CN102899039A - Cyan luminescent material and preparation method thereof - Google Patents
Cyan luminescent material and preparation method thereof Download PDFInfo
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- CN102899039A CN102899039A CN2012104453478A CN201210445347A CN102899039A CN 102899039 A CN102899039 A CN 102899039A CN 2012104453478 A CN2012104453478 A CN 2012104453478A CN 201210445347 A CN201210445347 A CN 201210445347A CN 102899039 A CN102899039 A CN 102899039A
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- 239000000463 material Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 28
- 239000000126 substance Substances 0.000 claims abstract description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 46
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 46
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 46
- 239000000203 mixture Substances 0.000 claims description 38
- 238000005245 sintering Methods 0.000 claims description 18
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 claims description 16
- 229960001866 silicon dioxide Drugs 0.000 claims description 16
- 235000012239 silicon dioxide Nutrition 0.000 claims description 16
- 239000000377 silicon dioxide Substances 0.000 claims description 16
- 229910000018 strontium carbonate Inorganic materials 0.000 claims description 16
- 238000005303 weighing Methods 0.000 claims description 16
- -1 rare-earth oxalate Chemical class 0.000 claims description 10
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 4
- DHEQXMRUPNDRPG-UHFFFAOYSA-N strontium nitrate Chemical compound [Sr+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O DHEQXMRUPNDRPG-UHFFFAOYSA-N 0.000 claims description 4
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Chemical compound [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 claims description 4
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims description 3
- 229910002651 NO3 Inorganic materials 0.000 claims description 2
- 150000001337 aliphatic alkines Chemical class 0.000 claims description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 2
- 238000001354 calcination Methods 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 claims description 2
- 229910001960 metal nitrate Inorganic materials 0.000 claims description 2
- 229910001631 strontium chloride Inorganic materials 0.000 claims description 2
- AHBGXTDRMVNFER-UHFFFAOYSA-L strontium dichloride Chemical compound [Cl-].[Cl-].[Sr+2] AHBGXTDRMVNFER-UHFFFAOYSA-L 0.000 claims description 2
- 229910052693 Europium Inorganic materials 0.000 abstract description 3
- 230000005284 excitation Effects 0.000 abstract description 3
- 101100496858 Mus musculus Colec12 gene Proteins 0.000 description 14
- 229910004298 SiO 2 Inorganic materials 0.000 description 14
- AEBZCFFCDTZXHP-UHFFFAOYSA-N europium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Eu+3].[Eu+3] AEBZCFFCDTZXHP-UHFFFAOYSA-N 0.000 description 14
- 239000004570 mortar (masonry) Substances 0.000 description 14
- AMGRXJSJSONEEG-UHFFFAOYSA-L strontium dichloride hexahydrate Chemical compound O.O.O.O.O.O.Cl[Sr]Cl AMGRXJSJSONEEG-UHFFFAOYSA-L 0.000 description 14
- 239000003086 colorant Substances 0.000 description 6
- 238000010894 electron beam technology Methods 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 241001062009 Indigofera Species 0.000 description 2
- 229910004283 SiO 4 Inorganic materials 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000001857 fluorescence decay curve Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
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Abstract
The invention discloses a cyan luminescent material and a preparation method thereof. The chemical structural formula of the cyan luminescent material is (4-x)SrO.4SiO2.4SrCl2.xEuO, wherein Eu<2+> (divalent europium ion) is an activated ion, x is the molar weight of Eu to substitute Sr, and the x is more than or equal to 0.01 and less than or equal to 0.50. The preparation method is simple; the prepared cyan luminescent material is high in luminous intensity, and under the excitation of vacuum-ultraviolet light (147nm, 172nm) and low-voltage cathode rays (3kV, 25muA.cm<-2>, the luminescent intensity of the cyan luminescent material is respectively 148%, 60% and 280% of that of commercial blue fluorescent powder BaMgAl10O17:Eu<2+>(BAM); the chromaticity coordinates (0.136, 0.298) of the cyan luminescent material are positioned in a cyan light area, and if the cyan luminescent material is introduced into tree-primary-color florescent powder for a plasma display panel (PDP) and field emission display (FED), the display range of the fluorescent powder can be significantly expanded; and the speed of fluorescence decay is high, and the time of the fluorescence decay is about 0.9mus, so that the cyan luminescent material is suitable for three-dimensional (3D) display.
