Počet záznamů: 1  

Structural dependence of crystallization in phosphorus-containing sodium aluminoborosilicate glasses

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    SYSNO ASEP0552884
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevStructural dependence of crystallization in phosphorus-containing sodium aluminoborosilicate glasses
    Tvůrce(i) Lu, P. (US)
    Kapoor, S. (IN)
    Kobera, Libor (UMCH-V) RID, ORCID
    Brus, Jiří (UMCH-V) RID, ORCID
    Goel, A. (US)
    Zdroj.dok.Journal of the American Ceramic Society - ISSN 0002-7820
    Roč. 105, č. 4 (2022), s. 2556-2574
    Poč.str.19 s.
    Jazyk dok.eng - angličtina
    Země vyd.US - Spojené státy americké
    Klíč. slovacrystals/crystallization ; glass ; glass-ceramics
    Vědní obor RIVCD - Makromolekulární chemie
    Obor OECDPolymer science
    Způsob publikováníOmezený přístup
    Institucionální podporaUMCH-V - RVO:61389013
    UT WOS000728412500001
    EID SCOPUS85120828069
    DOI10.1111/jace.18256
    AnotaceThe article reports on the structural dependence of crystallization in Na2O–Al2O3–B2O3–P2O5–SiO2-based glasses over a broad compositional space. The structure of melt-quenched glasses has been investigated using 11B, 27Al, 29Si, and 31P magic angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy, while the crystallization behavior has been followed using X-ray diffraction and scanning electron microscopy combined with energy dispersive spectroscopy. In general, the integration of phosphate into the sodium aluminoborosilicate network is mainly accomplished via the formation of Al–O–P and B–O–P linkages with the possibility of formation of Si–O–P linkages playing only a minor role. In terms of crystallization, at low concentrations (≤5 mol.%), P2O5 promotes the crystallization of nepheline (NaAlSiO4), while at higher concentrations (≥10 mol.%), it tends to suppress (completely or incompletely depending on the glass chemistry) the crystallization in glasses. When correlating the structure of glasses with their crystallization behavior, the MAS NMR results highlight the importance of the substitution/replacement of Si–O–Al linkages by Al–O–P, Si–O–B, and B–O–P linkages in the suppression of nepheline crystallization in glasses. The results have been discussed in the context of (1) the problem of nepheline crystallization in Hanford high-level waste glasses and (2) designing vitreous waste forms for the immobilization of phosphate-rich dehalogenated Echem salt waste.
    PracovištěÚstav makromolekulární chemie
    KontaktEva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358
    Rok sběru2023
    Elektronická adresahttps://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.18256
Počet záznamů: 1