Glass formation and crystallization kinetics in a multicomponent fluoride glass

Thermal stability and crystallization behavior of TiO2 doped ZBLAN glasses

“…From the experimental data fit, the activation energy values were determined and are shown in Table 2. The sample with 2.0 mol% of TiO 2 showed lower activation energy, which is in agreement with the activation energy paradox for fluoride glasses [24,28]. This behavior was expected, since this glass has high thermal stability.…”

“…(2) and (3) are the basis for the investigation of crystallization experiments with DSC, but Eq. (2) is strictly applied to isothermal experiments [28,[32][33][34]. The nonisothermal method to study kinetics of transformation based on the Fig.…”

Study on thermophysical properties and phase evolution in Nd doped Li2O-Al2O3-SiO2 glass nucleated by multiple nucleating agents

“…The value of Avrami exponent is quite large in Nd-doped sample comparison to undoped sample. This represents that the crystallization mechanism in undoped glass is diffusion controlled grain growth, while in doped sample is interface controlled growth (the linear progression of outer crystal surface with time) [29]. Avrami parameter greater than 2 also indicates three dimensional growth of β-spodumene phase.…”

Magnetic resonance study of the crystallization behavior of InF3-based glasses doped with Cu2+, Mn2+ and Gd3+

“…Since the optical and spectroscopic properties of active glass materials are strongly affected by devitrification, the study of the crystallization phenomena of these materials is of scientific and technological importance. A considerable number of studies have addressed the problem of crystallization and devitrification in fluoride glasses, using several experimental techniques such as X-ray diffraction (XRD), differential scanning calorimetry (DSC), nuclear magnetic resonance (NMR), electron paramagnetic resonance (EPR), scanning electron microscopy, fluorescence spectroscopy, and so on [6][7][8][9][10][11]. EPR is a sensitive spectroscopic technique for the characterization of local order in a variety of solid-state systems.…”

“…Fluoroindate glasses are promising materials with potential applications as infrared optical materials. Since the development of these applications requires reduced intrinsic nucleation and crystal growth, the crystallization kinetics of the InF 3 -based glasses have been extensively studied in the last decade by isothermal and non-isothermal methods [25][26][27][28][29][30]11]. In a previous paper we reported a DSC, XRD and 19 F nuclear magnetic resonance (NMR) investigation of the crystallization and nucleation processes occurring in the fluoroindate glass 40InF 3 -20ZnF 2 -20SrF 2 -20BaF 2 .…”