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- W2999875428 abstract "Abstract Tetra‐valent manganese (Mn 4+ ) has been regarded as an efficient non‐rare‐earth red‐light emitting ion, which has stimulated continued search of robust hosts and efficient synthetic methods to stabilize Mn 4+ centers with strong photoluminescence. In this work, we demonstrate a facile synthetic method for Mn 4+ doped glass‐ceramic (GC) based on crystallization‐induced oxidation state change in an oxide glass. The parent glass with a formula of LiNaGe 4 O 9 is fabricated by melt‐quenching and crystallization is induced by thermal treatment in air. Oxidation of Mn 2+ in glass to Mn 4+ in the GC is confirmed by both optical spectroscopy and electron paramagnetic resonance (EPR) measurements. After thermal treatment, the characteristic reddish photoluminescence (PL) of Mn 2+ in the glass centered at 611 nm disappears and a strong photoluminescence peak at 660 nm attributed to Mn 4+ is observed. The conversion to Mn 4+ after crystallization in the examined system may have strong implications for synthesis of Mn 4+ doped phosphors which always requires rigorous control of the redox equilibrium during synthesis." @default.
- W2999875428 created "2020-01-23" @default.
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- W2999875428 date "2020-01-21" @default.
- W2999875428 modified "2023-10-09" @default.
- W2999875428 title "Crystallization‐induced valence state change of Mn <sup>2+</sup> → Mn <sup>4+</sup> in LiNaGe <sub>4</sub> O <sub>9</sub> glass‐ceramics" @default.
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- W2999875428 doi "https://doi.org/10.1111/jace.17006" @default.
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