CN103275708B - A kind of surface-coating method of lamp BAM fluorescent material - Google Patents
A kind of surface-coating method of lamp BAM fluorescent material Download PDFInfo
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- CN103275708B CN103275708B CN201310140035.0A CN201310140035A CN103275708B CN 103275708 B CN103275708 B CN 103275708B CN 201310140035 A CN201310140035 A CN 201310140035A CN 103275708 B CN103275708 B CN 103275708B
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Abstract
The surface-coating method of a kind of lamp BAM fluorescent material of disclosure, weighs yttrium salt or lanthanum salt or alumina sol, configures water-soluble salt solution; And weigh ammonium hydrogen carbonate or ammonia spirit, configuration ammonium bicarbonate soln or ammonia spirit; Then, lamp BAM fluorescent material is configured suspension, after stirring, control water temperature, after adding water-soluble salt solution, add ammonium bicarbonate soln or ammonia spirit, continue stirring; Cleaning then through hot water, dehydration less than after 10 μ s/cm to electrical conductivity, is dried, is obtained the BAM fluorescent material of one or several peplos of yittrium oxide, Yttrium carbonate (Y2(CO3)3), lanthana, lanthanum carbonate and aluminium oxide. The present invention changes the surface characteristic of fluorescent material, improves the surface damage of fluorescent material, improves the dispersibility of fluorescent material, is conducive to the anti-thermal degradation of lamp BAM fluorescent material and is conducive to industrialization.
Description
Technical field
The present invention relates to a kind of surface-coating method of lamp BAM fluorescent material.
Background technology
The one of rare earth luminescent material is big, and application is electric light source, and the yield of lamp phosphor occupies first place in all fluorescent material.
Red-green-blue lamp phosphor composition conventional at present is: Hydrargyri Oxydum Rubrum (Y2O3:Eu3+), green powder (MgAl11O19:Ce3+,Te3+,LaPO4:Ce3+,Te3+), blue powder (BaMgAl10O17:Eu2+), these several fluorescent material have good luminous efficiency and chemical stability, are widely used.
In order to meet the minimizing of dusting amount on straight pipe type electricity-saving lamp, to reduce cost, it is necessary to fluorescent material require granularity less. High temperature solid phase synthesis is simple due to equipment, process stabilizing, and product has good concordance, is beneficial to industrialization and produces, is still topmost fluorescent material synthetic method. But relatively big through the partition size of high?temperature nuclei, granularity requirements need to being can be only achieved through pulverizing, ball milling, thus damaging powder surface, causing luminescent properties and the decline of anti-thermal degradation performance.
Compact type energy-saving lamp is little due to caliber, big 20 times of the load relatively straight pipe type electricity-saving lamp of the 185nm short wavelength UV light radiation that fluorescent material bears, the mercury ion bombardment big several times of intensity, inside pipe wall temperature is up to more than 150 DEG C, and therefore fluorescent material is had more stringent requirement by compact type energy-saving lamp.
Due to the factor of extraneous factor and luminescent material itself, often there is the phenomenons such as powder agglomeration, surface electrical properties and chemical property instability without the luminescent material of surface treatment. The ζ-potential isoelectric point, IP of fluorescent material can be reduced by surface treatment, the raising of the dispersibility improving fluorescent material and the fluorescent material brightness thus brought, it is also possible to protection fluorescent material, reduce the extraneous factor impact on fluorescent material.
Therefore, improving the anti-thermal degradation performance of fluorescent material, improve powder surface damage, it is effective method that fluorescent material carries out peplos process.
Summary of the invention
It is an object of the invention to provide a kind of surface-coating method of lamp BAM fluorescent material; by being coated with layer protecting film at phosphor surface; change the surface characteristic of fluorescent material; improve the surface damage of fluorescent material; improve the dispersibility of fluorescent material, be conducive to the anti-thermal degradation of lamp BAM fluorescent material and be conducive to industrialization.
