Impact of Ag2O Content on the Optical and Spectroscopic Properties of Fluoro-Phosphate Glasses

Abstract

Glasses with the system (84.60-x) NaPO3-5 ZnO-(9.40-x) NaF-x Ag2O-1 Er2O3, (x = 0, 2, 4, and 6) (mol%) were synthesized by the conventional melt-quenching method. The impact of the addition of Ag2O on the physical, thermal, structural, and optical properties of the glasses is discussed. The Judd-Oflet analysis was used to evaluate the radiative properties of the emission transitions of the glasses. The enhancement of luminescence properties due to Ag2O is discussed in terms of consequent changes in the local electromagnetic field, symmetry, and the ligand field around the Er3+ ion. The heat treatment of the glass was performed in order to precipitate Ag nanoparticles (NPs), which form as a layer at the surface of the heat-treated glasses as confirmed using scanning electron microscopy (SEM). The Ag NPs were found to increase the intensity of the emission at 1.5 µm.

Influence of barium substitution on the physical, thermal, optical and luminescence properties of Sm3+-doped metaphosphate glasses for reddish orange light applications

“… 28 The band at approximately 1250 cm −1 is associated with the asymmetric stretching vibration of P–O–P bonds, ν as (P–O–P). 26 Between 950 and 1030 cm −1 , multiple shoulders are detected and they were assigned to v s (PO 3 2− ) in Q 1 units. 29 According to the spectral data, an increase in the BaO content from 20 to 30 mol% results in a higher proportion of Q 2 units at the expense of Q 1 units.…”

“…Within the spectra, a prominent band appearing around 890 cm −1 , indicating the asymmetric stretching vibration of P-O bonds, n as (P-O-P). 26,27 Around 1075 cm −1 , another signicant band arises, though the specic vibrational mode of v s (P-O-P) of both Q 2 and Q 1 units. 28 The band at approximately 1250 cm −1 is associated with the asymmetric stretching vibration of P-O-P bonds, n as (P-O-P).…”

“…In agreement with FTIR analyses, these factors contribute to the hindrance of light waves passing through the glass samples. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] The relationship between the refractive index of the glass and its density variation with BaO content is governed by the Lorentz-Lorentz equation. 31 This equation establishes a direct correlation between the refractive index and density of the glass.…”

Impact of Ag2O on the mechanical and shielding features of ZnO- Er2O3-TeO2 glasses

“…Also, it is reported that TeO 2 glasses have relatively high density and thus possess a good attenuation ability against gamma radiation [20][21][22]. During the preparation process of the TeO 2 -based glasses, some glasses modi ers such as ZnO and Ag 2 O are used to enhance their optical features and radiation attenuation competences [23,24]. Introducing the Er 2 O 3 ions enhances the chemical durability of glass as well as the radiation shielding features.…”