Types Of Glass Research Articles

Study on Chemical Composition Analysis and Methods of Ancient Glass Relics

In this paper, the relationship between the surface weathering of glass artifacts and the type, decoration, and color of glass was visualized by using a columnar table analysis[1], and the relationship between the three factors on the surface weathering was tested separately for significance by using a chi-square test; in addition, a multi-factor ANOVA was used to analyze whether the three factors of the type, decoration, and color of glass and their interaction on the surface weathering of glass artifacts had The significant relationships were analyzed by multivariate ANOVA. Then, the relative contributions of different types of glass to the prediction accuracy of the model were ranked by importance according to the proportion of chemical components before and after weathering at each sample point through random forest, and the chemical components were selected according to the importance ranking, and after removing most of the unimportant chemical components, the final retained chemical components were used to construct the final random forest regression model to obtain the laws of their classification, and finally the corresponding The results were obtained. The chemical components such as calcium oxide, copper oxide, iron oxide, and nitrogen oxide were drawn for visual analysis according to their importance, and we compared the derived results with the known literature and found that they were consistent with the results classified by the known literature.

Research on glass products classification based on machine learning

In order to analyze the classification rules of ancient Chinese high-potassium glass and lead-barium glass and select the appropriate chemical composition for each category to divide them into subcategories, this paper models the type and chemical composition of glass by random forest algorithm, divides the data by 3:7 and uses 3-fold cross-validation, and uses Accuracy, Recall, Precision and F1-score to evaluate the model after training, and the results are optimal. The strongly correlated chemical components under each glass category were obtained by using the K-Means clustering algorithm, and the clustering results were visualized by using unsupervised learning, and the subclass division results were better when k was taken 2 after visualizing different cluster data. Finally, the results of subclassification are visualized and the rationality and sensitivity analysis of the method are carried out, and it is found that the method is accurate.

Exploration of the composition of ancient glass artifacts based on optimization algorithms

The Silk Road facilitated exchanges between East and West, where glass played a significant role. However, ancient glass artifacts are susceptible to weathering, leading to changes in their chemical composition. This article explores the relationship between weathering and explanatory variables of glass type, color, and decoration. It presents a method for predicting the weathering degree of glass artifacts and their chemical composition content before weathering. Descriptive statistics are used to calculate the weathering degree and variation of each chemical component content, allowing for quantification of the impact of weathering on the proportion of chemical components. Logistic regression is used to obtain regression coefficients of the weathering degree and other attributes. Various measures, including correlation coefficients and significance tests, are calculated to assess the predictive power of the explanatory variables. The proposed method is valid for predicting the chemical composition proportion data before weathering, which aids further research in the archaeological field. Overall, this article provides a comprehensive approach to understanding the effect of weathering on ancient glass artifacts and predicting their chemical composition content before weathering.

Exploration And Analysis of Weathering Factors of Glass Artefacts Based on Cluster Analysis and Grey Correlation Analysis

The aim of this paper is to investigate the relationship between the chemical composition of ancient glass artefacts after weathering and to construct a model for classifying and predicting the class of artefacts based on some of the characteristics of the ancient glass artefacts obtained. Cardinality tests, information entropy, cluster analysis, support vector machines and grey correlation are mainly used to conduct the study. Through chi-square test, the relationship between weathering of glass relics and glass type, glass color and glass pattern is explained. Finally, the relationship between weathering and glass type is closer. Information entropy was used to explain the relationship between the weathering of cultural relics and the content of chemical components contained in cultural relics. Among them, potassium oxide ( O) and calcium oxide (CaO) had the largest information gain. The effective information gain of lead barium is silicon dioxide (Si ), potassium oxide (PbO), copper oxide (CuO) and sodium oxide ( O). By using cluster analysis, the law analysis and corresponding subcategories of high-potassium cultural relics and lead-barium cultural relics are made, and 3-5 subcategories are formed. Support vector machine was used to judge the type of glass relics, and the final result was that A1, A6 and A7 were high potassium. A2, A3, A4, A5, A8 are lead barium; The correlation coefficient matrix was used to analyze the correlation between the chemical components in different kinds of cultural relics, and the differences were explained based on the results of grey correlation degree analysis. Finally, the conclusion was drawn: in the firing process of high-potassium glass, the substance with high potassium content as the co-solvent did not have an essential effect on the formation of high-potassium glass. However, lead barium glass is different. As lead ore (high content of lead oxide and barium oxide) is added as co-solvent in the firing process, lead barium glass produced by firing contains a large amount of lead oxide and barium oxide.

