Europium-doped hydrated zinc molybdate high-efficient red fluorescent powder and preparation method thereof
A technology of hydrated zinc molybdate and red phosphor, which is applied in chemical instruments and methods, luminescent materials, sustainable buildings, etc., can solve the problems of phosphor hardness, long reaction time, and large particle size, and achieves a simple preparation method, Enhanced luminous brightness and easy handling
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Embodiment 1
[0033] Example 2: Weigh Zn(NO 3 ) 2 6H 2 O, (NH 4 ) 6 Mo 7 o 24 4H 2 O, Eu 2 o 3 and Li 2 CO 3 . According to the method similar to Example 1, a phosphor sample added with charge compensator Li was obtained. Its fluorescence spectrum see image 3 , compared with the phosphor powder without charge compensator, the fluorescence intensity is greatly enhanced. Similarly, phosphor samples added with charge compensator K and Na have also been obtained, but the enhancement of fluorescence intensity is not as good as that of Li.
Embodiment 2
[0034] Embodiment 3: according to molar ratio: Zn:Mo:Eu=0.75:1:0.25 takes Zn (NO 3 ) 2 6H 2 O, (NH 4 ) 6 Mo 7 o 24 4H 2 O and Eu 2 o 3 , according to the method similar to Example 1 to obtain a precipitate, then let it stand for 3-5 hours, filter it with suction, dry it, and grind it to obtain a sample. Its emission spectrum see Figure 4 Middle a.
Embodiment 3
[0035] Embodiment 4: according to molar ratio: Zn: Mo: Eu=0.75:1:0.25 takes Zn (NO 3 ) 2 6H 2 O, (NH 4 ) 6 Mo 7 o 24 4H 2 O and Eu 2 o 3 According to the method similar to Example 3, the obtained precipitate was left to stand at room temperature for 12 hours, filtered with suction, dried, and ground to obtain a sample. Its emission spectrum see Figure 4 middle d.
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