The influence of the compounds dissociation in melting point on melt supercooling

Мешалкин, А. Б.; Каплун, А. Б.; Kidyarov, B. I.

doi:10.1016/j.jcrysgro.2007.11.195

Cited by 1 publication

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References 5 publications

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“… r evap parameters computed for some representative glass‐forming substances (LB2: Li 2 O·2B 2 O 3 , LG2: Li 2 O·2GeO 2 , LT2: Li 2 O·2TeO 2 , NB2: Na 2 O·2B 2 O 3 , NG2: Na 2 O·2GeO 2 , NT2: Na 2 O·2TeO 2 , YAG: 3Y 2 O 3 ·5Al 2 O 3 ); vertical arrows are a graphical representation of Δ evap . Melting temperatures were obtained from previous literature 73–75,79–81,95–100 . See also Figure 3A for a complete symbol legend.…”

Section: Discussionmentioning

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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Section: Discussionmentioning

confidence: 99%