Chemical composition analysis and type identification of ancient glass products

In this paper, the chemical composition analysis and type identification of ancient glass products are studied. Firstly, the qualitative analysis is changed into quantitative analysis, the type of glass, pattern and color are treated quantitatively, and the Chi-square test model is established. On this basis, the Chi-square cross thermal map is output to analyze the correlation degree of samples. The results of effect quantification are obtained. In order to study the division method and results of the internal chemical components of high potassium glass and lead barium glass, the principal component analysis method was adopted to reduce the dimension of the chemical components. Then train the data and build the model. This paper discusses the differences of correlation between chemical constituents of different types of cultural relics samples from the perspective of statistics.

Environmental impact assessment of the manufacturing of glass packaging solutions: Comparative scenarios in a developing country

The manufacturing of glass packaging is an energy and resource intensive process and the demand for glass packaging is increasing because of rising world population, especially in the developing countries. However, although a significant amount of glass packaging is produced in developing countries, there is limited research focused on the environmental impact assessment and analysis of the glass manufacturing activities. Thus, in order to fill this research gap, this paper reports a comprehensive life cycle assessment (LCA) for the manufacturing of glass packaging in Pakistan. The LCA was conducted for three different types of glass (amber, flint and green) packaging solutions. The study was based on cradle-to-gate perspective, while considering 1-ton of glass produced as the functional unit. The primary data were collected from a well-known glass industry located in one of the dedicated industrial zones in Pakistan. SimaPro V 9.2. was used as the software tool and environmental impacts were quantified at midpoint and endpoint levels using ReCiPe 2016 method. The results indicated that extraction and processing of raw materials, and the plant-based glass production process cause worst impacts on the environment. More specifically, the consumption of natural gas for glass melting and the electricity from the national grid are the most contributing elements at the plant level. At midpoint level, comparatively green glass has the highest impact in various impact categories, such as global warming, fresh water ecotoxicity, marine ecotoxicity, etc. At endpoint level, human health is mainly impacted among various areas of protection. Overall, green glass remains the dreadful option for human health in comparison with other glass types. Alternative scenarios were also generated for all three packaging solutions by changing the energy-mix, especially to see the difference in greenhouse gas emissions. The study also outlines various important implications. As this is the first such study, it may be used as a benchmark for further environmental impact assessment studies for glass packaging industry, especially in developing countries.

A Study on Transparent Type Envelope Material in Terms of Overall Thermal Transfer, Energy, and Economy for an Office Building Based on the Thai Building Energy Code

Energy consumption in buildings has increased significantly as population and economic activities are concentrated in urban areas. Air conditioning accounts for a significant percentage of energy consumption in buildings, especially in tropical climates. The main area where heat can be transferred into the building is through glass windows. Thus, this study aims to evaluate feasibility in terms of overall thermal transfer value (OTTV), energy, and economics for retrofitting different glass materials in an office building in Thailand by using building energy code (BEC) software. The software uses Thailand’s building energy code as the standard to evaluate the energy performance of the case study building in comparison with different glass types used in retrofitted cases. From an economic perspective, the internal rate of return (IRR) and discounted payback periods (DPP) were used as determining indexes. The results demonstrated that retrofitted windows with the best energy-efficient glass might achieve energy performance, but installation cost can reduce economic feasibility, while the glass with the second lowest heat transfer coefficient can reduce the OTTV by 68.89% and building energy consumption by 16.87%. However, it can achieve the highest economic performance with 10.70% IRR and DPP at 11.83 years. Therefore, the balance between energy and economic factors must be considered to provide energy-efficient and investment-friendly glass materials for retrofit projects. In addition, the study focuses specifically on tropical climates. Thus, the finding may not be reflected similarly for buildings located in different regions.

