Fabrication and scintillation properties of Pr:Lu.sub.3./sub.Al.sub.5./sub.O.sub.12./sub. transparent ceramics from co-precipitated nanopowders

0533013 - FZÚ 2021 RIV NL eng J - Článek v odborném periodiku
Hu, Z.W. - Chen, X.-P. - Liu, X. - Li, X.-Y. - Xie, T.-F. - Shi, Y. - Kou, H. - Pan, Y.B. - Mihóková, Eva - Nikl, Martin - Li, J.
Fabrication and scintillation properties of Pr:Lu₃Al₅O₁₂ transparent ceramics from co-precipitated nanopowders.
Journal of Alloys and Compounds. Roč. 818, Mar (2020), s. 1-9, č. článku 152885. ISSN 0925-8388. E-ISSN 1873-4669
Grant CEP: GA ČR GA16-15569S
Grant ostatní: AV ČR(CZ) CAS-17-02
Program: Bilaterální spolupráce
Institucionální podpora: RVO:68378271
Klíčová slova: Pr:LuAG transparent ceramics * co-precipitation method * nonstoichiometry * scintillation properties
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 5.316, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.jallcom.2019.152885

In this work, 0.25 at%Pr:Lu3Al5O12 transparent ceramics were prepared from the coprecipitated nanopowders without any sintering aids. Ammonium hydrogen carbonate was used as precipitant and the influences of precipitant to metal ions molar ratio on nanopowders and ceramics were investigated. Excessive or insufficient precipitant will worsen the phase-purity and dispersity of the nanopowders. The nonuniform dissolution of the Lu and Al precipitants in the titration and washing process, which results in the nonstoichiometry of Al excess in the ceramics and deteriorates the optical quality. After optimizing the ratio of Lu/Al in raw powders, Pr:Lu3Al5O12 ceramics with the in-line transmittance above 80% in the visible band were obtained. The light yield is 7086 Ph/MeV and the energy resolution is 16.9% which is inferior to that of the good Pr:Lu3Al5O12 crystal. The low valent cation impurities in the raw material increase the concentration of Pr4+ and diminish the light yield.

Trvalý link: http://hdl.handle.net/11104/0311515