CN101029228A - Production of zinc sulfide electroluminescent fluorescent powder - Google Patents
Production of zinc sulfide electroluminescent fluorescent powder Download PDFInfo
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- CN101029228A CN101029228A CN 200710037119 CN200710037119A CN101029228A CN 101029228 A CN101029228 A CN 101029228A CN 200710037119 CN200710037119 CN 200710037119 CN 200710037119 A CN200710037119 A CN 200710037119A CN 101029228 A CN101029228 A CN 101029228A
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Abstract
Production of zinc sulfide electroluminescent fluorescent powder is carried out by mixing zinc sulfide with activator and fusing agent, ball milling, the first solid-phase reacting at 500-900degree, cooling, washing, drying, ball milling the obtained powder, the second solid-phase reacting, annealing, cooling, washing, drying and screening to obtain the final product. The fusing agent consists of NaCl, MgBr2, BaBr2 and S in proportion of 1:0.5-3:0.5-3:0.5-5, ZnS is 5-15wt%, activator consists of Cu 200-900ppm and Mn 1-10% of ZnS. It's cheap, controllable and has better performance.
Description
Technical field
The present invention relates to a kind of preparation method of zinc sulfide electrofluor powder, belong to the zinc sulfide phosphor preparation field.
Background technology
Information age and electronic age, flat panel display device is being played the part of vital role as the requisite interface of man-machine communication.In numerous real technique of display, the electroluminescent technique of display reaches purpose luminous and that show by the current drives semiconductor film.That this technique of display has is thinner, lighter, active illuminating, wide viewing angle, high-resolution, response is quick, energy consumption is low, low temperature and anti-seismic performance excellence, and information demonstration such as the low manufacturing cost of potential and flexible and environmental protection design and device are made desired nearly all advantageous feature.The electroluminescent technique of display is thought the technique of display of desirable and tool development prospect by industry.
The composition of most critical is exactly the semiconductor EL film in these indicating meters.Electroluminescent material can be inorganic type or organic type material.Inorganic type material chemical property is relatively stable, can be used for screen printing and make display screen, and system screen technology is simple, with low cost; Electric organic electroluminescent material and active metal electrode require very high to the making that shows product, their stability is a big problem that merits attention in display device.The inorganic type electroluminescent powder has been widely used in the display equipment of mobile telephone, advertisement, emergency sign and various vehicles or the like at present.Researching and developing in the world at present electroluminescent is being used for the TV screen and following electronics newspaper.
Usually the zinc sulfide electrofluor powder preparation utilizes muriate fusing assistant solid state reaction 1000-1300 ℃ of calcining, obtains electricity through mechanical ball milling and annealing and causes zinc sulfide phosphor.(Dong Guoyi, Lin Lin, Wei Zhiren, etc.Luminous journal, 2005,26:733-736.S.Han, I.Singh, D.Singh, et al.Journal ofLuminescence, 2005,115:97-103.).The crystal formation that these high temperature produce relies on to grind and anneal and can not all convert the active fluorescent material of high electroluminescent fluorescent to, and mechanical mill is deleterious often, is unfavorable for the electroluminescent fluorescent life-span and the brightness that keep high-quality.High brightness is tightly related with the cubic crystal zinc sulfide of high per-cent with long-life zinc sulfide electrofluor powder, and the zinc sulphide crystallite size in fluorescent material, lattice imperfection and accumulation defective also play important effect to light-emitting phosphor.
Zinc sulfide electrofluor powder is to be that activator obtains ZnS:Cu and ZnS:Cu with copper or manganese, and Mn fluorescent material can produce blue, blue green, green and orange fluorescence, and color mainly realizes by regulating activator.
