International Journal of Applied Glass Science最新文献_第5页

Effective thermal conductivity of fiberglass insulation 玻璃纤维隔热材料的有效导热率

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2023-12-28 DOI: 10.1111/ijag.16652

Manoj K. Choudhary, Walter Eastes

{"title":"Effective thermal conductivity of fiberglass insulation","authors":"Manoj K. Choudhary, Walter Eastes","doi":"10.1111/ijag.16652","DOIUrl":"10.1111/ijag.16652","url":null,"abstract":"Globally, the operational energy usage in buildings accounts for about 30% of the final energy consumption and 26% of the energy-related emissions. In 2022, the building sector recorded 132 EJ in energy usage and 9.8 Gt of CO2 emissions. Energy-intensive space heating and air conditioning play a significant role in these statistics, with slightly over half of US home energy usage attributed to them. Thus, energy-efficient buildings, incorporating effective thermal insulation, are essential for addressing climate change. Fiberglass is the dominant insulation material used in US homes, comprising about 71% of installations. The paper discusses the fundamental aspects of heat transfer in fibrous insulation in general and fiberglass insulation in particular. The thermal performance of a fibrous insulation is characterized by an effective thermal conductivity, which combines conductive and radiative terms. The former represents heat conduction through the gas–fiber network and the latter the absorption and the scattering of thermal radiation by the fibers. The paper describes mathematical formulations for these terms and presents results showing the dependence of the effective conductivity on insulation density, fiber diameter, and temperature. The predicted values of the effective conductivity are found to be in good agreement with the measured ones.","PeriodicalId":13850,"journal":{"name":"International Journal of Applied Glass Science","volume":"15 3","pages":"307-316"},"PeriodicalIF":2.1,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139055883","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

Rheology of a sodium-molybdenum borosilicate melt undergoing phase separation 发生相分离的硼硅酸钼钠熔体的流变学特性

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2023-12-17 DOI: 10.1111/ijag.16650

Luiz Pereira, Sophie Schuller, Fabian B. Wadsworth, Jérémie Vasseur, Ricardo F. Lancelotti, Kai-Uwe Hess, Stéphane Gossé, Donald B. Dingwell

{"title":"Rheology of a sodium-molybdenum borosilicate melt undergoing phase separation","authors":"Luiz Pereira, Sophie Schuller, Fabian B. Wadsworth, Jérémie Vasseur, Ricardo F. Lancelotti, Kai-Uwe Hess, Stéphane Gossé, Donald B. Dingwell","doi":"10.1111/ijag.16650","DOIUrl":"10.1111/ijag.16650","url":null,"abstract":"During glass production, phase separation can result in the formation of suspended liquid droplets, which can cause changes in the system rheology. In nuclear waste vitrification context, some new glassy matrices may present this phase separation matter, but the mechanisms controlling the viscosity changes have not yet been determined. Here, we measure the viscosity of a sodium-borosilicate melt containing dissolved MoO3 at different temperatures and subject to different applied shear strain rates. We observe that (i) the viscosity increases sharply as the temperature decreases and (ii) at any constant temperature below 1000°C, the system presents non-Newtonian response. Using transmission electron microscope observations coupled with viscosity calculations, we interpret the cause of the observed changes as the result of phase separation. We show that the viscosity increase on cooling is in excess of the predicted temperature dependence for a homogeneous melt of the starting composition. The increase is due to the formation of a second phase and is controlled by chemical and structural modifications of the matrix during the loss of the elements that form the droplets. This work provides insights into the rheology of a system composed of two composition sets due to a miscibility gap.","PeriodicalId":13850,"journal":{"name":"International Journal of Applied Glass Science","volume":"15 2","pages":"127-138"},"PeriodicalIF":2.1,"publicationDate":"2023-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ijag.16650","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138717441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermally matched chalcogenide glasses with high refractive index contrast for infrared graded-index lenses 具有高折射率对比度的热匹配卤化玻璃，用于红外分级指数透镜

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2023-12-07 DOI: 10.1111/ijag.16651

Qian Chen, Anping Yang, Cheng Ma, Zhijie Yang, Zijun Liu, Xiang Shen, Zhiyong Yang

