Journal of Non-crystalline Solids最新文献_第7页

Exploring in situ the thermal annealing of amorphous TiO2-GeO2 coatings 非晶TiO2-GeO2涂层原位热退火研究

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-11-27 DOI: 10.1016/j.jnoncrysol.2025.123866

Michele Magnozzi , Stefano Colace , Shima Samandari , Michael Caminale , Valentina Venturino , Riccardo Galafassi , Christophe Michel , Julien Teillon , Valérie Martinez , Marco Bazzan , Gianpietro Cagnoli , Gianluca Gemme , Francesco Bisio , Maurizio Canepa

Thermal annealing is often exploited to enhance the properties of optical coatings, such as those forming the dielectric mirrors in gravitational wave detectors (GWD). An amorphous mixture of TiO

_{2}

and GeO

_{2}

has recently been proposed as a key element for the next-generation GWD mirrors, however the effects of thermal annealing on this mixture are poorly understood and hardly predictable because GeO

_{2}

– unlike TiO

_{2}

and many other transition metal oxides commonly used in optical coatings – is a strong glass former. In this work, we track by means of in situ spectroscopic ellipsometry the evolution of thickness and refractive index of amorphous TiO

_{2}

-GeO

_{2}

coatings during several annealing cycles with different heating rates, maximum temperatures and time durations. We find that the thickness of TiO

_{2}

-GeO

_{2}

coatings increases during the heating ramp but rapidly decreases when 600 °C are reached. Because of this remarkable trend, and unlike all the other oxide coatings considered so far for the GWD mirrors, the thickness of the TiO

_{2}

-GeO

_{2}

coatings after the end of the annealing at 600 °C is almost the same as measured in the initial state. Physicochemical mechanisms that might explain the variations observed in the TiO

_{2}

-GeO

_{2}

properties during the annealing, including the remarkable thickness reduction at 600 °C, are discussed.

热退火通常用于提高光学涂层的性能，例如在引力波探测器（GWD）中形成介电镜的涂层。二氧化钛和GeO2的无定形混合物最近被提出作为下一代GWD反射镜的关键元素，然而，热退火对这种混合物的影响知之甚少，而且很难预测，因为与二氧化钛和许多其他通常用于光学涂层的过渡金属氧化物不同，GeO2是一种强玻璃前体。在这项工作中，我们用原位椭偏光谱仪跟踪了在不同加热速率、最高温度和持续时间的退火循环中，非晶TiO2-GeO2涂层的厚度和折射率的演变。我们发现TiO2-GeO2涂层的厚度在升温过程中增加，但当温度达到600℃时，涂层厚度迅速下降。由于这种显著的趋势，与迄今为止考虑的用于GWD反射镜的所有其他氧化物涂层不同，在600°C退火结束后，TiO2-GeO2涂层的厚度几乎与初始状态下测量的厚度相同。讨论了可能解释在退火过程中观察到的TiO2-GeO2性能变化的物理化学机制，包括在600°C时显著的厚度减小。

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引用次数: 0

A deep recurrent learning framework for predicting saturation magnetic flux density in Fe-based metallic glasses 铁基金属玻璃饱和磁通密度预测的深度循环学习框架

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-11-27 DOI: 10.1016/j.jnoncrysol.2025.123891

Yi-Cheng Wu , Lei Yan , Chen-Bo Ma , Peng-Shuai Gao , Dong-Peng Wang

Fe-based metallic glasses (MGs) possess excellent soft magnetic properties, yet identifying compositions with high saturation magnetic flux density (

B_{s}

) remains a significant challenge due to the vast compositional design space and the inefficiency of conventional experimental approaches. Conventional machine learning (ML) models have been applied to accelerate this process, but their reliance on manually engineered descriptors limits generalizability across diverse alloy systems. In this study, we developed an end-to-end deep recurrent learning framework, comprising the vanilla recurrent neural network (RNN), long short-term memory (LSTM), and gated recurrent unit (GRU) architectures, to predict

B_{s}

directly from elemental composition data. The models automatically extracted feature representations from raw atomic percentage vectors, eliminating the need for manual feature construction. Using a curated dataset of experimentally reported Fe-based MGs, the LSTM and GRU models achieved test set

R ²

up to 0.95, outperforming representative conventional ML algorithms. Furthermore, SHapley Additive exPlanations (SHAP) were employed to enhance interpretability, which quantitatively revealed the relative importance of alloying elements in governing

B_{s}

. These findings provide mechanistic insights into compositional effects and demonstrate the potential of interpretable deep recurrent learning models as effective tools for the data-driven discovery and optimization of Fe-based MGs with enhanced magnetic performance.

