Processing and Optical Properties of Eu-Doped Chloroborate Glass-Ceramic
An europium doped BaO–B<sub>2</sub>O<sub>3</sub>–BaCl<sub>2</sub> chloroborate glass-ceramic containing a BaCl<sub>2</sub> nanocrystalline phase was produced by melt-quenching followed by glass crystallization during annealing. Structural and morpholog...
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MDPI AG
2020-12-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/10/12/1101 |
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| author | Mihail Secu Corina Elisabeta Secu |
| author_facet | Mihail Secu Corina Elisabeta Secu |
| author_sort | Mihail Secu |
| collection | DOAJ |
| description | An europium doped BaO–B<sub>2</sub>O<sub>3</sub>–BaCl<sub>2</sub> chloroborate glass-ceramic containing a BaCl<sub>2</sub> 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 fvBaCl<sub>2</sub> nanocrystals of about tens of nm size accompanied by a smaller amount of the BaB<sub>2</sub>O<sub>4</sub> crystalline phase. Photoluminescence spectra have indicated the reduction of Eu<sup>3+</sup> to Eu<sup>2+</sup> during processing in air or a reducing atmosphere. The spectra analysis showed the presence of Eu<sup>3+</sup> ions in the borate glass matrix, while the Eu<sup>2+</sup> were incorporated in both the BaCl<sub>2</sub> nanocrystals and glass matrix. Thermoluminescence properties were due to the recombination of F(Cl) centers and Eu<sup>2+</sup> related hole centers produced by irradiation within the BaCl<sub>2</sub> nanocrystals. The color impression of the samples and the photoluminescence quantum efficiency were influenced by the glass processing. |
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| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T14:24:06Z |
| publishDate | 2020-12-01 |
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| record_format | Article |
| series | Crystals |
| spelling | doaj.art-3f87ab3245c94332ad0eebd0f13491ce2023-11-20T23:06:03ZengMDPI AGCrystals2073-43522020-12-011012110110.3390/cryst10121101Processing and Optical Properties of Eu-Doped Chloroborate Glass-CeramicMihail Secu0Corina Elisabeta Secu1National Institute of Materials Physics, 077125 Magurele, RomaniaNational Institute of Materials Physics, 077125 Magurele, RomaniaAn europium doped BaO–B<sub>2</sub>O<sub>3</sub>–BaCl<sub>2</sub> chloroborate glass-ceramic containing a BaCl<sub>2</sub> 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 fvBaCl<sub>2</sub> nanocrystals of about tens of nm size accompanied by a smaller amount of the BaB<sub>2</sub>O<sub>4</sub> crystalline phase. Photoluminescence spectra have indicated the reduction of Eu<sup>3+</sup> to Eu<sup>2+</sup> during processing in air or a reducing atmosphere. The spectra analysis showed the presence of Eu<sup>3+</sup> ions in the borate glass matrix, while the Eu<sup>2+</sup> were incorporated in both the BaCl<sub>2</sub> nanocrystals and glass matrix. Thermoluminescence properties were due to the recombination of F(Cl) centers and Eu<sup>2+</sup> related hole centers produced by irradiation within the BaCl<sub>2</sub> nanocrystals. The color impression of the samples and the photoluminescence quantum efficiency were influenced by the glass processing.https://www.mdpi.com/2073-4352/10/12/1101glass ceramicnanocrystalsrare earthphotoluminescencethermoluminescence |
| spellingShingle | Mihail Secu Corina Elisabeta Secu Processing and Optical Properties of Eu-Doped Chloroborate Glass-Ceramic Crystals glass ceramic nanocrystals rare earth photoluminescence thermoluminescence |
| title | Processing and Optical Properties of Eu-Doped Chloroborate Glass-Ceramic |
| title_full | Processing and Optical Properties of Eu-Doped Chloroborate Glass-Ceramic |
| title_fullStr | Processing and Optical Properties of Eu-Doped Chloroborate Glass-Ceramic |
| title_full_unstemmed | Processing and Optical Properties of Eu-Doped Chloroborate Glass-Ceramic |
| title_short | Processing and Optical Properties of Eu-Doped Chloroborate Glass-Ceramic |
| title_sort | processing and optical properties of eu doped chloroborate glass ceramic |
| topic | glass ceramic nanocrystals rare earth photoluminescence thermoluminescence |
| url | https://www.mdpi.com/2073-4352/10/12/1101 |
| work_keys_str_mv | AT mihailsecu processingandopticalpropertiesofeudopedchloroborateglassceramic AT corinaelisabetasecu processingandopticalpropertiesofeudopedchloroborateglassceramic |