{"title":"Thermally matched chalcogenide glasses with high refractive index contrast for infrared graded-index lenses","authors":"Qian Chen, Anping Yang, Cheng Ma, Zhijie Yang, Zijun Liu, Xiang Shen, Zhiyong Yang","doi":"10.1111/ijag.16651","DOIUrl":"10.1111/ijag.16651","url":null,"abstract":"Infrared graded-index (GRIN) lenses are desirable for realizing miniaturization and lightweight of infrared imaging systems. Chalcogenide glasses have excellent infrared transparency, good rheological property, and large refractive index range, making them preferred materials for infrared GRIN lenses. In this work, aiming to find thermally matched chalcogenide compositions with high refractive index contrast for preparing GRIN glasses by the stacking diffusion approach, we investigated characteristic temperature, thermal expansion coefficient and refractive index of Ge-As-Se and Ge-As-Se-Te glasses, optimized the glass compositions, and evaluated the feasibility of preparing GRIN glass using the optimized chalcogenide glass powders. It is found that Ge20As20Se20Te40 and Ge12As22Se66 glasses have similar softening temperature (247°C vs. 249°C), reasonably difference of thermal expansion coefficient (3.8 ppm/K), and large refractive index contrast (∼.48). The glass powders with composition xGe20As20Se20Te40-(1-x) Ge12As22Se66 can be hot-pressed into glass disks with good transmittance at the same temperature and pressure. Graded refractive index profile is formed near the interface between the layers after the co-pressed glass is thermally treated. These results demonstrate the prospect of the compositions for preparing infrared GRIN glasses.","PeriodicalId":13850,"journal":{"name":"International Journal of Applied Glass Science","volume":"15 2","pages":"119-126"},"PeriodicalIF":2.1,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138593946","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

Modeling and optimization of the sagging process for large-size and high-purity silica glass synthesis 大尺寸高纯度硅玻璃合成的下垂工艺建模与优化

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2023-12-07 DOI: 10.1111/ijag.16649

Chengshuai Li, Suping Yin, Qianli Ma, Haisheng Fang

{"title":"Modeling and optimization of the sagging process for large-size and high-purity silica glass synthesis","authors":"Chengshuai Li, Suping Yin, Qianli Ma, Haisheng Fang","doi":"10.1111/ijag.16649","DOIUrl":"10.1111/ijag.16649","url":null,"abstract":"Glass sagging is a subsequent process to the CVD process used for large-size and high-purity silica glass synthesis. Physical phenomena taking place in this process are complicated which need an in-depth understanding for better control. In this paper, a comprehensive study is conducted for the sagging process using a level-set and enthalpy-porosity coupled model. With this model, the deforming behavior of glass ingot and evolution of OH uniformly distributed region are well predicted. Then, two performance indices (the effective yield rate and maximum extension radius of OH uniformly distributed region) are proposed based on different applications, and important factors, including geometrical parameters (the ingot initial length, crucible diameter and pedestal height) and operating parameter (the heater power allocation scheme), are explored for their effects on the two indices. The orthogonal test design method is adopted to further determine the collective effects of the four factors. According to the range analysis results, the initial ingot length has the greatest effect, while the crucible diameter has the least effect on the effective yield rate; and for the maximum extension radius, the crucible diameter becomes the major factor, while the pedestal height is the most insensitive factor. The corresponding optimal schemes are proposed for the two indices finally, which are believed to provide useful guidance for improving the sagging process.","PeriodicalId":13850,"journal":{"name":"International Journal of Applied Glass Science","volume":"15 2","pages":"167-181"},"PeriodicalIF":2.1,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138592021","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

The Gladstone–Dale relation: Applications in oxide glasses 格莱斯顿-戴尔关系:在氧化玻璃中的应用

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2023-11-20 DOI: 10.1111/ijag.16648

Elizabeth M. Tsekrekas, Alexis G. Clare

引用次数: 0

A new perspective for nucleation and nanocrystallization from interfacial energy and nanoscale composition fluctuations in glasses 从界面能和纳米级成分波动研究玻璃成核和纳米晶化的新视角

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2023-10-19 DOI: 10.1111/ijag.16646