铁基金属玻璃（mg）具有优异的软磁性能，但由于巨大的成分设计空间和传统实验方法的低效率，确定具有高饱和磁通密度（Bs）的成分仍然是一个重大挑战。传统的机器学习（ML）模型已被应用于加速这一过程，但它们对人工设计的描述符的依赖限制了在不同合金系统中的通用性。在这项研究中，我们开发了一个端到端的深度循环学习框架，包括vanilla递归神经网络（RNN）、长短期记忆（LSTM）和门通循环单元（GRU）架构，直接从元素组成数据中预测b。该模型自动从原始原子百分比向量中提取特征表示，消除了手动特征构建的需要。LSTM和GRU模型使用一个精心设计的实验报告的基于fe的mg数据集，实现了测试集R²高达0.95，优于代表性的传统ML算法。此外，采用SHapley加性解释（SHAP）来提高可解释性，定量揭示了合金元素在控制Bs中的相对重要性。这些发现提供了对成分效应的机理见解，并证明了可解释的深度循环学习模型作为数据驱动发现和优化具有增强磁性能的铁基mg的有效工具的潜力。

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引用次数: 0

Optimized reddish-orange emission in Pr3+ions doped Pb3O4–ZrO2–B2O3–SiO2 glasses for advanced photonic applications 在Pr3+离子掺杂的Pb3O4-ZrO2-B2O3-SiO2玻璃中优化红橙发射，用于先进光子应用

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-11-24 DOI: 10.1016/j.jnoncrysol.2025.123878

Valluri Ravi Kumar , K.Kiran Kumar , L. Vijayalakshmi , Jiseok Lim , V. Ravi Kumar , N. Veeraiah

This study explores the structural and optical properties of Pb₃O₄-ZrO₂-B₂O₃-SiO₂ glasses mixed with different contents of praseodymium oxide (Pr₂O₃), synthesized via the melt-quenching technique. The unique combination of high-density Pb₃O₄, network forming B₂O₃–SiO₂, and thermally stabilizing ZrO₂ yields an amorphous and chemically durable glass matrix with tunable local field environments. The prepared glass samples were characterized using thermal and structural techniques (viz., XRD, SEM, EDS, FT-IR) and spectroscopic analyses including UV–Vis–NIR absorption, photoluminescence (PL), lifetime measurements and Judd–Ofelt analysis. X-ray diffraction (XRD) and scanning electron microscopy (SEM) confirmed the amorphous and homogeneous nature of the prepared glasses, while differential scanning calorimetry (DSC) revealed a high glass transition temperature (400–450 °C) and excellent thermal stability. FT-IR spectra verified the presence of interconnected B–O–Si and Zr–O structural units, indicating a well-stabilized borosilicate network that enhances rigidity and chemical durability. Under 447 nm excitation (³H₄→³P₂) the emission spectra exhibited multiple bands in the visible and NIR regions. Among various transitions, the ³P₀→³F₂ transition at 646 nm is found to be the most intense (reddish-orange) emission. Among all compositions, the glass with 0.5 mol% of Pr³⁺ ions displayed superior thermal, optical, and luminescent properties, exhibiting a high quantum efficiency (η =75.74%), broad emission band width (∼ 13 nm), large emission cross-section 88.08 × 10^–20 cm² and radiative life time of ∼ 1.183 μs for the ³P₀→³F₂ transition. These findings establish this composition as a promising candidate for solid-state laser and optical amplifier applications owing to its enhanced reddish-orange luminescence and optimized radiative properties.

