Journal of Non-crystalline Solids最新文献

{"title":"Crystallization behavior and microstructure of ZnO–Al2O3–SiO2–B2O3-based glass-ceramics using MgO and CaO modifiers","authors":"Jiwon Choi,&nbsp;Kangduk Kim","doi":"10.1016/j.jnoncrysol.2024.123230","DOIUrl":"10.1016/j.jnoncrysol.2024.123230","url":null,"abstract":"<div><p>The role of glass-structure modifiers was examined by analyzing the crystallization behavior and microstructure of a ZnO–Al₂O₃–SiO₂–B₂O₃ glass system with MgO and CaO substitutions. Differential thermal analysis indicated that the crystallization temperature (T_p) increased with MgO substitution but decreased with CaO substitution. X-ray diffraction analysis demonstrated that increasing the amounts of MgO and CaO led to the formation of a gahnite crystalline phase after treatment at 1200 °C. Nano-sized crystals were observed when the specimen was heat-treated at 1000 °C, and dendrite crystals were observed on the surface when treated at 1200 °C. Non-isothermal analysis revealed that the substitution with MgO and CaO resulted in surface crystallization behaviors with high activation energies (271.72 and 301.75 k·J·mol^-1) and low Avrami constants (2.05 and 1.67). Micro-Vickers hardness showed maximum values of 7.65 and 6.86 GPa when MgO and CaO were substituted, respectively.</p></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"646 ","pages":"Article 123230"},"PeriodicalIF":3.2,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142239509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and thermo-mechanical properties of modified gelatin reinforced SiO2 aerogels","authors":"Wang Zhan ,&nbsp;Jinhong Mo ,&nbsp;Fan Shi ,&nbsp;Zhiyuan Xu ,&nbsp;Le Chen ,&nbsp;Lixia Li ,&nbsp;Ru Zhou ,&nbsp;Mingyi Chen ,&nbsp;Junchen Jiang","doi":"10.1016/j.jnoncrysol.2024.123222","DOIUrl":"10.1016/j.jnoncrysol.2024.123222","url":null,"abstract":"<div><p>Due to the poor mechanical properties of SiO₂ aerogels, this study prepared the composite aerogels using the co-gel method with modified gelatin and SiO₂ sol. Gelatin is used as a reinforcing phase to enhance the performance of the composite aerogels. The study investigated the impact of varying concentrations of gelatin (1.7 %, 1.9 %, 2.1 %, 2.3 %) and silane coupling agent (1 %, 1.5 %, 2 %, 2.5 %, 3 %) on the thermal-mechanical properties of the composite aerogels. Various tests were conducted to assess the thermal-mechanical properties of the composite aerogels, including thermal stability, thermal conductivity, compression resistance, and fire-retardant. Additionally, the surface morphology and chemical composition were analyzed using SEM, TEM, FTIR, and XRD to explore the correlation with the thermal-mechanical properties. The results indicated that the composite aerogels exhibited outstanding overall performance with 2.1 % gelatin and 3 % silane coupling agent.</p></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"646 ","pages":"Article 123222"},"PeriodicalIF":3.2,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142239512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cost effective glass-ceramics containing Bi2Ti2O7 nanocrystals for photocatalytic degradation of RhB","authors":"Jinxu Jiao,&nbsp;Junjie Zhou,&nbsp;Wei Liu,&nbsp;Dusha Luo,&nbsp;Dehua Xiong,&nbsp;Hong Li","doi":"10.1016/j.jnoncrysol.2024.123229","DOIUrl":"10.1016/j.jnoncrysol.2024.123229","url":null,"abstract":"<div><p>The low-cost glass-ceramics catalyst can promote the application of photocatalysis technology in water pollution treatment. This study successfully synthesized cost-effective glass-ceramics containing nano-sized spherical Bi₂Ti₂O₇ through a glass powder crystallization method. The photocatalytic efficiency of glass-ceramics catalyst prepared by different crystallization processes was evaluated by RhB dye. Furthermore, the factors affecting the photocatalytic efficiency of glass-ceramics were analyzed by crystallization mechanism, transmission electron microscope (TEM) and X-ray photoelectron spectra (XPS). Under visible light irradiation, the glass-ceramics catalyst prepared by the best crystallization process can achieve photocatalytic degradation rate of 99.3 % within 300 min. This study shows that glass-ceramics catalyst can be rendered as one of the most suitable candidates for photocatalytic degradation of organic pollutants.