In sum, the good zinc sulfide electrofluor powder preparation technology of exploitation is of great immediate significance.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of zinc sulfide electrofluor powder, being contemplated that of invention: based on Na
2S-MgCl
2-BaCl
2-S fusing assistant is extraordinary ZnS growth medium, can be easy to change its melting temperature by the proportioning of regulating fusing assistant, and activator also is very easy to enter the ZnS lattice of fluorescence activity in this growth medium; Low-temperature epitaxy can directly obtain having the electrofluor powder of higher cubic crystal zinc sulfide content.The manufacture method of zinc sulfide electrofluor powder among the present invention is characterized in that the abundant ball milling mixing of zinc sulphide that commercially available fluorescence is pure and activator and fusing assistant, carries out the solid state reaction first time at 500-900 ℃, and the time is cooling then in 2-6 hour, washing and oven dry; Again with gained powder ball milling 60-240min; Then carry out the solid state reaction annealing second time (500-900 ℃ is incubated 1-3 hour), and through cool off, wash, dry, sieve finished product fluorescent material.Na of the present invention
2S, MgCl
2, BaCl
2With the S fusing assistant be the mixture of sulfide, muriate and excess of sulfur, wherein a kind of Na of fusing assistant preferably
2S-MgCl
2-BaCl
2-S, its chemical constitution Na
2S: MgCl
2: BaCl
2: S=1: 0.5～3: 0.5～3: 0.5～5 (mol ratio), account for 5～15% of raw material ZnS, can control the growing environment of fluorescent material, thereby realize the controllability of ZnS granule-morphology and composition, improve photoelectric transformation efficiency (seeing Table 1).
ZnS electroluminescent fluorescent powder, preparation method thereof provided by the invention is compared with the prior art of present main flow, and eutectic point is lower, can be controlled in 500-900 ℃ of scope, is convenient to the selection of ZnS particle growth condition;
It is that the feature luminescence center is Cu, Mn or their combination that preparation method provided by the invention selects activator for use, it is 200-900ppm that independent adding and combination add fashionable Cu add-on, Mn is 1-10wt% (in a ZnS weight), the selection in Cu, Mn source can be in its oxide compound, vitriol, nitrate, acetate and the muriate one or both.
Description of drawings
The XRD of the ZnS fluorescent material that Fig. 1 embodiment 1 is prepared.Wherein curve 1 is the solid state reaction first time, and curve 2 is the solid state reaction second time
The TG-DTA of the ZnS fluorescent material of Fig. 2 embodiment 1 preparation shows its aerial oxidized performance
The photoluminescence performance of the ZnS fluorescent material of Fig. 3 embodiment 1 preparation
Embodiment
Below by the description of specific embodiment, with further elaboration substantive distinguishing features of the present invention and obvious improvement.
Embodiment 1:
With raw material ZnS, CuSO
4(600ppm) and fusing assistant (in ZnS weight 8%, Na
2S: MgCl
2: BaCl
2: S=1: 2: 1: 1) mixed by ball milling, place add a cover quartz crucible at 3 hours postcooling of 700 ℃ of stoves calcinings to room temperature, remove fusing assistant with the deionized water cleaning and filtering then, in baking oven, dry, sieve and obtain powder.The powder ball milling that obtains 2 hours 750 ℃ of annealing 2 hours, cools off in air, respectively through dilute hydrochloric acid, deionized water, sodium cyanide and washed with de-ionized water, filters at last, dries and screening obtains the finished product green emitting phosphor.Test result sees Table 1.
With raw material ZnS, CuSO
4(600ppm) and fusing assistant (in ZnS weight 8%, Na
2S: MgCl
2: BaCl
2: S=1: 2: 2: 1) mixed by ball milling, place add a cover quartz crucible at 5 hours postcooling of 700 ℃ of stoves calcinings to room temperature, remove flux with the deionized water cleaning and filtering then, in baking oven, dry, sieve and obtain powder.The powder ball milling that obtains 2 hours 750 ℃ of annealing 2 hours, cools off in air, respectively through dilute hydrochloric acid, deionized water, sodium cyanide and washed with de-ionized water, filters at last, dries and screening obtains the finished product green emitting phosphor.Test result sees Table 1.
Embodiment 3,
With raw material ZnS, CuSO
4(600ppm) and fusing assistant (in ZnS weight 8%, Na
2S: MgCl
2: BaCl
2: S=1: 2: 2: 1) mixed by ball milling, place and add a cover quartz crucible and be cooled to room temperature after 3 hours 800 ℃ of stoves calcinings, remove fusing assistant with the deionized water cleaning and filtering then, in baking oven, dry, sieve and obtain powder.The powder ball milling that obtains 2 hours 750 ℃ of annealing 2 hours, cools off in air, respectively through dilute hydrochloric acid, deionized water, sodium cyanide and washed with de-ionized water, filters at last, dries and screening obtains the finished product green emitting phosphor.Test result sees Table 1.
