Abstract
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 (\(\upmu )\) 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.
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1 Introduction
Glass is a class of material that combines optical transparency, simplicity in molding, and low cost, and they are used in a variety of applications as a result. The characteristics of glass can be improved by doping them with activator ions (Khattari et al. 2022a, 2022b; Rammah et al. 2022, 2020a; Alsaif et al. 2023a). Glass has demonstrated outstanding rare earth ion host properties as well as high mechanical and thermal stability. Because of its use in cathode ray tubes, hybrid integrated circuits, magnetic heads, batteries, and solid oxide fuel cells, glass has a role in the solid-state ionic sector (Alrowaili et al. 2023; Alsaif et al. 2022, 2023b; Zakaly 2021).
Heavy metal oxide-containing ternary and quaternary glasses have been the subject of much investigation because of their use as ray absorbers, reflecting windows, mechanical sensors, and optical filters. Heavy metal oxide glasses also have strong chemical resistance and nonlinear optical characteristics (Hassaan et al. 2019; Arya and Singh 2015).
Borate glasses are a remarkable and intriguing glass system that, depending on changes in chemical composition, provides a variety of physical and chemical characteristics and has a wide range of uses. As a result, it can create different structural units in the glass network than silicon and phosphorus, which can only form tetrahedrally coordinated units with oxygens. Boron can modify its coordination with oxygens between three and four. Other than silicate glasses, borate glasses have received the most research attention. Gamma-ray protection, high-capacity reversible electrodes, preventing bacterial development, optical glasses, continuous filament fiberglass, and most recently as a bioactive material are just a few of the many uses for glasses containing B2O3 (Abdelghany and ElBatal 2013).
As glass modifiers, several heavy metal oxides (HMO) are introduced into the system of borate glasses to increase their chemical resistance and encourage the synthesis of more non-bridging oxygen (NBO) links; on the other hand, prior additions increase the sample density. These (HMO) include PbO, Bi2O3, and MoO3 (Sayyed et al. 2019). The mechanical and optical characteristics of the glasses are improved by adding barium carbonate (BaCO3) (Mariselvam and R. Arun kumar. 2021; Mariselvam 2021; Misbah et al. 2022).
Due to its higher atomic number (Z = 56), barium can enhance the gamma-ray attenuation property (Mariselvam 2022). Barium borate glasses have grown in significance as a result of their remarkable optical properties, high thermal conductivity, low melting point, excellent mechanical stability, and high transition metals (TMs) solubility (Marzouk et al. 2022; Aboud et al. 2022; Alsaif et al. 2023c).
The titanium-oxide-doped glasses have grown in significance recently among the numerous transition metal-oxide-doped glasses because of their potential use in non-linear optical devices such as ultrafast switches and power limiters. In silicate glasses, titanium oxide is typically thought of as a nucleating agent of crystallization. However, it has been shown that all other glass matrices include minor amounts of TiO2 that improve the glass-forming capacity and chemical resistance of the glasses. Titanium ions frequently occur in glass networks in the Ti4+ state and take part in the formation of glass networks with the structural elements TiO4, TiO6, and occasionally TiO5 (comprising trigonal bipyramids). Ti4+ ions’ empty or unfilled d-shells are a bigger factor in the non-linear polarizabilities. Additionally, the study of the coordinated chemistry of titanium ions in alkali fluoroborate glass networks is intriguing in and of itself since the presence of these ions may significantly alter a variety of physical characteristics, such as color, chemical resistance, mechanical strength, and insulating qualities (Nageswara Raoa et al. 2005). The Ti–O bond length (~ 1.96 Å), which can significantly increase the non-linear polarizabilities of TiO2, is another intriguing characteristic of this material (Alajerami et al. 2013). As a glass forming, TiO2 encourages something more polymerized structure and improves the stability of the glass concerning devitrification.
