Infrared and Raman investigation of vitreous antimony trioxide

doi:10.1016/0584-8539(82)80146-3

Spectrochimica Acta Part A: Molecular Spectroscopy

Volume 38, Issue 5, 1982, Pages 555-559

Spectrochimica Acta ...

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Abstract

The vibrational spectrum of vitreous Sb₂O₃ has been recorded, using the techniques of i.r. and Raman spectroscopy. A general valence force field calculation was performed with the assumption that the basic structural unit of the vitreous phase is O₂SbOSbO₂. The observed and calculated spectra are in good agreement, suggesting that the glass structure of Sb₂O₃ is similar to that of the well-known two-dimensional layered form of vitreous As₂O₃.

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The results showed that NCA improved the rutting and fatigue cracking performance of the bitumen [16,17,18,19]. Antimony trioxide (Sb2O3) has the glass structure similar to that of the well-known two-dimensional layered form of vitreous As2O3 [20]. Sb2O3 nanoparticle was selected as it is expected to reduce the aging effect on bitumen, and is a novel material that has not been studied extensively in the literature.
Sb₂O₃ nanoparticle was selected as it is expected to reduce the aging effect on bitumen, and is a novel material hasn’t studied yet in the literature. Bitumen was modified by antimony trioxide (Sb₂O₃) nano particle. The rutting performance of Sb₂O₃ modified bitumen and the performance of Hot Mix Asphalt (HMA) was investigated. Multiple stress creep recovery (MSCR) test was performed. HMA mixtures were tested using the Indirect Tensile Strength (IDT) test. HMA mixtures were aged in the oven for short and long-term aging before conducting Hamburg Wheel Tracking (HWT) test to determine the rutting performance of the HMA mixtures. After aging, Sb₂O₃ modified bitumen becomes more resistive according to the results of both the bitumen and HMA tests. As a result, three percent Sb₂O₃ modified bitumen had better performance similar Jnr and R%. The best rutting performance was determined for 3% Sb₂O₃ modified bitumen with 4.3 mm rut depth.
Influence of Sb<inf>2</inf>O<inf>3</inf> on vibrational and optical properties of TeO<inf>2</inf>-Nb<inf>2</inf>O<inf>5</inf> glass system
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Tellurite glasses containing Sb₂O₃ has been prepared from the conventional melt quenching technique. Optical parameters were determined from optical absorption data. Variation of optical band gap (E_opt), Urbach energy (ΔE), refractive index (n), optical basicity (Ʌ), and electronic polarizability (α) with the variation in Sb₂O₃ content is studied. Fourier transform infrared (FTIR) and Raman spectroscopic studies proposed that the glass consists of [TeO₃] and [TeO₄] and [SbO₃] and [NbO₆] structural units. The glass transition temperature (T_g), onset crystallization temperature (T_o), thermal stability (ΔT) of the glasses were studied by Differential scanning calorimetry (DSC). Glass transition temperature (T_g) decreased with increase in Sb₂O₃ in these glasses. The Spin Hamiltonian parameters of VO²⁺ ions showed a linear decrease with decrease in the Sb₂O₃. EPR results suggest that VO²⁺ occupies octahedral site with tetrahedral compression. From structural, thermal and optical studies it is clear that the variation in the Sb₂O₃ in the glass does affect the structural arrangement of atoms inside the glass network which results in variation in glass properties.
Influence of Y<inf>2</inf>O<inf>3</inf>, Sc<inf>2</inf>O<inf>3</inf> and HfO<inf>2</inf> dopants on green emission of Er<sup>3+</sup> ions in PbO–Sb<inf>2</inf>O<inf>3</inf> glasses
2017, Journal of Luminescence
Lead antimonate glasses doped with 1.0 mol% of Er₂O₃ and co-doped with Y₂O₃, Sc₂O₃ and HfO₂ were synthesized. Optical absorption and luminescence spectra of the prepared glasses were recorded at ambient temperature. The spectra were characterized using Judd–Ofelt theory and various radiative parameters viz., transition probability A, branching ratio β and the radiative lifetime τ of principal emission transitions of these glasses have been evaluated. The results indicated a significant enhancement in the intensity of green and orange emissions of Er³⁺ ions due to co-doping of the glass system with Y₂O₃, Sc₂O₃ and HfO₂. The quantitative analysis of the results pointed out that hafnia is the most favorable oxide among the three co-dopants for getting the highest quantum efficiency of green and orange emissions. The results were further analyzed based on the structural modifications taking place in the vicinity of Er³⁺ ions due to co-doping with Y₂O₃, Sc₂O₃ and HfO₂ and the reasons for such improvement have been identified and discussed.
