Fabrication of gold ruby glasses using solar panel glass cullet

Gold ruby glasses were fabricated by melt quenching and subsequent isothermal treatment using solar panel glass cullet with B2O3 and Au. In this study, the effect of B2O3 addition on the melt viscosity was evaluated. Moreover, the B(2)O(3 )concentration and melting conditions were optimized to prepare homogeneous glass samples at laboratory scale. As a raw material of gold, Au2O3 powder with 0.014 mass % was added into aqua regia via a known dissolution process. The Sb2O3 constituent (similar to 0.2 mol %) contained in the glass cutlet probably played the role of a reducing agent for gold. Homogeneous red glasses were obtained through isothermal treatments at 600-620 degrees C for ten days. (C) 2021 The Ceramic Society of Japan. All rights reserved.