Journal of Non-crystalline Solids最新文献

英文中文

Thermophysical properties of Zr65Cu17.5Ni10Al7.5 bulk metallic glass

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-01-16 DOI: 10.1016/j.jnoncrysol.2025.123400

Ruslan A. Sergiienko , Adit Sharma , Oleksandr A. Shcheretskyi , Vladislav Yu Zadorozhnyy , Volodymyr O. Shcheretskyi , Oleksandr M. Myslyvchenko , Anatolii M. Verkhovliuk , Andrey A. Stepashkin , J.C. Qiao

This study investigates the thermophysical properties of Zr₆₅Cu_17.5Ni₁₀Al_7.5 bulk metallic glass during its amorphous-to-crystalline transformation. Differential scanning calorimetry was used to examine the glass transition and crystallization temperatures, enthalpy of crystallization and activation energy. Dynamic mechanical analysis and laser flash analysis were used to determine the storage and loss moduli, thermal diffusivity and thermal conductivity, respectively. Heating-cooling cycles induced structural relaxation and irreversible changes in the amorphous material. Structural relaxation at increasing aging temperatures below glass transition temperature resulted in the increase in the storage modulus and higher loss factor in comparison with the as-cast state. Crystallization led to the formation of intermetallic phases and improved thermal conductivity. Overall, the fully crystalline material exhibited the highest thermal conductivity and diffusivity. Heat treatment at 390 °C for 20 min and at 400 °C for 5 min enhanced plasticity, attributed to shear bands, crystalline phases, and structural relaxation.

{"title":"Thermophysical properties of Zr65Cu17.5Ni10Al7.5 bulk metallic glass","authors":"Ruslan A. Sergiienko , Adit Sharma , Oleksandr A. Shcheretskyi , Vladislav Yu Zadorozhnyy , Volodymyr O. Shcheretskyi , Oleksandr M. Myslyvchenko , Anatolii M. Verkhovliuk , Andrey A. Stepashkin , J.C. Qiao","doi":"10.1016/j.jnoncrysol.2025.123400","DOIUrl":"10.1016/j.jnoncrysol.2025.123400","url":null,"abstract":"<div><div>This study investigates the thermophysical properties of Zr<sub>65</sub>Cu<sub>17.5</sub>Ni<sub>10</sub>Al<sub>7.5</sub> bulk metallic glass during its amorphous-to-crystalline transformation. Differential scanning calorimetry was used to examine the glass transition and crystallization temperatures, enthalpy of crystallization and activation energy. Dynamic mechanical analysis and laser flash analysis were used to determine the storage and loss moduli, thermal diffusivity and thermal conductivity, respectively. Heating-cooling cycles induced structural relaxation and irreversible changes in the amorphous material. Structural relaxation at increasing aging temperatures below glass transition temperature resulted in the increase in the storage modulus and higher loss factor in comparison with the as-cast state. Crystallization led to the formation of intermetallic phases and improved thermal conductivity. Overall, the fully crystalline material exhibited the highest thermal conductivity and diffusivity. Heat treatment at 390 °C for 20 min and at 400 °C for 5 min enhanced plasticity, attributed to shear bands, crystalline phases, and structural relaxation.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"652 ","pages":"Article 123400"},"PeriodicalIF":3.2,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143130847","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}

引用次数: 0

Properties of the interfacial transition and their impact on Cu80Ta20/Cu20Ta80 nano-multilayers by nanoimprinting

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-01-14 DOI: 10.1016/j.jnoncrysol.2025.123396