Six samples of titanium bismo-borate glasses with the chemical formula B2O3–BaO–Bi2O3–ZnO–TiO2 were created for the current study. TiO2’s impact on the produced glass’s structural, physical, optical, and gamma-ray efficacy has been studied for applications in radiation and optical protection.
2 Experimental work
2.1 Preparation of glasses
Using the conventional melt quenching method, the following glass samples were created: (65-X)B2O3–15BaO–5Bi2O3–15ZnO–XTiO2, where X = 0, 2, 4, 6, 8, and 10 mol% as shown in Table 1. The purity of all oxides, B2O3, BaCO3, Bi2O3, ZnO, and TiO2, was 99%. Weights totaling 10 g were produced for each composite combination. Powders were first precisely weighed by the molar ratio and thoroughly combined in a agate mortar for 30 min to guarantee optimum homogeneity. The resultant mixture was then put into exposed 50 mL porcelain crucibles, which were then pre-heated for 45 min at 300 °C in a usual setup. A clear, highly viscous liquid was created after it was transferred to another electric oven and roasted for 30 min at 1100–1150 °C The melting viscous was poured into cylinder stainless steel forms to produce glass discs. The produced glasses were normally annealed in a muffle furnace after being quenched, in which they are heated to 300 °C for 12 h to prevent bubble formation and thermal stress. Generally, the produced glasses are named Ti-X, and for each sample:
Ti-0.0: 65B2O3–15BaO–5Bi2O3–5ZnO–0.0TiO2, with density 3.70 g cm−3,
Ti-2.0: 63B2O3–15BaO–5Bi2O3–15ZnO–2.0TiO2, with density 3.77 g cm−3,
Ti-4.0: 61B2O3–15BaO–5Bi2O3–15ZnO–4.0TiO2, with density 3.81 g cm−3,
Ti-6.0: 59B2O3–15BaO–5Bi2O3–15ZnO–6.0TiO2, with density 3.84 g cm−3,
Ti-8.0: 57B2O3–15BaO–5Bi2O3–15ZnO–8.0TiO2, with density 3.88 g cm−3, and.
Ti-10.0: 55B2O3–15BaO–5Bi2O3–15ZnO–10.0TiO2, with density 3.93 g cm−3.
A photo of the produced Ti-X glasses is depicted in Fig. 1. As seen, as TiO2 content increases, there is grading in color from yellowish brown to brown.
2.2 Measurements
The amorphous state of the prepared Ti-X glasses confirmed by X-ray diffraction (XRD) measurements (Bruker D8 Advance diffractometer) using Cu Kα radiation (k = 1.54 Ω) at 40 kV and 100 mA.
The Ti-X glasses’ density (ρ) was measured through the Archimedes principle. A floating liquid Toluene with a density of ρToluene = 0.865 g cm−3 was used for the measurements. The density of each sample can be evaluated as follows:
where Wair and WToluene represent to the weight of sample in air and Toluene liquid, respectively.
For every glass sample, the molar volume (Vm) is computed as follows:
where glass’s molecular weight is expressed as MWglass.
A double-beam-spectrophotometer (type: Cary-5000 UV Vis NIR) was used at an ambient temperature to examine the UV and/or VIS absorption spectrum of Ti-X glasses.
2.3 Methods
2.3.1 MCNP5 simulation code
The γ-ray simulations of the studied Ti-X glasses were achieved by employing the Monte-Carlo simulation code-5 (MCNP) with a single energy point source in the photon energy (E) from 0.015 to 15 MeV ENDF/B.VI8 nuclear database (Brown et al. 2002). It stimulates the transit of X/γ-rays, and neutrons while considering the physics interaction processes ((PE) photoelectric effect, (CS) compton scattering process, and (PP) pair production processes) (M.C. Team 2003; Mosorov and Abdullah 2011). The input files of the MCNP code need detailed data (e.g., source dimensions, sample elemental composition, etc.) to get accurate output results (Akkurt and Malidarre 2021). The experimental arrangement has considered all parameters. A cell card in a text file described the γ-source, primary collimator, sample, secondary collimator, and detector (Zhou et al. 2014). The γ-source was found to be a single-energy beam located 16 cm from the detector. The command tally F4:P determines the average track length of the incident γ-rays emitted from the simulated gamma source. A dynamic view of the radiation attenuation simulation system for the investigated Ti-X glasses is shown in Fig. 2. The samples were created as a cylinder geometry (diameter = 3 cm) and located between the source and the detection region (Zhou et al. 2014). The fabricated Ti-X glass samples’ elemental composition was created in the input file’s material card. A total of NPS = 10 million particles per run is used for all computations to achieve the minimum random statistical errors.
