Crystallization, spectroscopic and dielectric properties of CuO-added magnesium aluminosilicate-based glasses

Liu, Lidan; Liu, Taoyong; Liu, Piao; Huang, Qianxing; Gui, Hua; Lu, Anxian

doi:10.1016/j.ceramint.2021.08.163

Cited by 9 publications

(6 citation statements)

References 47 publications

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“…CuO is known to behave as a dielectric, which might hinder its electron movement, thus decreasing its overall conductivity. An increase in insulating properties upon the increase in CuO content has been reported elsewhere [48]. Adding a small amount of Cu in the CaP coating (0.2CuO-CaP) resulted in an increase in the corrosion current density (16.3 ± 1.6 nA/cm 2 ) compared to the CaP coated sample, but still much lower than the uncoated Ti sample.…”

Section: Analysis Of Deposited Coatingssupporting

confidence: 65%

Influence of Cu Substitution on the Properties of Hydroxyapatite Targets and Deposited Coatings

et al. 2023

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In addressing the issue of optimizing the mechanical and electrochemical properties of hydroxyapatite (CaP) materials for biomedical applications, this research explored the incorporation of copper (Cu) into the material and scrutinized its impact through various processing stages, from powders to ceramics and finally to coatings. Our investigation indicated that the integration of CuO into CaP significantly changed the lattice parameters of hydroxyapatite from manufactured powders to sintered targets, indicating a structural evolution. Simultaneously, the change in the elemental composition and Ca/P ratio was also followed by each step from manufactured powders to deposited coatings. Mechanical testing revealed an impressive increase in the hardness of coatings to a high of 37 GPa for the 0.2CuO-CaP sample, a substantial improvement when compared to 13 GPa for pure Ti. The corrosion resistance of the coatings also improved, evidenced by the decrease in corrosion current density (Icorr) from 60.2 ± 5.2 nA/cm2 for pure Ti to a lower 3.9 ± 0.5 nA/cm2 for the CaP coating. Our study has revealed that the structural, mechanical, and electrochemical properties of CaP materials can be finely adjusted through the addition of Cu, promising advances in the realm of biomedical applications. Moreover, these results hint at the potential to tune the electrophysical characteristics of CaP coatings, an avenue for future exploration.

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Section: Analysis Of Deposited Coatingssupporting

confidence: 65%

Influence of Cu Substitution on the Properties of Hydroxyapatite Targets and Deposited Coatings

et al. 2023

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“…The relationship between the average of g factor g, cubic CF parameter D q and the covalency factor N for Cu 2þ in xCuO À ð68 À xÞV 2 O 5 À 32TeO 2 with x = 5, 10, 20, 30 mol% absorption band of Cu 2þ occupying the center of axisymmetrical octahedral symmetry is generally located at 755-1000 nm (1320-1000 cm À1 ). [56][57][58][59] In the optical absorption spectrum of glasses, the position of the absorption band will move towards the infrared spectrum with the increase of CuO content, [60][61][62] further confirming that the calculated D q value decreases with the increase of x concentration is reasonable. For Cu 2þ in different crystals, the range of κ is generally within 0.2-0.6.…”

Section: G U R Ementioning

confidence: 76%

Investigations on the local structure and the spin Hamiltonian parameters for Cu²⁺ in xCuO−(68−x)V₂O₅−32TeO₂ glasses

Liu

Yang

et al. 2022

Magnetic Reson in Chemistry

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The defect structure, spin Hamiltonian parameters (SHPs: anisotropic g factors g k and g ⊥ and the hyperfine structure constants A k and A ⊥ ), and their compositional dependence of Cu 2þ in xCuO À ð68 À xÞV 2 O 5 À 32TeO 2 (x = 5, 10, 20, 30 mol%) glasses are quantitatively analyzed by using the higher-order perturbation formula of octahedral complex with tetrahedral elongation distortion. Due to the Jahn-Teller effect, the ½CuO 6 10À group is subjected to tetragonal elongation distortion of varying degrees. D q , N, ρ, κ, and H show nonlinear changes with the concentrations of Cu 2þ . When x = 10 mol% CuO, the degree of distortion (ρ ≈ 0:1%) is the smallest; when x = 30 mol% CuO, the degree of distortion (ρ ≈ 15%) is the largest, which indicates that excessive distortion leads to the appearance of Z-axis oxygen vacancies and the coordination number of copper ions from six to four. The increasing tendency of the evaluated N and H reveals decreasing covalency of the whole glass system. Present theoretical studies would be useful to the explore the structural properties and optical applications of glass with different CuO concentrations. K E Y W O R D Selectron paramagnetic resonance, local structure, xCuO À ð68 À xÞV 2 O 5 À 32TeO 2 (x = 5, 10, 20, 30 mol%)

