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Luminescence sites and spectra of metal doped microwave synthesized Mg2SiO4:Tb
Journal of Luminescence ( IF 3.6 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.jlumin.2020.117635
Y. Zhao , S. Qiao , Y. Wang , X. Wu , D. Poelman , P.D. Townsend

Abstract Terbium doped magnesium orthosilicate (Mg2SiO4: Tb) has been reported as the most efficient thermoluminescence dosimeter material. Further sensitivity improvements of Mg2SiO4: Tb may be achieved by co-doping with other metal ions. Performance is strongly influenced by the sintering conditions, as shown here for Mg2SiO4: Tb samples which were synthesized with microwave thermal processing. A series of Mg2SiO4: x mol% Tb (x = 0.5, 1, 3, 5, 7) and Mg2SiO4: Tb, M (M = Li, Na, Ca, Al, Ga) samples are compared. Photoluminescence (PL) and Thermoluminescence (TL) of all samples are dominated by the characteristic emission of Tb3+. Co-doping can improve the sensitivity, and this is linked to modification of the micro-structure, as revealed by SEM measurements. Among the co-doped samples investigated, Mg2SiO4: Tb, Na shows the highest TL response with the main TL peak at 196oC. Differences between processing with microwave heating and thermal sintering are apparent in terms of the association of the dopants. Benefits and future possibilities with wider applications are discussed.

中文翻译:

金属掺杂微波合成Mg2SiO4:Tb的发光位点和光谱

摘要 掺铽的原硅酸镁 (Mg2SiO4: Tb) 已被报道为最有效的热释光剂量计材料。Mg2SiO4:Tb 的灵敏度进一步提高可以通过与其他金属离子共掺杂来实现。性能受烧结条件的影响很大,如此处所示,使用微波热处理合成的 Mg2SiO4:Tb 样品。比较了一系列 Mg2SiO4: x mol% Tb (x = 0.5, 1, 3, 5, 7) 和 Mg2SiO4: Tb, M (M = Li, Na, Ca, Al, Ga) 样品。所有样品的光致发光 (PL) 和热致发光 (TL) 均以 Tb3+ 的特征发射为主。共掺杂可以提高灵敏度,这与微观结构的改变有关,正如 SEM 测量所揭示的那样。在研究的共掺杂样品中,Mg2SiO4:Tb,Na 显示最高 TL 响应,主要 TL 峰位于 196oC。就掺杂剂的缔合而言,微波加热处理和热烧结处理之间的差异是显而易见的。讨论了更广泛应用的好处和未来的可能性。
更新日期:2020-12-01
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