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Tuesday, August 11, 2020 | History

2 edition of Vibrational spectroscopic studies of some lead silicate glasses. found in the catalog.

Vibrational spectroscopic studies of some lead silicate glasses.

Clive Anthony Worrell

Vibrational spectroscopic studies of some lead silicate glasses.

by Clive Anthony Worrell

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Published by University of Salford in Salford .
Written in English


Edition Notes

PhD thesis, Chemistry.

SeriesD11844/75
ID Numbers
Open LibraryOL20308737M

Request PDF | Mixed barium‐lead borate glasses studied by optical and vibrational spectroscopy | Glasses of the ternary lead‐barium borate series (70‐x) B2O3 – 30 BaO – x PbO with x= 0. Normal coordinate calculations have been carried out on partially polymerized simple silicate crystals, including Li and Na di- and metasilicates, Li and Gd pyrosilicates, thortveitite and rankinite. In the antisymmetric Si-O stretching modes which are active at – cm−1 in infrared spectra, Si-Obr vibrations occur at higher frequencies than Si-Onb vibrations if the bonds have.

Glasses of the ternary lead‐barium borate series (70−x) B 2 O 3 –30 BaO–xPbO with x = to 30 mol% were studied for their optical properties by photoluminescence (PL) and UV‐Vis absorption spectroscopy. Variations in the s‐p transition of Pb 2+ were followed as variations of the lead content and varying optical basicities of the glass. The UV cutoff of the undoped glass sample. The crystallization process of some glasses in the ternary Na2O–SiO2–PbO system with good chemical stability that can be used for waste inertization was studied using X-ray diffraction (XRD), infrared spectroscopy (FT-IR), differential thermal analysis (DTA) and scanning electron microscopy. The parent glasses were characterized by XRD and FT-IR, and their vitreous state was determined.

  Raman spectroscopic study of some lead phosphate glasses with tungsten ions. Journal of Non-Crystalline Solids , (), DOI: /ysol Abstract. Infrared and near-infrared transmission spectra have been taken on 19 volcanic and synthetic silicate glasses with known H_2O contents (– wt. %). Absorption pea.


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Vibrational spectroscopic studies of some lead silicate glasses by Clive Anthony Worrell Download PDF EPUB FB2

Journal of Non-Crystalline Solids 29 () O North-Holland Publishing Company VIBRATIONAL SPECTROSCOPIC STUDIES OF SOME LEAD SILICATE GLASSES C.A.

WORRELL and T. HENSHALL Department of Chemistry and Applied Chemistry, University of Salford, Salford M5 4WT, England Received 23 June Revised manuscript received 5 January * Cited by: Three phases crystallize in lead metasilicate glass, depending on the time and temperature, the stable alamosite, and the metastable H-PS and L-PS.

This study of lead metasilicate glass by in-situ Raman spectroscopy provided a detailed description of the crystallization pathways, clarifying some of its alleged : R.B.

Pena, D.V. Sampaio, D.V. Sampaio, R.F. Lancelotti, T.R. Cunha, E.D. Zanotto, P.S. Pizani. C.A. Worrell, T. Henshall, Vibrational spectroscopic studies of some lead silicate glasses, Journal of Non-Crystalline Solids, /(78), 29, 3, (), ().

Crossref GEORGE H. SIGEL, Optical Absorption of Glasses, Glass I: Interaction with Electromagnetic Radiation - Treatise on Materials Science and Technology, 10 Cited by: Vibrational spectroscopic studies of some lead silicate glasses. Journal of Non-Crystalline Solids29 (3), DOI: /(78) J.

Bucaro, L. Flax. Application of acoustic surface waves to the study of surface properties of ion‐exchanged by: Raman spectroscopy of glasses and melts is a powerful technique which can provide information about the silicate network connectivity via the study of Q n-species distribution and also on other tetrahedrally coordinated cations such as aluminium, phosphorus, ferric iron and ly, Raman spectroscopy of glasses and melts has focused on information obtained about the speciation of.

spectroscopy to probe the structures of silicate glasses and melts, which are summarized in Table l. This article is intended to review these studies for alkati and alkaline earth silicate systems.

The initial section discusses in detail the experimental observations for the ensemble of Raman studies of simple silicate glasses and melts.

This. The structure of xWO 3 ( − x)[2P 2 O 5 PbO] glass system with 0 ⩽ x ⩽ 50 mol% was investigated by Raman spectroscopy. The characteristic bands of these glasses due to the stretching and bending vibrations were identified and analyzed by the increasing of WO 3 content.

