Near ultraviolet excited warm white fluorescent powder as well as preparation method and application thereof
A phosphor, warm white light technology, applied in luminescent materials, chemical instruments and methods, electrical components, etc., can solve problems such as excessive blue light, and achieve the effect of solving excessive blue light
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[0032] The present invention also provides a preparation method of the near-ultraviolet excited warm white fluorescent powder described in the above technical solution, comprising the following steps:
[0033] (1) Mix sodium salt, aluminum salt, boron-containing compound and europium-containing compound according to the atomic ratio in the chemical formula of near-ultraviolet excited warm white light phosphor to obtain mixed raw materials;
[0034] (2) Cooling the mixed raw material obtained in the step (1) through the first heating stage, the first heat preservation stage, the second temperature rising stage and the second heat preservation stage successively to obtain a near-ultraviolet excited warm white phosphor; The temperature of the first heat preservation stage is 450-650°C, and the temperature of the second heat preservation stage is 700-900°C.
[0035] The invention mixes sodium salt, aluminum salt, boron-containing compound and europium-containing compound according...
Embodiment 1
[0048] Example 1: Na 2 Al 2 B 2 o 7 Phosphor powder
[0049] Analytical pure sodium carbonate (Na 2 CO 3 ), alumina (Al 2 o 3 ), boric acid (H 3 BO 3 ) is prepared according to the chemical formula ratio of raw materials, and the ratio of raw materials is shown in Table 1.
[0050] Table 1 raw material ratio
[0051] raw material Na 2 CO 3
Al 2 o 3
h 3 BO 3
mass (g) 0.535 0.51 0.62
[0052] Accurately weigh the above raw materials, fully grind them in an agate crucible, mix them evenly, and put them into a ceramic crucible. Put the sample into the muffle furnace according to the set procedure, first rise from room temperature to 650°C for 3 hours after 90 minutes, and then rise to 850°C for 3 hours after 60 minutes. After the calcination process, the sample is cooled to room temperature with the furnace and taken out. After taking it out, grind it into powder with an agate crucible to get Na 2 Al 2 B 2 o 7 Phosphor....
Embodiment 2
[0054] Example 2: Na 1.96 Al 2 B 2 o 7 :0.04Eu phosphor
[0055] Analytical pure sodium carbonate (Na 2 CO 3 ), alumina (Al 2 o 3 ), boric acid (H 3 BO 3 ), europium oxide (Eu 2 o 3 ) is prepared according to the chemical formula ratio of raw materials, and the ratio of raw materials is as shown in Table 2.
[0056] Table 2 raw material ratio
[0057] raw material Na 2 CO 3
[0058] Accurately weigh the above raw materials, fully grind them in an agate crucible, mix them evenly, and put them into a ceramic crucible. Put the sample into the muffle furnace according to the set procedure, first rise from room temperature to 650°C for 3 hours after 90 minutes, and then rise to 850°C for 3 hours after 60 minutes. After the calcination process, the sample is cooled to room temperature with the furnace and taken out. After taking it out, grind it into powder with an agate crucible to get Na 1.96 Al 2 B 2 o 7 : 0.04Eu phosphor.
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