Preparation and luminescence characterization of Cu-doped lithium aluminate ceramics within the Li2O-Al2O3 system

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F22%3A00560199" target="_blank" >RIV/61389021:_____/22:00560199 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/22:00560199 RIV/60461373:22310/22:43924908
Result on the web
<a href="https://link.springer.com/article/10.1007/s10971-022-05905-x" target="_blank" >https://link.springer.com/article/10.1007/s10971-022-05905-x</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10971-022-05905-x" target="_blank" >10.1007/s10971-022-05905-x</a>

Result language
angličtina
Original language name
Preparation and luminescence characterization of Cu-doped lithium aluminate ceramics within the Li2O-Al2O3 system
Original language description
Cu+-doped lithium aluminates with LiAlO2, LiAl5O8, and Li5AlO4 stoichiometry were investigated. Tetragonal γ-LiAlO2 and cubic α-LiAl5O8 were prepared in the form of bulk ceramics using the Pechini sol–gel route with Cu-doping concentrations up to 1 mol%. For γ-LiAlO2, single-phase samples were obtained only for the lowest doping concentration tested, which was 0.1 mol%, while α-LiAl5O8 samples were single phase within the full concentration series. Radioluminescence and photoluminescence of Cu-doped γ-LiAlO2 featured only the transition from 3d9 4s1 to 3d10 corresponding to Cu+ ions. On the other hand, Cu-doped α-LiAl5O8 samples showed mainly emissions associated with Fe3+ and Cr3+ impurities with overall very small intensity compared to the reference BGO scintillator. Samples of Cu-doped β-Li5AlO4 were prepared using a nitrates decomposition method. Due to the volatility of Li2O, the samples were not in a single phase and contained a certain amount of secondary γ-LiAlO2 phase, even though excess lithium was used for the sample preparation. Furthermore, samples with β-Li5AlO4 exhibited strong hygroscopic properties, making Li5AlO4 an undesirable host material outside of a controlled atmosphere environment.
Czech name
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Czech description
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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
20501 - Materials engineering

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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