In order to reach above-mentioned purpose, the present invention adopts the following technical scheme that
A kind of lamp BAM(BaMgAl10O17:Eu2+) the surface-coating method of fluorescent material, specifically comprise the following steps that
The first step, it it is (0.01-1) according to material A and fluorescent material mol ratio: the ratio of 1, weighing the material A of respective amount, material A is one or several of yttrium salt or lanthanum salt or alumina sol, and material A is configured to the water-soluble salt solution that concentration is 0.01-1mol/L;
Second step, is the ratio of 2:3 according to material A and material B mol ratio, and weighing material B, material B is ammonium hydrogen carbonate or ammonia spirit, and material B is configured to ammonium bicarbonate soln or ammonia spirit that mass percent concentration is 5%-20%;
3rd step, puts in water by lamp BAM fluorescent material, is configured to the suspension that molar concentration is 0.1-1mol/L, stirs 30-60 minute;
4th step, control water temperature 15-40 DEG C, after adding water-soluble salt solution when stirring, after 10-30 minute, add ammonium bicarbonate soln or ammonia spirit, continue stirring 10-30 minute, the fluorescent material in suspension is formed carbonate or oxide hydrate peplos;
5th step, cleans the solution of the 4th step through 50-80 DEG C of hot water, dehydration to electrical conductivity less than after 10 μ s/cm, 120-180 DEG C of drying, obtain the BAM fluorescent material of one or several peplos of yittrium oxide, Yttrium carbonate (Y2(CO3)3), lanthana, lanthanum carbonate and aluminium oxide.
After adopting such scheme, present invention have the advantage that
One, being prone to industrialization, can carry out surface-coating in the process of production, the cycle is greatly shortened;
Two, peplos process is easily controllable, and water-soluble salt solution and ammonium bicarbonate soln or ammonia spirit are prone to reaction, and membrane wrapping thickness increases with coating substance consumption and increases within the specific limits, controls coating substance consumption and can effectively control film thickness;
Three, improving powder surface damage, fluorescent material is after ball milling disperses, and damage occurs in surface, is coated with layer protecting film by reacting at phosphor surface, is effectively increased the anti-thermal degradation performance of powder body;
Four, improve powder dispersity, often there is powder agglomeration without the luminescent material of surface treatment, the ζ-potential isoelectric point, IP of fluorescent material can be reduced by surface treatment, improve the dispersibility of fluorescent material.
Detailed description of the invention
Embodiment 1
Weigh 1300g Lanthanum (III) nitrate to be dissolved in 5000ml water, prepare the lanthanum nitrate hexahydrate of 0.6mol/L. Weigh 100g lamp BAM(BaMgAl10O17:Eu2+) fluorescent material, put in the aqueous solution of 1L, stir 60 minutes, make suspension. Weigh ammonium hydrogen carbonate 0.21g and be dissolved in 2.1ml water the ammonium bicarbonate soln of preparation quality percent concentration 10%. Control water temperature 15-40 DEG C, when stirring, add measuring the lanthanum nitrate hexahydrate 1ml prepared in fluorescent material suspension, after stirring 15 minutes, the ammonium bicarbonate soln prepared all is added, continue stirring 15 minutes. Clean with 60 DEG C of hot water, to electrical conductivity less than after 10 μ s/cm, put into pallet, 150 DEG C of drying, obtain the lamp BAM fluorescent material of lanthanum carbonate peplos.
Embodiment 2
Weigh 2100g Yttrium chloride(Y2Cl6) to be dissolved in 5000ml water, prepare the yttrium chloride solution of 1mol/L. Weigh 300Kg lamp BAM(BaMgAl10O17:Eu2+) fluorescent material, put in the aqueous solution of 3000L, stir 60 minutes, make suspension. Weigh the ammonia spirit 1800ml of mass percent concentration 5%. Control water temperature 15-40 DEG C, when stirring, add measuring the yttrium chloride solution 4950ml prepared in fluorescent material suspension, after stirring 15 minutes, the ammonia spirit prepared all is added, continue stirring 15 minutes.Clean to electrical conductivity less than after 10 μ s/cm with 60 DEG C of hot water, put into pallet, 150 DEG C of drying, obtain the lamp BAM fluorescent material of yittrium oxide peplos.
