Method for preparing nitride red phosphor

A technology of red fluorescent powder and nitride, which is applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of unfavorable industrial mass production and practical application requirements, harsh conditions, complicated links, etc., and achieve easy mass production, simple equipment, Equipment requires simple effects

Active Publication Date: 2014-10-08
JIANGSU LUOHUA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods involve active reactants, harsh conditions and complex links, which are not conducive to industrial mass production and practical application requirements.

Method used

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  • Method for preparing nitride red phosphor
  • Method for preparing nitride red phosphor
  • Method for preparing nitride red phosphor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Weigh out CaCN 2 2.400g, SrCO 3 4.207g, Eu 2 o 3 0.528g, Si 3 N 4 7.000g, AlN 0.038g and CaF 2 Add 0.024g of the above raw materials into a beaker and wet mix them with ethanol for 6 hours, put them in an oven and dry them for 24 hours, pass through a 120-mesh sieve, mix evenly, put them into a boron nitride crucible, and bake them at 1100°C in a nitrogen atmosphere for 10 hours. The roasted product was taken out and ground, passed through a 200-mesh sieve, put into a boron nitride crucible, and roasted at 1550°C for 12 hours in a nitrogen atmosphere. The resulting product was ground and sieved, washed with 10% nitric acid, then washed with deionized water and dried to obtain Ca 0.95 Sr 0.95 Si 5 N 8 :Eu 0.1 Nitride red phosphor.

Embodiment 2

[0049] Weigh out CaCN 2 2.160g, SrCO 3 3.986g, Eu 2 o 3 1.056g, Si 3 N 4 7.000g, AlN 0.035g and CaF 2 Add 0.026g of the above raw materials into a beaker and wet mix them with ethanol for 6 hours, put them in an oven to dry for 24 hours, pass through a 120-mesh sieve and mix evenly, put them into a boron nitride crucible, put them into a nitrogen atmosphere and bake them at 1510°C for 10 hours , take out the calcined product, grind it, put it into a boron nitride crucible after passing through a 200-mesh sieve, put it into a nitrogen atmosphere and roast it at 1550°C for 12 hours. The resulting product was ground and sieved, washed with 10% nitric acid, then washed with deionized water and dried to obtain Ca 0.9 Sr 0.9 Si 5 N 8 :Eu 0.2 Nitride red phosphor.

Embodiment 3

[0051] Weigh out CaCN 2 2.040g, SrCO 3 3.764g, Eu 2 o 3 1.584g, Si 3 N 4 7.000g, AlN 0.033g and CaF 2 0.028g Add the above raw materials into a beaker and wet mix them with ethanol for 6 hours, put them in an oven to dry for 24 hours, pass through a 120-mesh sieve and mix evenly, put them into a boron nitride crucible, put them into a nitrogen atmosphere and bake them at 1510°C for 10 hours , take out the calcined product, grind it, put it into a boron nitride crucible after passing through a 200-mesh sieve, put it into a nitrogen atmosphere and roast it at 1550°C for 12 hours. The resulting product was ground and sieved, washed with 10% nitric acid, then washed with deionized water and dried to obtain Ca 0.85 Sr 0.85 Si 5 N 8 :Eu 0.3 Nitride red phosphor.

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Abstract

The invention discloses a method for preparing nitride red phosphor. The chemical structural formula of the nitride red phosphor is (Ca1-xSr1-x)Si5N8:Eu2x, wherein Ca is elemental calcium, Sr is elemental strontium, Si is elemental silicon, N is elemental nitrogen, Eu is elemental europium, and x is more than or equal to 0.05 and less than or equal to 0.20. The requirement of the needed equipment is simple, glove box operation is not needed, no carbon powder is needed for reducing, impurity carbon residues do not exist in the product, the operating process is simplified, batch production is easily realized, and the synthesized target product has the advantages of high luminous efficiency and stable chemical property and does not contain impurity carbon.

Description

technical field [0001] The invention discloses a preparation method of nitride red fluorescent powder mainly used for LED warm white indoor lighting, LED street lamps, LED liquid crystal display backlight sources and other lighting and display. Background technique [0002] Compared with traditional lighting sources, white LEDs have the advantages of low voltage, low energy consumption, and long life, so they have attracted more and more attention at home and abroad. At present, the most common way to obtain white LEDs is to combine blue LED chips with cerium-activated yttrium aluminum garnet yellow phosphor (YAG:Ce) to produce white light. As an important part of LEDs, LED phosphors have become more and more popular in recent years. However, YAG yellow phosphor still has the disadvantages of low luminous efficiency and low color rendering index due to the lack of red luminescent components. Therefore, in order to obtain LED white light with a higher color rendering index, ...

Claims

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Application Information

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IPC IPC(8): C09K11/59
Inventor 罗雪方张亮李颖陶豹陈文娟罗子杰
Owner JIANGSU LUOHUA NEW MATERIAL
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