A kind of self-activated vanadate fluorescent powder and its preparation method and application
A type of vanadate and phosphor technology, which is applied in the field of self-activating vanadate phosphor and its preparation, can solve the problems of low photoelectric conversion efficiency and the like, and achieve the effects of high repeatability and simple synthesis method.
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Embodiment 1
[0032] This embodiment prepares self-activated vanadate Na by sol-gel method 2 YMg 2 V 3 o 12 The sample preparation process is as follows:
[0033] 1) According to the reactant cation molar ratio Na + :Y 3+ :Mg 2+ = 2:1:2 Weigh the raw material Na respectively 2 CO3 (AR)0.2120g, Y(NO 3 ) 3 ·6H 2 O0.7660g, Mg(NO 3 ) 2 ·6H 2 O(AR) 1.0256g, add distilled water and stir to obtain solution A;
[0034] Weigh citric acid 4.2028g and NH 4 VO 3 (AR) 0.7019g, slowly add solution A, stir while adding, until complete reaction, obtain uniform solution A;
[0035] 2) Put the solution into an oven and keep it warm at 60°C for 72 hours to form a uniform transparent colloid, then raise the temperature to 120°C and keep it warm for 12 hours to obtain a brown precursor;
[0036] 3) Fully grind the precursor, pre-calcine at 500°C for 4 hours to obtain a fluffy gray starting material, fully grind the starting material and calcinate at 700°C for 5 hours, cool and grind to obtain a ...
Embodiment 2
[0039] This embodiment prepares self-activated vanadate Na by sol-gel method 2 Y 0.95 Eu 0.05 Mg 2 V 3 o 12 The sample preparation process is as follows:
[0040] 1) According to the reactant cation molar ratio Na + :Y 3+ :Mg 2+ =2:0.95:2 Weigh the raw material Na respectively 2 CO 3 (AR)0.2120g, Y(NO 3 ) 3 ·6H 2 O0.7277g, Mg(NO 3 ) 2 ·6H 2 O(AR) 1.0256g, measure 0.02mol / L of Eu(NO 3 ) 3 Solution 5mL was mixed and stirred to obtain solution A;
[0041] Weigh citric acid 4.2028g and NH 4 VO 3 (AR) 0.7019g, slowly add solution A, stir while adding, until complete reaction, obtain uniform solution B;
[0042] 2) Put solution B in an oven and keep it warm at 70°C for 48 hours to form a uniform transparent colloid, then raise the temperature to 110°C and keep it warm for 36 hours to obtain a brown precursor;
[0043] 3) Fully grind the precursor, pre-calcine at 500°C for 5 hours to obtain a fluffy gray starting material, fully grind the starting material, calci...
Embodiment 3
[0046] This embodiment prepares self-activated vanadate Na by sol-gel method 2 Y 0.9 Eu 0.1 Mg 2 V 3 o 12 The sample preparation process is as follows:
[0047] 1) According to the reactant cation molar ratio Na + :Y 3+ :Mg 2+ =2:0.9:2 Weigh the raw material Na respectively 2 CO 3 (AR)0.2120g, Y(NO 3 ) 3 ·6H 2 O0.6894g, Mg(NO 3 ) 2 ·6H 2 O(AR) 1.0256g, measure 0.02mol / L of Eu(NO 3 ) 3 Solution 10mL was mixed and stirred to obtain solution A;
[0048] Weigh citric acid 4.2028g and NH 4 VO 3 (AR) 0.7019g, slowly add solution A, stir while adding, until complete reaction, obtain uniform solution B;
[0049] 2) Put solution B in an oven and keep it warm at 70°C for 48 hours to form a uniform transparent colloid, then raise the temperature to 110°C and keep it warm for 36 hours to obtain a brown precursor;
[0050] 3) Fully grind the precursor, pre-calcine at 500°C for 5 hours to obtain a fluffy gray starting material, fully grind the starting material, calcina...
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