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Luminescent properties of alumina ceramics doped with manganese and magnesium

机译：氧化铝陶瓷掺杂锰和镁的发光性质

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摘要

Alumina ceramics doped with a different concentration of magnesium and manganese were synthesized at a different annealing temperature and medium. An increase in the dopant concentration leads to an increase in the pulsed cathodoluminescence intensity of impurity centers at 515 nm (Mg) and 678 nm (Mn). The concentration quenching of the luminescence in the 678 nm band occurs for Al2O3:Mn ceramics. The dopants affect the luminescence intensity in the F-center band differently. An increase in the concentration of an impurity from 0.001 to 18.77 wt % in Al2O3:Mn ceramics leads to a 4-fold decrease in the luminescence intensity of the F-center. On the other hand there is a maximum of the luminescence intensity of the F-center for Al2O3:Mg ceramics with a dopant concentration of 1 wt %. The luminescence bands of Cr3+ (687 nm) and most likely F-centers (670 nm) are dominated depending on the excitation energy in photoluminescence spectra of both Al2O3:Mg and Al2O3:Mn ceramics. The low luminescence intensity of the magnesium band (750 nm) is detected upon the excitation in the band of 325 nm. The luminescence bands of Mn2+ (540 nm) and Mn4+ (650 nm) with low intensity are found in the photoluminescence spectrum too.
机译：在不同的退火温度和培养基中合成掺杂有不同浓度的镁和锰的氧化铝陶瓷。掺杂剂浓度的增加导致在515nm（mg）和678nm（Mn）下杂质浓度的脉冲阴极发光强度的增加。对于Al2O3：Mn陶瓷，发生678nm波段中发光的浓度猝灭。掺杂剂不同地影响F中心带中的发光强度。在Al 2 O 3：Mn陶瓷中，杂质浓度从0.001至18.77wt％的增加导致F中心的发光强度的4倍降低。另一方面，Al2O3：Mg陶瓷的F中心的发光强度最大，掺杂剂浓度为1wt％。 Cr3 +（687nm）的发光带和最可能的f中心（670nm）根据Al 2 O 3：Mg和Al 2 O 3：Mn陶瓷的光致发光光谱中的激发能量为主。在325nm的带中的激发时检测镁带（750nm）的低发光强度。在光致发光光谱中发现了低强度的Mn2 +（540nm）和Mn4 +（650nm）的发光带。

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