Fluorescent powder using silicon-aluminum base nitrogen oxides as base materials and preparation method thereof

A nitrogen oxide and phosphor technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of limited development, high temperature, complex preparation method of nitride phosphors, etc., to achieve optimized performance, reduced calcination temperature, high thermal stability Effects of sex and chemical stability

Inactive Publication Date: 2010-07-21
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method of nitride phosphor is complicated, usually requires high temperature and high pressure, which limits

Method used

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  • Fluorescent powder using silicon-aluminum base nitrogen oxides as base materials and preparation method thereof
  • Fluorescent powder using silicon-aluminum base nitrogen oxides as base materials and preparation method thereof
  • Fluorescent powder using silicon-aluminum base nitrogen oxides as base materials and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Sr 4.88 Li 2 al 2 Si 2 N 2 o 10 :0.12Eu 2+ Synthesis of phosphors.

[0040] Take by weighing 7.1 grams of strontium carbonate (purity 99%), 0.71 grams of lithium carbonate (purity 99%), 0.3 grams of silicon dioxide (purity 99%), 1.05 grams of aluminum oxide (purity 99%), 0.7 gram of silicon nitride (purity 99%) and 0.21 gram of europium oxide (purity 99.9%), the weighed raw materials are placed in an agate jar, and the powder is finely ground and mixed uniformly by grinding.

[0041] Then put the mixed raw materials in the corundum crucible, in the high temperature resistance furnace, H 2 / N 2 (5% / 95%) under the roasting atmosphere, in the high-temperature tube furnace, be heated to 1350 ℃ with the heating rate of 300 ℃ / hour, and keep 5 hours at this temperature, then slowly cool to room temperature; The sample of cooling is again Grind into a powder by a ball mill, put it into a graphite crucible, and 2 / N 2 (5% / 95%) under reducing atmosphere, in high-temper...

Embodiment 2

[0045] Sr 5.88 AlSi 3 N 3 o 9 :0.12Eu 2+ Synthesis of phosphors.

[0046] According to the stoichiometric ratio, weigh 8.6 grams of strontium carbonate, 0.45 grams of silicon dioxide, 0.51 grams of aluminum oxide, 1.05 grams of silicon nitride and 0.21 grams of europium oxide as raw materials, weigh 0.5 grams of strontium fluoride and 0.5 grams of barium fluoride As a co-solvent, put the weighed raw materials and co-solvent in an agate jar, grind the powder finely and mix it evenly.

[0047] Then put the mixed raw materials in the corundum crucible, in the high-temperature resistance furnace, under the CO reduction gas generated by the combustion of carbon particles in the air, in the high-temperature tube furnace, heat up to 1450°C at a heating rate of 200°C / hour , and kept at this temperature for 5 hours, then stopped heating, and slowly cooled to room temperature under the protection of CO reducing gas generated by the combustion of carbon particles in air.

[0048] T...

Embodiment 3

[0051] Sr 5.38 LiAlSi 3 N 3 o 9 :0.12Eu 2+ Synthesis of phosphors.

[0052] Take by weighing 7.82 grams of strontium carbonate (purity 99%), 0.352 grams of lithium carbonate (purity 99%), 0.45 grams of silicon dioxide (purity 99%), 0.51 grams of aluminum oxide (purity 99%), 1.05 One gram of silicon nitride (purity 99%) and 0.228 gram of europium fluoride (purity 99.99%) are used as raw materials, and the weighed raw materials are placed in an agate jar, and the powder is pulverized and mixed uniformly by grinding.

[0053] Then put the mixed raw materials in the corundum boat, in the high temperature resistance furnace, H 2 / N 2 (5% / 95%) under reducing atmosphere, in high-temperature tube furnace, be heated to 1250 ℃ with the rate of rise of 300 ℃ / hour, and keep 5 hours at this temperature, stop heating subsequently, in H 2 / N 2 (5% / 95%) slowly cooled to room temperature under the protection of reducing atmosphere.

[0054] The powder obtained by sintering was ground ...

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Abstract

The invention relates to fluorescent powder using silicon-aluminum base nitrogen oxides as base materials and a preparation method thereof, which belong to the field of nitrogen oxide preparation and luminescent materials thereof. The fluorescent powder has the composition of M<6-a-c>X<2a>Al<4-b>SiNO<12-b>:cR or M<6-a-c>X<2a>Al<4-b>SiNO<12-b>:(2c/3)R, wherein a crystalline phase represented by M<6-a-c>X<2a>Al<4-b>SiNO<12-b> is used as a major ingredient, and R is used as an optical activity element, wherein M represents any one ion or the combination of any two ions in Ca<2+>, Sr<2+>, Ba<2+> and Zn<2+>, X represents any one ion or the combination of any two ions in Li<+>, Na<+> and K<+>, R is any one ion or the combination of any two ions in Ce, Eu, Bi, Mn, Sn, Tb, Tl, Pb and Sm, a is greater than or equal to 0 and is smaller than or equal to 2, b is greater than or equal to 2 and is smaller than or equal to 3, and c is greater than or equal to 0.001 and is smaller than or equal to 0.2. The fluorescent powder of the invention has good fluorescent performance in the visible light wave band range. When being excited by ultraviolet light, the fluorescent powder has higher luminescent intensity and wider luminescent spectrum. The fluorescent powder can be used for luminescent layers of power type semiconductor illumination devices.

Description

technical field [0001] The invention relates to a fluorescent powder with a silicon-aluminum-based nitrogen oxide as a matrix and a preparation method thereof, belonging to the technical field of luminescent materials. Background technique [0002] In lighting technology, white light LED has become the most promising lighting equipment due to its remarkable advantages such as energy saving, long life, environmental protection, safety, and rich colors. Among them, phosphor is a very critical material in the preparation of white light LEDs. Its performance directly affects the brightness, color coordinates, color temperature, color rendering, and efficiency of white light. For example, in 10W visible light, the visible light produced by phosphor It is 8.8W. Therefore, the development of white LED urgently needs to develop phosphors with high light conversion efficiency and excellent physical and chemical properties. Currently commercialized is YAG:Ce 3+ Yellow phosphor, but...

Claims

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Application Information

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IPC IPC(8): C09K11/80
Inventor 徐时清鞠海东华有杰王焕平邓德刚赵世龙黄立辉苏醒宇
Owner CHINA JILIANG UNIV
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