Glass Technology-European Journal of Glass Science and Technology Part a最新文献

{"title":"Evaluation principle in respect of the batch melting zone of a glass melt furnace","authors":"Sven Wiltzsch","doi":"10.13036/17533546.58.4.008","DOIUrl":"https://doi.org/10.13036/17533546.58.4.008","url":null,"abstract":"","PeriodicalId":55090,"journal":{"name":"Glass Technology-European Journal of Glass Science and Technology Part a","volume":"3 1","pages":"105-115"},"PeriodicalIF":0.3,"publicationDate":"2017-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90536655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and microstructure of boron containing Mg-fluor-richterite (Na2Mg6Si8–xBxO22F2) based glass-ceramics","authors":"E. Hamzawy, S. Eldera, C. Rüssel","doi":"10.13036/17533546.58.3.025","DOIUrl":"https://doi.org/10.13036/17533546.58.3.025","url":null,"abstract":"","PeriodicalId":55090,"journal":{"name":"Glass Technology-European Journal of Glass Science and Technology Part a","volume":"41 1","pages":"73-78"},"PeriodicalIF":0.3,"publicationDate":"2017-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91035476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Glass melting using concentrated solar thermal energy","authors":"S. Ahmad, C. Wieckert, R. Hand","doi":"10.13036/17533546.58.2.012","DOIUrl":"https://doi.org/10.13036/17533546.58.2.012","url":null,"abstract":"Glass melting using concentrated solar thermal radiation is demonstrated on the kilogramme scale using a high flux solar simulator (HFSS). The melting process involved a novel furnace design utilising a downward orientated concentrated solar beam coupled with back-up integrated electrical heating elements, which provided secondary heating to maintain a melt when the HFSS beam was unavailable (i.e. equivalent to cloudy conditions or at night). With 5·26 kW radiative power from the HFSS input to the furnace through a 6 cm diameter aperture, pelleted soda–lime–silica batches were melted. Repeated additions of ∼300 g of batch pellets were made to the melt with each ∼300 g addition requiring ∼15 min for the reactions to complete and the melt temperature to recover. This is equivalent to a glass batch melting thermal efficiency of 16% at a solar concentration ratio of 1857 suns. The areas of land required for the heliostat field and, for the electrical backup elements, photovoltaic field are shown to be significant for even moderate daily glass production tonnages.","PeriodicalId":55090,"journal":{"name":"Glass Technology-European Journal of Glass Science and Technology Part a","volume":"123 1","pages":"41-48"},"PeriodicalIF":0.3,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85689742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE INTERRELATIONSHIP AMONG THE COMPONENTS OF STUDENTS’ INTERNET INSIGHT AS AN ACADEMIC RESOURCE TOOL IN KENYAN UNIVERSITIES","authors":"Musamia A Obulinji, R. Korir, Dr.Njeri Kiaritha, S. Mulambula","doi":"10.47672/ejt.894","DOIUrl":"https://doi.org/10.47672/ejt.894","url":null,"abstract":"Purpose: The aim of this paper was to determine the interrelationship among the components of students’ internet insight as an academic resource tool in universities based in Kenya. \u0000Methodology: The study was conducted in Moi University and Daystar University. The study was based on the Social learning theory by Bandura focusing on internet self-efficacy and supplemented by Technology acceptance model by Davies. Quantitative research approach was undertaken. An ex post facto research survey design was adopted. The researcher used a representative sample of 435 (Moi University) and 175 (Daystar University)adding up to 610 Third year student teachers of the academic year 2015/2016 drawn from School of Education in the two universities. Stratified sampling was used to categorize students by gender from each stratum; participants were chosen randomly. Questionnaires were used as instruments of data collection. Content validity was established by use of expert judgment in the school of education. Test re-test method was applied to check if the instruments that collected data were reliable. Descriptive and inferential statistics were applied to analyze data. In descriptive statistics data frequencies, percentages and mean was used. Analysis of variance (ANOVA), Chi square and Post hoc tests were used to test the hypotheses. \u0000Results: The findings indicated that more participants concurred with almost all accounts on internet knowledge, self-efficacy, perceived internet usefulness and perceived internet ease of use. \u0000Unique contribution to theory, practice and policy: The results of the paper are useful in designing educational programs in Kenyan institutions of higher learning and also, present a platform to close the gap of knowledge in digital divide field which is used later in technology acceptance studies.","PeriodicalId":55090,"journal":{"name":"Glass Technology-European Journal of Glass Science and Technology Part a","volume":"5 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2017-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88845441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Glass wool layer formation in the collecting chamber","authors":"Boris Kraševec, B. Bizjan, B. Širok","doi":"10.13036/17533546.58.1.002","DOIUrl":"https://doi.org/10.13036/17533546.58.1.002","url":null,"abstract":"","PeriodicalId":55090,"journal":{"name":"Glass Technology-European Journal of Glass Science and Technology Part a","volume":"96 1","pages":"1-7"},"PeriodicalIF":0.3,"publicationDate":"2017-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79468223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental mixing