Kalis-Rubedo Thoriq , Tan-Tai Do , Te-Hua Fang

Molecular dynamics simulations were utilized to explore nanoimprinting techniques and assess the elastic recovery and mechanical properties of Cu₈₀Ta₂₀/Cu₂₀Ta₈₀. The impact of velocity, depth, and different layers of Amorphous/Amorphous Nanolaminates (AANLs) was thoroughly investigated. Altering the simulation conditions significantly influenced important mechanical aspects, such as shear strain, imprint forces, displacement vector, and elastic recovery ratio, which were extensively studied. The results indicated that as the number of layers in the substrate increases from 2 to 8, the imprinting force also rises. This indicates that a greater number of layers leads to a stronger resistance to deformation during the nanoimprinting process. The atomic distribution within the layers also plays a critical role, influencing the material's plastic deformation behavior and imprinting characteristics. Besides, the substrate with the smallest layer thickness (18.7 Å or 8 layers) demonstrated the highest elastic recovery ratio. Furthermore, the imprinting force exhibits an increase with rising loading velocity, with higher velocities resulting in greater forces compared to lower velocities. Faster velocities reduce elastic recovery and increase resistance to flow, while slower velocities allow for more plastic deformation and better imprinting fidelity. These insights will facilitate the development of amorphous materials that demonstrate both high strength and exceptional ductility.

{"title":"Properties of the interfacial transition and their impact on Cu80Ta20/Cu20Ta80 nano-multilayers by nanoimprinting","authors":"Kalis-Rubedo Thoriq , Tan-Tai Do , Te-Hua Fang","doi":"10.1016/j.jnoncrysol.2025.123396","DOIUrl":"10.1016/j.jnoncrysol.2025.123396","url":null,"abstract":"<div><div>Molecular dynamics simulations were utilized to explore nanoimprinting techniques and assess the elastic recovery and mechanical properties of Cu<sub>80</sub>Ta<sub>20</sub>/Cu<sub>20</sub>Ta<sub>80</sub>. The impact of velocity, depth, and different layers of Amorphous/Amorphous Nanolaminates (AANLs) was thoroughly investigated. Altering the simulation conditions significantly influenced important mechanical aspects, such as shear strain, imprint forces, displacement vector, and elastic recovery ratio, which were extensively studied. The results indicated that as the number of layers in the substrate increases from 2 to 8, the imprinting force also rises. This indicates that a greater number of layers leads to a stronger resistance to deformation during the nanoimprinting process. The atomic distribution within the layers also plays a critical role, influencing the material's plastic deformation behavior and imprinting characteristics. Besides, the substrate with the smallest layer thickness (18.7 Å or 8 layers) demonstrated the highest elastic recovery ratio. Furthermore, the imprinting force exhibits an increase with rising loading velocity, with higher velocities resulting in greater forces compared to lower velocities. Faster velocities reduce elastic recovery and increase resistance to flow, while slower velocities allow for more plastic deformation and better imprinting fidelity. These insights will facilitate the development of amorphous materials that demonstrate both high strength and exceptional ductility.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"651 ","pages":"Article 123396"},"PeriodicalIF":3.2,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139386","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}

引用次数: 0

Structural investigation of alkali aluminoborosilicate glass containing MoO3 for vitrification of nuclear waste

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-01-14 DOI: 10.1016/j.jnoncrysol.2025.123387

Seon-jin Kim , Tae-min Yeo , Sung-hee Hyun , Jisun Lee , Jung-wook Cho

Molybdenum poses challenges due to its low solubility and propensity for undesirable crystallization in nuclear waste glasses. An increased concentration of MoO₃ promotes the formation of crystalline phases within the glass matrix, potentially compromising the long-term stability of nuclear waste glasses. This study explored the impact of incorporating various alkali cations into Mo-containing aluminoborosilicate glasses, employing various spectroscopies. We found that incorporating larger alkali cations promotes a more polymerized silicate network, consequently reducing the crystallization tendency. Spectroscopic analysis suggests the structural modification of Mo units with the incorporation of larger alkali cations, presenting two potential structural adjustments. Both scenarios facilitate the direct linkage of Mo units to the silicate network (Mo–O–Si), in alignment with Pauling's stability rule. The formation of Mo–O–Si bonds not only improves the solubility of Mo in glass but also prevents the crystallization of Mo-containing phases by inhibiting the formation of nucleation seeds, MoO₄²⁻ entities.