The intensity of the incident (I0) and transmitted (I) γ-ray photons was measured for each Ti-X glass sample. The linear-attenuation (LAC = μ) coefficient can be calculated using Lambert-the following (Lakshminarayana et al. 2018; Kaky et al. 2023; Salem et al. 2023):
where x is the thickness of the glass samples. An important sign of a material’s characteristic is the mass-attenuation coefficient (MAC = μm), which is calculated as follows (Kaky et al. 2023):
The μ parameter calculates the values needed to reduce the incident radiation to half or a tenth- of its original value. The half-value (HVL) and the tenth-value (TVL) layers can be calculated as follows (Salem et al. 2023; Mhareb et al. 2021):
The mean free path (MFP) is the average track distance photon movements before colliding with the attenuator using the following equation (Kaky et al. 2020):
Also, the radiation protection efficiency (RPE) is an important statistic to take into account when determining the level of attenuation that could be provided by various shielding materials. Also, the transfer factor (TF) is the factor that indicates the transmitted photons would be transferred through the Ti-X glasses, the RPE and TF factors can calculated as follows (Kaky et al. 2019):
The effective atomic number (Zef): can be computed as (Alfryyan et al. 2023):
where fi denotes the target element’s fractional abundance. The average atomic mass of any material is ∑fiAi structure. Zi denotes the atomic number.
2.3.2 Phy-X (PhX) program
The Phy-X/PSD (PhX) is online free software used to calculate the MAC for the elements/compositions of any material (Sakar et al. 2020). In order to examine the samples under study, all of the radiation shielding parameters were chosen as output data (Sakar et al. 2020). The relative differences (φ, %) was also calculated by comparing the data obtained from PhX and MCNP as follows (Rammah et al. 2020b):
3 Results and discussion
3.1 XRD patterns
Figure 3 depicts the XRD patterns for the prepared Ti-X glasses. As shown in Fig. 3, the XRD patterns characterized by no sharp peaks and have a broadening peak in the range of 2Ɵ = 20°–30°. This observation demonstrated the amorphous nature of prepared glass samples.
3.2 Density and molar volume
In order to evaluate the geometric configurations of the glass network concerning variations in its structural compactness, the density (ρ) and molar volume (Vm) analysis are necessary. The ρ and Vm of the investigated Ti-X glass samples are influenced by the TiO2 concentration. As seen in Fig. 4, the higher molar mass (79.899 g mol−1) and density (4.230 g cm−3) of TiO2 replaces the lower molar mass (69.620 g mol−1) and density (2.460 g cm−3) of B2O3, causing the glass samples to increase in density as the TiO2 content increases progressively (see Table 1). Furthermore, the significant improvement in density as TiO2 content increases can be attributed to the conversion of certain BO3 groups into BO4 groups, which increases the amount of non-bridging oxygen bonds (NBOs) at the expense of bridging oxygen bonds (BO). In contrast, as the TiO2 content increases, the Vm decreases. This suggests that as the ratio of TiO2 increases, the structure becomes loosely packed.