Description
Technical field
The present invention relates to a kind of cyan luminescent material and preparation method thereof
Background technology
Plasma flat shows (Plasma Display Panel, abbreviation PDP) technology is to utilize the ultraviolet ray of the basic rare gas mixed gas plasma of xenon (Xe) discharge generation (mainly at 147 nm and 172 nm) the luminous a kind of flat-panel display device of excitated fluorescent powder, it is fast to have refresh rate, the visual angle is wide, light efficiency and brightness are high, life-span is long, easily makes the advantages such as giant-screen, is one of flat panel display of at present main large-screen high-resolution degree.
Field Emission Display (Field Emission Display is called for short FED) technology is a kind of flat panel display that development in recent years is got up, and its principle of work and traditional CRT show similar, are applied to the fluorescent material video picture of display screen by beam bombardment.But with CRT by electromagnetic field control electronics deflection different be that FED does not need deflector coil because plane earth sends electronics.In addition, the FED anode voltage is low, and CRT is the emission of hot high pressure electron beam.This has potential advantage so that FED can be made into very thin flat-panel monitor at aspects such as brightness, visual angle, time of response, operating temperature range, energy consumptions.
3D(three Dimensional) technique of display is by indicating meter left image and right image that two width of cloth have potential difference to be presented to respectively left eye and right eye, and image namely forms the required parallax of stereoscopic vision after mirroring eyes, thereby realizes stereo display.Will watch respectively left image and right image because of left eye and right eye, this just requires for the fluorescent material of 3D indicating meter fast fluorescence decay (≤2 ms) to be arranged, to prevent the cross-effect of left and right sides image.
PDP and FED are the important technologies of realizing that at present 3D shows because of its advantage separately, and as the critical material of PDP and FED, fluorescent material is directly determining the performance of PDP and FED.Commercial PDP three primary colors fluorescent powder is mainly (Y, Gd) BO
3: Eu
3+(red), Zn
2SiO
4: Mn
2+(green) and BaMgAl
10O
17: Eu
2+(indigo plant), they are that fluorescence quantum efficiency is higher in the similar fluorescent material, but also exist problem in actual applications, common ground is that luminous efficiency and luminous efficiency are low., be considered to the reasonable FED three primary colors fluorescent powder of effect Y at present
2O
3: Eu
3+, Y
2SiO
5: Tb
3+(green), Y
2SiO
5: Ce
3+(indigo plant) luminous indication range (colour gamut) is narrower, has limited the development of field emission flat panel display.
Therefore, in order to adapt to PDP, the development of FED and novel 3D technique of display, we should seek new material system, solve existing variety of issue, make fluorescent material can satisfy the requirement of use.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of 3D-PDP of being applicable to and 3D-FED are provided, and can enlarge the pastiness light luminescence rare earth material of PDP and FED demonstration colour gamut.
Another object of the present invention provides the preparation method of above-mentioned luminescent material.
Cyan luminescent material of the present invention has following chemical constitution expression: (4-x) SrO4SiO
24SrCl
2XEuO, wherein, Eu
2+Be active ions; X is the molar weight that Eu replaces Sr, span: 0.01≤x≤0.50.
The selected substrate material of the present invention is SrOSiO
2SrCl
2Luminescence center is the bivalent rare earth europium ion.Excite down at vacuum-ultraviolet light and denoted low voltage electron beam, the bivalent rare earth europium ion is pastiness light in matrix.