Luminescence emission features of Nd<sup>3+</sup> ions in PbO–Sb<inf>2</inf>O<inf>3</inf> glasses mixed with Sc<inf>2</inf>O<inf>3</inf>/Y<inf>2</inf>O<inf>3</inf>/HfO<inf>2</inf>
2017, Optical Materials
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However, in the presence of the modifiers like PbO, it participates in the glass network with SbO3 structural units with the oxygen at three corners and the lone pair of electrons at the fourth corner. In several glass systems it was reported that the bond length of Sb–O in SbO3structural units lay in between 2.0 and 2.6 Å [39–41]. In the glass network, the polyhedra of SbO3 units are joined together with sharing of corners and form double infinite chains with the lone pair of electrons pointing outward.
The objective of this study is to investigate the principal role of Y₂O₃, Sc₂O₃ and HfO₂ on the enhancement of 1.06 μm emission beam of Nd³⁺ ion in PbO–Sb₂O₃ glass system. The emission spectrum of Nd³⁺ doped glass exhibited emission bands at 900, 1060 and 1335 nm. When the glasses are co-doped with Y₂O₃, Sc₂O₃ and HfO₂ and excited at 528 nm, a substantial hike in the intensity of 1060 nm emission band is observed. The comparison of luminescence efficiency of Nd³⁺ ion of the glasses mixed with three co-dopants indicated the highest enhancement in the intensity of this emission in the glass co-doped HfO₂. The reasons for such enhancement have been discussed in the light of varying environment of the glass network in the vicinity of Nd³⁺ rare earth ions.
AgSbS<inf>2</inf> and Ag<inf>3</inf>SbS<inf>3</inf> absorber materials for photovoltaic applications
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Citation Excerpt :
Fig. 7 shows the FTIR spectra of Sb2S3, AgSbS2, and Ag3SbS3 thin films. In this Fig. 7 (a) two characteristic peaks were observed at 594 cm−1 and 448 cm−1 which confirm the presence of stretching vibrational mode of Sb2O3 [17], this supports the XRD results. In Fig. 7 (b), the peak appears at 1054 cm−1 attributed to the presence of Ag2SO4 [18].
Thermally evaporated Sb₂S₃ and Ag-Sb₂S₃ thin films were prepared by using Sb₂S₃ and Ag nanopowders as precursors. The deposited films were annealed at 250 °C and 300 °C in the air atmosphere and were characterized by using XRD, SEM, AFM, UV–VISible, FTIR and electrical studies. The deposited film showed amorphous in nature at the annealing temperature less than 250 °C whereas the monoclinic structure of Ag₃SbS₃ is noticed in above 250 °C annealing temperatures. AFM studies reveal the morphological change with respect to the annealing temperature. The direct band gap was found to be 2.02 eV, 1.83 eV and 1.74 eV for Sb₂S₃, AgSbS₂, Ag₃SbS₃ respectively. FTIR spectra showed the stretching vibrational mode of Ag-O, AgSO₄and Sb₂O₃. The electrical conductivity of Ag₃SbS₃ film is better (σ = 1.01 mho cm⁻¹) than that of AgSbS₂ (σ = 0.71 mho cm⁻¹). The opto-structural and electrical studies revealed that the film Ag₃SbS₃ is identified as the potential absorber for photovoltaic application. The photosensitivity of the ITO: AgSbS₂/CdS and ITO: Ag₃SbS₃/CdS thin films is found to be about 58% and 61% respectively.
Erbium ions oscillator strength and emission enhancement in antimony phosphate amorphous matrix
2016, Journal of Non-Crystalline Solids
For the first time we report the Er^3 + ions concentration dependent physical, absorption and emission properties of melt quench synthesized antimony glass having composition (60 − x)Sb₂O₃–35P₂O₅–5MgO–xEr₂O₃ (0.1 ≤ x ≤ 0.9 mol.%). Transparent glass samples having light yellow and deep pink colors are obtained. Glass density varied between 4.4 and 4.46 g/cm³ as the Er₂O₃ contents are increased. Glass with 0.3 mol.% of Er₂O₃ revealed the highest density, lowest band gap energy, and maximum refractive index. UV–Vis–NIR spectra exhibited ten absorption bands accompanied by peak shift. Bonding of Er^3 + ions with ligands is found to alter from covalent to ionic character. Oscillator strength followed the trend of ²H_11/2 > ⁴G_11/2, ⁴G_9/2 > ⁴F_9/2 > ⁴I_13/2 > ⁴F_7/2 > ⁴I_11/2 > ⁴F_5/2, ⁴F_3/2 > ⁴I_9/2 > ⁴S_3/2. Room temperature emission spectra under 380 nm excitations comprised of intense (centered at 481.5, 457.5, 444, 438, 431, 421, and 410.5 nm) and weak (centered at 746.5, 538, 528.5, and 506 nm) peaks. Emission peaks revealed intensity enhancement with increasing concentration of Er₂O₃. The enhancement in oscillator strength for ⁴G_11/2, ⁴G_9/2 states absorption, the high intensity of emission band in the blue region and large refractive index (2.28) makes these glasses prospective for down-conversion solid state violet and blue lasers as well as other photonic devices.

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Infrared and Raman investigation of vitreous antimony trioxide

Abstract

J. Non-Cryst. Solids

J. Noncryst. Solids

J. Am. Chem. Soc.

Z. Kristalloger.

Acta Chem. Scand.

Phys. Chem. Glasses