Trade, use, offer. The hoard of Bánov – “Skalky” (CZ)

Hoards disappeared from the regions of the “heart” of Hallstatt Europe. As for the peripheral areas, which include Moravia, the situation was different. The elite Hallstatt hoard from Bánov – “Skalky”, Uherské Hradiště District (CZ), dating to 575–550 BCE, proves that some regions did not abandon their “old Bronze-Age habits”. The hoard is among the most exclusive set of discoveries dating to the Hallstatt Period found in the Czech Republic. Its 1.500–2.000 pieces of amber beads represent the largest individual prehistoric set of amber in the Czech Republic. In the 6th century BCE, the eastern part of what is now the Czech Republic (Moravia) was the primary transit region of the Baltic amber to the Mediterranean. Extensive barter trade took place along the route of the Amber Road. Included in the Bánov hoard were exclusive women’s jewellery items which were evidently exchanged for amber. It is a set of dragon fibulae from contemporary Slovenia. This article describes the circumstances of the discovery, offers a detailed catalogue of the findings, introduces a chronological-typological analysis of the inventory and proposes the origin of the artefacts. An analysis of the composition and origin of glass by Scanning electron microscopy (SEM-EDS) and of amber by IR spectrometry was carried out in this study. Chemical analysis of glass determined the colouring agents and the composition, which points to the possible origin of the analysed items. While amber corresponds to the Baltic spectrum, analysis of the glass revealed surprising findings. Most of the beads do not correspond to the expected natron glass type but to an older mixed alkali type. Furthermore, an overview of the deposition of hoards in Moravia and the methodology of studying the deposition is presented. A model of long-distance trade on the Amber Road and its chronological background are also outlined. The authors discuss the social structure, elites, long-distance trade on trade routes north of the East Hallstatt culture region, and the assumed ceremony surrounding the creation of hoards.

Low-temperature sintering and phase component modulation of 0.95MgTiO3–0.05CaTiO3 microwave dielectric ceramics

This study prepared glass doped 0.95MgTiO3–0.05CaTiO3 (95MCT) ceramics with excellent microwave dielectric properties via phase constituent regulation. Based on XRD and semi-quantitative analysis, it is found that the types of glass, addition amounts of glass, and sintering method can introduce different phase compositions. With the aid of the low softening point for glass materials and the liquid phase sintering mechanism, the 95MCT ceramics can be densified at a relatively low temperature. Meanwhile, based on the mixture rule, adjusting the proportion of each phase structure by altering the sintering method, the optimum temperature (1200 °C) for 95MCT ceramics is reduced by about 200 °C without deteriorating performance. Typically, the 95MCT ceramic doped with 1 wt % ZnO–B2O3–SiO2 glass demonstrates excellent microwave dielectric properties: εr = 18.3, Q × f = 50824 GHz (@7.9 GHz).

Effect of window-glass type on solar heat gain and velocity and temperature distributions inside air-conditioned rooms – A conjugate numerical analysis

Conjugate mixed-convection numerical analysis is conducted in order to investigate effect of employing different types of window glass on solar heat gain in air-conditioned rooms using mixing air-distribution system. ANSYS Fluent and RNG k-ε turbulence model are utilized. Single- and double-pane clear and tinted window glass are considered with window-to-wall ratio of 0.33. The rate of air change per hour (ACH) is varied in range 5–20. Part of solar radiation absorbed by glass is conducted indoor while solar radiation transmitted through glass heats portion of floor and is released as a heat source to inner space. The numerical model is validated against measurements available under simpler conditions. Results of model application show that airflow pattern and temperature distribution are sensitive to the solar heat gain and, hence, to the type of glass used. It is found that air-conditioning load due to window glass heat gain is reduced by 55% by using double-pane tinted glass compared to using single-pane clear glass. A criterion to distinguish between forced and mixed convection situations in terms of ACH is also developed. In addition, further calculations are made using standard k-ω turbulence model and satisfactory agreement with RNG k-ε model results is obtained.

Types of architectural glass to improve the energy efficiency of glass buildings

The paper explores into key types of glass that are widely used in the construction of glass facades. The right combination of glass and glass structures at the design stage minimizes potential issues in operating the build-ing, optimizes and improves its energy efficiency, as well as enhances visual and thermal comfort inside.

