Fluorescent powder material for light-emitting diode (LED) lighting and preparation method thereof
A technology for LED lighting and phosphors, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of high production cost, harsh reaction conditions, unsatisfactory process repeatability and product performance stability, etc., to reduce the reaction intensity, The effect of promoting sufficiency and preventing agglomeration effect
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[0028] Example 1
[0029] A preparation method of phosphor material for LED lighting includes the following steps:
[0030] (1)Si 3 N 4 One-stage combustion preparation step of raw material powder, taking silicon powder and Si 3 N 4 , NaN 3 Powder as the raw material, the mass percentage of silicon powder in the raw material is 62.5wt%, Si 3 N 4 The mass percentage of the powder in the raw material is 13wt%, NaN 3 The mass percentage of the powder in the raw material is 15.5wt%; wherein the silicon powder, NaN 3 , Si 3 N 4 The purity of the powder is greater than or equal to 98%, Si 3 N 4 Α-Si3N in powder 4 All Si 3 N 4 The mass percentage of the powder is greater than or equal to 94.6wt%, the rest is β-Si 3 N 4 And a small amount of free Si; mix the above-mentioned raw materials thoroughly and add them to a vacuum high-pressure burner. After vacuuming, pass in nitrogen with a purity of 99% or more, preferably with a nitrogen purity of 99.99% and a charging pressure of 2.0MPa or more...
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[0035] Example 2
[0036] A preparation method of phosphor material for LED lighting includes the following steps:
[0037] (1)Si 3 N 4 One-stage combustion preparation step of raw material powder: take silicon powder and Si 3 N 4 , NaN 3 Powder as the raw material, the mass percentage of silicon powder in the raw material is 68.5wt%, Si 3 N 4 The mass percentage of powder in the raw material is 22wt%, NaN 3 The mass percentage of the powder in the raw material is 9.5% by weight; wherein, the silicon powder, NaN 3 , Si 3 N 4 The purity of the powder is greater than or equal to 98%, Si 3 N 4 Α-Si3N in powder 4 All Si 3 N 4 The mass percentage of the powder is greater than or equal to 94.6wt%; the above-mentioned raw materials are mixed thoroughly and then added to a vacuum high-pressure burner. After vacuuming, nitrogen gas with a purity greater than or equal to 99% is introduced, and the inflation pressure is greater than or equal to 2.0MPa and less than or equal to 2.5MPa. Ti powde...
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[0040] Example 3
[0041] A preparation method of phosphor material for LED lighting includes the following steps:
[0042] (1)Si 3 N 4 One-stage combustion preparation step of raw material powder: take silicon powder and Si 3 N 4 , NaN 3 Powder as the raw material, the mass percentage of silicon powder in the raw material is 65.5wt%, Si 3 N 4 The mass percentage of the powder in the raw material is 17.5wt%, NaN 3 The mass percentage of the powder in the raw material is 17 wt%. Wherein, the silicon powder, NaN 3 , Si 3 N 4 The purity of the powder is greater than or equal to 98%, Si 3 N 4 Α-Si3N in powder 4 All Si 3 N 4 The mass percentage of the powder is greater than or equal to 94.6wt%; the above-mentioned raw materials are mixed thoroughly and then added to a vacuum high-pressure burner. After vacuuming, nitrogen gas with a purity greater than or equal to 99% is introduced, and the inflation pressure is greater than or equal to 2.0MPa and less than or equal to 2.5MPa. Ti powder...
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