Research on effect of ZrO2 on thermal stability and structure of Ga/In based fluoride glasses

Abstract

A systematic investigation on glass formation in the 20GaF 3 -15InF 3 -20CdF 2 -15ZnF 2 -(20-x)PbF 2 -10SnF 2 -xZrO 2 (xZ-GICZPS) system (x = 0, 2, 4, 6, 8 in mol.%) was carried out. These glasses were characterized by differential scanning calorimetry (DSC), infrared (IR) spectra and Raman spectra. The DSC results show that the thermal stability is affected by PbF 2 and ZrO 2 contents. With increasing ZrO 2 content, the thermal stability is improved at first and then reduced, which is proved by thermal stability factors ΔT and S determined by DSC. As a result, the 20GaF 3 -15InF 3 -20CdF 2 -15ZnF 2 -14PbF 2 -10SnF 2 -6ZrO 2 glass shows the largest parameters ΔT and S, processing the most excellent thermal stability. Analyses of IR spectra reveal that glasses have broad transparency range in IR region. According to Raman spectra, the glass network structures are basically composed of mixed [(In, Ga)F 6 ] and In[O, F] 6 units and ZrO 2 mainly acts as network modifier in this system.

Optical, physical and structural studies of vanadium doped P2O5–BaO–Li2O glasses

“…Generally, the difference between crystallization temperature (T c ) and glass transition temperature (T g ), i.e., (T c ÀT g ) gives a measure of thermal stability of a supercooled liquid (glass). The larger value of S, the stronger is the inhibition to nucleation and crystallization processes, and consequently, the better thermal stability of supercooled liquids (glass) [19]. T c could not be identified in the present work in all samples; due to limitation DSC operating system as maximum temperature that could be attained is 550 1C.…”

An Upconversion Niobium Pentoxide Bulk Glass Codoped with Er3+/Yb3+ Fabricated by Aerodynamic Levitation Method

“…A restructuring network caused by ZrO 2 addition can hardly nucleate and crystalline during the cooling process. On the other hand, it coincides with the confusion principle that the glass stability increases as the number of the glass components increases . Nevertheless, the obtained kinetic windows for all presented glasses are lower than 50 °C, which are quite lower than Δ T of most traditional oxide glasses.…”

Characterization and structural studies of lithium doped lead zinc phosphate glass system

“…2 and 3. Generally, the difference between crystallization temperature (T c ) and transition temperature (T g ), gives a measure of stability of a supercooled liquid (glass) i.e., stability factor S. The larger value of S, the stronger is the inhibition to nucleation and crystallization processes, and consequently, the better thermal stability of supercooled liquids (glass) [27]. As can be seen in Fig.…”