Preparation and characterization of a novel luminescence nano-sillenite (Bi12SiO20) glass ceramic within Bi2O3–ZnO–SiO2 system

Abstract Bismuth silicate with sillenite structure (Bi 12 SiO 20 ) nanophase was prepared via melt–quenching technique in the Bi 2 O 3 –ZnO–SiO glass system. The effect of replacement ZnO by studied. Their thermal behavior showed change transition temperature (Tg) from 577 °C -free to 438 ZnO-free glass. In addition, crystallization temperatures were not only changed two one peak, but also decreased 927 476 same order. According heat treatment regimes, willemite, sillenite, tetragonal , cubic and traces crystallized different ratios depending on composition temperature. Sillenite enhanced increase and/or additions. Heat at 650 °C/10 h revealed best regime, where higher degree achieved. microstructure 700 ℃/30 min nano-scale oriented parallel rod crystals hexagonal making their end, whereas clusters irregular nano-size appeared h. Transmission spectra glasses UV–Vis–midIR region increased addition reaching 74% 100B. Photoluminescence properties both corresponding glass–ceramics luminescence nature since blue green colors clearly appeared. Calculation optical bandgap (E opt 3.2–2.19 eV increasing ; these values are located semiconducting range. samples can be utilized electro-optical instruments, high transmission mid-IR nominate it for IR transmitting windows.