Abstract
In this research, effects of soaking time in melting glass process on red color development have been investigated. The red glasses were prepared from gold nanoparticles (AuNPs) with compositions of 70.475SiO2 : 11Na2O : 9CaO : 9K2O : 0.005SeO2 : 0.5SnO2 : 0.02AuNPs % by weight and vary soaking time at 1 to 5 hours. The glasses were melted the normal melt-quench technique. The color of glasses were measured by uv-visible spectrophotometer in the wavelength range 300-900 nm and color coordinate in CIEL*a*b* system. The result found that, the glasses sample with 1 and 2 hours of soaking time are shown purple color. At 3, 4 and 5 hours of soaking time are shown red color. The results reflecting that the particle size of gold particle in glass matrices at 3, 4 and 5 hours are smaller than 1 and 2 hours of soaking time.
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