This fact allowed us to identify the specific structural units which appear in these glasses and thus to point. Fig. 1 presents the set of Raman spectra taken from binary sodium silicate glasses with different amount of sodium.

The spectra are vertically shifted in order to avoid their overlapping for sake of better visibility. The dominant band located around cm −1 corresponds to the oxygen breathing vibrations of the Si O Si linkage within large rings of SiO 4 tetrahedra in the glass framework. The FT-IR and FT-Raman spectra of three-layered silicates, magadiite, kenyaite, and ilerite have been measured.

The correlation between vibrational spectra and the structural properties of silicates under investigation has been made. The unit cells of all three silicates appear to be centrosymmetric since the mutual exclusion rule applies. The factor group symmetries of magadiite and ilerite. The polarized Raman spectra and infrared powder absorption spectra for PbO xSiO2 glasses, with ⩽x⩽2, were measured and interpreted in terms of the structure of the glasses.

Comparison of the spectra of the glasses with the spectra of numerous stable and metastable crystalline phases was also made. It was found that the glasses are composed of a number of silicate species. Raman spectroscopic studies of alkali and alkaline earth silicate glasses and melts are reviewed, and the major Raman bands observed for these series are summarized.

Vitreous silica shows weak bands near and cm −1, a medium intensity band group. W R Taylor, Application of infrared spectroscopy to studies of silicate glass structure: Examples from the melilite glasses and the systems Na2O-SiO2 and Na2O-Al2O3-SiO2, Journal of Earth System Science, /BF, 99, 1, (), ().

40PbO–(10 − x)PbF 2 –50 SiO 2:xWO 3 (where x = 1 to 7 mol%) glasses are prepared in the glass forming region. Spectroscopic studies (UV–Vis absorption, ESR, IR) are carried out for these glasses.

Interesting changes are observed in the spectroscopic parameters of these glasses when the concentration of WO 3 is changing in the glass matrix. Two absorption bands are observed around at.

Structural Studies of Silicate Glasses and Melts-Applications and Limitations of Raman Spectroscopy Article (PDF Available) in American Mineralogist 69(6) July with Reads. A series of lead silicate glasses, spanning the broadest reported range of lead contents (up to 83 mol% PbO), were prepared, on which the following spectroscopic observations were made: 29 Si.

Parallel‐ and perpendicular‐polarized Raman and KBr pellet transmission IR spectra of quenched 10K 2 O‐50SiO 2 ‐nR 2 O 3 (R = La, Gd, Yb; n = 0, 1, 5, 10 mol) glasses are presented.

Increasing lanthanide oxide concentration produces partially‐polarized high‐frequency bands at, and cm −1, assigned to the symmetric stretching modes of SiO 4 tetrahedra containing 1, 2.

on the same glass composition to bring complementary information between macroscopic properties and nano-structural changes investigated by Raman spectroscopy. In the different works on lead silicate glass referenced in this study, the glass synthesis were performed from reagent grades PbO and SiO 2 or Pb 3 O 4 and SiO 2 (as indicated by.

The vibrational interactions of oxide tetrahedra and the correlation off vibrational bands with structural entities in variously polymerized idealized silicate structural units have been investigated with normal-coordinate calculations.

Raman and infrared intensities as well as frequencies were calculated, yielding good qualitative agreement with observed glass and crystal spectra. Mainly XRD, vibrational spectroscopic and nuclear magnetic resonance (NMR) study of lead silicate glasses.

29Si environment in 2 glasses containing of PbSP30 glass consists of one sharp peak with some shoulders in the low frequency region and in the high.

Infrared and near-infrared transmission spectra have been taken on 19 volcanic and synthetic silicate glasses with known H2O contents (– wt. Absorption peaks were observed at wavelengths of μm, μm, μm, μm, and μm.

These peaks have been attributed to the first overtone of the OH stretching vibration, the combination stretching+bending mode of H2O. Such a conclusions were possible on the base of our earlier spectroscopic studies of NaCaPO 4 -SiO 2 [9, 11] and KCaPO 4 -SiO 2 glasses [12], as well as the studies of model matrix and disperse.Application of infrared spectroscopy to studies of silicate glass structure: Si ordering may lead to very different vibrational have shown some promise in providing an overall picture of silicate melts and glasses, emphasizing the need to.MoO 3-Doped Lead Borate Glasses.

The structural studies of MoO 3-doped Pb 2 O 3-B 2 O 3 glasses by IR spectra show various absorption bands which are characteristics of different vibrational modes. The absorption band is at cm −1 which indicates the presence of BO 3 or boroxol groups in glass system containing 80% PbO and 20% B 2 O absorption bands ranges from to .