The preparation method of above-mentioned luminescent material comprises the steps: accurately to take by weighing raw material according to the chemical constitution expression of above-mentioned fluorescent material, fully grinds and mixes; Then with mixture pre-burning in the carbon monoxide reducing atmosphere, naturally cool to room temperature, again fully grind after the taking-up and mix; Sintering in the carbon monoxide reducing atmosphere is cooled to room temperature at last, product is taken out to grind just obtain product.
In above-mentioned preparation method, described raw material can be decomposed into one or more mixture of alkaline earth metal carbonate, the alkine earth metal nitrate of alkaline earth metal oxide for when heating; Can resolve into the rare-earth oxalate of rare earth oxide when rare earth oxide or heating, rare earth carbonate, the mixture of one or more in the rare earth nitrate; Strontium oxide, Strontium carbonate powder, strontium nitrate, the mixture of one or more in the strontium chloride; Silicon-dioxide.
In above-mentioned preparation method, described calcined temperature is 700 ℃ ~ 850 ℃, and the time is 1.5 hours; Sintering temperature is 900 ℃, and calcination time is 2 hours.
Compared with prior art, the present invention has following beneficial effect:
1. fluorescent material of the present invention excites the lower strong green light emission (peak value is positioned at about 486 nm) that has at vacuum-ultraviolet light (147 nm and 172 nm) and denoted low voltage electron beam.Under the identical test condition, at 147 nm, 172 nm vacuum-ultraviolet lights and low pressure (3 kV, 25 μ Acm
2) emmission spectrum under the electron-beam excitation shows that fluorescent material of the present invention is higher than the emissive porwer of the commercial blue colour fluorescent powder BAM that uses at present, integrated intensity is about respectively 148%, 60% and 280% of BAM.
2. the chromaticity coordinates of fluorescent material of the present invention is (0.136,0.298), can enlarge to a great extent the colour gamut of PDP and FED three primary colors fluorescent powder.
3. the fluorescence lifetime of fluorescent material of the present invention is about 0.9 μ s, and decay is fast, can satisfy the requirement of 3D-PDP and 3D-FED indicating meter rapid movement picture.
4. fluorescent material synthesis step of the present invention is simple, and easy handling is with low cost.
Description of drawings
Fig. 1 is the upper figure of 147 nm(), scheme among 172 nm() and low pressure (3 kV, 25 μ Acm
2) negative ray (figure below) excites down the cyan luminescent material 3.5SrO4SiO of embodiment 14
24SrCl
20.5EuO the emmission spectrum contrast figure with commodity powder BAM blue powder.
Fig. 2 is cyan luminescent material and PDP three primary colors fluorescent powder (Y, the Gd) BO of embodiment 14
3: Eu
3+(R), Zn
2SiO
4: Mn
2+(G) and BaMgAl
10O
17: Eu
2+(B) and FED three primary colors fluorescent powder Y
2O
3: Eu
3+(R '), Y
2SiO
5: Tb
3+(G '), Y
2SiO
5: Ce
3+(B ') position view in chromaticity diagram.
Fig. 3 is the fluorescence lifetime decay pattern of the cyan luminescent material of embodiment 14.
Embodiment:
Embodiment 1:
Take by weighing europium sesquioxide (Eu
2O
3) 0.0035 g, Strontium carbonate powder (SrCO
3) 1.1781 g, Strontium dichloride hexahydrate (SrCl
26H
2O) 2.1330 g, silicon-dioxide (SiO
2) 1.1810 g, in agate mortar, fully grind and mix; Then in carbon monoxide (CO) reducing atmosphere, 820 ℃ of lower pre-burnings 1.5 hours naturally cool to room temperature, again fully grind after the taking-up and mix; 900 ℃ of sintering 2 hours in carbon monoxide atmosphere are cooled to room temperature at last, product are taken out to grind just obtain product.