研究了不同含量的氧化镨（Pr2O3）通过熔淬法制备Pb3O4-ZrO2-B2O3-SiO2玻璃的结构和光学性能。高密度的Pb3O4、形成网状的B2O3-SiO2和热稳定的ZrO2的独特组合产生了一种具有可调局部场环境的非晶和化学耐用的玻璃基体。利用XRD、SEM、EDS、FT-IR等热学和结构技术以及紫外-可见-近红外吸收、光致发光（PL）、寿命测量和Judd-Ofelt分析等光谱分析对制备的玻璃样品进行了表征。x射线衍射（XRD）和扫描电镜（SEM）证实了所制备玻璃的非晶态和均匀性，差示扫描量热法（DSC）显示了高的玻璃化转变温度（400-450℃）和优异的热稳定性。FT-IR光谱证实了互连的B-O-Si和Zr-O结构单元的存在，表明硼硅酸盐网络稳定良好，提高了刚性和化学耐久性。在447 nm激发下（3H4→3P2），发射光谱在可见光和近红外区呈现出多个波段。在各种跃迁中，646 nm处的3P0→3F2跃迁是最强烈的（红橙色）发射。其中，Pr3+离子含量为0.5 mol%的玻璃表现出优异的热学、光学和发光性能，量子效率高（η =75.74%），发射带宽（~ 13 nm），发射截面大（88.08 × 10-20 cm2）， 3P0→3F2跃迁的辐射寿命为~ 1.183 μs。这些发现表明，由于其增强的红橙色发光和优化的辐射特性，该组合物成为固态激光器和光放大器应用的有希望的候选者。

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引用次数: 0

Investigation of the impact of silver additions on the properties of bioactive glass: Modeling and Monte Carlo simulation for potential dental and bone applications 银添加物对生物活性玻璃性能影响的研究：牙科和骨骼潜在应用的建模和蒙特卡罗模拟

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-11-24 DOI: 10.1016/j.jnoncrysol.2025.123888

Fariba Azamian , Fariborz Sharifianjazi , Masoumeh Khamehchi , Ketevan Tavamaishvili , Ketevan Mikeladze , Nino Tebidze

This study presents three mathematical models developed to predict ion release concentrations (Ag, Ca, P, Si), pH evolution, and osteoblast proliferation in SiO₂–P₂O₅–CaO–Ag₂O bioactive glasses containing 2, 4, and 6 mol% Ag₂O. The models comprise: (1) a modified Higuchi model for predicting ion release over time; (2) a sigmoidal function–based model describing pH variation in simulated body fluid (SBF); and (3) a Gaussian dose–response model estimating osteoblast proliferation using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. These models quantify the effects of time and pH on ion release, the influence of time and Ag₂O content on pH evolution, and the combined impact of these parameters on osteoblast proliferation. The models’ accuracy and reliability were validated against experimental data, yielding coefficients of variation of 2.5 %, 0.7 %, and 4.6 % for ion release, pH, and osteoblast proliferation, respectively—confirming their high predictive performance. Monte Carlo simulations were employed to optimize model parameters and evaluate prediction robustness, enabling a probabilistic assessment of model performance. Overall, this modeling framework provides reliable quantitative predictions and supports the rational design of bioactive glasses for biomedical applications, including bone tissue engineering and dental regeneration.

本研究提出了三个数学模型，用于预测含有2,4和6mol % Ag2O的SiO2-P2O5-CaO-Ag2O生物活性玻璃中的离子释放浓度（Ag, Ca， P, Si）， pH演化和成骨细胞增殖。模型包括：(1)预测离子释放随时间变化的修正Higuchi模型；(2)基于s型函数的模拟体液pH值变化模型；(3)利用3-（4,5-二甲基噻唑-2-基）-2,5-二苯基溴化四唑（MTT）测定法建立高斯剂量反应模型，估计成骨细胞的增殖情况。这些模型量化了时间和pH对离子释放的影响，时间和Ag2O含量对pH演变的影响，以及这些参数对成骨细胞增殖的综合影响。通过实验数据验证了模型的准确性和可靠性，离子释放、pH和成骨细胞增殖的变异系数分别为2.5%、0.7%和4.6%，证实了模型的高预测性能。采用蒙特卡罗模拟优化模型参数，评估预测稳健性，实现对模型性能的概率评估。总体而言，该模型框架提供了可靠的定量预测，并支持生物医学应用生物活性眼镜的合理设计，包括骨组织工程和牙齿再生。