3.3 Optical studies
Figure 5a represents the optical absorption spectra for Ti-0.0, Ti-2.0, Ti-4.0, Ti-6.0, Ti-8.0, and Ti-10.0 glasses within a wavelength range of 300–1100 nm. For more investigations, a comparison between the undoped glass samples with the glass sample comprising the highest concentrations of TiO2 was presented in Fig. 5b. The optical absorption spectrum of the TiO2-free glass sample (Ti-0.0) displays only one absorption band at about 380 nm (marked by * in Fig. 5b). Furthermore, this band is associated with the Bi cations as reported in Ref. (Mansour et al. 2021). After adding TiO2 to the glass samples, some absorption bands in the ultraviolet and visible regions are formed. The inset of Fig. 5b displays the deconvolution of two absorption bands shown at 520 and 680 nm after the addition of TiO2. These absorption bands can be explained as follows, titanium cations can exist in two oxidation states, specifically the trivalent (Ti3+) and the tetravalent (Ti4+) ions (Marzouk et al. 2016). Ti3+ cations have the 3d1 electronic configurations and consequently display an absorption band at approximately 440–480 nm (labeled by # in Fig. 5b) and sometimes with distortion of Ti3+ cations, two absorption bands at about 540 and 680 nm are formed (Marzouk et al. 2016). The band at 540 nm can be ascribed to 2B2g \(\to \) 2B1g, and the band 66 at 80 nm can be associated with 2B2g \(\to \) 2A1g electronic transitions of Ti3+ cations in tetragonal distorted octahedral symmetry (Alajerami et al. 1026). Moreover, tetravalent titanium (Ti4+) cations have d0 electronic configurations and display no absorption bands in the visible range but only show ultraviolet absorption bands (Marzouk et al. 2016).
Furthermore, the optical band gaps (Eg) of these glass samples are determined by applying the Mott and Davis relationship (Davis and Mott 1970):
where (α) is the absorption coefficient and (hυ) is the photon energy. The exponent n = 2 for the indirect allowed electronic transition, which relates to the majority of potential electronic transitions in amorphous materials, i.e., indirect band transitions, the most accurate computation of the transitions to the non-sharp absorption edge was found (Sadeq and Ibrahim 2021). h is the plank’s constant and the absorption coefficient is α. In this study, we computed the optical band gaps (Eg) values for all glass specimens with varying TiO2 concentrations by finding the intersection of the extrapolated linear section of the plots [(αhν)1/2 vs. (hν)] (also known as Tauc’s plot (Tauc 1974)) with the x-axis [(αhν)1/2 = 0], as shown in Fig. 6. The obtained values of Eg are 2.55, 2.51, 2.47, 2.37, 2.27, and 2.18 eV for Ti-0.0, Ti-2.0, Ti-4.0, Ti-6.0, Ti-8.0, and Ti-10.0 glasses, respectively. As depicted in Fig. 7, the shrinkage in Eg values with the added TiO2 additives is ascribed to the increased contents of NBOs in the glassy matrix. Besides, the creation of NBO rather than BO results in an increase in disorder, which results in lesser values of band gap energies (Sayyed et al. 2022).
Additionally, the refractive index (n0) of the Ti-X samples was calculated with the help of Eg values using Saad’s formula (Negm et al. 2023),
where \({S}^{2}\) is a constant; \({S}^{2}\)= 136.89 eV. The calculated values of n0 are 2.515, 2.527, 2.539, 2.569, 2.601 and 2.631 for Ti-0.0, Ti-2.0, Ti-4.0, Ti-6.0, Ti-8.0 and Ti-10.0 glasses, respectively and these values are offered in Fig. 8. These increases are ascribed to the diminished values of Eg values with higher NBO creation with the added TiO2 from 0 to 10.0 mol%.