{"title":"Structural investigation of alkali aluminoborosilicate glass containing MoO3 for vitrification of nuclear waste","authors":"Seon-jin Kim , Tae-min Yeo , Sung-hee Hyun , Jisun Lee , Jung-wook Cho","doi":"10.1016/j.jnoncrysol.2025.123387","DOIUrl":"10.1016/j.jnoncrysol.2025.123387","url":null,"abstract":"<div><div>Molybdenum poses challenges due to its low solubility and propensity for undesirable crystallization in nuclear waste glasses. An increased concentration of MoO<sub>3</sub> promotes the formation of crystalline phases within the glass matrix, potentially compromising the long-term stability of nuclear waste glasses. This study explored the impact of incorporating various alkali cations into Mo-containing aluminoborosilicate glasses, employing various spectroscopies. We found that incorporating larger alkali cations promotes a more polymerized silicate network, consequently reducing the crystallization tendency. Spectroscopic analysis suggests the structural modification of Mo units with the incorporation of larger alkali cations, presenting two potential structural adjustments. Both scenarios facilitate the direct linkage of Mo units to the silicate network (Mo–O–Si), in alignment with Pauling's stability rule. The formation of Mo–O–Si bonds not only improves the solubility of Mo in glass but also prevents the crystallization of Mo-containing phases by inhibiting the formation of nucleation seeds, MoO<sub>4</sub><sup>2−</sup> entities.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"651 ","pages":"Article 123387"},"PeriodicalIF":3.2,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139384","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}

引用次数: 0

Creep behavior of SiO2 films treated at elevated temperatures for SiC capacitive pressure sensors using nanoindentation technique and FE analysis

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-01-10 DOI: 10.1016/j.jnoncrysol.2025.123385

Chengyi Liu , Jiangfeng Du , Qi Yu

As both the operating temperature and duration of SiC capacitive pressure sensors escalate, the creep characteristics of the SiO₂ thin film structure significantly impact the sensor's performance and reliability. This study aims to evaluate the creep characteristics of 2.2 μm-thick SiO₂ thin films subjected to different conditions. Firstly, we utilized nanoindentation technique and microscopic methods to perform creep analysis on SiO₂/SiC samples. Then, through curve fitting and numerical calculations, we determined the stress exponent of SiO₂ to range from 2.73 to 12.47 after high-temperature treatments, and derived the creep power-law model for the steady state. Finally, we imported the material parameters from tests and calculations into finite element (FE) analysis software to establish a nanoindentation creep model and simulate the testing process. The maximum relative error between the simulation and the experiment was 5.52%, validating the accuracy of the proposed model and the creep parameters obtained from the nanoindentation technique.

{"title":"Creep behavior of SiO2 films treated at elevated temperatures for SiC capacitive pressure sensors using nanoindentation technique and FE analysis","authors":"Chengyi Liu , Jiangfeng Du , Qi Yu","doi":"10.1016/j.jnoncrysol.2025.123385","DOIUrl":"10.1016/j.jnoncrysol.2025.123385","url":null,"abstract":"<div><div>As both the operating temperature and duration of SiC capacitive pressure sensors escalate, the creep characteristics of the SiO<sub>2</sub> thin film structure significantly impact the sensor's performance and reliability. This study aims to evaluate the creep characteristics of 2.2 μm-thick SiO<sub>2</sub> thin films subjected to different conditions. Firstly, we utilized nanoindentation technique and microscopic methods to perform creep analysis on SiO<sub>2</sub>/SiC samples. Then, through curve fitting and numerical calculations, we determined the stress exponent of SiO<sub>2</sub> to range from 2.73 to 12.47 after high-temperature treatments, and derived the creep power-law model for the steady state. Finally, we imported the material parameters from tests and calculations into finite element (FE) analysis software to establish a nanoindentation creep model and simulate the testing process. The maximum relative error between the simulation and the experiment was 5.52%, validating the accuracy of the proposed model and the creep parameters obtained from the nanoindentation technique.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"651 ","pages":"Article 123385"},"PeriodicalIF":3.2,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139383","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}

