Synthesis of SrAl<2>O<4>:Dy<3+>/ Eu<2+> green steady persistence fluorescent material
A fluorescent material and long afterglow technology, applied in the direction of luminescent materials, chemical instruments and methods, etc.
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example 1
[0017] a SrAl 2 o 4 : Dy 3+ / Eu 2+ The synthesis of green long afterglow fluorescent material, the preparation method comprises the following steps:
[0018] (1) The rare earth oxide (Dy 2 o 3 and Eu 2 o 3 ) is dissolved in hot nitric acid to form rare earth nitrate;
[0019] (2) Sr 2+ 、Al 3+ 、Dy 3+ and Eu 3+ Measure the rare earth nitrate with a molar ratio of 0.75:2:0.1:0.05, supplement it with deionized water to make the solution reach 100mL, mix well to obtain the mother salt;
[0020] (3) Take by weighing 23.88 g of ammonium bicarbonate, add deionized water to make the solution reach 200mL, and configure a certain concentration of ammonium bicarbonate solution;
[0021] (4) Add the mother salt of step 2 dropwise to the ammonium bicarbonate solution of step 3, after the dropwise addition, react at room temperature for 30 minutes;
[0022] (5) centrifuging, washing and drying the suspension after the reaction in step 4 to obtain a white precursor powder;
[00...
example 2
[0025] The difference between this implementation case and the implementation steps of Example 1 is that the Sr in step (2) 2+ 、Al 3+ 、Dy 3+ and Eu 3 + Molar ratio is changed into 0.7:2:0.2:0.1, and other conditions are all identical with example one.
example 3
[0027] The difference between this implementation case and the implementation steps of Example 1 is that the Sr in step (2) 2+ 、Al 3+ 、Dy 3+ and Eu 3 + Molar ratio is changed into 0.65:2:0.3:0.15, and other conditions are all identical with example one.
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