Raman spectroscopic study of gadolinium(III) in sodium-aluminoborosilicate glasses

Li, Hong; Su, Yali; Li, Liyu; Strachan, Denis M.

doi:10.1016/s0022-3093(01)00878-x

Cited by 94 publications

(99 citation statements)

References 24 publications

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“…Figure 5 shows the Raman spectra and related Gaussian deconvoluted bands of non-crystalline CaO-SiO2-B2O3 within a 400 to 1 600 cm -1 range of Raman shift. These Raman spectra have been identified from appropriate references [34][35][36][37][38][39][40][41] and are listed in Table 2. Owing to the complicated structure of boron oxide, the possibility of a borate structure existing within the CaO-SiO2 system was investigated; and an annular metaborate group, chain-type metaborate group, pyroborate group and six-membered borate ring were all considered in the present study.…”

Section: Effect Of Temperature and Composition On Thermal Conductivitymentioning

confidence: 99%

Relationship between Molten Oxide Structure and Thermal Conductivity in the CaO–SiO2–B2O3 System

Kim

Morita

2014

ISIJ Int.

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Using a transient hot-wire method, the thermal conductivity of the CaO-SiO2-B2O3 mold flux system was measured. The effects of temperature, BO1.5 concentration and basicity on the thermal conductivity were considered, along with structural investigation by Raman spectroscopy. It was found that the addition of boron oxide caused both a decrement and increment of thermal conductivity, depending on the basicity. These conflicting effects on thermal conductivity were considered to be caused by the following two different behaviors in the oxide melts. Boron oxide is incorporated into silicate networks at a lower basicity, while it tends to form borate networks at higher CaO/SiO2 ratios. In the case of basicity dependency, thermal conductivity initially decreases or remains constant with increasing CaO/SiO2 ratio in regions of low basicity, but increases when the CaO/SiO2 ratio is higher than 1.15. Due to the incorporated state of boron oxide in silicate networks at low basicity, the thermal conductivity is likely to be predominantly affected by the silicate networks. However, at a relatively high CaO/SiO2 ratio, an increase in chain-type metaborate was observed through Raman spectroscopy; this structural change in borate being responsible for the increment in thermal conductivity with higher basicity. Finally, the apparent activation energy of thermal conductivity was calculated, and was found to be reduced by the addition of boron oxide.

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Section: Effect Of Temperature and Composition On Thermal Conductivitymentioning

confidence: 99%

Relationship between Molten Oxide Structure and Thermal Conductivity in the CaO–SiO2–B2O3 System

Kim

Morita

2014

ISIJ Int.

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“…Thermal parameters [18][19][20]. Small differences among the microRaman spectra of the glasses, concerning variations b10% in the relative area of the peaks, were observed to be~720 cm −1 ,~1363 cm −1 and 1463 cm − 1 wavenumbers.…”

Section: Samplementioning

confidence: 94%

“…These two last bands were attributed to Raman shift due to stretching in B∅ 2 O − linked to B∅ 4 unit and [B∅ 2 O] − triangles in chain-type arrangements, respectively [21]. The band vibration at~882 cm −1 was attributed to B\∅\B stretching in pyroborate (B 2 ∅ O 4 4 − ) units [18,19,21]. According to Maniu et al [20], pyroborate groups are present in small number from low to high CaO content, but they can still be detected by Raman spectroscopy.…”

Section: Samplementioning

confidence: 97%

Structural, thermal and optical properties of CaBO and CaLiBO glasses doped with Eu3+

Rojas

Souza

Yukimitu

et al. 2014

Journal of Non-Crystalline Solids

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“…A nuclear magnetic resonance (NMR) spectroscopy measurements show that the fraction of boron atoms tetrahedral coordinated to the total number of boron atoms varied with the modifier compositions [8][9][10]. By Raman spectroscopy, typical borate groups, such as boroxol, trigonal and tetrahedral units were found to exist in several borate compounds [11,12]. Recently, we have started to examined the atomic structure of a newly prepared three-component sodium-borosilicate system, using a combination of neutron diffraction (ND), high-energy X-ray diffraction (XRD) and reverse Monte Carlo (RMC) modelling that are capable of building threedimensional structure models and so yield a more detailed description of the atomic-scale glass structure.…”

Section: Introductionmentioning

confidence: 99%

Basic network structure of SiO₂–B₂O₃–Na₂O glasses from diffraction and reverse Monte Carlo simulation

Fábián

Araczki

2016

Phys. Scr.