Embodiment 2:
Take by weighing europium sesquioxide (Eu
2O
3) 0.0106 g, Strontium carbonate powder (SrCO
3) 1.1722 g, Strontium dichloride hexahydrate (SrCl
26H
2O) 2.1330 g, silicon-dioxide (SiO
2) 1.1810 g, in agate mortar, fully grind and mix; Then in carbon monoxide (CO) reducing atmosphere, 820 ℃ of lower pre-burnings 1.5 hours naturally cool to room temperature, again fully grind after the taking-up and mix; 900 ℃ of sintering 2 hours in carbon monoxide atmosphere are cooled to room temperature at last, product are taken out to grind just obtain product.
Embodiment 3:
Take by weighing europium sesquioxide (Eu
2O
3) 0.0176 g, Strontium carbonate powder (SrCO
3) 1.1663 g, Strontium dichloride hexahydrate (SrCl
26H
2O) 2.1330 g, silicon-dioxide (SiO
2) 1.1810 g, in agate mortar, fully grind and mix; Then in carbon monoxide (CO) reducing atmosphere, 820 ℃ of lower pre-burnings 1.5 hours naturally cool to room temperature, again fully grind after the taking-up and mix; 900 ℃ of sintering 2 hours in carbon monoxide atmosphere are cooled to room temperature at last, product are taken out to grind just obtain product.
Embodiment 4:
Take by weighing europium sesquioxide (Eu
2O
3) 0.0246 g, Strontium carbonate powder (SrCO
3) 1.1604 g, Strontium dichloride hexahydrate (SrCl
26H
2O) 2.1330 g, silicon-dioxide (SiO
2) 1.1810 g, in agate mortar, fully grind and mix; Then in carbon monoxide (CO) reducing atmosphere, 820 ℃ of lower pre-burnings 1.5 hours naturally cool to room temperature, again fully grind after the taking-up and mix; 900 ℃ of sintering 2 hours in carbon monoxide atmosphere are cooled to room temperature at last, product are taken out to grind just obtain product.
Embodiment 5:
Take by weighing europium sesquioxide (Eu
2O
3) 0.0317 g, Strontium carbonate powder (SrCO
3) 1.1545 g, Strontium dichloride hexahydrate (SrCl
26H
2O) 2.1330 g, silicon-dioxide (SiO
2) 1.1810 g, in agate mortar, fully grind and mix; Then in carbon monoxide (CO) reducing atmosphere, 820 ℃ of lower pre-burnings 1.5 hours naturally cool to room temperature, again fully grind after the taking-up and mix; 900 ℃ of sintering 2 hours in carbon monoxide atmosphere are cooled to room temperature at last, product are taken out to grind just obtain product.
Embodiment 6:
Take by weighing europium sesquioxide (Eu
2O
3) 0.0352 g, Strontium carbonate powder (SrCO
3) 1.1515 g, Strontium dichloride hexahydrate (SrCl
26H
2O) 2.1330 g, silicon-dioxide (SiO
2) 1.1810 g, in agate mortar, fully grind and mix; Then in carbon monoxide (CO) reducing atmosphere, 820 ℃ of lower pre-burnings 1.5 hours naturally cool to room temperature, again fully grind after the taking-up and mix; 900 ℃ of sintering 2 hours in carbon monoxide atmosphere are cooled to room temperature at last, product are taken out to grind just obtain product.
Embodiment 7:
Take by weighing europium sesquioxide (Eu
2O
3) 0.0528 g, Strontium carbonate powder (SrCO
3) 1.1367 g, Strontium dichloride hexahydrate (SrCl
26H
2O) 2.1330 g, silicon-dioxide (SiO
2) 1.1810 g, in agate mortar, fully grind and mix; Then in carbon monoxide (CO) reducing atmosphere, 820 ℃ of lower pre-burnings 1.5 hours naturally cool to room temperature, again fully grind after the taking-up and mix; 900 ℃ of sintering 2 hours in carbon monoxide atmosphere are cooled to room temperature at last, product are taken out to grind just obtain product.