Embodiment 3
Weigh a certain amount of 0.01-1mol/L alumina sol soluble in water, weigh and need BAM(BaMgAl to be processed10O17:Eu2+) fluorescent material, soluble in water, preparation molar concentration is the suspension of 0.1-1mol/L, it it is (0.01-1) according to aluminium oxide and fluorescent material mol ratio: 1 ratio, measure the alumina sol of needs, being 2:3 ratio according to aluminium oxide and ammonium hydrogen carbonate mol ratio, the ammonium hydrogen carbonate weighing respective amount is configured to the ammonium bicarbonate soln that mass percent concentration is 10%. Control water temperature 15-40 DEG C, when stirring, after adding alumina sol, add ammonium bicarbonate soln after 10-30 minute, continue stirring 10-30 minute. Fluorescent material in fluorescent material suspension is formed hydrated alumina peplos. With 50-80 DEG C of hot water cleaning and dewatering to electrical conductivity less than after 10 μ s/cm, put into pallet, 180 DEG C of drying, obtain the lamp BAM fluorescent material of aluminium oxide peplos.
Claims (1)
1. the lamp surface-coating method of BAM fluorescent material, it is characterised in that step is as follows:
The first step, is (0.01-1) according to material A and fluorescent material mol ratio: the ratio of 1, weighs the material A of respective amount, and material A is yttrium salt or the one of lanthanum salt, and material A is configured to the water-soluble salt solution that concentration is 0.01-1mol/L;
Second step, is the ratio of 2:3 according to material A and material B mol ratio, and weighing material B, material B is ammonium hydrogen carbonate, and material B is configured to the ammonium bicarbonate soln that mass percent concentration is 5%-20%;
3rd step, puts in water by lamp BAM fluorescent material, is configured to the suspension that molar concentration is 0.1-1mol/L, stirs 30-60 minute;
4th step, controls water temperature 15-40 DEG C, after adding water-soluble salt solution when stirring, adds ammonium bicarbonate soln, continue stirring 10-30 minute after 10-30 minute, the fluorescent material in suspension is formed carbonate peplos;
5th step, cleans the solution of the 4th step through 50-80 DEG C of hot water, dehydration to electrical conductivity less than after 10 μ s/cm, 120-180 DEG C of drying, obtain the BAM fluorescent material of a kind of peplos of Yttrium carbonate (Y2(CO3)3), lanthanum carbonate.
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| CN201310140035.0A CN103275708B (en) | 2013-02-28 | 2013-04-22 | A kind of surface-coating method of lamp BAM fluorescent material |
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| CN2013100636027 | 2013-02-28 | ||
| CN201310063602.7 | 2013-02-28 | ||
| CN201310140035.0A CN103275708B (en) | 2013-02-28 | 2013-04-22 | A kind of surface-coating method of lamp BAM fluorescent material |
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| CN104388078B (en) * | 2014-10-31 | 2016-03-30 | 电子科技大学 | The BAM:Eu that a kind of carbon is coated 2+blue colour fluorescent powder and preparation method thereof |
| CN116575107A (en) * | 2022-11-01 | 2023-08-11 | 广州珠江光电新材料有限公司 | Preparation method of blue fluorescent powder, product and application thereof |
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| US4806389A (en) * | 1987-03-02 | 1989-02-21 | Gte Laboratories Incorporated | Method of treating a coated phosphor |
| EP1047750B1 (en) * | 1998-08-25 | 2005-04-06 | Koninklijke Philips Electronics N.V. | Method of coating a luminescent material |
| KR100684711B1 (en) * | 2003-11-26 | 2007-02-20 | 삼성에스디아이 주식회사 | Blue phosphor for plasma display panel and method for preparing same |
| CN1295297C (en) * | 2005-02-25 | 2007-01-17 | 东南大学 | Alumina coated fluorescent powder and its coating method |
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Effective date of registration: 20191230 Address after: 510000, Tat Tat Road 1, Po Po Industrial Zone, Whampoa District, Guangdong, Guangzhou Patentee after: GUANGZHOU ZHUJIANG PHOTOELECTRIC NEW MATERIALS CO., LTD. Address before: 366300 Changting Jinlong Industrial rare earth Co., Ltd., Changting Economic Development Zone, Fujian, Longyan Patentee before: Fujian Changting Jinlong Rare Earth Co.,Ltd. |
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