Trade with the West. Glass bowls of Eastern Mediterranean origin found in the courtyard of the Casas del Turuñuelo site (Guareña, Badajoz, Spain): Archaeological context, analysis and conservation

The aim of this work is presenting a group of glasses excavated from the archaeological site Casas del Turuñuelo (Guareña, Badajoz, Spain), whose destruction dates back to the 5th Century BCE. Different types of glasses were found, among them two thick-walled translucent bowls and a very fine blue-coloured bowl. The study and conservation of these pieces has made it possible to characterize the composition of the different types of glass and their specific degradation, and to identify the possible origin where they were manufactured, in the Eastern Mediterranean. In addition, it has managed to recover the original surface and shape of these pieces and has given them the necessary consistency to be well preserved and studied.

Clinical and genetic characteristics of primary hypertrophic osteoarthropathy

Background. Primary hypertrophic osteoarthropathy is a rare genetically heterogeneous disease with three clinical variants. The classic one is a combination of hyperostosis, arthropathy and pachyderma and two variants with damage to only bone structures or pachyderma. Two genes responsible for the occurrence of primary hypertrophic osteoarthropathy have been identified: HPGD (debut age up to one year) and SLCO2A1 (debut in puberty and adolescence), whose products are involved in prostaglandin E2 metabolism. Two recurrent variants were identified in the HPGD gene: c.175_176delCT(p.Leu59fs) in patients from Europe and c.310_311delCT in patients from China. There were no clinical and genetic correlations in patients with different variants in the identified genes, which may be due to a small number of observations. The analysis of clinical manifestations in patients with newly identified variants or previously unidentified combinations of variants in a compound‑heterozygous state helps to understand the pathogenesis and prognosis of the course of the disease.Aim. To present the clinical and genetic characteristics of two Russian patients with primary hypertrophic osteoarthropathy caused by a newly identified combination of nucleotide variants in a compound‑heterozygous state in the HPGD and SLCO2A1 genes.Materials and methods. Clinical examination, radiography of the skeleton and chest, electrocardiography, echocardiography. Confirmation of the pathogenicity of the identified variants and clarification of the type of disease was carried out using automatic Sanger sequencing.Results. The clinical and genetic characteristics of two unrelated patients with primary hypertrophic osteoarthropathy caused by an undescribed combination of variants in the compound heterozygous state in the HPGD and SLCO2A1 genes were analyzed. In a patient with variants in the SLCO2A1 gene, the disease debuts at the age of 14 with deformities of the fingers, nails on the hands and feet, followed by the addition of burning pain in the distal parts of the arms and legs. At the age of 33, the examination revealed deformity of the fingers of the hands and feet by the type of drumsticks and nails by the type of watch glasses, enlargement of the knee joints, pronounced arthralgia. There were no signs of pachyderma. The new generation sequencing revealed two variants in the SLCO2A1 gene c.764G>A(p.Gly255Glu) in exon 6 and c.1333C>T(p.Arg445Cys) in exon 10. These variants were identified earlier in a compound‑heterozygous combination with other variants in patients with the classical phenotype of the disease, which were not present in the patient we observed. A feature of the case was pronounced hyperhidrosis and burning pain in the extremities, which may be due to stimulation of nociceptors in the musculoskeletal structures.Deformities of the fingers, nails of the hands and feet occurred in a patient with variants in the HPGD gene at 6 months. At the age of 9 years, a change in shape, stiffness and arthralgia of the knee and elbow joints without pachyderma were revealed. The identified variant with c.175_176delCT(p.Leu59fs) in this gene is often found in patients from European countries, and the other is c.1A>G(p.Met1?) discovered for the first time.Conclusion. The results allow us to conclude that when we found combinations of two variants in the HPGD and SLCO2A1 genes, there will be no pachyderma in the spectrum of clinical manifestations of primary hypertrophic osteoarthropathy. Sequencing of the new generation exome is the optimal diagnostic method.

Bioactive Glass-Enhanced Resins: A New Denture Base Material.