Takayuki Komatsu, Tsuyoshi Honma

{"title":"A new perspective for nucleation and nanocrystallization from interfacial energy and nanoscale composition fluctuations in glasses","authors":"Takayuki Komatsu, Tsuyoshi Honma","doi":"10.1111/ijag.16646","DOIUrl":"10.1111/ijag.16646","url":null,"abstract":"Nucleation behaviors in glasses/supercooled liquids (SCLs) such as lithium disilicate Li2O–2SiO2, cordierite Mg2Al4Si5O18, fresnoite Ba2TiSi2O8, and K2O–Nb2O5–GeO2/TeO2 glasses were analyzed and discussed from the interfacial energy γ at SCL–nucleus interfaces and nanoscale composition fluctuations. Based on the fragility concept for SCLs and the intrinsic origin of γ, the magnitude order of γ(fragile SCL) < γ(strong SCL) was proposed to be a crucial guide for an understanding of high homogeneous nucleation rates and prominent nanocrystallization. The role of nucleating agent TiO2/ZrO2 in accelerating the nucleation rate in cordierite-based and β-spodumene-type Li2O–Al2O3–SiO2-based glasses was discussed from the new perspective of γ(homoepitaxial-like nucleation) < γ(heteroepitaxial-like nucleation). Ferroelectric nanocrystals such as SrxBa1–xNb2O6 in borate glasses and fluoride nanocrystals such as CaF2 are also well understood from the proposed guidelines. The present article provides a new perspective for nucleation in glasses/SCLs, contributing to the comprehensive composition design of new innovative glass-ceramics.","PeriodicalId":13850,"journal":{"name":"International Journal of Applied Glass Science","volume":"15 1","pages":"3-30"},"PeriodicalIF":2.1,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135779568","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

Cold-cap structure in a slurry-fed electric melter 浆料电熔机的冷帽结构

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2023-09-22 DOI: 10.1111/ijag.16645

Pavel Ferkl, Pavel Hrma, Jaroslav Kloužek, Albert A. Kruger, Richard Pokorný

引用次数: 0

Effect of ZrSnO4 solid solution on the crystallization behavior of Li2O–Al2O3–SiO2 glasses ZrSnO4固溶体对Li2O-Al2O3-SiO2玻璃结晶行为的影响

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2023-09-22 DOI: 10.1111/ijag.16644

Takato Kajihara, Hiroyuki Hijiya, Satoshi Yoshida, Kakeru Ninomiya, Maiko Nishibori, Hikaru Saito, Shigeru Fujino, Satoshi Hata

{"title":"Effect of ZrSnO4 solid solution on the crystallization behavior of Li2O–Al2O3–SiO2 glasses","authors":"Takato Kajihara, Hiroyuki Hijiya, Satoshi Yoshida, Kakeru Ninomiya, Maiko Nishibori, Hikaru Saito, Shigeru Fujino, Satoshi Hata","doi":"10.1111/ijag.16644","DOIUrl":"10.1111/ijag.16644","url":null,"abstract":"Herein, the crystallization behavior of a Li2O–Al2O3–SiO2 (LAS) glass system with the addition of ZrO2 and SnO2 as nucleating agents was investigated using X-ray diffraction, differential scanning calorimetry, four-dimensional scanning transmission electron microscopy, and X-ray absorption fine-structure measurements. At lower heat-treatment temperatures, the addition of ZrO2 and SnO2 afforded a ZrSnO4 solid solution (SS), whereas at higher heat-treatment temperatures, the ZrSnO4 SS decomposed, affording tetragonal ZrO2 and tetragonal SnO2. LAS-based crystalline phases, such as β-quartz and β-spodumene phases SS, were formed after the formation of the ZrSnO4 SS. ZrSnO4 SS particles a few nanometers in size were present in contact with the β-quartz SS particles a few dozen nanometers in size. This suggests that the ZrSnO4 SS served as a crystal nucleus for the β-quartz SS, promoting its growth.","PeriodicalId":13850,"journal":{"name":"International Journal of Applied Glass Science","volume":"15 1","pages":"31-43"},"PeriodicalIF":2.1,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135131306","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