</p></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"646 ","pages":"Article 123229"},"PeriodicalIF":3.2,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142239513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of novel Sm3+ doped Li2O-Bi2O3-Al2O3-TeO2 glass system: Optical properties, Judd-Ofelt analysis, and photoluminescence mechanism","authors":"A.Z. Shah ,&nbsp;M.H.M. Zaid ,&nbsp;K.A. Matori ,&nbsp;Z.W. Loh ,&nbsp;R. Hisam ,&nbsp;W.M. Cheong ,&nbsp;S.A.A. Wahab","doi":"10.1016/j.jnoncrysol.2024.123226","DOIUrl":"10.1016/j.jnoncrysol.2024.123226","url":null,"abstract":"<div><p>A new series of 20Li₂O‒1Bi₂O₃‒5Al₂O₃‒(74-<em>x</em>)TeO₂‒<em>x</em>Sm₂O₃ glasses varying <em>x</em> with 0 to 2.0 mol%, was fabricated via the melt and quenching method. The X-ray diffraction confirmed the glass's amorphous nature, while utilizing FTIR absorption spectra, the relative areas of TeO₄ and TeO₃ were found in the range of 0.10695 to 0.19274 and 0.89305 to 0.80726, respectively, to justify the BO's and NBO's formation in the glass network. It is denoted that the BO is increasing with the progress of Sm³⁺ concentration even though the glass system is rich in NBO. The optical behavior of the glasses was investigated using UV-Visible, and photoluminescence spectroscopy. Through Tauc's plot analysis, the indirect band gap is increasing from 2.210 to 2.768 eV due to the BO's formation. The bonding parameter reveals the ionic bonding between Sm³⁺ ions and surrounding ligands. However, upon Sm³⁺ addition, a reduction in ionic bonding is observed. The calculated Judd-Ofelt, Ω₂ displays a decreasing value ranging from 7.25 to 4.98 × 10^-20cm². The Judd-Ofelt oscillator strength reveals a reduction from 7.03 × 10^-6 to 4 × 10^-6, suggesting the increment of BOs in the host matrix has reduced the asymmetry and the covalency of the Sm³⁺ ion with the local environment ligand. Photoluminescence spectra excited at 410 nm reveal 4 major emission peaks of ⁴G_5/2→⁶H_5/2, ⁴G_5/2→⁶H_7/2, ⁴G_5/2→⁶H_9/2, and ⁴G_5/2→⁶H_11/2. The emission intensity has enhanced with Sm₂O₃ addition. However, above 1.5 mol% of Sm₂O₃ concentration, the emission decreased due to the luminescent quenching effect.</p></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"646 ","pages":"Article 123226"},"PeriodicalIF":3.2,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142239511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Ni-reinforcement size on mechanical properties of Al metallic glass matrix from molecular dynamics","authors":"S. Bogtob,&nbsp;A. Samiri,&nbsp;A. Khmich,&nbsp;A. Hasnaoui","doi":"10.1016/j.jnoncrysol.2024.123211","DOIUrl":"10.1016/j.jnoncrysol.2024.123211","url":null,"abstract":"<div><p>We study the mechanical behavior of Aluminum metallic glass (Al-MG) and Al-based matrix nanocomposites (NCs) using molecular dynamics (MD) simulations within the framework of the Embedded Atom method (EAM). In terms of mechanical properties, metallic glass (MGs) are characterized by high performance, such as high yield strength and high strength, long-range atomic order is the main feature that links these mechanical properties to the structure of MGs. In the present work, the atomic structural characteristic of Al-MG is studied via several quantities such as radial distribution function (RDF), Voronoi tessellation analysis (VTA) and coordination number distribution (CN). Generally, the splitting of the second RDF peak during quenching confirmed the formation of Al-MG. The results of the application of a uniaxial tensile stress on the Al-MG samples and the NCs at 300 K with a strain rate of the order of <span><math><mrow><mn>5</mn><mo>.</mo><mrow><mspace></mspace></mrow><mn>10</mn><msup><mrow><mrow><mspace></mspace></mrow></mrow><mn>8</mn></msup><mrow><mspace></mspace></mrow><msup><mrow><mi>s</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></math></span> showed that the mechanical properties (Young's modulus, ultimate tensile strength, elastic limit, etc.) are improved by the reinforcement of the Al-MG matrix with fibers (cylinder) of crystalline nickel compared to that of -monatomic Al-MG. In general, it is observed that the ultimate tensile strength and Young's modulus increase with the increase in the diameter of the reinforcing fibers. This is explained by the presence of the heterogeneous interface, which acts as a barrier to the propagation of shear bands and the atomic adjustment between Al and Ni stops the sliding and dislocations of the crystal planes.</p></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"646 ","pages":"Article 123211"},"PeriodicalIF":3.