Embodiment 4,
With raw material ZnS, CuSO
4(300ppm) and fusing assistant (in ZnS weight 5%, Na
2S: MgCl
2: BaCl
2: S=1: 2: 1: 1) mixed by ball milling, place add a cover quartz crucible at 3 hours postcooling of 750 ℃ of stoves calcinings to room temperature, remove fusing assistant with the deionized water cleaning and filtering then, in baking oven, dry, sieve and obtain powder.The powder ball milling that obtains 2 hours 750 ℃ of annealing 2 hours, cools off in air, respectively through dilute hydrochloric acid, deionized water, sodium cyanide and washed with de-ionized water, filters at last, dries and screening obtains the blue look fluorescent material of finished product.Test result sees Table 1.
With raw material ZnS, CuSO
4(600ppm), MnCO
3(5%) and fusing assistant (in ZnS weight 5%, Na
2S: MgCl
2: BaCl
2: S=1: 2: 1: 1) mixed by ball milling, place add a cover quartz crucible at 3 hours postcooling of 750 ℃ of stoves calcinings to room temperature, remove fusing assistant with the deionized water cleaning and filtering then, in baking oven, dry, sieve and obtain powder.The powder ball milling that obtains 2 hours 750 ℃ of annealing 2 hours, cools off in air, respectively through dilute hydrochloric acid, deionized water, sodium cyanide and washed with de-ionized water, filters at last, dries and screening obtains finished product orange fluorescent material.
Embodiment 6,
With raw material ZnS, CuSO
4(600ppm), MnCO
3(5%) and fusing assistant (in ZnS weight 5%, Na
2S: MgCl
2: BaCl
2: S=1: 2: 1: 1) mixed by ball milling, place add a cover quartz crucible at 3 hours postcooling of 750 ℃ of stoves calcinings to room temperature, remove fusing assistant with the deionized water cleaning and filtering then, in baking oven, dry, sieve and obtain powder.The powder ball milling that obtains 2 hours 900 ℃ of annealing 2 hours, cools off in air, respectively through dilute hydrochloric acid, deionized water, sodium cyanide and washed with de-ionized water, filters at last, dries and screening obtains finished product orange fluorescent material.
Embodiment 7,
With raw material ZnS, CuSO
4(600ppm), MnCO
3(5%) and fusing assistant (in ZnS weight 5%, Na
2S: MgCl
2: BaCl
2: S=1: 2.5: 2.5: 4) mixed by ball milling, place add a cover quartz crucible at 3 hours postcooling of 750 ℃ of stoves calcinings to room temperature, remove fusing assistant with the deionized water cleaning and filtering then, in baking oven, dry, sieve and obtain powder.The powder ball milling that obtains 2 hours 550 ℃ of annealing 2 hours, cools off in air, respectively through dilute hydrochloric acid, deionized water, sodium cyanide and washed with de-ionized water, filters at last, dries and screening obtains finished product orange fluorescent material.
With raw material ZnS, CuSO
4(600ppm), MnCO
3(5%) and fusing assistant (in ZnS weight 8%, Na
2S: MgCl
2: BaCl
2: S=1: 0.6: 0.6: 4) mixed by ball milling, place add a cover quartz crucible at 3 hours postcooling of 850 ℃ of stoves calcinings to room temperature, remove fusing assistant with the deionized water cleaning and filtering then, in baking oven, dry, sieve and obtain powder.The powder ball milling that obtains 2 hours 900 ℃ of annealing 2 hours, cools off in air, respectively through dilute hydrochloric acid, deionized water, sodium cyanide and washed with de-ionized water, filters at last, dries and screening obtains finished product orange fluorescent material.
