CN105778910A - LED oxynitride phosphor and preparation method thereof - Google Patents
LED oxynitride phosphor and preparation method thereof Download PDFInfo
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- CN105778910A CN105778910A CN201410788217.3A CN201410788217A CN105778910A CN 105778910 A CN105778910 A CN 105778910A CN 201410788217 A CN201410788217 A CN 201410788217A CN 105778910 A CN105778910 A CN 105778910A
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- led
- fluorescent powder
- oxynitride fluorescent
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- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title abstract 4
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000011812 mixed powder Substances 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- 238000009877 rendering Methods 0.000 abstract description 5
- 238000004020 luminiscence type Methods 0.000 abstract 2
- 230000032683 aging Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 239000003086 colorant Substances 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000003712 anti-aging effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002284 excitation--emission spectrum Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 229910019990 cerium-doped yttrium aluminum garnet Inorganic materials 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Luminescent Compositions (AREA)
Abstract
The invention discloses an LED oxynitride phosphor and a preparation method thereof. The structural formula of the oxynitride phosphor is (XyRe1-y)4Al3-ySi2N5O2C, wherein X is Sr, Re is Gd, and y is not smaller than 0.1 and not greater than 0.5. The oxynitride phosphor improves the luminescence efficiency of common phosphors, has the advantages of high luminescence efficiency, ageing resistance, prolonged life, improved luminous efficiency and high color rendering property, and can be used as a preferred material of large-power LED phosphors.
Description
Technical field
The present invention relates to a kind of LED oxynitride fluorescent powder and preparation method thereof, belong to fluorescent material preparation field.
Background technology
White light LEDs is as a new generation's lighting source, and it has a lot of advantage compared with traditional lighting source such as fluorescent lamp and electric filament lamp, for instance: energy-conserving and environment-protective, luminous efficiency height, life-span length, the advantage such as bright in luster.Therefore, it is referred to as the forth generation solid-state illumination light source after fluorescent lamp, electric filament lamp, and its application is more and more extensive, receives significant attention.
The method realizing white light LEDs currently mainly has three kinds: one to be utilize multiple LED chip method, with the LED of 3 kinds of colors green, red, blue, according to three primary color theory, sends white light according to certain ratio combination；Two is utilize fluorescent material transformation approach, the blue-light excited YAG:Ce launched with GaN base chip3+The light that fluorescent material, chip and fluorescent material send is mixed to form white light；Three is integrated single-chip method, is utilize multiple active layer to make LED directly send white light in a chip.Second method is applied maximum also the most ripe at present, but shortcoming is also fairly obvious, due to the white light being gold-tinted and blue light two primary colours are compounded to form, has lacked the composition of redness, and color rendering index is on the low side.
At present, green both domestic and external and yellow fluorescent powder are very ripe in LED package application, but red fluorescence powder can not compared with other fluorescent material due to stability and luminous efficiency, and poor stability, the life-span is short, luminous efficiency is low, it is difficult to meet the requirement of three primary colors fluorescent powder.Recently the class oxynitride fluorescent powder synthesized then can overcome the disadvantages that this defect.Recent years, nitride and nitrogen oxides that rare-earth activated particularly Eu activates receive very big concern, and are rapidly progressed.The alkaline earth nitride red-emitting phosphors that Eu activates is the high-efficiency fluorescence body developed rapidly till now from 1999, is limited mainly by solid-state illumination LED development and rises.The physico-chemical property of this kind of nitride red fluorophor is very stable, air and water are stablized and does not decompose, and there is the advantages such as little, the life-span length of light decay, and it is used widely in white-light LED encapsulation, full spectrum, low colour temperature be new, high-color rendering light source to make white light LEDs realize.
Summary of the invention
Present invention aims to the defect that prior art exists, the preparation method that the oxynitride fluorescent powder of a kind of Effective Anti light decay is provided, this oxynitride fluorescent powder improves common phosphors luminous efficiency, luminous efficiency is high, anti-ageing and extend the fluorescent material life-span, improve luminous efficiency, there is high-color rendering.
The technical scheme realizing the object of the invention is: a kind of LED oxynitride fluorescent powder, the structural formula of this oxynitride fluorescent powder is (XyRe1-y)4Al3-ySi2N5O2C, wherein, X is Sr, Re is Gd, 0.1≤y≤0.5.
The preparation method of above-mentioned LED oxynitride fluorescent powder, comprises the steps:
The oxide of Sr, Gd element will be contained respectively, measure ratio according to the chemical constitution of LED oxynitride fluorescent powder, with Al2O3、Si3N4Mix with graphite powder, and grind, above-mentioned mixed-powder is placed in high temperature sintering furnace, at H2Being warmed up to 1495-1505 DEG C under atmosphere to keep 6 hours, then be warmed up to 1695-1705 DEG C and keep 4 hours, heating rate is 550 DEG C/h, is then cooled to room temperature, finally obtains oxynitride fluorescent powder.
H in stove2Volume ratio is 90%.
Compared with prior art, the oxynitride fluorescent powder of the present invention improves common phosphors luminous efficiency, and luminous efficiency is high, anti-ageing and extend the fluorescent material life-span, improving luminous efficiency, have high-color rendering, this oxynitride fluorescent powder can as high-power LED fluorescent powder preferred material.
