| Titre : |
Size selectivity during dip coating of sol–gel silica-based antireflective coatings and its effect on the porosity of the coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Yair Tamar, Auteur ; Matan Kahanov, Auteur ; Carynelisa Haspel, Auteur ; Yoel Sasson, Auteur |
| Année de publication : |
2016 |
| Article en page(s) : |
p. 1103-1113 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Couches minces
Dip-coating
Revêtement antireflet:Peinture antireflet
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
Sol-gel, Procédé
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The behavior of the particle size distribution (PSD) during the preparation of sol–gel silica-based antireflective coatings (ARCs) by dip coating was examined. It was found that the PSD after deposition differs dramatically from the PSD in the sol–gel suspensions, with the PSD after deposition being much narrower. A correlation between a decrease in the porosity of the ARC and an increase in the dispersity of the deposited PSD was also found. Hence, controlling the PSD during deposition has a direct effect on the resulting porosity and thus on the reflectance of an ARC. It was found that the temperature and deposition speed during dip coating, respectively, have very little effect on the deposited PSD. It was found that the PSD of the sol–gel suspension control the content of the deposited PSD, but does not change the range of sizes deposited. Finally, it was found that random-uniform particle placement results in elongated sequences of four or more particles, which supports our previous conclusion that the linear permittivity mixing rule is most appropriate for Stöber-based ARCs. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Instruments - Procedures - Calculations and computation
- RESULTS AND DISCUSSION : A suspension with uni-modal PSD - A suspension with a bi-modal PSD - The effect of the suspension PSD on the effective RI and reflectance |
| DOI : |
10.1007/s11998-016-9825-1 |
| En ligne : |
http://link.springer.com/content/pdf/10.1007%2Fs11998-016-9825-1.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27268 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 6 (11/2016) . - p. 1103-1113
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Size selectivity during dip coating of sol–gel silica-based antireflective coatings and its effect on the porosity of the coatings in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 6 (11/2016)