引用次数: 0

Innovative approach to the catalytic effects of oxide glasses and glass-ceramics on the thermal decomposition of fatty acids

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-01-10 DOI: 10.1016/j.jnoncrysol.2025.123386

Sara Marijan , Petr Mošner , Ladislav Koudelka , Željko Skoko , Luka Pavić , Jana Pisk

In the quest to mitigate greenhouse gas emissions, biofuels, particularly biodiesel and new generation renewable diesel, are compelling alternatives to fossil fuels due to their lower toxicity, renewability, biodegradability, lubricity, and cleaner combustion. This study explores cost-effective, innovative catalysts: glasses-(ceramics) derived from the Na₂O-V₂O₅-(Al₂O₃)-P₂O₅-Nb₂O₅ system, for the pyrolytic deoxygenation of long-chain fatty acids into alkanes. Thermogravimetric analysis/differential scanning calorimetry (TG/DSC) assessed catalytic activity, while TG-IR and STA-QMS provided insights into the catalytic mechanisms. Dielectric properties examined through solid-state impedance spectroscopy (SS-IS) revealed that increased V₂O₅ content enhances dielectric permittivity, dielectric strength, and dielectric loss, correlating with improved catalytic activity. Optimal properties were achieved with the highest V₂O₅ content, indicating potential applications in memory and switching devices and battery technology. This study highlights the versatility and multifunctionality of oxide glasses-(ceramics), enhanced through simple compositional adjustments.

{"title":"Innovative approach to the catalytic effects of oxide glasses and glass-ceramics on the thermal decomposition of fatty acids","authors":"Sara Marijan , Petr Mošner , Ladislav Koudelka , Željko Skoko , Luka Pavić , Jana Pisk","doi":"10.1016/j.jnoncrysol.2025.123386","DOIUrl":"10.1016/j.jnoncrysol.2025.123386","url":null,"abstract":"<div><div>In the quest to mitigate greenhouse gas emissions, biofuels, particularly biodiesel and new generation renewable diesel, are compelling alternatives to fossil fuels due to their lower toxicity, renewability, biodegradability, lubricity, and cleaner combustion. This study explores cost-effective, innovative catalysts: glasses-(ceramics) derived from the Na<sub>2</sub>O-V<sub>2</sub>O<sub>5</sub>-(Al<sub>2</sub>O<sub>3</sub>)-P<sub>2</sub>O<sub>5</sub>-Nb<sub>2</sub>O<sub>5</sub> system, for the pyrolytic deoxygenation of long-chain fatty acids into alkanes. Thermogravimetric analysis/differential scanning calorimetry (TG/DSC) assessed catalytic activity, while TG-IR and STA-QMS provided insights into the catalytic mechanisms. Dielectric properties examined through solid-state impedance spectroscopy (SS-IS) revealed that increased V<sub>2</sub>O<sub>5</sub> content enhances dielectric permittivity, dielectric strength, and dielectric loss, correlating with improved catalytic activity. Optimal properties were achieved with the highest V<sub>2</sub>O<sub>5</sub> content, indicating potential applications in memory and switching devices and battery technology. This study highlights the versatility and multifunctionality of oxide glasses-(ceramics), enhanced through simple compositional adjustments.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"651 ","pages":"Article 123386"},"PeriodicalIF":3.2,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139385","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}

引用次数: 0

Tuning macroporous structure and thermal properties of polymethylsilsesquioxane aerogels via tailored heat treatment

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-01-09 DOI: 10.1016/j.jnoncrysol.2025.123388

Zhi Li , Fang Zhou , Kai Shen , Min Hu , Miao Liu , Shengjie Yao , Zikang Chen , Qiong Liu , Chuangang Fan , Xiaoxu Wu

