KR100513959B1 - Preparation of spherical phosphor having improved photoluminescence and thermal stability - Google Patents
Preparation of spherical phosphor having improved photoluminescence and thermal stability Download PDFInfo
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Abstract
본 발명은 물성, 특히 휘도 및 열화특성이 개선된 형광체의 제조방법에 관한 것으로, 보다 구체적으로는 PDP(플라즈마 디스플레이 패널)용 형광체, 예를 들면 구형 적색((Y,Gd)BO3:Eu, Y2O3:Eu, Gd2O3:Eu), 녹색(Zn 2SiO4:Mn, YBO3:Tb, BaAl12O19:Mn), 청색 (BaMgAl10O17:Eu,BAM) 형광체 분말의 표면을 소수성이 되도록 표면의 친수성기 (예: 하이드록실기(-OH))를 알킬기, 아릴옥시기 또는 오가노실란기로 치환반응 시킴으로써 그의 열화특성 및 광특성을 개선시키는 방법에 관한 것이다. 본 발명에 의해 제조되어진 열화 및 휘도가 향상된 구형의 형광체는 고화질의 차세대 PDP 제조에 유리하게 이용될 수 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a phosphor having improved physical properties, particularly brightness and deterioration characteristics, and more particularly, a phosphor for a plasma display panel (PDP), for example, a spherical red ((Y, Gd) BO 3 : Eu, Y 2 O 3 : Eu, Gd 2 O 3 : Eu), green (Zn 2 SiO 4 : Mn, YBO 3 : Tb, BaAl 12 O 19 : Mn), blue (BaMgAl 10 O 17 : Eu, BAM) phosphor powder A method of improving the deterioration and optical properties by substituting an alkyl, aryloxy or organosilane group with a hydrophilic group (eg, hydroxyl group (-OH)) on the surface to make the surface hydrophobic. The spherical phosphor improved in deterioration and brightness produced by the present invention can be advantageously used for the production of high-quality next-generation PDP.
Description
본 발명은 구형의 형광체의 휘도 및 열화특성을 향상시킬 수 있는 방법에 관한 것이다. 구체적으로, 본 발명은 예를 들면 분무 열분해 공정에 의해 제조되어진 구형 형광체를 표면처리 함으로써 표면 소수성을 증가시켜 열화특성이 개선되고 발광 특성이 좋은 형광체 분말을 제조하는 방법에 관한 것이다.The present invention relates to a method capable of improving the luminance and deterioration characteristics of spherical phosphors. Specifically, the present invention relates to a method of producing a phosphor powder having improved surface hydrophobicity and good luminescence properties by increasing the surface hydrophobicity, for example, by surface treating a spherical phosphor prepared by a spray pyrolysis process.
PDP용 청색 형광체 중 현재 가장 많이 사용되고 있는 BaMgAl10O17:Eu (BAM:Eu) 형광체는 발광 효율 및 색순도가 우수한 것으로 알려져 있다. 청색 형광 물질인 BAM:Eu은 발광 중심으로 중요하게 작용하는 활성제인 유로피움이 바륨의 자리에 치환됨으로 인해 +2가로 존재하여야 하는데, 분무열분해법으로 제조된 BAM:Eu 분말에 유로피움은 +3가로 존재하기 때문에 고온하의 환원 분위기에서 소성해 줌으로써 유로피움을 +2가로 환원시켜 주는 과정을 필요로 한다. 또한, PDP의 제조 과정에서 산화분위기의 고온 열처리가 반복되는데, 이러한 고온 공정을 거친 후에 청색 형광물질의 열화에 의한 휘도 감소가 큰 문제점으로 작용하고 있다.BaMgAl 10 O 17 : Eu (BAM: Eu) phosphors, which are currently used most among blue phosphors for PDP, are known to have excellent luminous efficiency and color purity. BAM: Eu, a blue fluorescent substance, should be present at +2 value due to the substitution of barium in the place of barium, an active agent that acts as a luminescent center.Europium is +3 in BAM: Eu powder prepared by spray pyrolysis. Since it exists in the transverse direction, it is necessary to reduce the europium to +2 by firing in a reducing atmosphere at a high temperature. In addition, the high temperature heat treatment of the oxidizing atmosphere is repeated in the manufacturing process of the PDP, the luminance reduction due to deterioration of the blue fluorescent material after this high temperature process is a major problem.
