International Journal of Applied Glass Science最新文献_第10页

Mechanical properties of ion-exchanged alkali aluminosilicate glass 离子交换碱金属硅铝酸盐玻璃的力学性能

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2022-06-18 DOI: 10.1111/ijag.16595

Bruno Nunes, Inês Pinho, Jorge Cruz Fernandes, Rui M. Almeida, Luis F. Santos

{"title":"Mechanical properties of ion-exchanged alkali aluminosilicate glass","authors":"Bruno Nunes, Inês Pinho, Jorge Cruz Fernandes, Rui M. Almeida, Luis F. Santos","doi":"10.1111/ijag.16595","DOIUrl":"10.1111/ijag.16595","url":null,"abstract":"Aluminosilicate glasses present good optical and mechanical properties, but their mechanical behavior can be further improved by thermal or chemical treatments, making them suitable for applications requiring high hardness and fracture strength, for example, laptop monitors or mobile phone screens. A lithium aluminosilicate composition was prepared, and ion exchanged in a KNO3 bath at different temperatures for various times. Density and UV–vis transmission were measured before and after ion exchange of the glass, together with the mechanical properties, namely, Young's modulus, Poisson's ratio, shear modulus, Vickers hardness, indentation fracture toughness, and equi-biaxial bending strength, whose results were treated by Weibull statistics. The initial glass composition presented a Vickers hardness of 620 ± 10 HV, a Young's modulus of 87 ± 1 GPa, and a fracture toughness of 1.7 ± .1 MPa.m1/2. After ion exchange, the Vickers hardness of the glass increased to average values of 716 HV for 12 h at 450°C and 728 HV for 30 h at 420°C, while the fracture toughness increased to 2.2 ± .1 MPa.m1/2, confirming the improvement of the mechanical properties. These results have been compared with two commercial glasses: a monitor glass from a laptop computer and a glass normally used in mobile phone screens.","PeriodicalId":13850,"journal":{"name":"International Journal of Applied Glass Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2022-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45647051","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

Fracture mechanisms of sodium silicate glasses 硅酸钠玻璃的断裂机理

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2022-06-12 DOI: 10.1111/ijag.16594

Jessica M. Rimsza, Reese E. Jones

{"title":"Fracture mechanisms of sodium silicate glasses","authors":"Jessica M. Rimsza, Reese E. Jones","doi":"10.1111/ijag.16594","DOIUrl":"10.1111/ijag.16594","url":null,"abstract":"Reactive classical molecular dynamics simulations of sodium silicate glasses, xNa2O–(100 − x)SiO2 (x = 10–30), under quasi-static loading, were performed for the analysis of molecular scale fracture mechanisms. Mechanical properties of the sodium silicate glasses were consistent with experimentally reported values, and the amount of crack propagation varied with reported fracture toughness values. The most crack propagation occurred in NS20 systems (20-mol% Na2O) compared with the other simulated compositions. Dissipation via two mechanisms, the first through sodium migration as a lower activation energy process and the second through structural rearrangement as a higher activation energy process, was calculated and accounted for the energy that was not stored elastically or associated with the formation of new fracture surfaces. A correlation between crack propagation and energy dissipation was identified, with systems with higher crack propagation exhibiting less energy dissipation. Sodium silicate glass compositions with lower energy dissipation also exhibited the most sodium movement and structural rearrangement within 10 Å of the crack tip during loading. Therefore, high sodium mobility near the crack tip may enable energy dissipation without requiring formation of structural defects. Therefore, the varying mobilities of the network modifiers near crack tips influence the brittleness and the crack growth rate of modified amorphous oxide systems.","PeriodicalId":13850,"journal":{"name":"International Journal of Applied Glass Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2022-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49586308","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: 2

Correlating structure with mechanical properties in lithium borophosphate glasses 硼磷酸锂玻璃结构与力学性能的相关性

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2022-06-08 DOI: 10.1111/ijag.16592

