Fabrication of gold ruby glasses using solar panel glass cullet

抄録

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 B₂O₃ 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 (∼0.2 mol %) contained in the glass cullet probably played the role of a reducing agent for gold. Homogeneous red glasses were obtained through isothermal treatments at 600–620 °C for ten days.