The rapid preparation of polymethylsilsesquioxane (PMSQ) aerogels via ambient pressure drying resolves the issues of organic solvent overconsumption and lengthy processing commonly encountered in the production of hydrophobic SiO₂ aerogels. However, macropore structures in MSQ aerogels diminish thermal insulation properties, limiting their broader application. This study employed a simple, clean, and controllable heat treatment technique to tailor the microstructure and surface chemical of MSQ aerogels, yielding SiO₂ aerogels with superior hydrophobicity, outstanding thermal insulation performance, and enhanced thermal stability. Specifically, through heat treatment at 600 °C in an argon atmosphere, MSQ aerogels demonstrate minimal morphological changes (2.5 % volume shrinkage), maintaining low density (0.066 g/cm³), high porosity, and excellent hydrophobicity. Notably, Reduced macropores optimize thermal conductivity (27.3 mW/m/K), while the partial decomposition of organic groups enhances thermal stability and lowers gross calorific value. This study offers a promising strategy for improving the thermal properties of MSQ aerogels and broadening their applications.

{"title":"Tuning macroporous structure and thermal properties of polymethylsilsesquioxane aerogels via tailored heat treatment","authors":"Zhi Li , Fang Zhou , Kai Shen , Min Hu , Miao Liu , Shengjie Yao , Zikang Chen , Qiong Liu , Chuangang Fan , Xiaoxu Wu","doi":"10.1016/j.jnoncrysol.2025.123388","DOIUrl":"10.1016/j.jnoncrysol.2025.123388","url":null,"abstract":"<div><div>The rapid preparation of polymethylsilsesquioxane (PMSQ) aerogels via ambient pressure drying resolves the issues of organic solvent overconsumption and lengthy processing commonly encountered in the production of hydrophobic SiO<sub>2</sub> aerogels. However, macropore structures in MSQ aerogels diminish thermal insulation properties, limiting their broader application. This study employed a simple, clean, and controllable heat treatment technique to tailor the microstructure and surface chemical of MSQ aerogels, yielding SiO<sub>2</sub> aerogels with superior hydrophobicity, outstanding thermal insulation performance, and enhanced thermal stability. Specifically, through heat treatment at 600 °C in an argon atmosphere, MSQ aerogels demonstrate minimal morphological changes (2.5 % volume shrinkage), maintaining low density (0.066 g/cm³), high porosity, and excellent hydrophobicity. Notably, Reduced macropores optimize thermal conductivity (27.3 mW/m/K), while the partial decomposition of organic groups enhances thermal stability and lowers gross calorific value. This study offers a promising strategy for improving the thermal properties of MSQ aerogels and broadening their applications.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"651 ","pages":"Article 123388"},"PeriodicalIF":3.2,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139380","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}

引用次数: 0

Design and optimization of a large mode field, low crosstalk homogeneous six-core photonic crystal fiber

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-01-08 DOI: 10.1016/j.jnoncrysol.2024.123383

Dexiao Chen , Fang Tan , Zhitao Zhang , Yanke Zhang , Songsong Ge , Xiang Zhang , Ping Huang , Shunfa Cui , Zhuang Leng

Multi-core fiber is one of the important application technologies for space division multiplexing. This paper proposes and designs a large mode field, low crosstalk homogeneous six-core photonic crystal fiber. The method of controlling a single variable is employed to ascertain the crosstalk of the fiber and the variation curve of the effective mode field area, while optimizing the parameters by varying the structural parameters using the full vector finite element method. The performance of the fiber with optimized parameters in terms of bending, dispersion, confinement loss, and electric field strength is calculated and analyzed. At a wavelength of 1550 nm, the crosstalk and effective mode field area following the optimization of structural parameters are -51.6 dB and 341 μm², respectively; The minimum level of crosstalk is -63.9 dB when the bending radius is 1.00 cm; The dispersion values are as low as -6062 ps/nm/km; The limiting loss is a maximum of 0.00532 dB/km; The electric field strength of each core in the radial and axial directions of the fiber is considerable and uniformly distributed. Compared with similar multi-core fibers, the large mode field, low-loss homogeneous six-core photonic crystal fiber designed in this paper has better performance in terms of bending, dispersion, limiting loss, and electric field strength. The design of this structure provides a useful reference scheme for optical communication networks as well as fiber optic device development.

