Combustion synthesis and characterization of phosphor KSr4 (BO3)3:Dy3+

Bajaj, N. S.; Omanwar, S. K.

doi:10.1016/j.optmat.2013.01.025

Cited by 37 publications

(8 citation statements)

References 25 publications

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“…T L i n t e n s i t y o f m a i n p e a k o f o u r NaMgBO 3 :Dy 3+ phosphor is about 95 % intense as compared to that of LiF:MCP, while the intensity of main peak of NaMgBO 3 :Sm 3+ phosphor is about 50 % intense as that of LiF:MCP. Glow curve structure is confirmed by deconvolution of peak by using peak fit software (Bajaj and Omanwar 2013); the obtained peaks are simple and symmetric for both the phosphors NaMgBO 3 :RE (RE = Dy 3+ and Sm 3+ ) as shown in Figs. 4 and 5.…”

Section: Tl Glow Curvementioning

confidence: 68%

“…A variety of BOatomic group are considered to be a dominant factor in their physical properties and a class of phosphors with high-quality performances, especially when doped with proper activators (Nagpure and Omanwar 2012). The main reason of emphasizing on borate is their variety of structure types, transparency to a wide range of wavelengths, high laser damage tolerance, and high optical quality (Bajaj and Omanwar 2013). Combustion synthesis is a good low-cost, one-step, and lowtemperature method for the synthesis of borates, phosphates, and silicates (Khan et al 2015;Bhatkar et al 2002;Thakare et al 2007;Bhatkar et al 2007;Sonekar et al 2007;Sonekar et al 2009).…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and thermoluminescence properties of rare earth-doped NaMgBO3 phosphor

Khan

Ingale

Omanwar

2015

Environ Sci Pollut Res

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Rare earth (Dy(3+) and Sm(3+))-doped sodium magnesium borate (NaMgBO3) is synthesized by solution combustion synthesis method keeping their thermoluminescence properties in mind. The reaction produced very stable crystalline NaMgBO3:RE (RE = Dy(3+), Sm(3+)) phosphors. The phosphors are exposed to (60)Co gamma-ray radiations dose of varying rate from 5 to 25 Gy, and their TL characteristics with kinetic parameters are studied. NaMgBO3:Dy(3+) phosphor shows two peaks for lower doping concentration of Dy(3+) while it reduced to single peak for the higher concentrations of activator Dy(3+). NaMgBO3:Dy(3+) shows the major glow peak around 200 °C while NaMgBO3:Sm(3+) phosphors show two well-separated glow peaks at 200 and 332 °C respectively. The thermoluminescence intensity of these phosphors was compare with the commercially available TLD-100 (Harshaw) phosphor. The TL responses for gamma-ray radiations dose were found to be linear from 5 to 25 Gy for both phosphors while the fading in each case is calculated for the tenure of 45 days.

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Section: Tl Glow Curvementioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Synthesis and thermoluminescence properties of rare earth-doped NaMgBO3 phosphor

Khan

Ingale

Omanwar

2015

Environ Sci Pollut Res

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“…The band at 1182 cm −1 showed the symmetrical stretching vibrations of a B–O bond. Bands at 1025 cm −1 and 836 cm −1 showed the bending vibrations of borate segments. Furthermore, borate deformation and plane bending of the boron–oxygen triangles were expressed by bands at 704 and 676 cm −1 .…”

