Glass Shaping

Laniel, Romain; Hubert, Mathieu; Miroir, Mathieu; Brient, A.

doi:10.1007/978-3-319-93728-1_36

Cited by 5 publications

(4 citation statements)

References 48 publications

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“…The viscosity of melts is the most important parameter during the glass-forming process. 199 A suitable range of viscosity depends on the glass-forming technology used. The main characteristic temperatures are assigned based on the viscosity: (1) Melting point (10 1 Pa s).…”

Section: Crystal Melting and Glass Formationmentioning

confidence: 99%

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Metal–Organic Network-Forming Glasses

2022

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The crystal−liquid−glass phase transition of coordination polymers (CPs) and metal−organic frameworks (MOFs) offers attractive opportunities as a new class of amorphous materials. Unlike conventional glasses, coordination chemistry allows the utilization of rational design concepts to fine-tune the desired properties. Although the glassy state has been rare in CPs/MOFs, it exhibits diverse advantages complementary to their crystalline counterparts, including improved mass transport, optical properties, mechanical properties, and the ability to form grain-boundary-free monoliths. This Review discusses the current achievements in improving the understanding of anomalous phase transitions in CPs/MOFs. We elaborate on the criteria for classifying CP/MOF glasses and comprehensively discuss the three common strategies employed to obtain a glassy state. We include all CP/MOF glass research progress since its inception, discuss the current challenges, and express our perspective on future research directions. CONTENTS 7.5. Thermal Conductivity 4194 8. Outlook and Conclusion 4194 8.1. Crystal Melting and Glass Formation 4195 8.2. Alternative Routes to Obtain a Glassy State 4195 8.3. Structural Identification 4196 8.4. Application 4196 Associated Content 4196 Special Issue Paper 4196 Author Information 4196 Corresponding Author 4196 Author 4197 Notes 4197 Biographies 4197 Acknowledgments 4197 Abbreviations 4197 References 4198

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Section: Crystal Melting and Glass Formationmentioning

confidence: 99%

“…The behavior is primarily correlated with two parameters: viscosity above T m and temperature windows between T m and T d . The viscosity of melts is the most important parameter during the glass-forming process . A suitable range of viscosity depends on the glass-forming technology used.…”

Section: Outlook and Conclusionmentioning

confidence: 99%

Metal–Organic Network-Forming Glasses

2022

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“…These features are essential for the widespread cost‐effective use of glass for the production of, for instance, hollow containers and flat window panes 1 . Depending on the desired final geometry, numerous shaping methods have been developed by the glass industry, from simple casting to glass blowing and float processing 2 . Specifically concerning the manufacturing of spherical glass beads, which have found historical applications in jewelry 3 and, more recently, as optical lenses and retro‐reflective paint additives, 4 several manufacturing routes have been reported 5–7 ; however, such procedures exhibit only limited compositional versatility and size selectivity.…”

Section: Introductionmentioning

confidence: 99%

Key melt properties for controlled synthesis of glass beads by aerodynamic levitation coupled to laser heating

Baborák

Yembele

Vařák

et al. 2023

Int J of Appl Glass Sci

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Binary alkali silicate glasses were synthesized as beads by aerodynamic levitation coupled to laser heating to test the applicability of the method to this compositional range. While bubble-free lithium disilicate beads could be easily obtained, sodium and potassium silicates proved more challenging to melt without significant alkali evaporation: the final samples contained bubbles and exhibited compositional drifts compared to the starting stoichiometry, especially at high SiO 2 content. The risk of volatilization from the melts was evaluated empirically: the volatility of each oxide component scaled to the ratio between its melting temperature T m and the T m of the target composition (r evap ), while the difference between such ratios (Δ evap ) provided a qualitative estimation of the risk of differential evaporation. The formulated approach enables to evaluate the suitability of aerodynamic levitation synthesis for a given target glass composition: while low melting temperature and low liquidus viscosity (η < 10 0 Pa s) represent the primary optimal conditions, more viscous materials can still be prepared without major compositional drifts using a more careful melting procedure, especially if r evap and Δ evap are minimized.

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“…Moreover, they act as precursors for the synthesis of glass-ceramics, obtained by controlled crystallization [2] and exhibiting unique advantageous properties such as zero thermal expansion, transparency, extremely high toughness and/or good machinability depending on the chosen compositional systems [3,4]. Irrespectively of the selected application, a precise knowledge of the temperature-dependent viscosity η(T) of glass-forming melts is key to achieve successful homogenization, fining and shaping of the final product [5,6].…”

Section: Introductionmentioning

confidence: 99%

Non-stoichiometric crystal nucleation in a spodumene glass containing TiO2 as seed former: Effects on the viscosity of the residual melt

Zandonà,

Scarani,

Löschmann

et al. 2023

Journal of Non-Crystalline Solids

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Glass Shaping

Cited by 5 publications

References 48 publications

Metal–Organic Network-Forming Glasses

Metal–Organic Network-Forming Glasses

Key melt properties for controlled synthesis of glass beads by aerodynamic levitation coupled to laser heating

Non-stoichiometric crystal nucleation in a spodumene glass containing TiO2 as seed former: Effects on the viscosity of the residual melt

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