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引用次数: 0

Assessing the reliability of chemically strengthened borosilicate glass vials under simulated scratching conditions 在模拟刮擦条件下评估化学强化硼硅酸盐玻璃小瓶的可靠性

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-11-24 DOI: 10.1016/j.jnoncrysol.2025.123871

Jihun Jung , Sung Hyun Woo , Sehyun Oh , Jung Heon Lee , Hyeong-Jun Kim

In this study, the mechanical degradation behavior of chemically strengthened borosilicate glass vials (BSGVs) was examined using a line simulator, which is a physical damage testing device designed to replicate real-world handling conditions. The simulator generates scratch damage through vial-to-vial impacts, enabling cumulative vial displacements of up to approximately 40 km. The compressive fracture load (CFL) was evaluated as a function of the rotation count (i.e., the total travel distance). For the non-strengthened BSGVs, a notable decrease in the CFL was observed beyond 20 km, driven by increased surface scratch density and the formation of subsurface cracks. In contrast, chemically strengthened BSGVs preserved their structural integrity owing to the presence of surface compressive stress and sufficient depth of layer, which enhanced the wear resistance and inhibited crack propagation. Whereas the non-strengthened BSGVs exhibited a practical durability limit at approximately 10.38 km, the chemically strengthened vials maintained stable performance up to 42.72 km. These findings demonstrate that chemical strengthening significantly improves the fracture resistance of BSGVs, thereby reducing the likelihood of breakage during both manufacturing processes and end-user handling.

在这项研究中，使用线性模拟器测试了化学强化硼硅玻璃小瓶（bsgv）的机械降解行为，这是一种旨在复制现实世界处理条件的物理损伤测试设备。模拟器通过瓶与瓶的碰撞产生划痕损伤，使瓶的累计位移达到约40公里。压缩断裂载荷（CFL）作为旋转次数（即总行程距离）的函数进行评估。对于未加固的bsgv，由于表面划伤密度增加和地下裂缝的形成，CFL在20 km以上显著降低。相比之下，化学强化后的bsgv由于表面压应力的存在和足够的层深，保持了其结构的完整性，从而提高了耐磨性，抑制了裂纹扩展。未强化的bsgv的实际耐久性极限约为10.38 km，而化学强化的小瓶在42.72 km的范围内保持稳定的性能。这些研究结果表明，化学强化显著提高了bsgv的抗断裂性，从而降低了制造过程和最终用户处理过程中断裂的可能性。

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引用次数: 0

Neutron-induced opalescence in silica glass 硅玻璃中的中子诱导乳光

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-11-24 DOI: 10.1016/j.jnoncrysol.2025.123889

S.A. Vasiliev, P.F. Kashaykin, A.L. Tomashuk

Distribution of light scattering intensity along the length of silica optical fibers irradiated in nuclear reactors was measured by optical time domain reflectometry (OTDR). Longitudinal variations of the OTDR signal (“OTDR traces”) were found to contain two components associated with radiation-induced attenuation of light (RIA), on the one hand, and with longitudinal variation of the Rayleigh scattering coefficient (RSC), on the other. Based on the shape of the OTDR traces and its variation during irradiation, we concluded that the RSC dependence on the fast-neutron fluence is strongly non-monotonic: it features a ∼10-time increase at a fast-neutron fluence of ∼10¹⁸–10¹⁹ n_f/cm² followed by a fall-off during subsequent irradiation. Such RSC variation with fluence was interpreted as being associated with the formation of thermal spikes – peculiar silica regions ∼10 nm in size. Thermal spikes arise as the result of fast-neutron bombardment of silica and possess a higher fictive temperature and, consequently, a higher density. In the first stage of fast-neutron irradiation (10¹⁷ – 10¹⁹ n_f/cm²), thermal spikes become a factor of silica inhomogeneity to increase RSC. However, as soon as most silica is occupied by thermal spikes, further irradiation, on the contrary, makes silica more homogeneous to reduce RSC. The RSC increase and subsequent fall-off are argued to be similar to the anomalous RSC behavior in solids and liquids in the vicinity of phase transition temperature. For this reason, the RSC behavior upon fast-neutron irradiation can be named neutron-induced opalescence (NIO).