3.4 Shielding qualities against gamma-ray
Figure 9a–c represents the LAC of the fabricated Ti-X glass samples. Tables 2 and 3 represent the µ values using MCNP code and PhX software in the γ-energy range of 0.015–15 MeV. The values of simulated µ are in decent agreement with the values calculated by PhX with a maximum φ of 4.118%. The µ values of the fabricated Ti-X glass samples decrease as the γ-energy increases. The simulated µ values drop from 159.670 to 0.120 cm−1 for Ti-0.0, from 164.174 to 0.123 cm−1 for Ti-2.0, from 166.874 to 0.125 cm−1 for Ti-4.0, from 169.231 to 0.126 cm−1 for TI-6.0, from 172.177 to 0.127 cm−1 for Ti-8.0 glass sample, and from 175.506 to 0.129 cm−1 for Ti-10.0 glass sample at photon energy range from 0.015 to 15 MeV.
Figure 9a shows that there is a tough reduction in the µ values for all the fabricated Ti-X glass samples because of the PE interaction, which has changed in the cross-section with the interaction cross-section decreases strongly with the enrichment of Eγ values associated with a similar reduction in the PE interactions. The increase of the applied Eγ values between 0.015: 0.2 MeV causes a tough exponential decreasing tendency from 159.670 to 1.312 cm−1 for Ti-0.0, from 164.174 to 1.334 cm−1 for Ti-2.0, from 166.874 to 1.354 cm−1 for Ti-4.0, from 169.231 to 1.365 cm−1 for Ti-6.0, from 172.177 to 1.380 cm−1 for Ti-8.0 glass sample, and from 175.506 to 1.399 cm−1 for Ti-10.0 glass sample.
As shown in Fig. 9b, the simulated µ values in the energy photon interval from 0.3: 5 MeV undergo an exponential drop due to the enrichment of Eγ > 0.2 MeV. The CS interaction with changes in cross-section caused by Eγ−1 is blamed for the exponential decline (Khattari et al. 2024; Shahboub et al. 2023). It is explained by higher energy photons’ lower propensity to interact with the material’s atoms results from their greater velocity. As a result, when energy increases, the likelihood of photon absorption falls, and the likelihood of photon scattering increases (Saleh et al. 2022). The enrichment in Eγ values was linked to a smooth decrease in the cross-section with drops in the quantity of photon-electron interactions, followed by a smooth drop in the µ values. The reduction in µ was from 0.670 to 0.120 cm−1 for Ti-0.0, from 0.682 to 0.122 cm−1 for Ti-2.0, from 0.692 to 0.124 cm−1 for Ti-4.0, from 0.697 to 0.125 cm−1 for Ti-6.0, from 0.705 to 0.126 cm−1 for Ti-8.0 glass sample, and from 0.714 to 0.128 cm−1 for Ti-10.0 glass sample with raising the Eγ values between 0.3: 5 MeV, respectively.
Also, there is a slight increase due to the PP interaction with cross-section changes with \({E}_{\gamma }^{2}\) (Ekinci et al. 2022) as seen in Fig. 9c. The µ were from 0.117 to 0.120 cm−1 for Ti-0.0, from 0.119 to 0.123 cm−1 for Ti-2.0, from 0.121 to 0.125 cm−1 for Ti-4.0, from 0.122 to 0.126 cm−1 for Ti-6.0, from 0.123 to 0.127 cm−1 for Ti-8.0 glass sample, and from 0.125 to 0.129 cm−1 for Ti-10.0 glass sample with raising the Eγ values between 6: 15 MeV. From the previous results, the addition of the TiO2 to the zinc sodium lead borated glasses increases the values of the LAC values significantly. In comparison to the other samples, Ti-10.0 has the greatest µ values due to the concentration of TiO2 (10 mol%) as well as the high density (3.930 g cm−3).
The mass attenuation coefficient (MAC) of the Ti-X glasses behaves similarly to the µ. The MAC was varied from 43.154 to 0.033 cm2 g−1 for Ti-0.0, from 43.547 to 0. 033 cm2 g−1 for Ti-2.0, from 43.799 to 0.033 cm2 g−1 for Ti-4.0, from 44.070 to 0.033 cm2 g−1 for Ti-6.0, from 44.376 to 0.033 cm2 g−1 for Ti-8.0 sample, and from 44.658 to 0.033 cm2 g−1 for Ti-10.0 glass sample as realized in Fig. 10.
