Effects of composition and phase relations on mechanical properties and crystallization of silicate glasses

Abstract

Many technological properties of glasses are intrinsically related to their chemical compositions and many studies have previously reported significant variations in mechanical and physical properties of glasses due to compositional modifications. For example, studies are available which link the indentation cracking behavior of glasses to Poisson's ratio,

Dynamic high‐temperature crystallization and processing properties of industrial soda–lime–silica glasses

“…The delta between gob and liquidus temperatures (T 3G-T L ) provides valuable information in assessing the practicality of working with reformulated or newly designed glass compositions. 11 Positive sign of delta can be related to better workability properties as such positive variation in delta reduces the likelihood of devitrification product formation not only in forehearths but also at the melting tank bottom where the glass melt temperatures can be approximately 200 • C lower than the furnace hot spot. 36 On the other hand, the delta between gob and liquidus temperature for T-and C-group glasses (Table 3)-that is, ∼251 • C and 188 • C for T 2 and C 1 glass, respectively-appears to be very conservative and high, and this might enable technologists to further optimize and reduce melting and conditioning tempera-tures to reduce energy consumption, CO 2 footprint, and refractory corrosion rates.…”

“…The multiple regression models (see Equations ( 6) and ( 7)), which were developed by collating the liquidus temperatures of T, C-group, and literature glasses 7,11 (Table 4), demonstrate that SiO 2 , Al 2 O 3 , MgO, and CaO are the main oxides governing liquidus temperature of soda-lime-silica glasses, but the effect of CaO and MgO appears to be more pronounced than that of SiO 2 and Al 2 O 3 in increasing the liquidus temperatures. The first coefficients or the constant terms in Equations ( 6) and ( 7) are the y-intercepts, and they are the output of the multiple regression analysis.…”

“…It was previously shown that Fluegel's liquidus temperature model 16 provides a good fit to the experimental liquidus temperature data of various soda-lime-silica glasses measured by gradient boat method. 11 Here commercial container and float glass compositions from the literature were used to assess the performance of our own developed TL(1) and TL(2) models, as well as the Fluegel, Karlsson, and Cuartas liquidus temperature models. Note that liquidus temperature can be influenced by the experimental procedure in practice, and each literature float glass obtained from the study by Beerkens and Conradt 15 (F 1 , F 2 , and F 3 ) has different liquidus temperature values measured by different techniques.…”

“…Liquidus temperature is an important glass technology parameter, and it has a significant effect on the workability of commercial soda-lime-silica glasses. 9,10 Kilinc et al 11 investigated how phase relations impact the liquidus temperature and crystallization rate of silicate glasses at a temperature that was 30 • C lower than their measured liquidus temperatures. Their findings revealed that while the extent of crystallization in the glass melts may be relatively small when considering the diverse compositional modifications, there are still notable and statistically significant instances of crystal growth observed for glass melts falling within the devitrite and tridymite primary phase fields.…”

MATHEMATICAL SIMULATION OF CONTACT INTERACTION OF A PANDA TYPE OPTICAL FIBER WITH ALUMINUM HALF-SPACE WITH DIFFERENT CHARACTER OF ELEMENTS conjugation

“…Pandaоптическое волокно, которое сохраняет поляризацию вводимого излучения, является одним из самых распространенных и широко исполь-зуемых волноводов [17][18][19]. При этом можно отметить достаточно обширный спектр исследований волокон типа Panda: геометрия [20], свойства кварцевых стекол [21], технологические процессы [22] и т.д. Часто при моделировании волоконно-оптических волноводов используют упрощенные модели [23][24][25][26][27]: без учета защитно-упрочняющих покрытий (ЗУП), конструктивных элементов, с канонической упрощенной геометрией, а также без учета характера сопряжения элементов.…”