이러한 공정 열화의 개선에 대한 연구와 관련하여, 鈴木 등은 일본 특허공개 제2000-34478호에서 바륨의 자리에 스트론튬과 칼슘을 치환함으로써 형광막 형성 과정에서 발광 휘도의 열화가 적은 진공 자외선 형광체를 고상반응법으로 제조하는 방법을 제시하였다. 그러나, 이 방법은 바륨의 자리에 스트론튬 혹은 칼슘을 치환되는 것으로 인해 초기 발광휘도가 감소하거나 색좌표가 변화하는 문제점을 안고 있다. 또, 강 등은 일본 IDW'01에서 공정열화에 대한 메카니즘이 BAM:Eu의 결정구조의 전도층(conduction layer)에 수분이 생김으로 인해 열화가 일어난다고 보고하였다. In connection with the study on the improvement of such process deterioration, in the Japanese Patent Laid-Open Publication No. 2000-34478, 鈴木 et al. Substituted a strontium and calcium in place of barium to solidify a vacuum ultraviolet phosphor with little deterioration in luminescence brightness in the process of forming a fluorescent film. The method of preparation by the reaction method is presented. However, this method has a problem that the initial luminance is reduced or the color coordinates change due to the substitution of strontium or calcium in place of barium. In addition, Kang et al. Reported that the mechanism for process deterioration in Japan IDW'01 is caused by deterioration due to moisture in the conduction layer of the crystal structure of BAM: Eu.
이에, 본 발명자들은 분무열분해 공정에 의해 제조되어진 구형의 형광체들의 표면 처리 방법에 관한 연구를 수행한 결과, 형광체의 표면 소수성을 증가시킴으로써 발광특성을 향상시킬 수 있고, 특히 청색의 경우 열화특성이 개선된 형광체를 수득할 수 있음을 알게 되어 본 발명을 완성하게 되었다.Thus, the present inventors have conducted a study on the surface treatment method of the spherical phosphors prepared by the spray pyrolysis process, it is possible to improve the light emission characteristics by increasing the surface hydrophobicity of the phosphor, in particular in the case of blue deterioration characteristics It has been found that the phosphor can be obtained to complete the present invention.
즉, 본 발명의 목적은 구형 형광체 분말의 표면 소수성을 증가시켜 초기 발광 휘도가 좋으면서도 열화 특성이 개선된 구형 형광체 분말을 제공하는데 있다.That is, it is an object of the present invention to provide spherical phosphor powders having improved initial hydroluminescence and deterioration characteristics by increasing surface hydrophobicity of spherical phosphor powders.
특히, 본 발명은 분무열분해 공정에 의해 제조되어진 구형의 형광체 입자의 표면을 소수성으로 처리하여 물성을 개선하는데 그 목적이 있다. In particular, the present invention has an object to improve the physical properties by treating the surface of the spherical phosphor particles produced by the spray pyrolysis process with hydrophobicity.
상기 목적을 달성하기 위하여 본 발명에서는, 형광체 입자를 알콜 또는 알콜-실란 혼합액과 접촉시켜 그의 표면의 친수성 기를 알킬기, 아릴옥시기 또는 오가노실란기로 치환하는 것을 포함하는, 휘도 및 열화 특성이 개선된 형광체의 제조방법을 제공한다.In order to achieve the above object, the present invention provides improved brightness and deterioration characteristics, comprising contacting the phosphor particles with an alcohol or an alcohol-silane mixture to substitute a hydrophilic group on the surface thereof with an alkyl group, an aryloxy group, or an organosilane group. It provides a method for producing a phosphor.