用光学时域反射法（OTDR）测量了核反应堆中辐照二氧化硅光纤的光散射强度沿长度的分布。发现OTDR信号的纵向变化（“OTDR迹线”）包含两个分量，一方面与辐射引起的光衰减（RIA）有关，另一方面与瑞利散射系数（RSC）的纵向变化有关。根据OTDR迹线的形状及其在辐照期间的变化，我们得出结论，RSC对快中子通量的依赖是非单调的：在快中子通量为~ 1018-1019 nf/cm2时，RSC增加了~ 10倍，然后在随后的辐照期间下降。这种随通量的RSC变化被解释为与热峰值的形成有关-特殊的二氧化硅区域的大小约为10 nm。热尖峰是由于快中子轰击二氧化硅而产生的，具有更高的有效温度，因此具有更高的密度。在快中子辐照的第一阶段（1017 - 1019 nf/cm2），热峰值成为硅非均匀性增加RSC的一个因素。然而，一旦大部分二氧化硅被热峰值占据，进一步的辐照反而使二氧化硅更加均匀以降低RSC。RSC的增加和随后的下降与相变温度附近固体和液体中的异常RSC行为相似。因此，在快中子辐照下的RSC行为可命名为中子诱导乳光（NIO）。

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引用次数: 0

Structural characterization of ZrCu thin films by ePDF correlated with morphological and analytical data 用ePDF表征ZrCu薄膜的结构与形貌和分析数据相关

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-11-23 DOI: 10.1016/j.jnoncrysol.2025.123877

Heloisa H.P. Silva , Angelo L. Gobbi , Carlos A.R. Costa , Edson R. Leite , Jefferson Bettini

ZrCu thin films were grown by DC magnetron sputtering across the full composition range to investigate the amorphization degree by pair distribution function obtained by electron diffraction. The length of structural coherence analysis, obtained from the electron pair distribution function and normalized by bond distances, proved to be a reliable parameter for quantifying amorphization. These analyses showed that alloys containing 20–50 at.% Zr exhibited the highest range of amorphization degree, with Zr38.2 presenting the strongest amorphous character. Morphological analysis using high-resolution transmission electron microscopy images and atomic force microscopy images reveals phase segregation in Zr22.1 and Zr79.5. Oxidation analyses conducted by electron energy loss spectroscopy and X-ray photon spectroscopy revealed that Zr-rich alloys experienced stronger oxidation, primarily due to the formation of a passivation layer rather than bulk incorporation. These findings provide a detailed correlation between structural and morphological features, validating theoretical predictions for the optimal amorphous range and contributing to the design of ZrCu-based metallic glasses.

采用直流磁控溅射法在全成分范围内生长ZrCu薄膜，利用电子衍射得到的对分布函数研究薄膜的非晶化程度。由电子对分布函数和键距归一化得到的结构相干分析长度被证明是量化非晶化的可靠参数。这些分析表明，含20-50 at的合金。% Zr的非晶化程度最大，其中Zr38.2的非晶化程度最强。利用高分辨率透射电子显微镜图像和原子力显微镜图像对Zr22.1和Zr79.5进行形态分析，发现了相偏析。通过电子能量损失光谱和x射线光子光谱进行的氧化分析表明，富zr合金经历了更强的氧化，主要是由于钝化层的形成而不是大块的结合。这些发现提供了结构和形态特征之间的详细相关性，验证了最佳非晶范围的理论预测，并有助于zrcu基金属玻璃的设计。

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引用次数: 0

Preparation and characterization of Ti-Mn-Cu/TiC amorphous alloy composite powders via mechanical alloying 机械合金化制备Ti-Mn-Cu/TiC非晶合金复合粉末及表征