{"title":"Design and optimization of a large mode field, low crosstalk homogeneous six-core photonic crystal fiber","authors":"Dexiao Chen , Fang Tan , Zhitao Zhang , Yanke Zhang , Songsong Ge , Xiang Zhang , Ping Huang , Shunfa Cui , Zhuang Leng","doi":"10.1016/j.jnoncrysol.2024.123383","DOIUrl":"10.1016/j.jnoncrysol.2024.123383","url":null,"abstract":"<div><div>Multi-core fiber is one of the important application technologies for space division multiplexing. This paper proposes and designs a large mode field, low crosstalk homogeneous six-core photonic crystal fiber. The method of controlling a single variable is employed to ascertain the crosstalk of the fiber and the variation curve of the effective mode field area, while optimizing the parameters by varying the structural parameters using the full vector finite element method. The performance of the fiber with optimized parameters in terms of bending, dispersion, confinement loss, and electric field strength is calculated and analyzed. At a wavelength of 1550 nm, the crosstalk and effective mode field area following the optimization of structural parameters are -51.6 dB and 341 μm², respectively; The minimum level of crosstalk is -63.9 dB when the bending radius is 1.00 cm; The dispersion values are as low as -6062 ps/nm/km; The limiting loss is a maximum of 0.00532 dB/km; The electric field strength of each core in the radial and axial directions of the fiber is considerable and uniformly distributed. Compared with similar multi-core fibers, the large mode field, low-loss homogeneous six-core photonic crystal fiber designed in this paper has better performance in terms of bending, dispersion, limiting loss, and electric field strength. The design of this structure provides a useful reference scheme for optical communication networks as well as fiber optic device development.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"651 ","pages":"Article 123383"},"PeriodicalIF":3.2,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139381","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}

引用次数: 0

Improvement of soft magnetic properties for Fe-based amorphous/nanocrystalline alloy by longitudinal magnetic field annealing

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-01-06 DOI: 10.1016/j.jnoncrysol.2024.123382

Mufeng Jiang , Jingjing Wang , Mingjuan Cai , Jun Li , Wanying Dong , Zhijun Guo , Baolong Shen

This study investigated the enhancement of soft magnetic properties in Fe_83.2-xCo_xSi_2.5B_9.5P₄Cu_0.8 (x = 0, 4, 8, 12 and 16 at %) amorphous/nanocrystalline alloys through longitudinal magnetic field annealing (FA). The FA-treated alloys demonstrate superior magnetic performance, achieving a superior saturation flux density (B_s) of 1.85 T, ultra-low coercivity (H_c) of 1.8 A/m, high effective permeability (μ_e) of 26,505 at 1 kHz, and low core loss (0.13 W/kg) at 1.0 T/50 Hz. Microstructural analysis reveals that the FA and Co substitution promotes nanocrystalline nucleation, forming high-density nanocrystals while suppressing grain growth through competitive dynamics and inhibiting element diffusion within the amorphous matrix. Domain observation further confirms that FA facilitates the transition from disordered, non-uniform magnetic to uniform, broad, plate-like domains. These findings elucidate the critical influence of longitudinal magnetic field annealing on microstructure evolution and magnetic domain alignment, which synergistically enhance soft magnetic properties.

