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Physical properties and structural studies of lithium borophosphate glasses containing TeO2

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F19%3A39914932" target="_blank" >RIV/00216275:25310/19:39914932 - isvavai.cz</a>

  • Result on the web

    <a href="https://www.sciencedirect.com/journal/journal-of-solid-state-chemistry/vol/270/suppl/C" target="_blank" >https://www.sciencedirect.com/journal/journal-of-solid-state-chemistry/vol/270/suppl/C</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.jssc.2018.12.006" target="_blank" >10.1016/j.jssc.2018.12.006</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Physical properties and structural studies of lithium borophosphate glasses containing TeO2

  • Original language description

    This work presents a study on the structure, thermal behavior and properties of (100-x)[0.5Li2O-0.1B2O3-0.4P2O3]-xTeO2 glasses prepared within the concentration range of x = 0-80 mol% TeO2 . The structure of the glasses was studied with a combined Raman, 31P and 11B MAS NMR spectroscopy. 31P MAS NMR and Raman spectrum of the pure 50Li2O-10B2O3-40P2O5 glass indicates the co-existence of Q(2) and Q(1) phosphate units in the glass structure. Raman spectra of TeO2 containing glasses revealed that TeO2 is incorporated in the structural network in the form of TeO3 and TeO4 (TeO3+1) units. The ratio of TeO4/TeO3 increases with rising TeO2 content. Apart from the formation of P-O-Te and Te-O-Te bonds, the formation of B-O-Te bonds in the form of mixed tetrahedral units B(OP)(4-n)(OTe)n. also takes place as shown by 11B MAS NMR spectroscopy. The structural studies were correlated with the thermal behavior and physical properties of glasses (density, molar volume, chemical durability and refractive index). DSC studies showed that all glasses crystallize on heating within a temperature region of 400-550 degrees C and the surface nucleation mechanism prevails over the internal one. The crystallization temperature decreases with increasing TeO2 content. The compounds formed by crystallization were LiPO3, Li4P2O7, BPO4 and alpha-TeO2. Glass transition temperature and dilatometric softening temperature, estimated from thermodilatometry curves, decrease with increasing TeO2 content, whereas the thermal expansion coefficient increases.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10402 - Inorganic and nuclear chemistry

Result continuities

  • Project

    <a href="/en/project/GA18-01976S" target="_blank" >GA18-01976S: New prospective phosphate and borophosphate glasses and glass-ceramics</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2019

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Journal of Solid State Chemistry

  • ISSN

    0022-4596

  • e-ISSN

  • Volume of the periodical

    270

  • Issue of the periodical within the volume

    February

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    6

  • Pages from-to

    547-552

  • UT code for WoS article

    000458344900071

  • EID of the result in the Scopus database