The creation of the denture base material with bioactive properties that releases ions and produces hydroxyapatite. Acrylic resins were modified by the addition of 20% of four types of bioactive glasses by mixing with powders. Samples were subjected to flexural strength (1, 60 days), sorption and solubility (7 days), and ion release at pH 4 and pH 7 for 42 days. Hydroxyapatite layer formation was measured using infrared. Biomin F glass-containing samples release fluoride ions for a period of 42 days (pH = 4; Ca = 0.62 ± 0.09; P = 30.47 ± 4.35; Si = 22.9 ± 3.44; F = 3.1 ± 0.47 [mg/L]). The Biomin C (contained in the acrylic resin releases (pH = 4; Ca = 41.23 ± 6.19; P = 26.43 ± 3.96; Si = 33.63 ± 5.04 [mg/L]) ions for the same period of time. All samples have a flexural strength greater than 65 MPa after 60 days. The addition of partially silanized bioactive glasses allows for obtaining a material that releases ions over a longer period of time. This type of material could be used as a denture base material, helping to preserve oral health by preventing the demineralization of the residual dentition through the release of appropriate ions that serve as substrates for hydroxyapatite formation.

Environmentally friendly use of rice husk ash and recycled glass waste to produce ultra-high-performance concrete

The issue of environmental pollution is one of the most pressing concerns today. A number of measures need to be taken to reduce the effects of waste materials such as rice husks, glass, plastic, and other types of materials on the environment. A significant reduction in environmental pollution can be achieved by utilizing these waste materials in construction. The purpose of this study was to investigate the use of rice husk ash (RHA) as a pozzolanic material to partially replace cement in a previously optimized mixture of recycled-glass-based Ultra-high-performance concrete (UHPC). Furthermore, this study included commercial mineral admixtures such as silica fume and limestone powder along with these components. Based on the results of the study, it can be concluded that the use of RHA in the optimized recycled glass UHPC renders the concrete much less workable and also leads to a marginal decrease in its compressive strength (by about 7%). Additionally, the study demonstrates a significant interaction between RHA and water content, attributed to the water-absorbing capacity of RHA particles, which also provides an internal curing effect. Ultimately, incorporating RHA as a partial replacement for cement in the optimized recycled-glass-based UHPC enables a substantial decrease in the concrete's carbon footprint, without causing significant harm to its performance, thereby promoting an environmentally friendly approach to concrete production.

Early Islamic glass (7th- 10th centuries AD) in Unguja Ukuu, Zanzibar: A microcosm of a globalised industry in the early 'Abbasid period.

Eighty-two glass vessels, recovered from the excavations at the ancient Swahili settlement and port of Unguja Ukuu in Zanzibar, Eastern Africa, were analysed using laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS). The results show that all of the glass samples are soda-lime-silica glass. Fifteen glass vessels belong to the natron glass type and are characterised by low MgO and K2O (<1.50%), suggesting they were made from natron, a mineral flux that was widely used during the Roman period and Late Antiquity. Sixty-seven glass vessels belong to the plant ash glass type, characterised by high magnesia and potash levels (>1.50%), suggesting plant ash was the main alkali flux. Based on the major, minor and trace elements, three different compositional groups were identified for the natron glass and three were identified for the plant ash glass: (1) UU Natron Type 1, (2) UU Natron Type 2, (3) UU Natron Type 3, (4) UU Plant ash Type 1, (5) UU Plant ash Type 2 and (6) UU Plan ash Type 3. Comparison with contemporary Middle Eastern glass groups shows that UU Natron Types 1, 2 and 3 correspond to Egypt II high Na2O, Levantine I and Levantine II respectively, while UU Plant ash Type 1 matches closely with Samarra Group 2. UU Plant ash Types 2 and 3 have unique chemical fingerprints that do not match any of the contemporary plant ash glass groups, but their chemical compositions show some affinity with the old Sassanian plant ash glass, suggesting a possible Mesopotamian provenance. Combined with existing research on early Islamic glass, the authors reveal a complex trading network in the globalisation of Islamic glass, particularly involving glass corresponding to modern Iraq and Syria, in the 7th- 9th centuries AD.

Thermal compensation design of achromatic andapochromatic optical systems using a 3D glass chart.

It is important to determine the ideal combination of housing materials, groups of refractive materials, and their optical powers for athermalizing achromatic and apochromatic optical systems. This study proposes a combined design approach that utilizes three or more glass types to resolve thermal aberrations and defocus achromatic and apochromatic optical systems. It selects a suitable glass type using a 3D glass chart and calculates the optical power analytically. Furthermore, a temperature-insensitive optical system with a 450-750nm band based on refractive materials (CDGM Glass Co., Ltd.) is designed, with the modular transfer function value of the center field of view decreasing by less than 0.024 in the temperature range of -40∘ C to +80∘ C and the secondary spectrum aberration decreasing by over three times and being maintained within 0.08mm.