{"title":"Improvement of soft magnetic properties for Fe-based amorphous/nanocrystalline alloy by longitudinal magnetic field annealing","authors":"Mufeng Jiang , Jingjing Wang , Mingjuan Cai , Jun Li , Wanying Dong , Zhijun Guo , Baolong Shen","doi":"10.1016/j.jnoncrysol.2024.123382","DOIUrl":"10.1016/j.jnoncrysol.2024.123382","url":null,"abstract":"<div><div>This study investigated the enhancement of soft magnetic properties in Fe<sub>83.2-x</sub>Co<sub>x</sub>Si<sub>2.5</sub>B<sub>9.5</sub>P<sub>4</sub>Cu<sub>0.8</sub> (<em>x</em> = 0, 4, 8, 12 and 16 at %) amorphous/nanocrystalline alloys through longitudinal magnetic field annealing (FA). The FA-treated alloys demonstrate superior magnetic performance, achieving a superior saturation flux density (<em>B</em><sub>s</sub>) of 1.85 T, ultra-low coercivity (<em>H</em><sub>c</sub>) of 1.8 A/m, high effective permeability (<em>μ</em><sub>e</sub>) of 26,505 at 1 kHz, and low core loss (0.13 W/kg) at 1.0 T/50 Hz. Microstructural analysis reveals that the FA and Co substitution promotes nanocrystalline nucleation, forming high-density nanocrystals while suppressing grain growth through competitive dynamics and inhibiting element diffusion within the amorphous matrix. Domain observation further confirms that FA facilitates the transition from disordered, non-uniform magnetic to uniform, broad, plate-like domains. These findings elucidate the critical influence of longitudinal magnetic field annealing on microstructure evolution and magnetic domain alignment, which synergistically enhance soft magnetic properties.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"650 ","pages":"Article 123382"},"PeriodicalIF":3.2,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138290","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}

引用次数: 0

Three-dimensional nanosheet glass with fluid-induced switchable haze obtained by hydrothermal method

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-01-03 DOI: 10.1016/j.jnoncrysol.2024.123384

Heng Zhu , Wenguang Tu , Xi Zhu , Yong Zhou , Zhigang Zou

Ultrahigh haze nanosheet glass with three-dimensional nanostructure was fabricated using a simple hydrothermal method in concentrated hydrochloric acid solution at elevated temperatures. After 2 hours of hydrothermal treatment, the total transmission of the nanosheet glass decreased to less than 35%, with a haze value exceeding 95%. When the sample was wetted with water, the total transmission increased to 85%, while the haze value decreased to 32%. A mechanism was proposed to explain the formation of the three-dimensional nanostructure. Furthermore, we demonstrated a switchable-haze smart window model based on the nanosheet glass. These findings suggest potential applications in underwater optics, such as underwater cameras and diving goggles.

引用次数: 0

Insight into efficient removal of tetracycline from water by Fe–Si–B amorphous alloys

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-01-02 DOI: 10.1016/j.jnoncrysol.2024.123377

Jing Wei , Zhigang Zheng , Zhaoguo Qiu , Dechang Zeng

The removal efficiency of tetracycline (TC) by Fe-based amorphous (Fe^am) alloy was investigated through batch experiments, examining the effects of TC concentration, initial pH, and environmental temperature on its removal performance. The experimental results indicate that Fe^am, owing to its amorphous structure and excellent catalytic properties, has a TC removal rate that is 2.75 times greater than that of zero-valent iron (ZVI) powder. Within the range of initial pH values from 4 to 7, the degradation efficiency for TC remains high, with nearly all removal rates reaching 99 % after 30 min of treatment. The results suggest that the removal process is primarily attributed to adsorption (by Fe⁰ and its corrosion products) and reduction. The pH significantly influences the formation of iron corrosion products and the variations in TC species. The reactive adsorbed Fe²⁺ plays a crucial role in the removal process. In addition to demonstrating effective removal capabilities for TC, Fe^am also exhibits excellent removal performance for oxytetracycline (OTC) hydrochloride and chlorotetracycline (CTC) hydrochloride, underscoring its broad applicability among tetracycline antibiotics. In summary, this study provides a novel approach for the removal of tetracycline antibiotics from water.

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