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An analysis of the effects of europium oxide (Eu2O3) on the shielding, dielectric, and structural properties of zinc lithium borate glasses was carried out. A rise in the amount of Eu2O3 in glasses from 0.0 to 1.0 mol% results in an improvement in density from 3.086 to 3.2176 g cm−3. FTIR analyses of our recently developed glasses revealed the production of functional groups and units, including bridging BO4 and non-bridging BO3. Bridging BO4 rose at low concentrations of europium oxide and returning to BO3 at high concentrations of europium oxide. The dielectric constant of all the glasses loaded with various ratios of Eu2O3 mol% sharply decreased as frequency rose in the low-frequency range. As the Eu2O3 level increased to 0.25 mol%, the dielectric constant value first decreased, suggesting an improvement in BO4 and then improved at increasing concentrations. For each glass that was examined, the indicated tan δ showed a relaxation peak at approximately 5 kHz. The lowest tan δ was found at a level of 0.25 mol% Eu2O3. The specimen of glass altered with 0.25 Eu is a desirable choice for packing materials because of its smallest tan δ and dielectric constant. The gamma-ray exposure buildup and energy absorption factors parameters of that oxide glass system in energy region of 0.015–15 MeV up to depths of penetration of 40 mfp have been calculated by using Photon Shielding and Dosimetry (PSD) software. It has been demonstrated that Zeq values vary on photon energy. [ABSTRACT FROM AUTHOR]

In this study, the role of TiO2 on the physica, and optical properties as well as the γ-ray protection features of a set of six glass samples with the chemical formula (65-X)B2O3–15BaO–5Bi2O3–15ZnO–XTiO2, where X = 0–10 mol% in the step of 2% have been investigated. The density (ρ) increased gradually from 3.70 to 3.93 g/cm3 and the molar volume (Vm) reduced from 27.71 to 26.72 cm3/mol as the TiO2 content increased from 0 to 10 mol%. By the inclusion of TiO2 in the glass networks, some absorption bands in the ultraviolet and visible regions are formed. Values of the indirect optical band gaps (Eg) were 2.550, 2.510, 2.470, 2.370, 2.270, and 2.180 eV for Ti-0.0, Ti-2.0, Ti-4.0, Ti-6.0, Ti-8.0, and Ti-10.0 glasses, respectively. The linear refractive index (n0) calculated values varied from 2.515 to 2.631. The linear-attenuation coefficient ( μ) followed the order: Ti-0.0 < Ti-2.0 < Ti-4.0 < Ti-6.0 < Ti-8.0 < Ti-10.0. The sample coded as Ti-10.0 glass sample (highest content of TiO2) has the lowest half (HVL) and tenth (TVL) value layer. Within the investigated energy range of within the range: 51.590–19.480, 50.676–19.722, 50.696–19.833, 50.271–20.012, 49.860–20.193, and 49.460–20.376 for the prepared samples Ti-0.0, Ti-2.0, Ti-4.0, Ti-6.0, Ti-8.0, and Ti-10.0 glasses, respectively. Results confirmed that the suggested titanium bismo-borate glasses can be used in the optical field and as alternative materials for radiation shielding applications. [ABSTRACT FROM AUTHOR]

In the present article, samples of erbium (Er)-doped bismo-borate glasses have been fabricated with general chemical compositions: 70B2O3–10CaO–10Li2O−(10-x)Bi2O3− xEr2O3: 0 (Er-0.0) ≤ x ≤ 1 (Er-1.0) mol% using the conventional melt-quench process. The impact of Er3+ ions on the structure and optical (linear and nonlinear) characteristics of Er-0.0/Er-1.0 glass blocks have been investigated. XRD measurements showed the lack in crystallinity of the prepared samples. In the range of UV-Vis measurements, there are absorption bands attributed to the electronic transitions (4f−4f) of Er3+ ions. The absorption bands seen at wavelengths of approximately 366, 379, 409, 452, 490, 523, 545, 653, 797, and 978 nm are associated with electronic transitions from the ground state, 4I15/2, to several excited states, namely 4G9/2, 2G11/2, 2H9/2, 4F5/2, 4F7/2, 2H11/2, 4S3/2, 4F9/2, 4I9/2, and 4I11/2, respectively. The optical band gap (Eg) values ranged from 2.61 to 3.11 eV for Er0.0 to Er1.0 glass samples, respectively. Values of linear refractive index (n0) ranged from 2.498 to 2.374. Values of the nonlinear refractive index varied from 7.76 to 4.99, while the third order non-linear optical susceptibility (χ(3)) values ranged from 5.14 to 3.14 for Er0.0 to Er1.0 glasses, respectively. Therefore, the suggested glasses can be used in several optical applications such as opto-electronic devices. [ABSTRACT FROM AUTHOR]

