Structural, photo, optical and thermal luminescent properties of beta barium metaborate

Iflazoglu, Sera; Yılmaz, Ali Özgür; Bulur, E.

doi:10.1016/j.jallcom.2020.154430

Cited by 5 publications

(1 citation statement)

References 45 publications

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“…Thermoluminescence curves recorded on undoped and Eu-doped chloroborate glass-ceramics are depicted in Figure 8. The glow curve recorded on undoped glass ceramic and BaB2O4 showed a broad band between 75 and 400 °C [42], which was assigned to the thermal recombination of defects within the BaB2O4 nanocrystalline phase. The glow curve recorded on the Eu-doped glass-ceramic (annealed in air) showed two peaks at 97 and 134 °C with a higher magnitude than in the undoped sample, but much weaker than in the Eu 2+ -doped BaCl2 nanocrystalline powder.…”

Section: Thermoluminescence Propertiesmentioning

confidence: 93%

Processing and Optical Properties of Eu-Doped Chloroborate Glass-Ceramic

Secu

2020

Crystals

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An europium doped BaO–B2O3–BaCl2 chloroborate glass-ceramic containing a BaCl2 nanocrystalline phase was produced by melt-quenching followed by glass crystallization during annealing. Structural and morphological investigations using x-ray diffraction and scanning electron microscopy have shown fvBaCl2 nanocrystals of about tens of nm size accompanied by a smaller amount of the BaB2O4 crystalline phase. Photoluminescence spectra have indicated the reduction of Eu3+ to Eu2+ during processing in air or a reducing atmosphere. The spectra analysis showed the presence of Eu3+ ions in the borate glass matrix, while the Eu2+ were incorporated in both the BaCl2 nanocrystals and glass matrix. Thermoluminescence properties were due to the recombination of F(Cl) centers and Eu2+ related hole centers produced by irradiation within the BaCl2 nanocrystals. The color impression of the samples and the photoluminescence quantum efficiency were influenced by the glass processing.

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Section: Thermoluminescence Propertiesmentioning

confidence: 93%