Synthesis and thermoluminescence properties of rare earth-doped NaMgBO3 phosphor

Abstract

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.

A Photoluminescence Study of Eu3+, Tb3+, Ce3+ Emission in Doped Crystals of Strontium-Barium Fluoride Borate Solid Solution Ba4−xSr3+x(BO3)4−yF2+3y (BSBF)

“…During the past decades, the luminescence of borates doped with rare earth elements has been intensively analyzed [2][3][4][5][6]. The main areas of their possible exemplification are the components of white light-emitting diodes (WLEDs) required for modern lighting and displays and thermoluminescence phosphors for radiation dosimetry [7,8]. Among the reported borate materials for WLEDs are LiBaBO 3 : Eu 2+ , Tb 3+ , and Eu 3+ , red phosphor with tunable-color emission implying the Eu 2+ →Tb 3+ →Eu 3+ energy transfer [9], LaSc 3 (BO 3 ) 4 :Eu 3+ red phosphor with zero thermal quenching and internal quantum efficiency of 88.3% [4], GdBO 3 : Ce 3+ , Tb 3+ , Eu 3+ broadband-excited red phosphor [10], LiBa 12 (BO 3 ) 4 F 4 : Eu 3+ , Tb 3+ , Ce 3+ single-matrix white phosphor [11].…”

Solution Combustion Synthesis of Iron Oxyborate (Fe3BO6)

“…This technique was mostly used for borate synthesis using different fuels. The Li2B4O7 (20), LiAl7B4O17 (21), NaMgBO3 (22), SrB4O7 (23) and YBO3 (24) were synthesized using urea. The Mg2B2O5 was prepared using both glycine and carbohydrazide (25).…”