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Structural, physical and thermal properties of lead germanate glasses.

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Title: Structural, physical and thermal properties of lead germanate glasses.
Authors: Sharma, Suruchi1 (AUTHOR), Khanna, Atul1 (AUTHOR) atul.phy@gndu.ac.in, Fábián, Margit2 (AUTHOR)
Source: Journal of Non-Crystalline Solids. Aug2024, Vol. 638, pN.PAG-N.PAG. 1p.
Subjects: Germanate glasses, Crystal glass, Thermal properties, Neutron diffraction, Atomic number, Glass transition temperature, Glass
Abstract: · Study of lead germanate glasses by neutron diffraction, RMC, DSC and Raman analysis. · Density increases while Tg and atomic number density decrease with an increase in PbO mol%. · Ge-O co-ordination essentially tetrahedral and in the range: 3.9 to 4.2(1). · Small amount of GeO 3 and GeO 5 but no GeO 6 units in glass structure. · Pb-O co-ordination decreases from 4.0 to 3.1(1) with increase in PbO mol%. The effects of PbO concentration on the density, thermal and structural properties of xPbO–(100-x)GeO 2 (x = 20 to 55 mol%) glasses were studied. Density of glasses increases linearly from 5.043 to 6.981(5) g·cm−3, while the glass transition temperature decreases drastically from 467 °C to 359 °C on increasing PbO concentration from 20 to 55 mol%. Neutron diffraction studies found that Ge-O co-ordination is in the range: 3.9–4.2(1), and there is a very weak germanate co-ordination anomaly at PbO concentration of 40 and 50 mol%. GeO 4 are the dominant structural units with a small quantity of GeO 3 and GeO 5 but very little GeO 6 in the glass network. Pb-O and O O co-ordination decreases with an increase in PbO mol% and are in the range of: 4.0–3.1(1) and 6.3–5.4(1) respectively. Raman studies indicate a decrease in Pb-O co-ordination with increase in PbO mol%, in good agreement with the neutron diffraction findings. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Non-Crystalline Solids is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 178069318
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  Data: Structural, physical and thermal properties of lead germanate glasses.
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  Data: <searchLink fieldCode="AR" term="%22Sharma%2C+Suruchi%22">Sharma, Suruchi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Khanna%2C+Atul%22">Khanna, Atul</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> atul.phy@gndu.ac.in</i><br /><searchLink fieldCode="AR" term="%22Fábián%2C+Margit%22">Fábián, Margit</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Non-Crystalline+Solids%22">Journal of Non-Crystalline Solids</searchLink>. Aug2024, Vol. 638, pN.PAG-N.PAG. 1p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Germanate+glasses%22">Germanate glasses</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+glass%22">Crystal glass</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+properties%22">Thermal properties</searchLink><br /><searchLink fieldCode="DE" term="%22Neutron+diffraction%22">Neutron diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22Atomic+number%22">Atomic number</searchLink><br /><searchLink fieldCode="DE" term="%22Glass+transition+temperature%22">Glass transition temperature</searchLink><br /><searchLink fieldCode="DE" term="%22Glass%22">Glass</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: · Study of lead germanate glasses by neutron diffraction, RMC, DSC and Raman analysis. · Density increases while Tg and atomic number density decrease with an increase in PbO mol%. · Ge-O co-ordination essentially tetrahedral and in the range: 3.9 to 4.2(1). · Small amount of GeO 3 and GeO 5 but no GeO 6 units in glass structure. · Pb-O co-ordination decreases from 4.0 to 3.1(1) with increase in PbO mol%. The effects of PbO concentration on the density, thermal and structural properties of xPbO–(100-x)GeO 2 (x = 20 to 55 mol%) glasses were studied. Density of glasses increases linearly from 5.043 to 6.981(5) g·cm−3, while the glass transition temperature decreases drastically from 467 °C to 359 °C on increasing PbO concentration from 20 to 55 mol%. Neutron diffraction studies found that Ge-O co-ordination is in the range: 3.9–4.2(1), and there is a very weak germanate co-ordination anomaly at PbO concentration of 40 and 50 mol%. GeO 4 are the dominant structural units with a small quantity of GeO 3 and GeO 5 but very little GeO 6 in the glass network. Pb-O and O O co-ordination decreases with an increase in PbO mol% and are in the range of: 4.0–3.1(1) and 6.3–5.4(1) respectively. Raman studies indicate a decrease in Pb-O co-ordination with increase in PbO mol%, in good agreement with the neutron diffraction findings. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Non-Crystalline Solids is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.jnoncrysol.2024.123068
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Germanate glasses
        Type: general
      – SubjectFull: Crystal glass
        Type: general
      – SubjectFull: Thermal properties
        Type: general
      – SubjectFull: Neutron diffraction
        Type: general
      – SubjectFull: Atomic number
        Type: general
      – SubjectFull: Glass transition temperature
        Type: general
      – SubjectFull: Glass
        Type: general
    Titles:
      – TitleFull: Structural, physical and thermal properties of lead germanate glasses.
        Type: main
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          Name:
            NameFull: Sharma, Suruchi
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            NameFull: Khanna, Atul
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            NameFull: Fábián, Margit
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          Dates:
            – D: 15
              M: 08
              Text: Aug2024
              Type: published
              Y: 2024
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              Value: 638
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