Table one: the ZnS electrofluor powder of embodiment 1-5 preparation and the performance of commercial ZnS powder are relatively
| The fluorescent material type | Chemical formula | Particle diameter (μ m) | Chromaticity coordinates (x, y) | Brightness (cd/m 2) | Transformation period (hour) |
| Green (example 1) | ZnS:Cu | 18 | 0.18，0.45 | 135 | 1510 |
| Green (example 2) | ZnS:Cu | 21 | 0.18，0.48 | 138 | 1530 |
| Green (example 3) | ZnS: | 23 | 0.18，0.47 | 130 | 1580 |
| Blue look (example 4) | ZnS:Cu | 21 | 0.19，0.23 | 55 | 1000 |
| Orange (example 5) | ZnS:Cu， | 20 | 0.52，0.46 | 52 | 1200 |
| Commercial green | ZnS:Cu | 21 | 0.17，0.43 | 125 | 1400 |
| Commercial orange | ZnS:Cu，Mn | 25 | 0.52，0.45 | 32 | 1100 |
The silk screen printing luminescent lamp test of under 400 hertz of conditions of 100 volts of frequencies of voltage, working 24 hours.
Claims (10)
1, a kind of preparation method of zinc sulfide electrofluor powder is characterized in that the abundant ball milling mixing of zinc sulphide, activator and fusing assistant, carries out the solid state reaction first time at 500-900 ℃, cooling then, washing and oven dry; Again with behind the gained powder ball milling; Then carry out the solid state reaction annealing second time, and through cool off, wash, dry, sieve finished product fluorescent material;
The composition of described fusing assistant and mol ratio are NaCl: MgBr
2: BaBr
2: S=1: 0.5～3: 0.5～3: 0.5～5; Usage quantity is 5～15% of a ZnS raw materials quality;
Described activator is Cu, Mn or both combinations, and the add-on of Cu is 200-900ppm, and the add-on of Mn is 1～10% of a ZnS quality;
Described second time, the solid state reaction annealing temperature was 500-900 ℃.
2,, it is characterized in that the solid state reaction time is 2-6 hour for the first time by the preparation method of the described zinc sulfide electrofluor powder of claim 1.
3, by the preparation method of the described zinc sulfide electrofluor powder of claim 1, it is characterized in that for the first time solid state reaction after, through washing, to dry the ball milling time be 60-240min again, makes it even.
4,, it is characterized in that the solid state reaction time is 1-3 hour for the second time by the preparation method of the described zinc sulfide electrofluor powder of claim 1.
5, by the preparation method of the described zinc sulfide electrofluor powder of claim 1, it is characterized in that described activator is Cu.
6,, it is characterized in that activator Cu or Mn source are selected from their oxide compound, vitriol, nitrate, acetate and the muriate one or both by the preparation method of the described zinc sulfide electrofluor powder of claim 1.
7, by the preparation method of claim 1 or 5 described zinc sulfide electrofluor powders, it is characterized in that selecting for use CuSO
4As activator.
8,, it is characterized in that after the solid state reaction cooling for the second time respectively through hydrochloric acid, deionized water, sodium cyanide and washed with de-ionized water by the preparation method of the described zinc sulfide electrofluor powder of claim 1.
9, by the preparation method of each described zinc sulfide electrofluor powder among the claim 1-6 or 8, the proportioning that it is characterized in that regulating fusing assistant realizes the controllability of prepared ZnS granule-morphology and composition.
10, by the preparation method of the described zinc sulfide electrofluor powder of claim 7, the proportioning that it is characterized in that regulating fusing assistant realizes the controllability of prepared ZnS granule-morphology and composition.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102703062A (en) * | 2012-03-12 | 2012-10-03 | 芜湖旭普荧光材料科技有限公司 | Method for manufacturing low-voltage zinc sulfide-based fluorescent powder |
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| CN1099787A (en) * | 1993-09-03 | 1995-03-08 | 天津理工学院 | AC electroluminescent powder material and photo-source made from it and its use in darkroom |
| CN1752176A (en) * | 2004-09-21 | 2006-03-29 | 肇庆羚华有限责任公司 | Process for preparing inorganic electroluminescent material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102703062A (en) * | 2012-03-12 | 2012-10-03 | 芜湖旭普荧光材料科技有限公司 | Method for manufacturing low-voltage zinc sulfide-based fluorescent powder |
| CN102703062B (en) * | 2012-03-12 | 2015-07-08 | 芜湖旭普荧光材料科技有限公司 | Method for manufacturing low-voltage zinc sulfide-based fluorescent powder |
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