특히, 본 발명은 분무열분해 공정에 의해 제조된 구형 적색, 녹색, 및 청색 형광체 입자를 표면 처리하는 것을 포함하는, 휘도 및 열화특성이 개선된 형광체의 제조방법을 제공한다.In particular, the present invention provides a method for producing a phosphor having improved brightness and deterioration characteristics, including surface treatment of spherical red, green, and blue phosphor particles produced by a spray pyrolysis process.
또한, 본 발명은 상기 방법에 의해 제조된, 표면 처리된 형광체 입자 및 이로부터 형성된 형광층을 포함하는 제품을 제공한다.The present invention also provides a product comprising the surface-treated phosphor particles produced by the above method and a phosphor layer formed therefrom.
이하 본 발명을 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail.
본 발명에 따른 표면처리 공정에 이용될 수 있는 형광체 입자는 특히 분무열분해 공정에 의해 제조되는 구형의 형광체 입자로서, 적색((Y,Gd)BO3:Eu, Y2O3 :Eu, Gd2O3:Eu), 녹색(Zn2SiO4:Mn, YBO3:Tb, BaAl12 O19:Mn), 청색 (BaMgAl10O17:Eu,BAM: Eu) 형광체 입자일 수 있다. 이들 구형 형광체 입자는 공지의 방법으로 제조될 수 있다. 예를 들면, 구형 BAM:Eu 형광체 입자는 알루미늄 염 용액에 해당량의 바륨(Ba) 화합물, 마그네슘(Mg) 화합물 및 유로피움(Eu) 화합물을 용해시켜 형광체 전구체 용액을 제조하고, 상기 전구체 용액을 분무장치에 투입하여 액적을 형성시키고, 상기 액적을 건조 및 열분해시키고, 수득된 입자를 열처리함으로써 제조할 수 있다.Phosphor particles that can be used in the surface treatment process according to the present invention are spherical phosphor particles, in particular produced by spray pyrolysis process, red ((Y, Gd) BO 3 : Eu, Y 2 O 3 : Eu, Gd 2 O 3 : Eu), green (Zn 2 SiO 4 : Mn, YBO 3 : Tb, BaAl 12 O 19 : Mn), blue (BaMgAl 10 O 17 : Eu, BAM: Eu) phosphor particles. These spherical phosphor particles can be produced by a known method. For example, spherical BAM: Eu phosphor particles dissolve the corresponding amounts of barium (Ba) compound, magnesium (Mg) compound and europium (Eu) compound in an aluminum salt solution to prepare a phosphor precursor solution, and the precursor solution It can be prepared by introducing into a spray apparatus to form droplets, drying and pyrolyzing the droplets, and heat treating the obtained particles.
제조되어진 구형의 형광체의 표면처리는, 표면에 친수성 기, 예를 들면 하이드록실기(-OH)를 가진 구형의 형광체 입자를 알콜 혹은 알콜-실란 혼합액에 넣고 반응시켜 형광체 입자의 표면의 친수성 하이드록실기(-OH)를 알콜과 반응시켜 알킬기나 아릴옥시(aryloxy)기로 치환하는 반응과 표면의 하이드록실기(-OH)그룹을 실란과 반응시켜 오가노실란기로 치환하는 반응을 수행함으로써 수행된다.Surface treatment of the prepared spherical phosphor is carried out by reacting spherical phosphor particles having a hydrophilic group on the surface, for example, hydroxyl group (-OH), in an alcohol or alcohol-silane mixture solution and reacting the hydrophilic hydroxide on the surface of the phosphor particles. The reaction is carried out by reacting a group (-OH) with an alcohol to replace an alkyl group or an aryloxy group, and by reacting a surface hydroxyl group (-OH) with a silane to replace an organosilane group.
본 발명에 사용할 수 있는 알콜은 탄소수 1 내지 12개의 것으로, 바람직하게는 메탄올, 에탄올 또는 프로판올이며, 실란으로는 알킬트리알콕시실란(R'Si(OR)3, 여기서 R 및 R'는 각각 탄소수 1 내지 12개의 알킬이다)을 사용할 수 있으며, 바람직하게는 OTES(옥틸트리에톡시실란), 실라트란글리콜 등을 사용할 수 있다.Alcohols that can be used in the present invention are those having 1 to 12 carbon atoms, preferably methanol, ethanol or propanol, and as the silane, an alkyltrialkoxysilane (R'Si (OR) 3 ), where R and R 'are each 1 To 12 alkyl), and preferably, OTES (octyltriethoxysilane), silatran glycol, or the like can be used.