Figure 11a and b show a comparison of the µm and µ between the fabricated glasses and those of commercial concrete (H-serpentine, I-limonite, B-magnetite, Ilmenite, S-scrap, and S-magnetite concretes (Bashter 1997) and some common glasses (RS-253-G18 (Zahran et al. 2022), and TZNNd9 (Zakaly et al. 2023)) at chosen energies 0.5, 5 and 10 MeV. At 0.5, 5, and 10 MeV, the µ of the Ti-10 glass sample have higher values than those of concretes and glasses but the TZNNd9 glass sample. At 5, and 10 MeV, the µm of the Ti-10 glass sample have higher values than those of concretes and glasses but the TZNNd9 glass sample. At 0.5 MeV, the µm of the Ti-10 glass sample have higher values than those of concretes and glasses samples.
The half- and tenth-value layer (HVL, TVL) and mean free path (MFP) are ordinary measures of radiation protection efficiency. For a given Eγ, a stronger radiation shielding performance is often seen with a lower value for either parameter, as radiation is attenuated as it travels through a narrower zone (Saleh et al. 2022). Figure 12a–c presents the values of HVL, TVL, and MF computed by Eqs. (5), (6), and (7). The HVL of investigated Ti-X glass samples increased as the µ values decreased. The HVL values grew from 0.004 to 5.755 cm for Ti-0.0, from 0.004 to 5.636 cm for Ti-2.0, from 0.004 to 5.564 cm for Ti-4.0, from 0.004 to 5.509 cm for Ti-6.0, from 0.004 to 5.440 cm for Ti-8.0 sample, and from 0.004 to 5.359 cm for Ti-10.0 glass sample with raising the energy values from 0.015: 15 MeV, respectively as seen in Fig. 12a. The TVL values take the same trend as the HVL as seen in Fig. 12b. The variations of MFP with photon energy are illustrated in Fig. 12c. The MFP values range from 0.006 to 8.302 cm for Ti-0.0, from 0.006 to 8.131 cm for Ti-2.0, from 0.006 to 8.027 cm for Ti-4.0, from 0.006 to 7.947 cm for Ti-6.0, from 0.006 to 7.848 cm for Ti-8.0 sample, and from 0.006 to 7.732 cm for Ti-10.0 glass sample, respectively. Based on the results, it was discovered that the quantity of TiO2 affected the HVL, TVL, and MFP values. This means that the Ti-10.0 glass sample had the lowest HVL, TVL, and MFL values, while the Ti-0.0 sample had the highest values. This suggests that the TiO2 plays a role in the γ-rays attenuation performance of the Ti-X glasses.
Figures 13 and 14 show the transfer factor (TF) and the RPE of the Ti-X glasses. It shows that the RPE values are close to 100% at very low gamma ray energy (up to 0.015 MeV). When the gamma-photon energy was increased, the penetrating strength of the delivered photons also increased, leading to a significant decrease in the RPE levels. Therefore, increasing the gamma-photon energy decreases the photon-electron interactions within the manufactured glasses. The number of scattered photons increases once the photon-electron interaction is reduced, which has a detrimental effect on the RPE for the Ti-X glass samples. For example, The RPE values dropped from ≈ 100.000 at 0.015 for all Ti-X glass samples to 5.845%, 5.964%, 6.039%, 6.098%, 6.172%, and 6.262% respectively, for Ti-X glass samples where X = 0.0, 0.2, 0.4, 0.6, 0.8, and 10.0, respectively at gamma-ray energy 15 MeV. The results confirm a great shielding capacity for the Ti-X glass sample in the energy range from 0.015 to 0.1 MeV. Also, the Ti-X glass sample shows a good shielding capacity above 0.020–15 MeV.
