Method for preparing superfine aluminate fluorescent powder
A phosphor and aluminate technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of unstable phosphor performance and incomplete precipitation, and achieve the effects of accurate stoichiometric ratio, complete precipitation and stable process
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[0033] Example 1
[0034] This example uses the co-precipitation method to prepare the blue phosphor Ba for PDP or phosphor 09 Eu 01 MgAl 10 O 17 .
[0035] Weigh Al(NO 3 ) 3 .9H 2 O 1 mole, BaCO 3 0.09 mol, MgO 0.1 mol, Eu 2 O 3 0.05 mol, prepared with deionized water to make a clear mixed metal ion solution, adjust pH=2 with nitric acid; prepare 2mol / L containing NH 4 F 0.005 mole of ammonium bicarbonate solution, and weigh out 0.09 mole (NH4) 2 SO 4 Dissolve in ammonium bicarbonate solution; add the mixed metal ion solution to the ammonium bicarbonate solution at a constant speed, keep the temperature at 30°C, adjust and control pH=9 with ammonia water; continue stirring for 2 hours after the end of the feeding process; stop stirring and stand still Precipitate, discard the supernatant, wash the precipitate once with deionized water, dehydrate, and dry to obtain a fluffy powder; put the dried powder into an alumina crucible and burn it at a temperature of 1500℃ in a weakly reduci...
Example Embodiment
[0036] Example 2
[0037] This example uses the co-precipitation method to prepare green phosphor Ba for PDP 05 Sr 05 MgMn 02 Al 11 O 19 .
[0038] Weigh Al(NO 3 ) 3 .9H 2 O 1.1 mole, BaCO 3 0.05 mole, SrCO 3 0.05 mol, MgO 0.1 mol, MnCO 3 0.02 mol, prepared with deionized water to make a clear mixed metal ion solution, adjust pH=2 with nitric acid; prepare 2mol / L containing NH 4 F 0.005 mole of ammonium bicarbonate solution, and weigh out 0.05 mole (NH4) 2 SO 4 Dissolved in ammonium bicarbonate solution. The remaining conditions are the same as in Example 1.
Example Embodiment
[0039] Example 3
[0040] This example uses the co-precipitation method to prepare the blue phosphor Ba for PDP or phosphor 09 Eu 01 MgAl 10 O 17 .
[0041] Weigh Al(NO 3 ) 3 .9H 2 O 1 mole, BaCO 3 0.09 mol, MgO 0.1 mol, Eu 2 O 3 0.05 mol, prepared with deionized water to make a clear mixed metal ion solution, adjust pH=2 with nitric acid; prepare 2mol / L containing NH 4 F 0.005 mole of ammonium bicarbonate solution, and weigh out 0.09 mole (NH4) 2 SO 4 Dissolve in the ammonium bicarbonate solution; add the mixed metal ion solution to the ammonium bicarbonate solution at a uniform speed and keep the temperature at 40°C. The remaining conditions are the same as in Example 1.
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