Accompanying drawing explanation
Fig. 1 is embodiments of the invention one (X0.1Re0.9)4Al4.9Si2N5O2The room temperature excitation-emission spectrum of C fluorescent material.
Detailed description of the invention
Embodiment one: (X0.1Re0.9)4Al4.9Si2N5O2The preparation of C fluorescent material
Claim oxide each 1.11325g, Al containing Sr, Gd respectively2O3For 0.923122g, Si3N4For 2.1356g, graphite powder 3.66g, and grind.Above-mentioned oxide is placed in high temperature sintering furnace, under 90%H2 atmosphere, is warmed up to 1500 DEG C keeps 6 hours, then be warmed up to 1700 DEG C and keep 4 hours, heating rate is 550 DEG C/h, then being cooled to room temperature, finally obtain oxynitride fluorescent powder, its room temperature excitation-emission spectrum is as shown in Figure 1.
Embodiment two: (X0.3Re0.7)4Al4.7Si2N5O2The preparation of C fluorescent material
Claim oxide each 1.26334g, Al containing Sr, Gd respectively2O3For 0.89632g, Si3N4For 1.98655g, graphite powder 4.12g, and grind.Being placed in high temperature sintering furnace by above-mentioned oxide, be warmed up to 1500 DEG C and keep 6 hours, then be warmed up to 1700 DEG C and keep 4 hours under 90%H2 atmosphere, heating rate is 550 DEG C/h, is then cooled to room temperature, finally obtains oxynitride fluorescent powder.
Embodiment three: (X0.5Re0.5)4Al4.5Si2N5O2The preparation of C fluorescent material
Claim oxide each 1.51235g, Al containing Sr, Gd respectively2O3For 0.67815g, Si3N4For 1.93512g, graphite powder 4.52g, and grind.Being placed in high temperature sintering furnace by above-mentioned oxide, be warmed up to 1500 DEG C and keep 6 hours, then be warmed up to 1700 DEG C and keep 4 hours under 90%H2 atmosphere, heating rate is 550 DEG C/h, is then cooled to room temperature, finally obtains oxynitride fluorescent powder.
Claims (7)
1. a LED oxynitride fluorescent powder, it is characterised in that the structural formula of this oxynitride fluorescent powder is (XyRe1-y)4Al3-ySi2N5O2C, wherein, X is Sr, Re is Gd, 0.1≤y≤0.5.
2. LED oxynitride fluorescent powder as claimed in claim 1, it is characterised in that described fluorescent material is prepared by following steps: will contain the oxide of Sr, Gd element respectively, measures ratio according to the chemical constitution of LED oxynitride fluorescent powder, with Al2O3、Si3N4Mix with graphite powder, and grind, above-mentioned mixed-powder is placed in high temperature sintering furnace, at H2It is warmed up to 1495-1505 DEG C under atmosphere to keep 6 hours, then is warmed up to 1695-1705 DEG C and keeps 4 hours, be then cooled to room temperature, finally obtain oxynitride fluorescent powder.
3. LED oxynitride fluorescent powder as claimed in claim 2, it is characterised in that heating rate is 550 DEG C/h.
4. LED oxynitride fluorescent powder as claimed in claim 2, it is characterised in that H in stove2Volume ratio is 90%.
5. the preparation method of a LED oxynitride fluorescent powder, it is characterised in that comprise the steps:
The oxide of Sr, Gd element will be contained respectively, measure ratio according to the chemical constitution of LED oxynitride fluorescent powder, with Al2O3、Si3N4Mix with graphite powder, and grind, above-mentioned mixed-powder is placed in high temperature sintering furnace, at H2It is warmed up to 1495-1505 DEG C under atmosphere to keep 6 hours, then is warmed up to 1695-1705 DEG C and keeps 4 hours, be then cooled to room temperature, finally obtain oxynitride fluorescent powder.
6. the preparation method of LED oxynitride fluorescent powder as claimed in claim 5, it is characterised in that heating rate is 550 DEG C/h.
7. the preparation method of LED oxynitride fluorescent powder as claimed in claim 5, it is characterised in that H in stove2Volume ratio is 90%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410788217.3A CN105778910A (en) | 2014-12-17 | 2014-12-17 | LED oxynitride phosphor and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410788217.3A CN105778910A (en) | 2014-12-17 | 2014-12-17 | LED oxynitride phosphor and preparation method thereof |
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| Publication Number | Publication Date |
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| CN105778910A true CN105778910A (en) | 2016-07-20 |
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| CN201410788217.3A Pending CN105778910A (en) | 2014-12-17 | 2014-12-17 | LED oxynitride phosphor and preparation method thereof |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103154195A (en) * | 2011-03-29 | 2013-06-12 | 顺天大学校产学协力团 | Oxynitride-based phosphor |
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- 2014-12-17 CN CN201410788217.3A patent/CN105778910A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103154195A (en) * | 2011-03-29 | 2013-06-12 | 顺天大学校产学协力团 | Oxynitride-based phosphor |
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Application publication date: 20160720 |
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