Tm3+ doped oxy-fluoride glass-ceramics containing NaLaF4 nano-crystals

NMR investigation of the crystallization mechanism of LaF3 and NaLaF4 phases in aluminosilicate glasses

“…Some of the glasses studied in this work were doped with different quantities of Tm 2 O 3 and the location of Tm 3+ ions in the nano-crystals of the corresponding glass-ceramics was confirmed [11]. The low phonon energy environment of Tm 3+ ions enhances laser emission intensities respect to the doped parent glass.…”

Transparent Nano Crystalline Glass‐Ceramics by Interface Controlled Crystallization

“…In these studies, the formation of core/shell structures is described which form spontaneously and lead to a drastic increase in the viscosity of these shells and to the formation of stresses which decelerate further crystal growth. This has been performed for the crystallization of oxides (Fe 3 O x, quartz or spodumen) or of fluorides (CaF 2, SrF 2, BaF 2, LaF 3, or NaREF 4 ). In all these systems, the viscosity of the residual glassy phase increases during the course of nucleation and crystal growth.…”

Elaboration, Structure, and Luminescence of Eu3+‐Doped BaLuF5‐Based Transparent Glass‐Ceramics

“…Due to the much smaller size of the precipitated crystals than the wavelength of visible (VIS) and near infrared (NIR) light as well as the matching of refractive index between nanocrystals and glassy host, glass‐ceramics present high transmittance in the VIS‐NIR region. Among various glass‐ceramics systems, fluoride based transparent oxyfluoride glass‐ceramics are considered as promising candidates aimed at the fact that they combine both advantages of superior chemical and mechanical stability of oxide glasses and low phonon energy environment of fluoride nanocrytals . In such materials, REI enrich preferentially in the precipitated fluoride nanocrystals and exhibit an excellent luminescent behavior with enhanced emission efficiency and longer lifetimes due to the reduced nonradiative relaxation.…”