development of Technical Requirements","authors":"A. Yu. Nikulina,&nbsp;E. V. Polyakov,&nbsp;M. B. Remizov,&nbsp;P. V. Kozlov,&nbsp;A. A. Maltsev,&nbsp;E. S. Braichun,&nbsp;K. A. Dzhevello","doi":"10.1134/S1087659624601187","DOIUrl":"10.1134/S1087659624601187","url":null,"abstract":"<p>Model borosilicate glasses of four compositions with different contents of the cesium–strontium fraction are synthesized. The following properties of glass are studied: melting temperature, glass density, compressive strength, homogeneity, and thermal and chemical resistance. Based on the obtained experimental data, technical requirements are developed for samples of a solidified short-lived fraction of high-level waste (HLW).</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"50 5","pages":"572 - 580"},"PeriodicalIF":0.8,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676222","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":"Novel Red-Emitting BaBi2B2O7:Sm3+ and BaBi2B2O7:Sm3+,Eu3+ Co-Doped Phosphors: Study of the Crystal Structure, Luminescence and Thermal Expansion","authors":"S. V. Demina,&nbsp;A. P. Shablinskii,&nbsp;R. S. Bubnova,&nbsp;A. V. Povolotskiy,&nbsp;M. S. Avdontceva,&nbsp;V. L. Ugolkov,&nbsp;S. K. Filatov","doi":"10.1134/S1087659624600911","DOIUrl":"10.1134/S1087659624600911","url":null,"abstract":"<p>The novel polycrystalline phosphors BaBi_{2 − <i>x</i>}Sm_<i>x</i>B₂O₇ (<i>х</i> = 0.05, 0.1, 0.15, 0.2, 0.3, 0.4, 0.5), BaBi_{2 − <i>x</i> − 0.05}Eu_<i>x</i>Sm_0.05B₂O₇ (<i>х</i> = 0.35, 0.4, 0.45) and BaBi_{2 − 0.15 − <i>y</i>}Eu_0.15Sm_<i>y</i>B₂O₇ (<i>y</i> = 0.05, 0.1, 0.15, 0.2, 0.3) were obtained by crystallization from a glass-ceramics. The BaBi_1.95Sm_0.05B₂O₇ and BaBi_1.7Sm_0.3B₂O₇ crystal structures were refined by single crystal X-ray diffraction data to <i>R</i> = 0.059 and 0.054 respectively. The distribution of the Sm³⁺ ions over cation sites was investigated, and the Sm³⁺ atoms occupy the <i>M</i>2 site in the Bi subposition. Thermal expansion of BaBi_1.7Sm_0.3B₂O₇ was investigated by high-temperature powder X-ray diffraction. The maximum thermal expansion is along the <i>c</i> axis. Such a character of the thermal expansion can be related to the preferred orientation of the BO₃ radicals located in the <i>ab</i> plane. Borates are thermally stable in the studied temperature range. Thermal analysis of the BaBi_1.7Sm_0.3B₂O₇ borate was performed using differential scanning calorimetry and thermogravimetry. No mass loss was observed according to thermogravimetry data. In comparison with glass ceramics BaBi₂B₂O₇, it can be concluded that activation of the crystal matrix by Sm³⁺ ions leads to an increase in the crystallization temperature from the melt from 540 to 660°C and an insignificant increase in the melting temperature from 630 to 635°C. Luminescence spectra, excitation and kinetic curves of the BaBi_2−<i>x</i>Sm_<i>x</i>B₂O₇, BaBi_{2 − <i>x</i> − 0.05}Eu_<i>x</i>Sm_0.05B₂O₇ and BaBi_{2 − 0.15 − <i>y</i>}Eu_0.15Sm_<i>y</i>B₂O₇ series are reported. The maximum luminescence intensity of BaBi_{2 − <i>x</i>}Sm_<i>x</i>B₂O₇ and BaBi_{2 − 0.15 − <i>y</i>}Eu_0.15Sm_<i>y</i>B₂O₇ concentration series is observed for the <i>x</i> = 0.05 and <i>x</i> = 0.10 respectively. The novel BaBi_{2 − <i>x</i> − 0.05}Eu_<i>x</i>Sm_0.05B₂O₇ and BaBi_{2 − 0.15 − <i>y</i>}Eu_0.15Sm_<i>y</i>B₂O₇ solid solutions is a promising tunable red-emitting phosphors.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"50 5","pages":"581 - 598"},"PeriodicalIF":0.8,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676224","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":"Ceramic Composites Based on Zircon and Hafnium Oxide","authors":"V. L. Ugolkov,&nbsp;N. A. Koval’chuk,&nbsp;A. V. Osipov,&nbsp;L. P. Mezentseva","doi":"10.1134/S1087659624600893","DOIUrl":"10.1134/S1087659624600893","url":null,"abstract":"<p>By sintering nanosized powders in air in the range of 1000–1300°C, ceramic composites (1 – <i>x</i>)ZrSiO₄–<i>x</i>HfO₂ with low thermal conductivity are obtained. It is shown that at a temperature of 1300°C the composites are a mixture of monoclinic solid solutions of Hf_<i>x</i>Zr_{1 – <i>x</i>}O₂ and SiO₂. For the first time, the temperature–concentration dependencies of the thermal conductivity of the obtained ceramic samples are presented. Using electron microscopy, the fracture surface of ceramic samples after sintering at 1300°C is investigated, their thermal behavior is studied using dilatometry, and the temperature coefficient of linear expansion is estimated.