Lead-free high refractive index glass using local Thai sands

• Main Authors: Pisutti Dararutana, Narin Sirikulrat
• Format: Article
• Language: English
• Published: Prince of Songkla University 2010-07-01
• Series: Songklanakarin Journal of Science and Technology (SJST)
• Subjects: lead-free; high refractive index; glass; local sand
• Online Access: http://www.rdoapp.psu.ac.th/html/sjst/journal/32-3/0125-3395-32-3-315-319.pdf

Due to harmful effects of lead in the high refractive index glass processing, the production of lead-free high refractiveindex glass by using other materials to replace lead has been studied. In this work, local sand from various sites in Thailandwas used to fabricate the lead-free high refractive index glass. Barium carbonate was used to replace lead oxide in order toreduce the amount of lead in glass. Results from the experiments found that the local sands and the processes for makingglass were satisfactory. The refractive index of greater than 1.60 was found in the glass specimen prepared from a concentrationof barium carbonate of more than 30 weight-%.