Pengfei Liu, Randall E. Youngman, Lars R. Jensen, Morten M. Smedskjaer

{"title":"Correlating structure with mechanical properties in lithium borophosphate glasses","authors":"Pengfei Liu, Randall E. Youngman, Lars R. Jensen, Morten M. Smedskjaer","doi":"10.1111/ijag.16592","DOIUrl":"10.1111/ijag.16592","url":null,"abstract":"Connecting structure with mechanical properties is needed for improving the mechanical reliability of oxide glasses. Although the mechanical properties of silicate and borosilicate glasses have been intensively studied, this is not the case for phosphate and borophosphate glasses. To this end, we here study the structure, density, glass transition, hardness, elasticity, and cracking behavior of lithium borophosphate glasses. The glasses are designed with different B/P ratios to access different boron and phosphorus speciation. The introduction of boron in the phosphate network increases the average network rigidity because of the reduction in the fraction of nonbridging oxygens as well as the exchange of phosphate groups with more constrained BO4 groups. These structural changes result in an increase in density, Vickers hardness, glass transition temperature, and Young's modulus, and a decrease in Poisson's ratio for higher B2O3 content. Furthermore, the increase in network rigidity and atomic packing density results in a lower ability of the glasses to densify upon indentation, resulting in an overall decrease in crack initiation resistance. Finally, we find an increase in the fraction of trigonal boron units in the high-B2O3 glasses, which has a significant effect on atomic packing density and Vickers hardness.","PeriodicalId":13850,"journal":{"name":"International Journal of Applied Glass Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2022-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ijag.16592","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47578456","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: 2

Equipment for in situ measurement of machining defects of large aperture optical elements 大口径光学元件加工缺陷原位测量设备

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2022-06-08 DOI: 10.1111/ijag.16593

Guipeng Tie, Haifeng Zhou, Feng Shi, Jian Chen, Shuo Qiao, Ye Tian, Ci Song

引用次数: 0

Thermal treatment of ion-exchanged glass 离子交换玻璃的热处理

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2022-05-30 DOI: 10.1111/ijag.16590

Guglielmo Macrelli, Arun K. Varshneya, John C. Mauro

引用次数: 1

Spectroscopic investigations of Dy3+-doped tungstate–tellurite glasses for solid-state lighting applications 用于固态照明应用的Dy3+掺杂钨酸碲化物玻璃的光谱研究

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2022-05-30 DOI: 10.1111/ijag.16591

Vikas, Mula Jayasimhadri, Divi Haranath

{"title":"Spectroscopic investigations of Dy3+-doped tungstate–tellurite glasses for solid-state lighting applications","authors":"Vikas, Mula Jayasimhadri, Divi Haranath","doi":"10.1111/ijag.16591","DOIUrl":"10.1111/ijag.16591","url":null,"abstract":"A series of Dy3+-activated lithium–tungstate–tellurite (LTT) glasses have been synthesized employing a conventional melt quenching procedure. The structural and luminescent features of LTT glasses were examined in detail to reveal their feasibility in solid-state lighting (SSL) applications. Various physical parameters such as density, molar volume, and other parameters were evaluated. A broad hump showed in the X-ray diffraction profile affirms the non-crystalline or amorphous behavior of the as-prepared LTT glasses. The absorption spectrum exhibits several bands between the 400 and 1800 nm range, which confirms that the transitions initiate from the lowest energy state (6H15/2) to numerous excited states. Photoluminescence (PL) spectra reveal three significant peaks centered at 481 (blue), 575 (yellow), and 664 nm (red) related to Dy3+ ions under 388 nm excitation. The chromaticity coordinates of LTT glasses were situated in the white light region and nearest to the standard white light (0.33, 0.33). The decay profile shows the biexponential behavior of the prepared LTT (x = 0.1, 1.0, and 2.0 mol%) glasses. Temperature-dependent PL spectra show appreciable thermal constancy of the prepared LTT glasses having a high value of activation energy. The previous results indicate that Dy3+-doped tungstate–tellurite glasses are potential luminescent materials to utilize in SSL applications, especially for white light-emitting diodes.","PeriodicalId":13850,"journal":{"name":"International Journal of Applied Glass Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47099563","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: 2

Excellent properties of Ga-doped ZnO film as an alternative transparent electrode for thin-film solar cells 镓掺杂ZnO薄膜作为薄膜太阳能电池透明电极的优良性能

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2022-05-17 DOI: 10.1111/ijag.16585

Shou Peng, Wei Wang, Tingting Yao, Min Guan, Zhiping Gan, Jingyuan Chu, Linlin Gai

