A kind of eu2+ activated potassium magnesium silicate blue-green fluorescent powder and its preparation method and application
A technology of magnesium potassium silicate and fluorescent powder, which is applied in chemical instruments and methods, luminescent materials, sustainable buildings, etc., to achieve the effects of easy collection of products, reduced energy consumption, and easy operation
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Embodiment 1
[0029] Preparation K 2 Mg 0.997 Eu 0.003 Si 3 o 8
[0030] According to chemical formula K 2 Mg 0.997 Eu 0.003 Si 3 o 8 The stoichiometric ratio of each element in the formula is weighed in K 2 CO 3 : 1.7146 g, MgCO 3 : 1.0428 g, SiO 2 : 2.2360 g, Eu 2 o 3 : 0.0065 g. After grinding and mixing uniformly in an agate mortar, it was first calcined in an air atmosphere at a temperature of 450°C for 3 hours, then cooled naturally to room temperature, and the sample was taken out. Grind and mix the mixture after the first calcination, and then calcine it for the second time in air atmosphere, the calcination temperature is 750°C, and the calcination time is 5 hours, then it is naturally cooled to room temperature, and the sample is taken out. Grind and mix the mixture after the second calcination evenly, and calcine in a reducing atmosphere at a calcination temperature of 950° C. for 10 hours to obtain the target product.
[0031] see Attached picture 1 , which is ...
Embodiment 2
[0036] Preparation K 2 Mg 0.994 Eu 0.006 Si 3 o 8
[0037] According to chemical formula K 2 Mg 0.994 Eu 0.006 Si 3 o 8 The stoichiometric ratio of each element in, respectively weighed KOH: 1.5920 grams, Mg(OH) 2 : 0.8224 g, SiO 2 : 2.5569 grams, Eu(NO 3 ) 3 : 0.0288 g. After grinding and mixing uniformly in an agate mortar, it was first calcined in an air atmosphere at a temperature of 300°C for 5 hours, then cooled naturally to room temperature, and the sample was taken out. Grind and mix the mixture after the first calcination, and then calcine for the second time in an air atmosphere at a calcination temperature of 650°C for 15 hours, then cool naturally to room temperature, and take out the sample. The mixture after the second calcination is ground and mixed evenly, and calcined in a reducing atmosphere at a calcination temperature of 850° C. and a calcination time of 20 hours to obtain the target product. Its main structural properties, luminescence spect...
Embodiment 3
[0039] Preparation K 2 Mg 0.97 Eu 0.03 Si 3 o 8
[0040] According to chemical formula K 2 Mg 0.97 Eu 0.03 Si 3 o 8 The stoichiometric ratio of each element in the formula is weighed in K 2 CO 3 : 1.6534 g, 4MgCO 3 ·Mg(OH) 2 ·5H 2 O: 1.1271 g, SiO 2 : 2.1563 g, Eu 2 o 3 : 0.0632 g. After grinding and mixing uniformly in an agate mortar, it was first calcined in an air atmosphere at a temperature of 250°C for 7 hours, then cooled naturally to room temperature, and the sample was taken out. Grind and mix the mixture after the first calcination, and then calcine for the second time in an air atmosphere, the calcination temperature is 850°C, and the calcination time is 8 hours, then naturally cool to room temperature, and take out the sample. Grind and mix the mixture after the second calcination, and then calcine in a reducing atmosphere at a calcination temperature of 1000°C and a calcination time of 9 hours to obtain the target product. Its main structural pr...
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