New synthesis of high-quality storage phosphors

Seggern, Heinz von; Hesse, Sabine; Zimmermann, J.; Appleby, G. A.; Fasel, Claudia; Riedel, Ralf

doi:10.1016/j.radmeas.2009.11.027

Cited by 10 publications

(8 citation statements)

References 16 publications

(18 reference statements)

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“…Thus the photoluminescence is about quadratically dependent on the crystallite size (the latter grows quadratically with annealing temperature). An increase in photoluminescence intensity of the Eu 2+ uorescence with increased annealing temperature was previously observed by von Seggern et al 17 for microcrystalline BaFBr:Eu 2+ prepared by high-temperature sintering.…”

Section: Resultssupporting

confidence: 76%

“…The efficiency of an x-ray storage phosphor can be defined as the number of photostimulated luminescence photons generated per incident x-ray photon. 17 The annealed…”

Section: Resultsmentioning

confidence: 99%

“…The efficiency of an X-ray storage phosphor can be dened as the number of photostimulated luminescence photons generated per incident X-ray photon. 17 The annealed samples were x-irradiated by the dental X-ray source for 3.2 s, while the commercial plate was x-irradiated for 0.32 s. The two exposures correspond to $30 and $3 mGy surface doses, respectively. As shown from Fig.…”

Section: Resultsmentioning

confidence: 99%

“…[1][2][3] Various methods have been reported in the literature thereaer, such as nonstoichiometric sintering [13][14][15] and co-precipitation of water based solutions. 16 Recently, von Seggern et al 17 introduced a single step synthesis method by annealing BaCO 3 and ammonium halides with trace amounts of EuF 3 in a reducing atmosphere. They investigated the correlation between the intensity of photoluminescence and photostimulated luminescence with the annealing temperature and reported that the optimal particle size for microcrystalline BaFBr:Eu 2+ is about 5 mm aer annealing at 800 C.…”

Section: Introductionmentioning

confidence: 99%

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Mechanochemical synthesis of an efficient nanocrystalline BaFBr:Eu²⁺ X-ray storage phosphor

Wang

Riesen

2015

RSC Adv.

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A straightforward and direct preparation route for nanocrystalline BaFBr:Eu 2+ by ball-milling is reported. We demonstrate that the as-prepared nanocrystalline powder becomes an efficient photostimulable x-ray storage phosphor upon annealing at temperatures in the range of 400 to 900 o C. The dependence of crystallite size, photoluminescence and storage phosphor properties on annealing temperature and annealing time was investigated and the optimal conditions were determined. After annealing at 900 o C for 1 h, the average crystallite size was found to be ~200 nm; in comparison with the typical ~5 µm crystallites for conventional phosphors. The shape and size distribution of the particles may allow higher packing densities, resulting in higher sensitivities, and resolution in computed radiography. The photostimulable storage properties compare favorably with results obtained for a commercial BaFBr(I):Eu 2+ imaging plate.

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Section: Resultssupporting

confidence: 76%

“…The efficiency of an x-ray storage phosphor can be defined as the number of photostimulated luminescence photons generated per incident x-ray photon. 17 The annealed…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mechanochemical synthesis of an efficient nanocrystalline BaFBr:Eu²⁺ X-ray storage phosphor

Wang

Riesen

2015

RSC Adv.

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“…von Seggern et al reported a single step solid phase synthesis method for high-quality BaFBr:Eu 2+ phosphors by using BaCO 3 , EuF 3 and NH 4 X as reactants. 35,36 Kostova et al fabricated relatively uniform tabular BaFBr:Eu 2+ particles using pin wood as templates. 37 These solid state methods generally require a complicated process, higher temperature and longer reaction time.…”

Section: Introductionmentioning

confidence: 99%

Uniform square-like BaFBr:Eu2+ microplates: controlled synthesis and photoluminescence properties

Liang

Shi

et al. 2012

RSC Adv.

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Luminescence characteristics and X‐ray‐induced defects in BaFBr:Eu²⁺ storage phosphor

Sangeetha

Lakshmanan

Sivakumar³

2023

Luminescence

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Three different approaches used to synthesize a sensitive BaFBr:Eu2+ X‐ray storage photostimulated luminescence (PSL) phosphor at 850°C for 1 h in a reducing atmosphere are reported. The effects of F/Br and Eu concentration on photoluminescence (PL) and PSL sensitivities synthesized by the three approaches were compared. In the first recipe, BaFBr:Eu2+ prepared using a BaF2, BaBr2 and EuF3 mixture using solid‐state diffusion (Recipe I), even in a reducing atmosphere, yielded a low PL and PSL intensity due to oxygen contamination that acted as competing hole traps. When BaFBr:Eu2+ was prepared using ammonium bromide and ammonium fluoride by two different recipes (Recipes II and III), oxygen contamination was eliminated, resulting in enhanced PSL efficiency. The proposed PSL process in BaFBr:Eu2+ was consistent with the experimental results. Increased F/Br molar ratios would incorporate fluorine ion interstitials that act as hole traps accompanied by bromine ion vacancies that act as electron traps. Although two types of F centres, F(Br−) and F(F−) are possible, F(Br−) centres formed during X‐irradiation are only vital for the PSL process. Structural, morphology, and thermoluminescence (TL) properties of the samples were also examined using XRD, field emission scanning electron microscope (FESEM), energy‐dispersive X‐ray spectroscopy (EDAX), and TL studies.

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New synthesis of high-quality storage phosphors

Cited by 10 publications

References 16 publications

Mechanochemical synthesis of an efficient nanocrystalline BaFBr:Eu²⁺ X-ray storage phosphor

Mechanochemical synthesis of an efficient nanocrystalline BaFBr:Eu²⁺ X-ray storage phosphor

Uniform square-like BaFBr:Eu2+ microplates: controlled synthesis and photoluminescence properties

Luminescence characteristics and X‐ray‐induced defects in BaFBr:Eu²⁺ storage phosphor

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New synthesis of high-quality storage phosphors

Cited by 10 publications

References 16 publications

Mechanochemical synthesis of an efficient nanocrystalline BaFBr:Eu2+ X-ray storage phosphor

Mechanochemical synthesis of an efficient nanocrystalline BaFBr:Eu2+ X-ray storage phosphor

Uniform square-like BaFBr:Eu2+ microplates: controlled synthesis and photoluminescence properties

Luminescence characteristics and X‐ray‐induced defects in BaFBr:Eu2+ storage phosphor

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Product

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Mechanochemical synthesis of an efficient nanocrystalline BaFBr:Eu²⁺ X-ray storage phosphor

Mechanochemical synthesis of an efficient nanocrystalline BaFBr:Eu²⁺ X-ray storage phosphor

Luminescence characteristics and X‐ray‐induced defects in BaFBr:Eu²⁺ storage phosphor