상기 알콜을 사용하는 경우는 출발 형광체 1g당 알콜 1 내지 100ml 범위의 양을 사용할 수 있으며, 알콜-실란 혼합액을 사용하는 경우는 출발 형광체 1g당 알콜 1 내지 100ml와 실란 0.00001 내지 0.01 g 범위의 양을 사용할 수 있다. 가장 바람직하게는 알콜은 출발 형광체 1g당 대략 10ml, 실란은 0.004 내지 0.005g범위 정도이다.In the case of using the alcohol, an amount in the range of 1 to 100 ml of alcohol may be used per 1 g of the starting phosphor, and in the case of using an alcohol-silane mixture, an amount in the range of 1 to 100 ml of alcohol and 0.00001 to 0.01 g of the silane may be used per 1 g of the starting phosphor. Can be used. Most preferably the alcohol is in the range of about 10 ml per gram of starting phosphor and in the range of 0.004 to 0.005 g of silane.
상기 표면처리 반응은 50 내지 200 ℃ 범위의 온도 및 2분 내지 2시간 범위의 시간 동안 수행할 수 있다. The surface treatment reaction may be carried out for a temperature in the range of 50 to 200 ℃ and a time in the range of 2 minutes to 2 hours.
상기와 같이 표면처리된 구형 형광체 입자는 100 내지 200 ℃ 범위의 온도에서 1 내지 2 시간동안 건조함으로써 최종 처리된 형광체 입자를 수득할 수 있다. The spherical phosphor particles surface-treated as described above may be dried for 1 to 2 hours at a temperature in the range of 100 to 200 ° C. to obtain final treated phosphor particles.
본 발명의 방법에 따르면, 구형 형광체의 표면에 알킬기, 아릴옥시기 혹은 오가노실란기를 형성하므로써 형광체 표면의 소수성을 증가시켜 열화특성이 개선 될 뿐만 아니라 초기 발광특성이 크게 향상된 형광체를 제조할 수 있으며, 이는 박형화와 경량화된 차세대 평판디스플레이의 고효율화 및 고휘도화를 위한 형광체로서 유용하게 사용될 수 있다. According to the method of the present invention, by forming an alkyl group, an aryloxy group or an organosilane group on the surface of the spherical phosphor to increase the hydrophobicity of the surface of the phosphor to improve the deterioration characteristics as well as to significantly improve the initial luminescence characteristics can be produced This can be usefully used as a phosphor for high efficiency and high brightness of thin and lightweight next-generation flat panel displays.
본 발명은 하기에 청색(BAM:Eu) 형광체를 실시예로 하여 보다 더 자세히 설명하는 바, 하기의 실시예는 본 발명의 예시 목적을 위한 것이며 첨부된 특허청구범위에 의하여 한정되는 보호범위를 제한하지 않음은 당업계에서 통상적인 지식을 가진 자에게 자명할 것이다.The present invention will be described in more detail with reference to the blue (BAM: Eu) phosphor as an example, the following examples are for the purpose of illustration of the invention and limit the scope of protection defined by the appended claims. Not to be evident to those of ordinary skill in the art.
