Synthesis and characterization of a BaGdF5:Tb glass ceramic as a nanocomposite scintillator for x-ray imaging
| Autor: | Naresh N. Thadhani, Daniel Shedlock, Gyuhyon Lee, Brent K. Wagner, Christian Struebing, Christopher J. Summers, Yong Ding, Zhitao Kang, Alex Bryant, Josh Star-Lack |
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| Rok vydání: | 2016 |
| Předmět: |
Ceramics
Materials science Light Mineralogy Bioengineering Gadolinium 02 engineering and technology Scintillator 01 natural sciences law.invention Annealing (glass) Nanocomposites Crystal Fluorides law 0103 physical sciences General Materials Science Ceramic Electrical and Electronic Engineering Terbium 010302 applied physics Scintillation Glass-ceramic Nanocomposite business.industry Mechanical Engineering X-Rays General Chemistry 021001 nanoscience & nanotechnology Mechanics of Materials Barium visual_art visual_art.visual_art_medium Optoelectronics Nanoparticles Aluminum Silicates 0210 nano-technology business Single crystal |
| Zdroj: | Nanotechnology. 27(20) |
| ISSN: | 1361-6528 |
| Popis: | Transparent glass ceramics with embedded light-emitting nanocrystals show great potential as low-cost nanocomposite scintillators in comparison to single crystal and transparent ceramic scintillators. In this study, cubic structure BaGdF5:Tb nanocrystals embedded in an aluminosilicate glass matrix are reported for potential high performance MeV imaging applications. Scintillator samples with systematically varied compositions were prepared by a simple conventional melt-quenching method followed by annealing. Optical, structural and scintillation properties were characterized to guide the design and optimization of selected material systems, aiming at the development of a system with higher crystal volume and larger crystal size for improved luminosity. It is observed that enhanced scintillation performance was achieved by tuning the glass matrix composition and using GdF3 in the raw materials, which served as a nucleation agent. A 26% improvement in light output was observed from a BaGdF5:Tb glass ceramic with addition of GdF3. |
| Databáze: | OpenAIRE |
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