Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 537, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2020.119987
Keywords
Laser; Ablation; LASiS; Sol-gel; Red glass
Funding
- FCT/MEC [3485, POCI-01-0145-FEDER-007679, UID/CTM/50011/2013]
- FEDER under the PT2020 Partnership Agreement
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Currently, most of the red colored glasses are still produced using cadmium sulfoselenide, despite its high toxicity. Alternative solutions, more environmentally friendly, have been sought, most of them going through the use of gold or copper nanoparticle, the color being obtained by striking. This work presents a new methodology for production of a red colored glass by the incorporation of gold nanoparticles in the melt, trying to take advantage of an amorphous silica layer involving the nanoparticles. Gold nanoparticles (AuNP) were produced by laser ablation synthesis in solution (LASiS), using a solution of tetra-ethyl orthosilicate (TEOS) and isopropanol (IPA). A xerogel was prepared using the TEOS:IPA:AuNp suspension, mixed with a alkaline-earth aluminosilicate colorless glass and melted at 1350 degrees C producing a glass with an intense and homogeneous ruby red color without the need of a striking stage.
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