The Zef, the effective atomic number of a composite, is a crucial metric that has many practical uses in contemporary technology, engineering, and physics. The value of Zef explains the different characteristics of a material. The relationship between the Zef and the Eγ for the glasses under study is shown in Fig. 15. Increases in Zef value are often indicative of enhanced radiation interaction, especially through the compton effect and photoelectric effect, in a given material. Consequently, high Zef-value materials may better block high-energy radiation (Mostafa et al. 2021; Ibrahim et al. 2024; Nabil et al. 2023; Dh Hassib et al. 2019; Kaky and Sayyed 2024; Lakshminarayana et al. 2016; Kaky et al. 2017). It shows that different materials may be more or less successful in attenuating radiation depending on the energy of the radiation, with greater and lower MeV requiring different materials. For the energy spectrum of interest, the range of \({Z}_{ef}\) of the fabricated Ti-X glass varied from 51.590 to 19.480, 50.676 to 19.722, 50.696 to 19.833, 50.271 to 20.012, 49.860 to 20.193, and 49.460 to 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. The Ti-0.0 has the lowest Zef values among the Ti-X six glasses. The Ti-10.0 glass sample has the highest Zef values among the energy range from 0.015: 15 MeV due to the high doping with the TiO2 = 10 mol%.
4 Conclusion
Using the conventional melt quenching method, the glass samples with the chemical formula (65-X)B2O3–15BaO–5Bi2O3–15ZnO–XTiO2, where X = 0, 2, 4, 6, 8, and 10 mol% have been prepared. Samples densities, molar volume, and optical characteristics of the prepared glasses have been investigated. Also, the gamma-ray protection features of the investigated glasses have been evaluated. The glass’s densities were increased gradually from 3.70 to 3.93 g cm−3 and the molar volume was decreased from 27.71 to 26.72 cm3 mol−1 as the TiO2 content increased from 0 to 10 mol%. After adding TiO2 to the glass samples, some absorption bands in the ultraviolet and visible regions are formed. The obtained values of indirect optical band gaps (Eg) were 2.55, 2.51, 2.47, 2.37, 2.27, and 2.18 eV for Ti-0.0, Ti-2.0, Ti-4.0, Ti-6.0, Ti-8.0 and Ti-10.0 glasses, respectively. The calculated values of n0 were 2.515, 2.527, 2.539, 2.569, 2.601, and 2.631 for Ti-0.0, Ti-2.0, Ti-4.0, Ti-6.0, Ti-8.0, and Ti-10.0 glasses, respectively. The \(\mathrm{linear attenuation coefficient{\prime}}{\text{s}}\) order is: Ti-0.0 < Ti-2.0 < Ti-4.0 < Ti-6.0 < Ti-8.0 < Ti-10.0. The prepared Ti-10.0 glass sample (highest content of TiO2) has the lowest HVL, TVL, and MFP. The prepared Ti-10.0 glass sample presents the best gamma radiation shielding capability among the prepared Ti-X glasses. The obtained results confirmed that the suggested titanium bismo-borate glasses can be used in the optical field and as alternative materials for radiation shielding applications.
Data availability
All data generated or analyzed during this study are included in this published article.
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The authors express their gratitude to Princess Nourah bint Abdulrahman University Researchers Supporting Project number (PNURSP2024R60), Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia. The authors extend their appreciation to the Deanship of Scientific Research at Northern Border University, Arar, KSA for funding this research work through the project number “NBU-FFR-2024–289-02”.
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Alsaif, N.A.M., Alfryyan, N., Al-Ghamdi, H. et al. The impact of TiO2 on physical, optical characteristics and shielding qualities against γ-ray features of titanium bismo-borate glasses. Opt Quant Electron 56, 816 (2024). https://doi.org/10.1007/s11082-024-06702-2
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DOI: https://doi.org/10.1007/s11082-024-06702-2