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
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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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
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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
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