Embodiment 8:
Take by weighing europium sesquioxide (Eu
2O
3) 0.0704 g, Strontium carbonate powder (SrCO
3) 1.1220 g, Strontium dichloride hexahydrate (SrCl
26H
2O) 2.1330 g, silicon-dioxide (SiO
2) 1.1810 g, in agate mortar, fully grind and mix; Then in carbon monoxide (CO) reducing atmosphere, 820 ℃ of lower pre-burnings 1.5 hours naturally cool to room temperature, again fully grind after the taking-up and mix; 900 ℃ of sintering 2 hours in carbon monoxide atmosphere are cooled to room temperature at last, product are taken out to grind just obtain product.
Embodiment 9:
Take by weighing europium sesquioxide (Eu
2O
3) 0.0880 g, Strontium carbonate powder (SrCO
3) 1.1072 g, Strontium dichloride hexahydrate (SrCl
26H
2O) 2.1330 g, silicon-dioxide (SiO
2) 1.1810 g, in agate mortar, fully grind and mix; Then in carbon monoxide (CO) reducing atmosphere, 820 ℃ of lower pre-burnings 1.5 hours naturally cool to room temperature, again fully grind after the taking-up and mix; 900 ℃ of sintering 2 hours in carbon monoxide atmosphere are cooled to room temperature at last, product are taken out to grind just obtain product.
Embodiment 10:
Take by weighing europium sesquioxide (Eu
2O
3) 0.1056 g, Strontium carbonate powder (SrCO
3) 1.0952 g, Strontium dichloride hexahydrate (SrCl
26H
2O) 2.1330 g, silicon-dioxide (SiO
2) 1.1810 g, in agate mortar, fully grind and mix; Then in carbon monoxide (CO) reducing atmosphere, 820 ℃ of lower pre-burnings 1.5 hours naturally cool to room temperature, again fully grind after the taking-up and mix; 900 ℃ of sintering 2 hours in carbon monoxide atmosphere are cooled to room temperature at last, product are taken out to grind just obtain product.
Embodiment 11:
Take by weighing europium sesquioxide (Eu
2O
3) 0.1232 g, Strontium carbonate powder (SrCO
3) 1.0777 g, Strontium dichloride hexahydrate (SrCl
26H
2O) 2.1330 g, silicon-dioxide (SiO
2) 1.1810 g, in agate mortar, fully grind and mix; Then in carbon monoxide (CO) reducing atmosphere, 820 ℃ of lower pre-burnings 1.5 hours naturally cool to room temperature, again fully grind after the taking-up and mix; 900 ℃ of sintering 2 hours in carbon monoxide atmosphere are cooled to room temperature at last, product are taken out to grind just obtain product.
Embodiment 12:
Take by weighing europium sesquioxide (Eu
2O
3) 0.1408 g, Strontium carbonate powder (SrCO
3) 1.0629 g, Strontium dichloride hexahydrate (SrCl
26H
2O) 2.1330 g, silicon-dioxide (SiO
2) 1.1810 g, in agate mortar, fully grind and mix; Then in carbon monoxide (CO) reducing atmosphere, 820 ℃ of lower pre-burnings 1.5 hours naturally cool to room temperature, again fully grind after the taking-up and mix; 900 ℃ of sintering 2 hours in carbon monoxide atmosphere are cooled to room temperature at last, product are taken out to grind just obtain product.
Embodiment 13:
Take by weighing europium sesquioxide (Eu
2O
3) 0.1584 g, Strontium carbonate powder (SrCO
3) 1.0482 g, Strontium dichloride hexahydrate (SrCl
26H
2O) 2.1330 g, silicon-dioxide (SiO
2) 1.1810 g, in agate mortar, fully grind and mix; Then in carbon monoxide (CO) reducing atmosphere, 820 ℃ of lower pre-burnings 1.5 hours naturally cool to room temperature, again fully grind after the taking-up and mix; 900 ℃ of sintering 2 hours in carbon monoxide atmosphere are cooled to room temperature at last, product are taken out to grind just obtain product.