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"50 6","pages":"681 - 686"},"PeriodicalIF":0.8,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676281","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":"Comparison of Mesoporous Silica SBA-15 Synthesized from Amorphous Silica Powder and Silicon Alkoxide","authors":"K. Shiraishi,&nbsp;T. Hongo","doi":"10.1134/S1087659624601096","DOIUrl":"10.1134/S1087659624601096","url":null,"abstract":"<p>The development of an inexpensive and environmentally friendly method for synthesis of mesoporous silica is highly desirable. In this study, mesoporous silica SBA-15 (SP-SBA-15) was synthesized using inexpensive amorphous silica powder, which is produced industrially, as the silica source. SP-SBA-15 was compared to SBA-15 (TO-SBA-15) synthesized by a conventional method using tetraethyl orthosilicate (TEOS) as the silica source. SP-SBA-15 was found to have 8.1 nm uniform mesopores arranged in a well-defined hexagonal honeycomb structure, and the mesostructure was found to be almost identical to that of TO-SBA-15. However, the specific surface area of SP-SBA-15 was found to be 525.0 m²/g, which is lower than that of TO-SBA-15. This is due to the fact that fewer micropores were formed in the SBA-15 when silica powder was used as the silica source.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"50 5","pages":"504 - 510"},"PeriodicalIF":0.8,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676367","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, and K6 Clusters-Precursors for the Self-Assembly of Crystal Structures of the Ce4Pt14Si8-oP52 and Ce6Pd8Sn12-oP52 Family","authors":"V. Ya. Shevchenko,&nbsp;G. D. Ilyushin","doi":"10.1134/S1087659624600844","DOIUrl":"10.1134/S1087659624600844","url":null,"abstract":"<p>Using computer methods (ToposPro software package), a combinatorial-topological analysis and modeling of the self-assembly of crystalline structures of the Ce₄Pt₁₄Si₈-<i>oP</i>52 (<i>a</i> = 19.633 Å, <i>b</i> = 4.036 Å, <i>c</i> = 11.224 Å, <i>V</i> = 889.4 ų) and Ce₆Pd₈Sn₁₂-<i>oP</i>52 (<i>a</i> = 27.701 Å, <i>b</i> = 4.614 Å, <i>c</i> = 9.371 Å, <i>V</i> = 1198.02 ų) family are carried out. For the crystal structure of Ce₄Pt₁₄Si₈-<i>oP</i>52, 21 variants of the allocation of cluster structures with the number of clusters <i>N</i> = 2 (6 variants) and 3 (9 variants), and 3 (6 variants) are established. A variant of the self-assembly of a crystal structure with the participation of clusters-precursors forming the following packing is considered: double tetrahedra <i>K</i>6 = 0@6 (Ce₂Pt₂Si₂) with symmetry <i>g</i> = –1, tetrahedra <i>K</i>4 = 0@4 (CePt₂Si), and rings <i>K</i>3 = 0@3 (Pt₂Si). For the crystal structure of Ce₆Pd₈Sn₁₂-<i>oP</i>52, 27 variants of the allocation of cluster structures with the number of clusters <i>N</i> = 2 (6 variants), 3 (11 variants), and 4 (10 variants) are established. A variant of the self-assembly of a crystal structure with the participation of clusters-precursors forming the following packing is considered: double tetrahedra <i>K</i>6 = 0@6 (Ce₂Pd₂Sn₂) with symmetry <i>g</i> = –1, rings <i>K</i>3 = 0@3 (CePdSn), rings <i>K</i>3 = 0@3 (PdSn₂), and spacer atoms Sn. The symmetry and topology code of the self-assembly processes of 3D Ce₄Pt₁₄Si₈-<i>oP</i>52 and Ce₆Pd₈Sn₁₂-<i>oP</i>52 structures are reconstructed from clusters-precursors in the following form: primary chain → layer → framework.