Nitrogenous silicate yellow green luminescent material for white light LED (light-emitting diode) and preparation thereof
A technology of luminescent materials and silicates, applied in luminescent materials, chemical instruments and methods, etc., can solve problems such as inconvenience and insecurity, and achieve the effects of improved luminescent performance, simple preparation method and high luminous intensity
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[0023] Example 1 Calcium nitrate (CaN) was weighed according to the molar ratio of Ca:Si:Eu of 1.96:2:0.4 2 O 6 ·4H 2 O), Ethyl orthosilicate (C 8 H 20 O 4 Si) and Europium Nitrate (EuN 3 O 9 ·6H 2 O). First, dissolve calcium nitrate and europium nitrate in a mixture of absolute ethanol and water with a volume ratio of 3:1, stir until the calcium nitrate and europium nitrate are uniformly dissolved, and then adjust the pH of the solution to 2. Add the weighed ethyl orthosilicate into the prepared solution, stir for 2 hours to obtain a clear sol, heat the sol in a water bath at 60°C for 4 hours to obtain a dry colloid, and put the dry gel in a drying box It was dried at 120°C for 12 hours to obtain a precursor. The precursor is ground and calcined in a resistance furnace at 1100°C for 2 hours to obtain Ca 2 SiO 4 :Eu 3+ product. In molar ratio Ca2SiO4: Eu 3+ :Si 3 N 4 Weigh Ca in a ratio of 1:1 2 SiO 4 :Eu 3+ And Si 3 N 4 , Will Ca 2 SiO 4 :Eu 3+ And Si 3 N 4 Mix evenly and put...
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