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-11-23 DOI: 10.1016/j.jnoncrysol.2025.123869

Zhihui Chen, Jilong Nie, Xin Chen, Haibo Li, Xueyong Chen, Cuiyong Tang

The Ti-based amorphous alloy system was designed based on the principles of “near mixing enthalpy” and “effective atomic size difference,” leading to a series of compositions formulated as Ti_(76–2x)Mn₍₇ ₊ _x₎Cu₍₁₇₊_x₎ (x = 0, 5, 10, 15). Among these, the Ti₅₆Mn₁₇Cu₂₇ composition exhibited the highest degree of amorphization after 60 h of mechanical alloying. Accordingly, this study systematically investigated the influence of TiC powder addition on the glass-forming ability, microstructure, and thermal stability of Ti₅₆Mn₁₇Cu₂₇ alloy powders. The results revealed that in the absence of TiC, residual crystalline phases, mainly Mn solid solution, remained throughout the mechanical alloying process. In contrast, the addition of TiC significantly accelerated the disappearance of residual Mn diffraction peaks, facilitating the formation of Ti-Mn-Cu/TiC amorphous composite powders after 60 h of milling. The incorporation of TiC promoted dislocation multiplication within and around the residual crystalline regions, disrupted local lattice ordering, and enhanced non-equilibrium atomic diffusion, collectively promoting the amorphization process. Furthermore, TiC addition contributed to particle size refinement and improved uniformity in size distribution. Among all studied compositions, the Ti₅₆Mn₁₇Cu₂₇ + 10 wt.% TiC powder demonstrated the highest amorphous phase fraction, the broadest supercooled liquid region (ΔT_x = 27.09 °C), and a relatively low crystallization enthalpy, indicating that the optimal TiC content effectively enhances both amorphous phase formation and thermal stability.

基于“近混合焓”和“有效原子尺寸差”的原则，设计了Ti基非晶合金体系，得到了一系列组成为Ti(76-2x)Mn(7 +x) Cu(17+x) （x = 0,5,10,15）。其中Ti56Mn17Cu27在机械合金化60 h后非晶化程度最高。因此，本研究系统地研究了TiC粉末添加对Ti56Mn17Cu27合金粉末的非晶形成能力、显微组织和热稳定性的影响。结果表明，在不添加TiC的情况下，机械合金化过程中存在以Mn固溶体为主的残余晶相。相比之下，TiC的加入显著加速了残余Mn衍射峰的消失，有利于磨矿60 h后Ti-Mn-Cu/TiC非晶复合粉末的形成。TiC的掺入促进了残晶区域内部和周围的位错增殖，破坏了局部晶格有序，增强了非平衡原子扩散，共同促进了非晶化过程。此外，TiC的加入有助于细化粒度，提高粒度分布的均匀性。在所有研究成分中，Ti56Mn17Cu27 + 10 wt.% TiC粉末的非晶相分数最高，过冷液区最宽（ΔTx = 27.09℃），晶化焓相对较低，表明最佳TiC含量有效地促进了非晶相的形成和热稳定性。

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引用次数: 0

Simple synthesis of low-cost CaO-SiO2 aerogels: improved energy efficiency of oil steam pipelines through excellent thermal insulation and temperature resistance 低成本CaO-SiO2气凝胶的简单合成：通过优异的保温性和耐温性，提高油汽管道的能效

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-11-21 DOI: 10.1016/j.jnoncrysol.2025.123873

Qiang Zheng , Lei Su , Zhun Fan , Chao Xu , Qinxin Wang , Wenjun Li , Sheng Cui

Petroleum steam pipeline insulation plays a crucial role in enhancing the efficiency of heavy crude oil extraction, but traditional insulation materials are prone to failure in high-temperature environments, affecting both efficiency and economics. Although pure silica aerogel exhibits excellent thermal insulation, its high cost limits large-scale applications. In this study, a novel glass fiber reinforced CaO-SiO₂ composite aerogel (G-CSA) synthesized by an in situ sol-gel method, was developed as a cost-effective alternative to pure silica aerogels through the incorporation of low-cost CaO.

