Study of the principles of fluorine fixation in melts and glass with polar groups

Kiprianov, A. A.; Ponomarev, I. A.

doi:10.1134/s108765961502008x

Cited by 2 publications

(1 citation statement)

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“…Simultaneously, the fluorine percentage is significantly reduced. Previous studies have shown that the loss of fluorine from alkali silicate melts containing fluorine additives is likely to occur simultaneously in the form of both alkali metal fluoride (KF) and silicon tetrafluoride (SiF 4 ) . A detailed explanation of the change in chemical composition during melting of these glasses can be found in a previous work …”

Section: Resultsmentioning

confidence: 99%

Crystal Growth of F‐Phlogopite from Glasses of the SiO₂–Al₂O₃–MgO–K₂O–F System

2015

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A study on the devitrification of fluorophyllosilicate glass precursors is presented. The research has been focused on the early stages of the crystallization process and shows the variation in the crystallization mechanism with increasing the fluorine content. The devitrification process has been studied by means of differential scanning calorimetry (DSC) and fieldemission scanning electron microscopy (FESEM). These complementary techniques established that both surface (heterogeneous nucleation) and volume (internal homogeneous nucleation) mechanisms are present in the crystallization process of fluorophlogopite-based glasses, the latter being predominant. By increasing the percentage of fluorine in the parent glass, a variation in the location of the first crystals developed from the internal volume of the glass toward the external surface was observed. Such an alteration in the crystallization mechanism was also checked by examining the microstructure of crystallized samples prepared under short-time treatments.

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Section: Resultsmentioning

confidence: 99%