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142230029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of energy distribution, melting temperature, kinetics and space geometry on glass melting efficiency","authors":"Marcela Jebavá ,&nbsp;Petra Cincibusová ,&nbsp;Vladislava Tonarová ,&nbsp;Lubomír Němec","doi":"10.1016/j.jnoncrysol.2024.123227","DOIUrl":"10.1016/j.jnoncrysol.2024.123227","url":null,"abstract":"<div><p>The role of melting phenomena such as batch conversion, sand dissolution, bubble removal, and character of melt flow in glass melting process was investigated by using mathematical modeling. The objective of simulations was to achieve highest melting performance of a model “T-space”. Depending on the energetic factors, which express the longitudinal energy distribution and the proportion between Joule and combustion energy, uniform or spiral flow in the melting space were adjusted, characterized by high melting performance and reduced specific energy consumption. The effects of other factors, such as temperature, bubble growth rate, thickness of batch layer, and space geometry were investigated and their complex role in melting process discussed. Semiempirical formula expressing the relation between melting phenomena was derived. A schema illustrating the phenomena roles in melting process was designed.</p></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"646 ","pages":"Article 123227"},"PeriodicalIF":3.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142232837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dopant, coating, and grating effects in silica optical fibers under extreme neutron irradiation","authors":"Daniel C. Sweeney,&nbsp;Christian M. Petrie","doi":"10.1016/j.jnoncrysol.2024.123228","DOIUrl":"10.1016/j.jnoncrysol.2024.123228","url":null,"abstract":"<div><p>Radiation effects on fiber Bragg gratings (FBGs) have been studied but data gaps related to the effects of displacement damage resulting from high fast neutron fluence remain. In this work, Type-I and Type-II FBGs inscribed in optical fibers with various core dopants (Ge and F) and fiber coatings (acrylate, polyimide) were monitored in situ during 75 days of neutron irradiation to a peak fast (<span><math><mo>&gt;</mo></math></span>0.1 <span><math><mi>MeV</mi></math></span>) neutron fluence of <span><math><mrow><mn>3</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>21</mn></mrow></msup></mrow></math></span> n<span><math><msub><mrow></mrow><mrow><mtext>fast</mtext></mrow></msub></math></span>/cm<span><math><msup><mrow></mrow><mrow><mn>2</mn></mrow></msup></math></span>. The reflected intensity of the Type-I FBGs inscribed in a Ge-doped core fiber decreased by <span><math><mrow><mo>&gt;</mo><mn>30</mn></mrow></math></span> dB within 7 h of irradiation (<span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>19</mn></mrow></msup></mrow></math></span> n<span><math><msub><mrow></mrow><mrow><mtext>fast</mtext></mrow></msub></math></span>/cm<span><math><msup><mrow></mrow><mrow><mn>2</mn></mrow></msup></math></span>), whereas Type-II FBGs inscribed in a pure silica core fiber eventually approached <span><math><mo>&gt;</mo></math></span>40 dB attenuation after accumulating a fast neutron fluence on the order of <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>20</mn></mrow></msup></mrow></math></span> n<span><math><msub><mrow></mrow><mrow><mtext>fast</mtext></mrow></msub></math></span>/cm<span><math><msup><mrow></mrow><mrow><mn>2</mn></mrow></msup></math></span>. Type-II FBGs inscribed in F-doped core fiber improved stability: the attenuation approached an equilibrium value in the range of 10 to 20 dB.</p></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"646 ","pages":"Article 123228"},"PeriodicalIF":3.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142230028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Shear strength and optical bandgap in As2Se3 glasses permanently compacted under GPa pressures","authors":"Giuseppe Carini ,&nbsp;Giovanna D'Angelo ,&nbsp;Gaetano Di Marco ,&nbsp;Mauro Federico ,&nbsp;Steve W. Martin ,&nbsp;Inseok Seo ,&nbsp;Valentino Romano","doi":"10.1016/j.jnoncrysol.2024.123221","DOIUrl":"10.1016/j.jnoncrysol.2024.123221","url":null,"abstract":"<div><p>The application of GPa pressures on glassy As₂Se₃, at temperatures just below and above its glass transition, leads to permanently compacted glasses that exhibit increased densification. Also, melt-quenching