G-CSA (Ca/Si = 1:1) exhibited a thermal conductivity of 0.02785 W/(m·K) at room temperature, which was 27.70 % lower than that of glass fiber mats. Its thermal conductivity at elevated temperatures is significantly lower than that of traditional thermal insulation materials, and it is comparable to pure silica aerogel. Under a 400 °C heat source, the cold surface temperature was 103.5 °C and the ΔT was 296.5 °C, yielding a thermal insulation performance of 74.13 % for G-CSA. The cost of CaO-SiO₂ composite aerogel is reduced by 35.67 % compared to the SiO₂ aerogel that is commercially available today. Through energy-saving simulation calculations, comparing G-CSA with rock wool and composite silicate, the fuel-saving rate is 39.92 % and 48.12 %, respectively, and a single steam pipe can save 1391.55 tonnes/year and 1929.25 tonnes/year of oil used for steam per year. Combined with its excellent temperature resistance thermal insulation properties and economy, CaO-SiO₂ composite aerogel shows great potential for industrial energy-saving applications.

石油蒸汽管道保温对提高稠油开采效率起着至关重要的作用，但传统的保温材料在高温环境下容易失效，影响效率和经济性。虽然纯硅气凝胶具有优异的隔热性能，但其高昂的成本限制了其大规模应用。在本研究中，通过原位溶胶-凝胶法合成了一种新型的玻璃纤维增强CaO- sio2复合气凝胶（G-CSA），通过加入低成本的CaO，开发了一种具有成本效益的纯二氧化硅气凝胶替代品。G-CSA （Ca/Si = 1:1）的室温导热系数为0.02785 W/(m·K)，比玻璃纤维毡低27.70%。其在高温下的导热系数明显低于传统保温材料，与纯硅气凝胶相当。在400℃热源下，G-CSA的冷表面温度为103.5℃，ΔT温度为296.5℃，保温性能为74.13%。与目前市售的二氧化硅气凝胶相比，cao - sio2复合气凝胶的成本降低了35.67%。通过节能模拟计算，将G-CSA与岩棉和复合硅酸盐进行对比，节油率分别为39.92%和48.12%，单根蒸汽管每年可节约1391.55吨/年和1929.25吨/年的蒸汽用油。结合其优异的耐温保温性能和经济性，cao - sio2复合气凝胶在工业节能应用中显示出巨大的潜力。

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引用次数: 0

Dispersion feature of third-order optical nonlinearity of Ge-Ga-S chalcogenide glasses and their superior optical limiting performance Ge-Ga-S硫系玻璃三阶光学非线性色散特性及其优越的光学限制性能

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids

Pub Date : 2025-11-21 DOI: 10.1016/j.jnoncrysol.2025.123886

Tianji Fang , Guangrui Mao , Shixun Dai , Changgui Lin , Tiefeng Xu , Feifei Chen

In this paper, we acquired the dispersion feature of third-order optical nonlinearity of Ge-Ga-S chalcogenide glasses with wavelength interval of 0.02 μm. With such a high wavelength resolution, we observed subtle differences between the dispersion behavior of nonlinear absorption (β) and nonlinear refraction (n₂). On the other hand, we also discovered the exceptional optical limiting performance of chalcogenide glasses. The experimental optical limiting thresholds (OLT) show a positive dependency on wavelength and have a magnitude in order of μJ/cm². Such ultra-low OLT renders chalcogenide glasses highly promising as a protective medium for human eyes or precision optical devices against high power laser induced damage.

本文获得了波长间隔为0.02 μm的Ge-Ga-S硫系玻璃的三阶光学非线性色散特征。在如此高的波长分辨率下，我们观察到非线性吸收（β）和非线性折射（n2）的色散行为之间存在细微差异。另一方面，我们也发现了硫系玻璃优异的光学限制性能。实验光极限阈值（OLT）与波长呈正相关，其大小约为μJ/cm2。这种超低OLT使得硫系玻璃作为人眼或精密光学器件免受高功率激光损伤的保护介质具有很大的前景。

引用次数: 0