High-resolution and localized parametric embodied impact calculator of PV systems

Buildings are responsible for a large amount of greenhouse gas emissions in the world. In order to decarbonize the electricity grid and reduce the environmental impact of the building stock, photovoltaic panels can be installed. However, in order to assess the environmental impact of PVs, the whole life cycle has to be considered including embodied emissions. Several options for photovoltaics exist on the market or are under development including silicon-based panels, thin films, and third generation panels. Currently, many configurations of the panels exist making it difficult to estimate the embodied impact. The goal of this paper is to close this gap by providing a parametric PV carbon calculator for designers and decision-makers. In this study, the embodied impact of different PV types and configurations is assessed. First, the life cycle inventories data and bill of quantities for different generations’ panel types are gathered. Second, life cycle impact assessment is performed. The results of the analysis are presented in a form of a software application allowing users to select the panel’s composition, e.g., frame and glass type, cell type, encapsulant, etc. The developed application will assist in understanding the impact of choices made in regards to PV systems and will support engineers and architects in the selection of the photovoltaic panels from embodied impact perspective.

Manufacturing Technology and Usage of Glass Fragments in Jahangir Dome and Goriye, Sasanid Sites in Western Iran

This article introduces the Sasanid glass found during excavations at the western Iranian sites of Jahangir Dome and Goriye in Ilam province. In addition to architectural remains, different types of Sasanid pottery, glass, and metal vessels were found at these sites. Considering the importance of the glass industry in this period, the purpose of this article is to study the typological styles and chemical compositions of the glass fragments excavated at Jahangir Dome and Goriye to identify the origin of the vitreous materials. Glass fragments from these sites are divided into four groups based on the form and typology and include: vessel fragments, cosmetic containers, bracelets, and beads. According to the elemental analysis, silicon dioxide, sodium oxide, and calcium oxide are the main chemical components in the studied samples, and analyzed glass materials are of a plant-ash silica-soda-lime glass-type.

Progress, challenges, and perspectives on polymer substrates for emerging flexible solar cells: A holistic panoramic review

AbstractIn pursuit of a renewable, inexpensive, sustainable, and compact energy source to replace fossil fuels, solar photovoltaic devices have become an ideal alternative to meet human needs for environmentally friendly, affordable, and portable power sources. It is due to their excellent mechanical robustness and outstanding energy conversion efficiency. Concerning the increasing demand for flexible and wearable electronic devices with standalone power sources, much attention has been paid to photovoltaics' flexibility and lightweight developments. Along with high mechanical flexibility and lightweight, flexible photovoltaic devices have the advantages of conformability, bendability, wearability, moldability, and roll‐to‐roll processing into complex shapes that can produce niche products. Emerging solar cells, among other photovoltaic technologies, have been exalted for their high conversion efficiency, low cost, and ease of production, making them a viable new‐generation photovoltaic technology. The main commercialization choice for cutting‐edge solar cells is flexible dye‐sensitized and perovskite solar cells since they can be made using a roll‐to‐roll printing technique and are appropriate for mass manufacturing. More significantly, flexible evolving solar cells may be created on ultrathin and light substrates to fulfill the demands of the developing flexible electronics industry and discover uses that are not possible with traditional photovoltaic technology. In any flexible device, the substrate is a backbone on which further materials rely. A flexible substrate reduces the installation and transportation charges, thereby reducing the system price and increasing power conversion efficiency. In this review, we comprehensively assess relevant materials suitable for making flexible photovoltaic devices. Several flexible substrate materials, including ultra‐thin glass, metal foils, and various types of polymer materials, have been considered. For conducting materials, transparent conducting oxides, metal nanowires/grids, carbon nanomaterials, and conducting polymers have also been comprehended. Progress on various flexible foils, fabrication and stability issues, current challenges, and solutions to those challenges of using conductive polymer substrate is endorsed and reviewed in detail. The originality of this holistic study lies in its ability to offer a thorough overview of recent advancements in flexible dye‐sensitized and perovskite solar cells on polymer substrates, which is conceivable and worthy as a roadmap for future research work.