Method for synthesizing green light fluorescent powder LaPO4:Ce3+,Tb3+
A synthesis method and technology of phosphor powder, applied in chemical instruments and methods, luminescent materials, etc., can solve the problem of low luminous efficiency of green powder, and achieve the effects of reducing energy consumption, inhibiting oxidation, and reducing reaction temperature
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Embodiment 1
[0021] Synthetic La 0.85 PO 4 :0.1Ce 3+ , 0.05Tb 3+ green powder. Lanthanum nitrate La(NO 3 ) 3 ·6H 2 O (0.662 g, 1.5 mmol), cerium nitrate Ce (NO 3 ) 3 ·6H 2 O (0.078 g, 0.18 mmol), terbium nitrate Tb (NO 3 ) 3 ·6H 2 O (0.041 g, 0.09 mmol) was dissolved in 180 mL of water. Therefore, Ce in the above solution 3+ and Tb 3+ The relative concentrations were 0.1 and 0.05, respectively, and the total molar concentration of nitrate was 0.01 mol / liter. Add trisodium phosphate Na to the above solution 3 PO 4 (0.295 g, 1.8 mmol), stirred for 10 minutes. Then add 0.056 gram of 80% hydrazine hydrate solution by mass percentage, that is, its molar number is 0.5 times of the total molar number of nitrates. Put the above prepared solution into the polytetrafluoroethylene inner lining of the autoclave, the filling degree is 90%, and the inner lining volume is 200 milliliters. The solution was treated at 120°C for 100 hours, and the treated solution was centrifuged and drie...
Embodiment 2
[0023] Synthetic La 0.4 PO 4 :0.4Ce3+ , 0.2Tb 3+ green powder. Lanthanum nitrate La(NO 3 ) 3 ·6H 2 O (2.771 g, 6.4 mmol), cerium nitrate Ce (NO 3 ) 3 ·6H 2 O (2.778 g, 6.4 mmol), terbium nitrate Tb (NO 3 ) 3 ·6H 2 O (1.450 g, 3.2 mmol) was dissolved in 160 mL of water, therefore, Ce in the above solution 3+ and Tb 3+ The relative concentrations are 0.4 and 0.2 respectively, and the total molar concentration of nitrate is 0.1 mol / liter. Add sodium acid phosphate Na to the above solution 2 HPO 4 (2.272 g, 0.016 mol), stirred for 10 minutes. Then add 10 grams of hydrazine hydrate solution with a mass percentage of 80%, that is, the number of moles thereof is 10 times that of the total moles of nitrates. Put the above prepared solution into the polytetrafluoroethylene lining of the autoclave, the filling degree is 80%, and the lining volume is 200 milliliters. The solution was treated at 200°C for 20 hours, and the treated solution was centrifuged and dried to obt...
Embodiment 3
[0025] Synthetic La 0.1 PO 4 :0.6Ce 3+ , 0.3Tb 3+ green powder. Lanthanum nitrate La(NO 3 ) 3 ·6H 2 O (0.779 g, 1.8 mmol), cerium nitrate Ce (NO 3 ) 3 ·6H 2 O (4.687 g, 0.011 mol), terbium nitrate Tb (NO 3 ) 3 ·6H 2 O (2.446 g, 5.4 mmol) was dissolved in 90 mL of water, therefore, Ce in the above solution 3+ and Tb 3+ The relative concentrations were 0.6 and 0.3, respectively, and the total molar concentration of nitrate was 0.2 mol / liter. Add acid ammonium phosphate (NH 4 ) 2 HPO 4 (2.376 g, 0.018 mmol), stirred for 10 minutes. Then add 22.5 grams of 80% hydrazine hydrate solution, that is, its molar number is 20 times of the total molar number of nitrates. Put the above prepared solution into the polytetrafluoroethylene inner lining of the autoclave, the filling degree is 90%, and the inner lining volume is 100 milliliters. The solution was treated at 250°C for 4 hours, and the treated solution was centrifuged and dried to obtain LaPO 4 : Ce 3+ , Tb 3+ ...
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