of the same glass under a pressure of 7 GPa gives rise to the formation of its crystalline β-phase. The structure of these As₂Se₃ compacted solids have been explored by X-ray diffraction. Measurements of 10 MHz ultrasound velocities reveal that the density increase is associated with a substantial hardening of the elastic continuum as well as a growing shear strength of glassy solids: the shear modulus G increases by more than 35 % and the Poisson's ratio ν decreases by more than 13 %. The optical properties have been investigated by UV–VIS diffuse reflectance spectroscopy, which shows a well defined linear reduction of the optical bandgap <em>E_g</em> with increased density. All of these observations have been explained by considering a disordered layered structure of glassy As₂Se₃, where densification produced by compaction under GPa pressures gives rise to a progressive strengthening of the interlayer interactions.</p></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"646 ","pages":"Article 123221"},"PeriodicalIF":3.2,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142230026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Excellent magnetocaloric effect near the hydrogen liquefaction temperature of a binary Er67.5Co32.5 metallic glass","authors":"P.J. Wang,&nbsp;Q. Wang,&nbsp;J.M. Yuan,&nbsp;T.G. Zhai,&nbsp;Z.B. Li,&nbsp;D. Ding,&nbsp;L. Xia","doi":"10.1016/j.jnoncrysol.2024.123224","DOIUrl":"10.1016/j.jnoncrysol.2024.123224","url":null,"abstract":"<div><p>We reported the excellent magnetocaloric effect of a binary Er_67.5Co_32.5 metallic glass (MG) near the hydrogen liquefaction temperature. The binary MG ribbon was fabricated by a melt-spinning method. The Er_67.5Co_32.5 alloy exhibits a better glass formability than most of other rare earth (RE)-Co binary alloys. The maximum magnetic entropy change (<em>−</em>Δ<em>S_m^peak</em>) and refrigeration capacity (<em>RC</em>) of the Er_67.5Co_32.5 amorphous ribbon under 0–5 T reach to 17.47 J/(kg × <em>K</em>) near its Curie temperature (<em>T_c</em>, ∼ 11 K) and 472 J/kg, both of which are rather high among the RE-based MGs with a <em>T_c</em> around 10 K and imply the potential application perspective as magnetic refrigerants for hydrogen liquefaction. The magnetization as well as magnetocaloric behaviors of the binary MG were observed, and the mechanism involved was investigated.</p></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"646 ","pages":"Article 123224"},"PeriodicalIF":3.2,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142172307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing thermal shock stability of Yb3+-doped Zn(PO3)2-Ba(PO3)2-AlF3-KF fluorophosphate glass","authors":"Taiyu Duan ,&nbsp;Yao Ji ,&nbsp;Weichao Wang ,&nbsp;Qinyuan Zhang","doi":"10.1016/j.jnoncrysol.2024.123213","DOIUrl":"10.1016/j.jnoncrysol.2024.123213","url":null,"abstract":"<div><p>The 1.0 μm ultra-short pulse laser is distinguished by its high energy, short pulse width, and intense peak power density, serving various applications in materials processing and biomedicine. Yb ions play a crucial role in this wavelength range, yet achieving high doping levels in commercial Yb-doped silica fibers is challenging due to their dense network structure. Here, we present the design and fabrication of a fluorophosphate (FP) glass with high thermal shock stability (figure of merit is 0.95), achieved through thermodynamic prediction methods, ion field strength analysis, and glass structure theory. By modifying the composition of high-field-strength cations, we not only alter the fundamental properties of the glass but also enhance its thermomechanical performance. Specifically, Yb³⁺-doped Zn(PO₃)₂-Ba(PO₃)₂-AlF₃-KF FP glass (Yb₁₀-ZBAFP10) exhibits a high emission cross-section (0.74×10⁻²⁰ cm² at ∼1008 nm), a low level of minimum population inversion (<em>β</em>_min=0.09), and minimum pump intensity (<em>I</em>_min=1.75 kW/cm²). Furthermore, it demonstrates a stable fluorescence lifetime within the temperature range of 298 ∼ 473 K. These findings highlight the potential of Yb³⁺-doped FP glass for applications demanding high thermal shock stability, particularly in high repetition rate ultra-short pulse laser systems.</p></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"646 ","pages":"Article 123213"},"PeriodicalIF":3.2,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142164589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}