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“…The presence of copper ions significantly impacts the electrical, optical, and magnetic properties of glasses. Numerous exciting studies have focused on the environment of Cu ions in various inorganic systems [13]. Cu is widely used in many commercial glasses, including rubies, aventurine, and red glass hematite.…”

Section: Introductionmentioning

confidence: 99%

Structural, optical, and shielding properties of lead borate glasses doped with copper oxide

Bawazeer

2024

Mater. Res. Express

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Lead borate glasses of the system 25PbO-(75-x) B2O3-xCuO (x = 0, 0.025, 0.05, and 0.1) in mol.% were synthesized via the traditional melt quenching method abbreviated as (BPbCu0, BPbCu1, BPbCu2, and BPbCu3) respectively. XRD diffraction confirmed the amorphous nature of the samples. According to FTIR spectroscopy, the function groups (BO3 and BO4) and the fraction of boron tetrahedral units (N4) were determined. The density, molar volume, packing density, and some other physical parameters were calculated and discussed. The density was increased by incorporating CuO as a substitution for B2O3, while the molar volume was decreased. The ion concentrations of Cu, inter-nuclear distance, field strength, and polaron radius were also computed. The optical absorption study suggested that the copper ions exist in the Cu2+ and act as a modifier by increasing the disorder in the glass network. Hence, the present glass behaves as a bandpass filter in the UV-Vis. region. The radiation shielding properties of the as-prepared samples were theoretically calculated using the Phy-X program at energies ranging from 0.015 to 1.5 MeV. The linear and mass attenuation coefficients, as well as the half-value layer (HVL) and exposure buildup factor (EBF), have been evaluated. The results revealed that shielding parameters are affected by CuO concentrations and photon energy. Based on the results presented in the manuscript, the glass sample with 0.1 mol% CuO doping (BPbCu3) showed the best properties overall for optical and radiation shielding applications. Specifically, BPbCu3 had the highest density, refractive index, optical dielectric constant, and radiation shielding parameters such as linear attenuation coefficient and half value layer among the glass samples. The addition of 0.1 mol% CuO introduced Cu2+ ions which acted as network modifiers, increasing the disorder in the glass structure. This in turn enhanced the optical bandgap as well as the shielding capabilities against gamma radiation.

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Crystallization, spectroscopic and dielectric properties of CuO-added magnesium aluminosilicate-based glasses

Cited by 9 publications

References 47 publications

Influence of Cu Substitution on the Properties of Hydroxyapatite Targets and Deposited Coatings

Influence of Cu Substitution on the Properties of Hydroxyapatite Targets and Deposited Coatings

Investigations on the local structure and the spin Hamiltonian parameters for Cu²⁺ in xCuO−(68−x)V₂O₅−32TeO₂ glasses

Structural, optical, and shielding properties of lead borate glasses doped with copper oxide

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Crystallization, spectroscopic and dielectric properties of CuO-added magnesium aluminosilicate-based glasses

Cited by 9 publications

References 47 publications

Influence of Cu Substitution on the Properties of Hydroxyapatite Targets and Deposited Coatings

Influence of Cu Substitution on the Properties of Hydroxyapatite Targets and Deposited Coatings

Investigations on the local structure and the spin Hamiltonian parameters for Cu2+ in xCuO−(68−x)V2O5−32TeO2 glasses

Structural, optical, and shielding properties of lead borate glasses doped with copper oxide

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Investigations on the local structure and the spin Hamiltonian parameters for Cu²⁺ in xCuO−(68−x)V₂O₅−32TeO₂ glasses