Structural Features and Synthesis of CeO₂-Doped Boroaluminosilicate Oxyfluoride Transparent Glass Ceramics

Abstract

This study investigated the effects of CeO2on structure and synthesis of boroaluminosilicate transparent glass ceramics containing CaF2nanocrystals prepared through isothermal crystallization of the melt-quenched glasses with composition 54SiO2–10B2O3–13Al2O3–14Na2O–3ZnO–2Li2O–4CaF2doped with 0–1.2 mol% CeO2. CeO2in polyvalent states acting as network modifier leads to disruption of the silicate network and the conversion of [BO3] to [BO4] generating the nonlinear variations in crystallization, and thermodynamic and optical features. Glass transition temperature and the crystallization temperature decrease firstly and then increase with the increase of CeO2content. Correspondingly, the size of CaF2nanoscale crystals and the absorption coefficient of the glass ceramics are found to pass through a maximum and then decrease with increasing CeO2addition. Increasing CeO2concentration and elevating treating temperature lead to red-shift of absorption edge and transparency deterioration of glass ceramics.

Characterization of Ruby Color in Some Special Glass Compositions and Their Corresponding Glass–Ceramic Derivatives

“…The addition of MgF 2 gives an effective role in the nucleation process leading to the formation of two different phases of borate crystalline species. 27,30,[34][35][36] glass-ceramic derivatives show a characteristic decrease compared to those of their parent glasses due to the disorder decrease in the glass network as a result of transition metal ion additions. The color coordinates indicated noticeable deep red color for chromium dopant and red wine for selenium and manganese dopants.…”

Preparation and Biocompatibility of Poly Methyl Methacrylate (PMMA)-Mesoporous Bioactive Glass (MBG) Composite Scaffolds

“…The absorption bands located at 1074 cm −1 can be ascribed to Si–O–Si asymmetric stretching vibration and are due to the vibrations of the non-bridging Si–O bonds in the structural units Q3 which are tetrahedral [SiO4], with one non-bridging oxygen atom and three bridging oxygen atoms. It can be noticed that the band located at 1074 cm −1 slightly intensifies with the increase of cerium concentration, suggesting the depolymerization of Si–O network to units with less bridging oxygen and cerium acting as a network modifier in glass [ 22 , 23 ]. The bands situated at 750 and 435 cm −1 are due to Si–O–Si symmetric stretching of bridging oxygen and Si–O bending vibration, respectively.…”

Luminescence Properties of Cerium Doped Iron Calcium Boroaluminate Glass

“…Thus, it is believed that such combination can improve the efficiency of glass based solar cells. Over the years, cerium doped glasses are customarily used in various applications such as biosensor, solid oxide fuels cells, photovoltaic devices, UV blockers, polishing materials, corrosion protection and tunable solid state lasers [12,13].…”