X-ray photoelectron spectroscopy of sodium phosphate glasses

Gresch, R.; Müller‐Warmuth, W.; Dutz, H.

doi:10.1016/0022-3093(79)90012-7

Cited by 204 publications

(79 citation statements)

References 4 publications

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“…It was found that the P-O bonds to the terminal and to the bridging oxygen atoms change as a function of the P 2 , Na + and K + ). Modifier additions caused further network changes, 5,6) for instance, increasing the number of non-bridging oxygen atoms which coordinated with the modifier cations, and promoting the formation of clusters of MeO n polyhedra. Richard 7) has introduced some new technological applications in the structures of simple phosphate glasses.…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Analysis of the Microstructure of the CaO-P2O5-SiO2 Slag System with Varying P2O5/SiO2 Ratios

Fan

Diao

et al. 2015

Mater. Trans.

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The structures of the CaO-P 2 O 5 -SiO 2 slag system with varying P 2 O 5 /SiO 2 ratios at a fixed CaO content have been investigated by molecular dynamics simulation using the pairwise potential model. The results showed that the average bond lengths of Si-O and P-O were 1.610 « 0.001 ¡ and 1.531 « 0.005 ¡ in the examined range of the P 2 O 5 /SiO 2 ratio. More than 95% Si and P ions were 4-coordinated and formed tetrahedral structures. Average coordination numbers of P-O and Si-O decreased slightly while average coordination number of Ca-O revealed a rising trend with the addition of P 2 O 5 . The non-bridging oxygens (Si-O-Ca and P-O-Ca) were the overwhelming majority and further increased with the substitution of SiO 2 by P 2 O 5 , which results in the decrease of the polymerization constant K p . The numbers of Si and P groups linked to a tagged Si or P tetrahedron (Q n speciation) characterized the polymerization degree of the slag system. The Q 0 of both P and Si declined remarkably with the increase of P 2 O 5 . Correspondingly, () of Si and P increased observably, implying that the polymerization degree of the slag system was enhanced.

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Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Analysis of the Microstructure of the CaO-P2O5-SiO2 Slag System with Varying P2O5/SiO2 Ratios

Fan

Diao

et al. 2015

Mater. Trans.

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“…XPS has also proved to be a useful tool for investigating the structure of oxide glasses [3]. For example, XPS is able to differentiate between bridging oxygen (BO) and non-bridging oxygen atoms (NBO) in the glass structure for binary glasses [4][5][6] as well as more complex systems [7][8][9][10]. Satellite structures associated with the 2p core level peaks of transition metals which have been introduced into oxide glasses have been observed and used qualitatively to identify the oxidation state of the TM ion [11].…”

Section: Introductionmentioning

confidence: 99%

Structure and magnetic properties of vanadium–sodium silicate glasses

Mekki

Khattak

Holland

et al. 2003

Journal of Non-Crystalline Solids

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Vanadium-sodium silicate glasses with the chemical composition [ðV 2 O 5 Þ x (Na 2 O) 0:30 ðSiO 2 Þ 0:70Àx ] ð0:0 6 x 6 0:10Þ have been studied by X-ray photoelectron spectroscopy (XPS) and magnetization measurements. The core-level binding energies of O 1s, V 2p and Si 2p in these glasses have been measured for surfaces produced by in vacuo fracture. The peak position and width of the V 2p 3=2 peak are independent of the V 2 O 5 content while the O 1s core-level spectra show significant composition-dependent changes. Two distinct peaks are resolvable arising from the bridging oxygen and non-bridging oxygen (NBO) atoms in the silicate glasses. The fraction of NBO, determined from these spectra is found to increase with increasing V 2 O 5 content in the glass and are consistent with the formation of predominantly alkali metavanadate species. The magnetic susceptibility data of these glasses indicate a large, temperature-independent diamagnetic contribution arising from the glass matrix as well as small paramagnetic contribution from the V 4þ ions. The V 4þ content deduced from the magnetization results ($2%) is below the detection limit of XPS analysis.

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“…10 The peak at 401.0 (400.1) eV can be ascribed to NH 2 2 CS. 8,9 The O 1s peak at 533.6 (strong, 532.7) eV, which corresponds to phosphorus oxides, 11 was found (not shown here). The intensity of O 1s for Ga oxides which should peak at about 530 eV 10 was weak (shoulder).…”

Section: Xps Analysis Of the Gap(001) Surface Treated By (Nh 2 ) 2 Csmentioning

confidence: 86%

Surface analysis of (NH₂)₂CS‐treated GaP(001) by AES and XPS

Liu

Suzuki

2004

Surface & Interface Analysis

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A GaP(001) surface treated by (NH 2 ) 2 CS/H + solution has been studied by Auger electron spectroscopy (AES) and XPS. The AES result indicates that the GaP(001) surface can be sulfurized by (NH 2 ) 2 CS/H + solution. Oxygen and nitrogen could be almost removed upon annealing at 550• C. The sulfur on the surface is stable below 550• C but a significant amount of carbon is left. XPS spectra of C 1s and N 1s indicate that most of the (NH 2 ) 2 CS molecules are adsorbed molecularly on the surface at RT, which is consistent with the AES result. It is found that sulfur is bonded mainly to Ga atoms and also bonded to phosphorus. The XPS and AES results indicate that gallium and phosphorus oxides, which can be almost removed from the surface at 550• C, exist on the passivated surface.

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X-ray photoelectron spectroscopy of sodium phosphate glasses

Cited by 204 publications

References 4 publications

Molecular Dynamics Analysis of the Microstructure of the CaO-P<sub>2</sub>O<sub>5</sub>-SiO<sub>2</sub> Slag System with Varying P<sub>2</sub>O<sub>5</sub>/SiO<sub>2</sub> Ratios

Molecular Dynamics Analysis of the Microstructure of the CaO-P<sub>2</sub>O<sub>5</sub>-SiO<sub>2</sub> Slag System with Varying P<sub>2</sub>O<sub>5</sub>/SiO<sub>2</sub> Ratios

Structure and magnetic properties of vanadium–sodium silicate glasses

Surface analysis of (NH₂)₂CS‐treated GaP(001) by AES and XPS

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X-ray photoelectron spectroscopy of sodium phosphate glasses

Cited by 204 publications

References 4 publications

Molecular Dynamics Analysis of the Microstructure of the CaO-P<sub>2</sub>O<sub>5</sub>-SiO<sub>2</sub> Slag System with Varying P<sub>2</sub>O<sub>5</sub>/SiO<sub>2</sub> Ratios

Molecular Dynamics Analysis of the Microstructure of the CaO-P<sub>2</sub>O<sub>5</sub>-SiO<sub>2</sub> Slag System with Varying P<sub>2</sub>O<sub>5</sub>/SiO<sub>2</sub> Ratios

Structure and magnetic properties of vanadium–sodium silicate glasses

Surface analysis of (NH2)2CS‐treated GaP(001) by AES and XPS

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Surface analysis of (NH₂)₂CS‐treated GaP(001) by AES and XPS