Europium-doped barium magnesium niobate red fluorescent powder and preparation method thereof
A technology of red fluorescent powder and barium magnesium niobate, which is applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as shortage, and achieve the effects of uniform particle size, good color purity, and high chemical stability
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Embodiment 1
[0028] 1) Prepare peroxygen-Nb-citric acid solution: weigh 0.02mol Nb at a molar ratio of 1:20 2 o 5 and 0.4mol KOH, mixed and ground, poured into a crucible, heated up to 550°C at a rate of 5°C per minute, kept for 2.5h, slowly added water to dissolve, transferred to a beaker and stood for a day and a night, filtered to take the supernatant, and added Adjust the pH value to 1-2 with hydrochloric acid, let it stand for a period of time, add ultrapure water to filter, and completely remove Cl -1 , to get niobate colloid (Nb 2 o 5 ·5H 2 O), then follow Nb:citric acid:H 2 o 2 =1:4:10 ratio of citric acid and hydrogen peroxide were added sequentially, and the volume was adjusted to 200ml with ultrapure water, heated and stirred at 65°C for 5-10h, evaporated and concentrated to 100ml, and peroxy-Nb-citric acid solution was obtained. Weigh an appropriate amount of precursor solution, calcined, and determine the actual content of Nb;
[0029] 2) Take an appropriate amount of e...
Embodiment 2
[0033] 1) Prepare peroxygen-Nb-citric acid solution: weigh 0.02mol Nb at a molar ratio of 1:20 2 o 5 and 0.4mol KOH, mixed and ground, poured into a crucible, heated up to 550°C at a rate of 5°C per minute, kept for 2.5h, slowly added water to dissolve, transferred to a beaker and stood for a day and a night, filtered to take the supernatant, and added Adjust the pH value to 1-2 with hydrochloric acid, let it stand for a period of time, add ultrapure water to filter, and completely remove Cl -1 , to get niobate colloid (Nb 2 o 5 ·5H 2 O), then follow Nb:citric acid:H 2 o 2 =1:4:10 ratio of citric acid and hydrogen peroxide were added sequentially, and the volume was adjusted to 200ml with ultrapure water, heated and stirred at 65°C for 5-10h, evaporated and concentrated to 100ml, and peroxy-Nb-citric acid solution was obtained. Weigh an appropriate amount of precursor solution, calcined, and determine the actual content of Nb;
[0034] 2) Take an appropriate amount of e...
Embodiment 3
[0038] 1) Prepare peroxygen-Nb-citric acid solution: weigh 0.02mol Nb at a molar ratio of 1:20 2 o 5 and 0.4mol KOH, mixed and ground, poured into a crucible, heated up to 550°C at a rate of 5°C per minute, kept for 2.5h, slowly added water to dissolve, transferred to a beaker and stood for a day and a night, filtered to take the supernatant, and added Adjust the pH value to 1-2 with hydrochloric acid, let it stand for a period of time, add ultrapure water to filter, and completely remove Cl -1 , to get niobate colloid (Nb 2 o 5 ·5H 2 O), then follow Nb:citric acid:H 2 o 2 =1:4:10 ratio of citric acid and hydrogen peroxide were added sequentially, and the volume was adjusted to 200ml with ultrapure water, heated and stirred at 65°C for 5-10h, evaporated and concentrated to 100ml, and peroxy-Nb-citric acid solution was obtained. Weigh an appropriate amount of precursor solution, calcined, and determine the actual content of Nb;
[0039] 2) Take an appropriate amount of e...
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