Section: Resultsmentioning

confidence: 94%

Luminescence study of LiMgBO₃:Dy for γ‐ray and carbon ion beam exposure

Yerpude

Chopra²,

Dhoble³

et al. 2019

Luminescence

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LiMgBO 3 :Dy 3+ , a low Z eff material was prepared using the solution combustion method and its luminescence properties were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), thermoluminescence (TL), photoluminescence (PL), Fourier transform infrared spectroscopy, and electron paramagnetic resonance (EPR) techniques. Reitvield refinement was also performed for the structural studies.The PL emission spectra for LiMgBO 3 :Dy 3+ consisted of two peaks at 478 due to the 4 F 9/2 → 6 H 15/2 magnetic dipole transition and at 572 nm due to the hypersensitive 4 F 9/2 → 6 H 13/2 electric dipole transition of Dy 3+ , respectively. A TL study was carried out for both the γ-ray-irradiated sample and the C 5+ irradiated samples and was found to show high sensitivity for both. Moreover the γ-ray-irradiated LiMgBO 3 :Dy 3+ sample showed linearity in the dose range 10 Gy to 1 kGy and C 5+ -irradiated samples show linearity in the fluence range 2 × 10 10 to 1 × 10 11 ions/cm 2 . In the present study, the initial rise method, various heating rate method, the whole glow curve method, glow curve convolution deconvolution function, and Chen's peak shape method were used to calculate kinetic parameters to understand the TL glow curve mechanism in detail. Finally, an EPR study was performed to examine the radicals responsible for the TL process. KEYWORDS ESR, LiMgBO 3 , tissue equivalent material, trapping parameters | INTRODUCTIONBoron-based materials show interesting thermoluminescence (TL) properties when exposed to ionizing radiation [1,2] . The luminescence properties of lithium borate and magnesium borate in both microcrystalline and nanocrystalline forms have been studied previously [1][2][3][4] . Recently, researchers who studied lithium magnesium borate phosphor found that it was useful for applications in dosimetry [5,6] .To date, only a few studies on LiMgBO 3 have been reported [5] .Recently, the TL properties of rare earth ion (RE = Tb, Gd, Dy, Pr, Mn, Ce, Eu)-doped lithium magnesium borate (LMB), prepared using the solid state diffusion method, have been documented [6] . LMB:Tb 3+ showed the best results with a stable TL peak at 240°C. LMB:Tb 3+ was about four times more sensitive than TLD-100. Optical properties of LMB glasses doped with Dy 3+ ,Sm 3+ ions have been studied [7] .Photoluminescence properties of LMB:Eu and LMB:Eu,Bi have also been studied in detail [8] . LiMgBO 3 :Dy 3+ in its polycrystalline form has been prepared using a novel solution combustion method and its TL sensitivity was found to be half compared with commercial TLD-100 and showed a high degree of fading of 30% after 20 days [9] . Furthermore, LiMgBO 3 :Dy 3+ in its nanocrystalline form has been prepared using the combustion method and its structural and optical properties have been studied [10] .

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“…The method is based on the exothermic reaction between the fuel (urea) and oxidizer (ammonium nitrate). The detailed description of the method regarding the measurement of stoichiometric quantities of fuel and oxidizer is reported in our earlier work [10][11][12][13].…”

Section: Sample Preparationmentioning

confidence: 99%

A Potential Candidate for Lamp Phosphor: Eu³⁺ Activated K₂Y₂B₂O₇

Koparkar

Bajaj

Omanwar

2014

Advances in Optical Technologies

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The novel phosphor K 2 Y 2 B 2 O 7 doped with europium is studied for its photoluminescence properties. The studies show that the phosphor gives strong red emission (PL) at 613 nm related to 5 D 0 -7 F 2 transition of Eu 3+ under the 260 nm excitation (PLE) related to the charge transfer (CT) from the 2p orbital of the O 2− ions to the 4f orbital of Eu 3+ ions with CIE coordinates ( = 0.675; = 0.324). The results of PL and PLE spectra indicate the applicability of K 2 Y 2 B 2 O 7 :Eu as a red component in lamp phosphor. The phosphor is characterized through XRD pattern analysis, and morphology is explained on the basis of SEM image. Optimum concentration of Eu 3+ required for the highest intensity of emission is also studied.

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Combustion synthesis and characterization of phosphor KSr4 (BO3)3:Dy3+

Cited by 37 publications

References 25 publications

Synthesis and thermoluminescence properties of rare earth-doped NaMgBO3 phosphor

Synthesis and thermoluminescence properties of rare earth-doped NaMgBO3 phosphor

Luminescence study of LiMgBO₃:Dy for γ‐ray and carbon ion beam exposure

A Potential Candidate for Lamp Phosphor: Eu³⁺ Activated K₂Y₂B₂O₇

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Combustion synthesis and characterization of phosphor KSr4 (BO3)3:Dy3+

Cited by 37 publications

References 25 publications

Synthesis and thermoluminescence properties of rare earth-doped NaMgBO3 phosphor

Synthesis and thermoluminescence properties of rare earth-doped NaMgBO3 phosphor

Luminescence study of LiMgBO3:Dy for γ‐ray and carbon ion beam exposure

A Potential Candidate for Lamp Phosphor: Eu3+ Activated K2Y2B2O7

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Luminescence study of LiMgBO₃:Dy for γ‐ray and carbon ion beam exposure

A Potential Candidate for Lamp Phosphor: Eu³⁺ Activated K₂Y₂B₂O₇