제조예: Ba0.9MgAl10O17:Eu0.1 (BAM:Eu) 형광체 분말의 제조Preparation Example: Preparation of Ba 0.9 MgAl 10 O 17 : Eu 0.1 (BAM: Eu) Phosphor Powder
원료물질로서, 알루미늄(Al), 마그네슘(Mg) 및 바륨(Ba)의 질산염과 유로피움(Eu) 산화물을 사용하여 용액의 총 농도가 0.8M이 되도록 분무 용액을 제조하였다. 구체적으로, 증류수 90㎖에 알루미늄 질산염 25.01g을 넣고 염기성 첨가제로서 암모니아수 11㎖ 첨가하여 알루미늄 중합 양이온 용액(pH=4.2)을 제조하였으며, 여기에 바륨 질산염 1.57g, 마그네슘 질산염 1.71g 및 유로피움 산화물 0.117g을 첨가하여 상기 표제와 같은 조성을 가지는 전구체 용액을 제조하였다. 이렇게 준비된 전구체 용액을 초음파 분무장치에 넣고 수 마이크론 크기의 액적으로 발생시켰으며, 발생된 액적들을 반응기의 온도 900℃에서 압축공기를 45ℓ/min으로 흘려주면서 건조 및 열분해시켜 분말을 얻었다. 상기 분무열분해법에 의해 얻어진 분말들은 암모니아수의 첨가 유무와 무관하게 Ba0.9MgAl10O17:Eu0.1 의 결정성을 가지나, 반응기 온도가 낮고 체류시간이 짧기 때문에 충분히 결정화가 이루어지지 않으므로, 1400℃에서 2시간 동안 환원 분위기(25%의 수소/질소 혼합가스)에서 열처리하여 BAM 분말을 수득하였다.As a raw material, a spray solution was prepared using nitrates of aluminum (Al), magnesium (Mg) and barium (Ba) and europium (Eu) oxide so that the total concentration of the solution was 0.8M. Specifically, 25.01 g of aluminum nitrate was added to 90 ml of distilled water, and 11 ml of ammonia water was added as a basic additive to prepare an aluminum polymerized cation solution (pH = 4.2), including 1.57 g of barium nitrate, 1.71 g of magnesium nitrate, and 0.117 europium oxide. g was added to prepare a precursor solution having the same composition as above. The prepared precursor solution was placed in an ultrasonic nebulizer and generated droplets having a size of several microns, and the resulting droplets were dried and pyrolyzed while flowing compressed air at 45 L / min at a temperature of 900 ° C. in the reactor to obtain a powder. The powders obtained by the spray pyrolysis method had a crystallinity of Ba 0.9 MgAl 10 O 17 : Eu 0.1 regardless of the addition of ammonia water, but due to the low reactor temperature and short residence time, the crystallization was not sufficiently achieved. BAM powder was obtained by heat treatment in a reducing atmosphere (25% hydrogen / nitrogen mixed gas) for 2 hours.
실시 예 1 : 에탄올을 이용한 BAM:Eu 입자의 표면처리Example 1 Surface Treatment of BAM: Eu Particles Using Ethanol
항온조에 설치된 둥근 바닥 2구 플라스크에, 표면에 친수성 하이드록실기(-OH)를 가진 제조예의 구형 BAM:Eu 청색 형광체 입자 5g을 넣고 에탄올 100ml를 넣은 후 항온조의 온도를 100℃로 유지하였다. 플라스크 내의 에탄올이 끓은 후 30분 동안 유지한 후 입자를 회수하여 100℃에서 2시간 동안 건조하였다. In a round-bottom two-necked flask installed in a thermostat, 5 g of spherical BAM: Eu blue phosphor particles of Preparation Example having a hydrophilic hydroxyl group (-OH) on the surface thereof, 100 ml of ethanol were added thereto, and the temperature of the thermostat was maintained at 100 ° C. After boiling the ethanol in the flask was maintained for 30 minutes, the particles were recovered and dried at 100 ℃ for 2 hours.
실시예 2-4 : 에탄올과 OTES(옥틸트리에톡시실란)을 이용한 BAM:Eu 입자의 표면처리Example 2-4 Surface Treatment of BAM: Eu Particles Using Ethanol and OTES (Octyltriethoxysilane)
상기 실시 예 1과 동일한 성분을 사용하여 동일한 방법으로 형광체 입자를 표면 처리하되, 표 1에 나타난 바와 같이 OTES의 첨가비율을 달리하여 형광체 입자를 표면 처리하였다.The phosphor particles were surface-treated in the same manner using the same components as in Example 1, but the phosphor particles were surface-treated by varying the addition ratio of OTES as shown in Table 1.