Embodiment 14:
Take by weighing europium sesquioxide (Eu
2O
3) 0.1760 g, Strontium carbonate powder (SrCO
3) 1.0334 g, Strontium dichloride hexahydrate (SrCl
26H
2O) 2.1330 g, silicon-dioxide (SiO
2) 1.1810 g, in agate mortar, fully grind and mix; Then in carbon monoxide (CO) reducing atmosphere, 820 ℃ of lower pre-burnings 1.5 hours naturally cool to room temperature, again fully grind after the taking-up and mix; 900 ℃ of sintering 2 hours in carbon monoxide atmosphere are cooled to room temperature at last, product are taken out to grind just obtain product.
(exciting voltage is 3 kV to cyan luminescent material of the present invention, and heater current is 25 μ Acm in vacuum-ultraviolet light (147 nm, 172 nm) and denoted low voltage electron beam
-2) emmission spectrum under exciting is shown among Fig. 1.Can observe: (4-x) SrO4SiO
24SrCl
2XEuO(0.01≤x≤0.50) serial luminescent material (embodiment 1 – 14) pastiness light, representative sample 3.5SrO4SiO
24SrCl
20.5EuO(embodiment 14) emmission spectrum (Fig. 1) show that emission wavelength is about 486 nm.At 147 nm, under 172 nm vacuum-ultraviolet lights and low pressure (3 kV) electron-beam excitation, the integrated intensity of emission can reach 148 % of commercial blue powder BAM, 60 % and 280 %.
Can be observed by the tristimulus coordinates figure among Fig. 2, the chromaticity coordinates of embodiment 14 (0.136,0.298) is positioned at the cyan light district, can significantly enlarge the colour gamut of PDP and FED three primary colors fluorescent powder.
Life-span extinction curve from Fig. 3 can be observed, and the fluorescence lifetime of embodiment 14 is about 0.9 μ s, and decay is fast, is suitable for fast 3D indicating meter of motion picture.
The claimed serial cyan fluorescent material of the present invention has similar structure, has basically identical spectral quality.The spectrum of other cyan fluorescent material, chromaticity coordinates figure and fluorescence decay curve and embodiment 14 are basically identical.The spectrum of embodiment 14, fluorescence decay curve and chromaticity coordinates figure represented should series cyan fluorescent material.
Claims (4)
1. cyan luminescent material, its chemical constitution expression is: (4-x) SrO4SiO
24SrCl
2XEuO,
Wherein, Eu
2+Be active ions; X is the molar weight that Eu replaces Sr, span: 0.01≤x≤0.50.
2. the preparation method of the described luminescent material of claim 1 is characterized in that comprising the steps: that the chemical constitution expression according to above-mentioned fluorescent material accurately takes by weighing raw material, fully grinds and mixes; Then with mixture pre-burning in the carbon monoxide reducing atmosphere, naturally cool to room temperature, again fully grind after the taking-up and mix; Sintering in the carbon monoxide reducing atmosphere is cooled to room temperature at last, product is taken out to grind just obtain product.
3. preparation method as claimed in claim 2 is characterized in that described raw material is: rare earth oxide, rare-earth oxalate, rare earth carbonate, the mixture of one or more in the rare earth nitrate; The mixture of one or more of alkaline earth metal carbonate, alkine earth metal nitrate; Strontium oxide, Strontium carbonate powder, strontium nitrate, the mixture of one or more in the strontium chloride; Silicon-dioxide.
4. preparation method as claimed in claim 2 is characterized in that, described calcined temperature is 700 ℃ ~ 850 ℃, and the time is 0.5 ~ 2 hour; Sintering temperature is 900 ℃, and calcination time is 2 hours.
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| CN114605986A (en) * | 2022-03-09 | 2022-06-10 | 北京科技大学 | Purple light excited chlorine-containing silicate blue-cyan fluorescent powder and preparation and application methods thereof |
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