引用次数: 2

Structure and luminescent properties of Sm/Dy-doped Sr2MgSi2O7 glass–ceramics Sm/Dy掺杂Sr2MgSi2O7微晶玻璃的结构与发光性能

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2022-05-15 DOI: 10.1111/ijag.16584

Laura Fernández-Rodríguez, Rolindes Balda, Joaquín Fernández, Alicia Durán, María Jesús Pascual

{"title":"Structure and luminescent properties of Sm/Dy-doped Sr2MgSi2O7 glass–ceramics","authors":"Laura Fernández-Rodríguez, Rolindes Balda, Joaquín Fernández, Alicia Durán, María Jesús Pascual","doi":"10.1111/ijag.16584","DOIUrl":"10.1111/ijag.16584","url":null,"abstract":"Sm3+-doped and Sm3+/Dy3+ codoped SiO2–SrO–MgO glasses were prepared by conventional melt quenching and Sr2MgSi2O7 based glass–ceramics from sintering and crystallization of the glass powders. The thermal, structural, and optical properties of the glasses and glass–ceramics were investigated as a function of the dopant concentration. The optical characterization includes the photoluminescence spectra and the lifetimes of the 4G5/2 (Sm3+) and 4F9/2 (Dy3+) excited states. In Sm3+ single-doped samples, the emission intensity increases up to a concentration of 0.3 mol% Sm3+ ions and then decreases due to nonradiative energy transfer processes. The emission spectra in the glass–ceramics show a more resolved structure and higher intensity compared to the glass samples, suggesting a different and crystalline environment for the Sm3+ ions. The non-radiative processes also influence the experimental decays of the glass samples which deviate from a single exponential with lifetimes decreasing as Sm3+ concentration increases. The emission and excitation spectra of the codoped samples do not show significant energy transfer between Sm3+ and Dy3+ ions. Different emitting colors can be obtained in the codoped glasses by changing the excitation wavelength. The studied glass–ceramics could be applied as enamels on ceramic or metallic substrates.","PeriodicalId":13850,"journal":{"name":"International Journal of Applied Glass Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ijag.16584","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49037044","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: 1

Nanoscale composition fluctuations and crystallization process: Case study in Li2O–SiO2-based glasses 纳米级成分波动和结晶过程:以li2o - sio2基玻璃为例

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2022-04-29 DOI: 10.1111/ijag.16583

Takayuki Komatsu, Tsuyoshi Honma

{"title":"Nanoscale composition fluctuations and crystallization process: Case study in Li2O–SiO2-based glasses","authors":"Takayuki Komatsu, Tsuyoshi Honma","doi":"10.1111/ijag.16583","DOIUrl":"10.1111/ijag.16583","url":null,"abstract":"Nanoscale composition fluctuations in Li2O–SiO2-based glasses were analyzed and discussed from the data on the structure and crystallization process reported so far to enter deeply into the medium-range ordered structure of multicomponent oxide glasses. Li2O is proposed to have a strong tendency for dynamical heterogeneous structure, that is, the formation of fragile Li2O-rich regions with small SiO2 contents, resulting in the initial crystallization of metastable Li2SiO3 prior to the formation of stable Li2Si2O5 in Li2O–2SiO2-based glasses. Li2O–Ga2O3/Nb2O5–SiO2 glasses are proposed to have nanoscale composition fluctuations of Li2O–Ga2O3/Nb2O5-rich regions, resulting in the initial formation of LiGa5O8 and LiNbO3 nanocrystals. In Li2O–Al2O3–SiO2 glasses, the distribution width of composition fluctuations is proposed to be narrow, resulting in the initial crystallization of metastable β-quartz solid solutions Li2O·Al2O3·nSiO2 (n = 6–8). Additive P2O5 and NiO leading to an enhanced nucleation are proposed to be present in fragile Li2O-rich regions.","PeriodicalId":13850,"journal":{"name":"International Journal of Applied Glass Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46986321","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: 5

A comprehensive study of the batch-to-melt conversion process of a high-boron alkaline earth aluminosilicate glass 高硼碱土铝硅酸盐玻璃间歇-熔融转化工艺的综合研究

IF 2.1 3区材料科学

International Journal of Applied Glass Science Pub Date : 2022-04-19 DOI: 10.1111/ijag.16582

Hong Li, Manuela Reben, Jason Dobyne, Qingwei Wang, Xiaoyun Liu

引用次数: 1