of natron and plant ash style glass: implications for ancient glass recycling","authors":"R. Scott, B. Neyt, Dieter Brems, K. Eekelers, Andrew J. Shortland, P. Degryse","doi":"10.13036/17533546.58.1.011","DOIUrl":"https://doi.org/10.13036/17533546.58.1.011","url":null,"abstract":"","PeriodicalId":55090,"journal":{"name":"Glass Technology-European Journal of Glass Science and Technology Part a","volume":"94 1","pages":"8-16"},"PeriodicalIF":0.3,"publicationDate":"2017-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83349829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of glass-ceramic materials from basaltic rocks and by-pass cement dust","authors":"G. Khater, M. Shehata, E. Hamzawy, M. Mahmoud","doi":"10.13036/17533546.58.1.001","DOIUrl":"https://doi.org/10.13036/17533546.58.1.001","url":null,"abstract":"Glass-ceramic is a generic name given to materials, which first melted, formed into glass and then crystallised in controlled manner to yield nonporous polycrystalline products of unexpected properties. Controlled crystallisation usually involves two stages, a nucleation stage and a crystallisation stage,(1–3) that aim to produce fine grained uniform textures consisting of small randomly oriented crystals bonded by some residual interstitial glass without voids, micro-cracks or porosity.(4,5) Glass-ceramics can have significant advantages over conventional glass or ceramic materials by combining the flexibility of formation and inspection of glass with good mechanical properties. Glassceramics are fine grained polycrystalline materials formed when glasses of suitable composition are heat treated and thus undergo controlled crystallisation,(6) and they are characterised by physical and mechanical properties such as high bending strength and hardness, good corrosion resistance and abrasion resistance. The raw materials used for the present investigations include basaltic rocks from Sinai and by-pass cement dust. Basalts are the main raw materials for iron-rich glass and glass-ceramic materials. They are composed of silica, alumina, iron oxide, calcia, magnesia as major oxides and, of lesser importance, soda, potassia, titania and manganese and phosphorus oxide as well as trace amounts of other species.(7) They are characterised by low viscosity, which enables production of polycrystalline materials by applying short production cycles at low temperatures, which is why, many researchers are keen on studying the melting and crystallisation behaviour of different igneous rocks and characterising the materials obtained.(8) The high chemical durability of natural basalts mean basalt as well as basaltic glass-ceramic materials have been developed for nuclear waste disposal.(9) For vitrification of various hazardous industrial wastes basaltic materials have many important properties and useful applications as they can increase the bending strength of tiles while preserving the physical-chemical properties required and improving sintering quality. Considering the main component of the raw materials compositions for making glass ceramic materials they can be used as heat and fire resistant materials because of their low thermal conductivities, high oxidation resistance, and high softening and melting temperatures.(10) In addition, basalt fibre has good tensile strength properties compared to other glass fibres. However basaltic fibre composites have a lower tensile fire resistance than an equivalent glass fibre laminates when exposed to the same heat flux.(11) Not only is basalt is used in road paving works and as a construction material for building blocks, but also it can be contributed in cement manufacturing where it results in a higher compressive resistance without the addition of aggregates.(12) The cement manufacturing industry is one of the Preparat","PeriodicalId":55090,"journal":{"name":"Glass Technology-European Journal of Glass Science and Technology Part a","volume":"36 1","pages":"17-25"},"PeriodicalIF":0.3,"publicationDate":"2017-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81885527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A study of refining. Part 2: Mechanisms of refining","authors":"M. Cable","doi":"10.13036/17533546.57.6.205","DOIUrl":"https://doi.org/10.13036/17533546.57.6.205","url":null,"abstract":"","PeriodicalId":55090,"journal":{"name":"Glass Technology-European Journal of Glass Science and Technology Part a","volume":"160 1","pages":"205-215"},"PeriodicalIF":0.3,"publicationDate":"2016-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73649071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A study of refining. Part 1: Measurements of the refining of a soda–lime–silica glass with and without refining agents","authors":"M. Cable","doi":"10.13036/17533546.57.6.195","DOIUrl":"https://doi.org/10.13036/17533546.57.6.195","url":null,"abstract":"","PeriodicalId":55090,"journal":{"name":"Glass Technology-European Journal of Glass Science and Technology Part a","volume":"52 1","pages":"195-204"},"PeriodicalIF":0.3,"publicationDate":"2016-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90419762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A study of refining. Part 3: The function of arsenious oxide during melting and refining","authors":"M. Cable","doi":"10.13036/17533546.57.6.216","DOIUrl":"https://doi.org/10.13036/17533546.57.6.216","url":null,"abstract":"","PeriodicalId":55090,"journal":{"name":"Glass Technology-European Journal of Glass Science and Technology Part a","volume":"25 1","pages":"216-222"},"PeriodicalIF":0.3,"publicationDate":"2016-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86154999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}