Preparation method of rare earth doped long afterglow luminescent material
A luminescent material and calcination technology, applied in luminescent materials, chemical instruments and methods, etc., can solve problems such as high energy consumption, and achieve the effect of low energy consumption and low calcination temperature
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[0029] The invention provides a SrAl 2 o 4 :Eu 2+ , Dy 3+ A method for preparing a luminescent material, comprising the steps of:
[0030] Adding the precipitant dropwise to the mixed solution of metal ions to carry out co-precipitation reaction to obtain a flocculent calcined precursor, the mixed solution of metal ions includes Sr 2+ 、Al 3+ 、Eu 2+ and Dy 3+ ;
[0031] Precalcining the flocculent calcined precursor to obtain a luminescent precursor, the temperature of the precalcining being ≥ 100°C;
[0032] The luminescent precursor is calcined to obtain the inorganic long-lasting luminescent material, and the temperature of the calcination is ≤950° C.; the temperature of the pre-calcination is lower than the temperature of the calcination.
[0033] In the present invention, unless otherwise specified, the raw materials used are commercially available products well known to those skilled in the art.
[0034] In the present invention, the precipitant is added dropwise...
Embodiment 1
[0079] according to figure 1 As shown in the process flow, the high-purity raw material SrCO 3 、Al 2 o 3 、Dy 2 o 3 and Eu 2 o 3 Keep the temperature in a constant temperature drying oven at 80° C. for 4 hours to ensure that the raw materials are in a dry state.
[0080] Use an electronic balance (accuracy: 0.0001g) to accurately and quickly weigh each raw material according to the stoichiometric ratio to avoid water absorption by the raw material.
[0081] In the fume hood, the rapidly weighed solid raw material Al 2 o 3 , SrCO 3 、Dy 2 o 3 and Eu 2 o 3 Place them in beakers respectively, add an appropriate amount of concentrated nitric acid in a water bath at 80°C, stir to completely dissolve each solid, continue stirring for 15 minutes, stop heating, cool to room temperature, transfer each metal ion aqueous solution to a volumetric flask, and add deionized water , constant volume, and shake well to obtain a mixed solution of metal ions, in which Al 3+ The molar...
Embodiment 2
[0090] according to figure 1 As shown in the process flow, the high-purity raw material SrCO 3 、Al 2 o 3 、Dy 2 o 3 and Eu 2 o 3 Keep the temperature in a constant temperature drying oven at 80° C. for 4 hours to ensure that the raw materials are in a dry state.
[0091] Use an electronic balance (accuracy: 0.0001g) to accurately and quickly weigh each raw material according to the stoichiometric ratio to avoid water absorption by the raw material.
[0092] In the fume hood, the rapidly weighed solid raw material Al 2 o 3 , SrCO 3 、Dy 2 o 3 and Eu 2 o 3 Place them in beakers respectively, add an appropriate amount of concentrated nitric acid in a water bath at 80°C, stir to completely dissolve each solid, continue stirring for 15 minutes, stop heating, cool to room temperature, transfer each metal ion aqueous solution to a volumetric flask, and add deionized water , constant volume, and shake well to obtain a mixed solution of metal ions, in which Al 3+ The molar...
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