High-throughput laser-based surface functionalization for fabrication of superhydrophobic soda-lime glass 高通量激光表面功能化制备超疏水钠石灰玻璃

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2023-09-04 DOI: 10.1111/ijag.16643

Qinghua Wang, Chao Liu, Kai Yin, Yongqi Zhou, Huixin Wang

{"title":"High-throughput laser-based surface functionalization for fabrication of superhydrophobic soda-lime glass","authors":"Qinghua Wang, Chao Liu, Kai Yin, Yongqi Zhou, Huixin Wang","doi":"10.1111/ijag.16643","DOIUrl":"10.1111/ijag.16643","url":null,"abstract":"Rendering transparent materials extreme wettability, for example, superhydrophobicity or superhydrophilicity, has received considerable attention during the past decades. While fabrication of superhydrophobic glass with high processing efficiency and low production cost has always been a challenge. In this work, a laser-based surface functionalization process that combines ultraviolet (UV) nanosecond laser texturing and silicone oil-assisted heat treatment was employed to render glass superhydrophobicity with high process throughput. The wettability transition is attributed to the combined effects of laser texturing that induces hierarchical surface micro/nanostructures and silicone oil-assisted heat treatment that alters surface chemistry and lowers surface energy. The surface transmittance of the laser-based surface functionalized glass samples in the visible spectrum was experimentally measured and analyzed. The laser-based surface functionalized glass sample also exhibited long-term stability in air, mechanical robustness and good self-cleaning property. More importantly, the developed process shows both high process efficiency and cost effectiveness and has potential for applications where superhydrophobic glass is required.","PeriodicalId":13850,"journal":{"name":"International Journal of Applied Glass Science","volume":"15 1","pages":"57-72"},"PeriodicalIF":2.1,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48508197","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

The influence of Al2O3 concentration on the NaYF4 crystallization in oxyfluoride glass–ceramics Al2O3浓度对氟氧玻璃陶瓷中NaYF4结晶的影响

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2023-09-01 DOI: 10.1111/ijag.16642

Rajesh Dagupati, Mercedes Sedano, Róbert Klement, Jose J. Velázquez, Alicia Durán, Francisco Muñoz, Maria J. Pascual, Dušan Galusek

{"title":"The influence of Al2O3 concentration on the NaYF4 crystallization in oxyfluoride glass–ceramics","authors":"Rajesh Dagupati, Mercedes Sedano, Róbert Klement, Jose J. Velázquez, Alicia Durán, Francisco Muñoz, Maria J. Pascual, Dušan Galusek","doi":"10.1111/ijag.16642","DOIUrl":"10.1111/ijag.16642","url":null,"abstract":"The influence of Al2O3 addition on the precipitation of NaYF4 crystals in oxyfluoride glasses has been investigated through the thermal, structural, and optical characterization of the parent glasses and corresponding glass–ceramics (GCs). The high-resolution transmission electron microscopy analysis of the GC with 5 mol% of Al2O3 shows the presence of phase-separated droplets about 69 nm in size containing several NaYF4 nanocrystals with the diameter of about 10–15 nm. Raman and magic angle spinning nuclear magnetic resonance (MAS-NMR) spectroscopy were used to examine the structural changes attributed to the addition of Al2O3. The 19F MAS-NMR analysis indicated that fluorine atoms are present in different chemical environments (Na–F, Na–Si–F, Na–Al–F, and NaYF4). The increasing amount of Al2O3 reduces the crystallization of NaYF4 phase due to the increased fraction of fluorine bound in Na–Al–F environments. The visible luminescence investigation of the glasses and GCs demonstrated that the intensity of Er3+ ions emission transitions in the GCs was higher than that of the parent glass. This difference was attributed to the presence of Er3+ ions bound in NaYF4 crystalline phase. Further evidence that the Er3+ ions were present in NaYF4 phase was provided by the fact that the excited level Er3+:4S3/2 lifetime was increased in GCs as compared to parent glass.","PeriodicalId":13850,"journal":{"name":"International Journal of Applied Glass Science","volume":"15 1","pages":"44-56"},"PeriodicalIF":2.1,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ceramics.onlinelibrary.wiley.com/doi/epdf/10.1111/ijag.16642","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47357081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0