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Neutron-and high-energy synchrotron X-ray diffraction experiments have been performed on the (75-x)SiO2-xB2O3-25Na2O x=5, 10, 15 and 20 mol% glasses. The structure factor has been measured over a broad momentum transfer range, between 0.4-22 Å -1 . For data analyses and modeling the Fourier transformation and the RMC simulation techniques have been applied. The partial atomic pair correlation functions, the nearest neighbour distances, coordination number distributions and average coordination number values and three-particle bond angle distributions have been revealed. The Si-O network proved to be highly stable consisting of SiO4 tetrahedral units with characteristic distances at rSi-O=1.60 Å and rSi-Si=3.0(5) Å. The behaviour of network forming boron atoms proved to be more complex. The first neighbour B-O distances show two distinct values at 1.30 Å and a characteristic peak at 1.5(5) Å and, both trigonal BO3 and tetrahedral BO4 units are present. The relative abundance of BO4 and BO3 units depend on the boron content, and with increasing boron content the number of BO4 is decreasing, while BO3 is increasing.Keyword: borosilicate glasses, neutron and X-ray diffraction, RMC simulation IntroductionRecently, several experiments have been reported on the study of structure and properties of sodium borosilicate glasses from fundamental and industrial point of view, due to the potential applicability for immobilizing of high-level radioactive wastes, like U-, Pu-, Th-oxides [1-7 and therein]. It has been found that the modifier effect of Na ions influences the ratio of nature of glass network formers Si, B and it is possible to archive a mixed glass network former effect. This effect is believed to have a structural origin, yet a precise understanding of it is still lacking because of the structural complexity of the sodium borosilicate glasses. The structure of borate glasses with alkali oxides has been extensively studied. A nuclear magnetic resonance (NMR) spectroscopy measurements show that the fraction of boron atoms tetrahedral coordinated to the total number of boron atoms varied with the modifier compositions [8][9][10]. By Raman spectroscopy, typical borate groups, such as boroxol, trigonal and tetrahedral units were found to exist in several borate compounds [11,12]. Recently, we have started to examined the atomic structure of a newly prepared three-component sodium-borosilicate system, using a combination of neutron diffraction (ND), high-energy X-ray diffraction (XRD) and reverse Monte Carlo (RMC) modelling that are capable of building threedimensional structure models and so yield a more detailed description of the atomic-scale glass structure. In our previous works we studied the binary sodium silicate glasses (70SiO2-30Na2O) [13], the binary sodium borate glasses (75B2O3-25Na2O) [14] and a five-component sodium borosilicate glass (55SiO2-25Na2O-10B2O3-5BaO-5ZrO2) [15]. Here, we apply the same approach to a ternary

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Raman spectroscopic study of gadolinium(III) in sodium-aluminoborosilicate glasses

Cited by 94 publications

References 24 publications

Relationship between Molten Oxide Structure and Thermal Conductivity in the CaO–SiO2–B2O3 System

Relationship between Molten Oxide Structure and Thermal Conductivity in the CaO–SiO2–B2O3 System

Structural, thermal and optical properties of CaBO and CaLiBO glasses doped with Eu3+

Basic network structure of SiO₂–B₂O₃–Na₂O glasses from diffraction and reverse Monte Carlo simulation

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Raman spectroscopic study of gadolinium(III) in sodium-aluminoborosilicate glasses

Cited by 94 publications

References 24 publications

Relationship between Molten Oxide Structure and Thermal Conductivity in the CaO–SiO2–B2O3 System

Relationship between Molten Oxide Structure and Thermal Conductivity in the CaO–SiO2–B2O3 System

Structural, thermal and optical properties of CaBO and CaLiBO glasses doped with Eu3+

Basic network structure of SiO2–B2O3–Na2O glasses from diffraction and reverse Monte Carlo simulation

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Basic network structure of SiO₂–B₂O₃–Na₂O glasses from diffraction and reverse Monte Carlo simulation