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"50 5","pages":"453 - 460"},"PeriodicalIF":0.8,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676501","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":"Precursors of Al2O3–ZrO2–LnxOy Oxide Systems Obtained Using Electrogenerated Reagents","authors":"E. V. Petrova,&nbsp;A. F. Dresvyannikov,&nbsp;L. I. Kashfrazyeva","doi":"10.1134/S1087659624600479","DOIUrl":"10.1134/S1087659624600479","url":null,"abstract":"<p>Scientific principles for the synthesis of precursors of nanostructured oxide systems Al₂O₃–ZrO₂–Ln_<i>x</i>O_<i>y</i> ((Ln = Dy, Nd) are developed. The features of their formation under conditions of rapid mixing of electrogenerated reagents, implemented in a diaphragm-free coaxial reactor-electrolyzer, are studied. The methods of potentiodynamic polarization curves, X-ray diffractometry, X-ray fluorescence, synchronous thermal analysis, and laser diffraction are used to study the anodic processes occurring in the electrolyzer, the morphology of particles formed in the solution and transformed during heat treatment, as well as the phase, granulometric, and elemental compositions of precursors and oxide systems. The proposed approach allows obtaining oxide systems modified with rare earth elements based on the Al₂O₃–ZrO₂ binary system, characterized by the presence of a stabilized phase of tetragonal zirconium dioxide. REE atoms present in the studied systems—Nd and Dy—stabilize <i>t</i>-ZrO₂ and, apparently, occupy the positions of crystal lattice nodes, isomorphically replacing Zr⁴⁺. The latter is indicated by the broadening of the corresponding reflections of X‑ray diffraction patterns. It indirectly indicates the presence of microstresses in the microcrystals of the phases. The latter can be caused by distortions of the crystal lattices of aluminum and zirconium oxides as a result of the substitution of metal atoms by REE atoms.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"50 6","pages":"660 - 667"},"PeriodicalIF":0.8,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676411","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, Dielectric and AC Conductivity Studies of Alkaline Earth Borobismuthate Glasses Doped with Transition Metal Ions","authors":"Pavan Kumar Pothuganti,&nbsp;Ashok Bhogi,&nbsp;Boora Srinivas,&nbsp;Muralidhara Reddy Kalimi,&nbsp;Padmasuvarna Renuguntla","doi":"10.1134/S1087659624600133","DOIUrl":"10.1134/S1087659624600133","url":null,"abstract":"<p>Glasses containing compositions of BaO–Bi₂O₃–B₂O₃–TMI (V₂O₅, MnO) were prepared and subjected to thorough analysis through differential scanning calorimetry (DSC), dielectric measurements and AC conductivity studies. The DSC investigations unveiled a noteworthy trend of an increase in TMI content correlated with a decrease in the glass transition temperature. Delving deeper into the properties of the prepared samples, the frequency dependence of dielectric constant and dielectric loss were explored. The investigation uncovered that AC conductivity experiences an augmentation at low and intermediate frequencies, plateauing at higher frequencies. Addition of TMI into the glass network induced a discernible rise in AC conductivity. Further investigation of the samples revealed a non-Debye behavior, a conclusion substantiated by the suppressed Cole–Cole plots and corroborated by electric modulus studies. Intriguingly, the addition of a minute concentration of TMI, whether it is vanadium or manganese, did not exert an influence on the relaxation time of ions. However, it exerts an impact on the dissipation energy of the samples, thus attesting to the nuanced and specific role played by TMI in modulating the electrical properties of the glass network.</p>","PeriodicalId":580,"journal":{"name":"Glass Physics and Chemistry","volume":"50 4","pages":"374 - 389"},"PeriodicalIF":0.8,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533045","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}