The influence of nickel-oxide (NiO) addition on the structural, optical, physical properties, and dielectric spectroscopy of lead-borated glass blocks of the chemical form: (70-x)B2O3-25Na2O-5PbO-xNiO: x = 0 (Ni-0.0)-2.5 (Ni-2.5) molar percentage was tested experimentally using various methods. X-ray diffraction measurements confirmed the amorphous character of prepared Ni-glasses. Density increased gradually from 2.5981 to 2.7568 g cm−3, whereas molar-volume declined from 29.0131 to 28.0202 cm3 mol−1 as Ni2+ ions-contenting samples improved from 0.0 to 2.5 mol% in glasses network. In the absorption UV-region, optical-gap energy changed between 2.94 and 2.48 eV. In absorption within Vis-region, the intensity of the absorbed band enhanced gradually with red-shift in their positions as Ni2+ ions content increased. In the absorption NIR-region, an increase in the IR absorption bands was observed and confirmed the enhanced heat-absorption capacity of the investigated glasses as their NiO content increased. Dielectric spectroscopy at frequencies ranging from 50 Hz to 5 MHz of (70-x)B2O3-25Na2O-5PbO-xNiO: x = 0, 0.5, 1.0, 1.5, 2.0, and 2.5 mol% glasses are carried out to determine the impact of nickel doping on dielectric spectroscopy items. Nickel doping gradually increased the dielectric constant. At high frequencies, the transport rate among nearby conductive sites is increased while the shifting length of the charges is greatly reduced which leads to higher conductivity. [ABSTRACT FROM AUTHOR]

This study investigates the synthesis, physical, vibrational, optical, and dielectric characteristics of bismuth-borate barium glasses doped with chromium, with the aim of exploring their potential for use in optical applications. The chemical formula of the proposed glasses was (70-x)B2O3 − 10Bi2O3 − 20BaO − xCrO3: x = 0 (BBBCr0.0) − 0.5 (BBBCr0.5) mol%. The structure nature was examined. The physical features, FTIR spectroscopy, and linear/nonlinear optical properties have been investigated. Based on the XRD measurements, the prepared glasses were amorphous in nature. The density (ρ) of the glasses slightly decreased, while the molar volume (Vm) increased with increasing CrO3 content in the glass network. The percentage fraction of BO4 (N4) gradually increased at the expense of the percentage fraction of BO3 (N3) as the chromium content increased up to 0.2 mol%. However, for concentrations of chromium over 0.2 mol%, a reverse transformation from BO4 to BO3 was detected. The optical energy bands (Eg) changed from 3.07 to 1.41 eV, whereas the linear refractive index (n0) changed from 2.38 to 2.98 for BBBCr-glasses. The metallization criterion (M) values ranged from 0.392 to 0.265, indicating that the glasses have a wide range of potential for use in various optical applications. In addition, the nonlinear refractive index (n2) values ranged from 3.26 × 10−11 to 26.35 × 10−11 (esu), while the χ(3) values varied from 5.16 × 10−12 to 33.34 × 10−12 (esu) for the BBBCr-glasses with chromium concentrations ranging from 0.0 to 0.5 mol%. The real part of permittivity has the same value with chromium doping up to 0.2 mol% and then it is highly increased for concentrations greater than 0.2 mol%. The findings of this study highlight the potential of bismuth-borate barium glasses doped with chromium as a highly versatile and adaptable material for use in a range of optical applications. [ABSTRACT FROM AUTHOR]

In this work, the role of insertion cobalt(II) on the physical properties, dielectric spectroscopy, and photon attenuation parameters of the prepared glasses 25NaF-10ZnO-(65-x)B2O3-xCoO-0.6Y2O3: x = 0.0 (Co-0.0) ≤ x ≤ 0.5 (Co-0.5) mol% has been investigated. The amorphous state of samples verified via the XRD measurements. The density (ρ) ∈ [2.9824, 3.0058 g.cm−3]. The molar volume (Vm) ∈ [21.868, 21.715 cm3.mol−1] as an increase of CoO from 0.0 to 0.5 mol% in the glass network. Dielectric spectroscopy of borate glass loaded with varying cobalt content was investigated throughout frequency range from 50 to 5 MHz. The recorded dielectric constant at 3 kHz was enhanced from 14.4 to 17.8 by cobalt doping. The dependency of tangent loss (tan δ) for all investigated glasses on frequency is normal behavior with dielectric relaxation which is enhanced and shifted by cobalt doping. At the photon energy (E = 0.015 MeV), the mass-attenuation-coefficient (MAC) values were 10.192, 10.246, 10.300, 10.354, and 10.408 cm2/g for the samples Co-0.0, Co-0.1, Co-0.2, Co-0.30, Co-0.4, and Co-0.5, respectively. These MAC values are corresponding to as increment of 0.216 cm2/g between the low and high CoO contents presented in the glass samples. Values of half value layer (HVL) of all proposed specimens were more significant than that of RS-360 and RS-520 commercial glasses. Results confirmed that the suggested glasses are suitable for radiation attenuation. [ABSTRACT FROM AUTHOR]