실시예 5 : 프로판올을 이용한 BAM:Eu 입자의 표면처리Example 5 Surface Treatment of BAM: Eu Particles Using Propanol
상기 실시 예 1에서 에탄올 대신 프로판올을 사용하여 동일한 방법으로 형광체 입자를 표면 처리하였다. In Example 1, the phosphor particles were surface-treated in the same manner using propanol instead of ethanol.
실시예 6-9 : 프로판올과 OTES를 이용한 BAM:Eu 입자의 표면처리 Example 6-9 Surface Treatment of BAM: Eu Particles Using Propanol and OTES
상기 실시 예 2-4에서 에탄올 대신 프로판올을 사용하여 동일한 방법으로 형광체 입자를 표면 처리하였다.In Example 2-4, the phosphor particles were surface-treated in the same manner using propanol instead of ethanol.
발광 특성 시험Luminescent property test
실시 예 1∼4에 의해 표면 처리되어진 형광체 입자와 비교 예(무처리)의 형광체 분말을 진공자외선(147nm) 영역 하에서 발광 스펙트럼을 나타내었다(도 1 참조). 실시 예 1∼4에 의해 표면 처리되어진 형광체 입자와 비교 예(무처리)의 형광체 분말의 열화 특성을 조사하기 위하여 유기 바인더와 1:1(wt%)로 혼합하여 박스형태의 전기로를 이용하여 450℃에서 30분 동안 열처리하였다. The phosphor particles surface-treated in Examples 1 to 4 and the phosphor powder in Comparative Example (untreated) showed emission spectra under a vacuum ultraviolet (147 nm) region (see FIG. 1). In order to investigate the deterioration characteristics of the phosphor particles surface-treated in Examples 1 to 4 and the phosphor powder of Comparative Example (untreated), the mixture was mixed with an organic binder in a ratio of 1: 1 (wt%) by using a box-type electric furnace 450 Heat treatment was carried out for 30 minutes at ℃.
도 1로부터, OTES의 량이 증가할수록 열화전의 발광휘도는 무처리에 비해 증가함을 알 수 있다. 또, 열화 후에는 0.004 OTES(g/gBAM)까지는 증가하다가 0.006 OTES(g/gBAM)을 초과하였을 때는 휘도가 무처리 보다 감소하였다. 1, it can be seen that as the amount of OTES increases, the luminance of light emission before deterioration increases as compared with no treatment. In addition, after deterioration, the luminance increased up to 0.004 OTES (g / gBAM), but when it exceeded 0.006 OTES (g / gBAM), the luminance was lower than that of no treatment.
또한, 실시 예 5∼9에 의해 표면 처리되어진 형광체 입자와 비교 예(무처리)의 형광체 분말을 진공자외선(147nm) 영역 하에서 발광 스펙트럼을 나타내었다(도 2 참조). In addition, the phosphor particles surface-treated in Examples 5 to 9 and the phosphor powder of Comparative Example (untreated) showed emission spectra under a vacuum ultraviolet (147 nm) region (see FIG. 2).
도 2로부터, OTES의 량이 증가할수록 열화전의 발광휘도는 무처리에 비해 증가함을 알 수 있다. 또, 열화 후에는 0.005 OTES(g/gBAM)까지는 증가하다가 0.006 OTES(g/gBAM)을 초과하였을 때는 휘도가 무처리 보다 감소하였다. From FIG. 2, it can be seen that as the amount of OTES increases, the luminance of light emitted before deterioration increases as compared with no treatment. In addition, after deterioration, the luminance increased up to 0.005 OTES (g / gBAM), but when it exceeded 0.006 OTES (g / gBAM), the luminance was lower than that of no treatment.
아울러, 실시 예 4 및 9에 의해 표면 처리되어진 형광체 입자와 비교 예(무처리) 및 상용(KASEI사)제품의 형광체 분말에 대해 파장 변화에 따른 발광 스펙트럼을 나타내었다(도 3 참조). In addition, the emission spectra of the phosphor particles surface-treated in Examples 4 and 9 and the phosphor powders of Comparative Examples (no treatment) and commercial (KASEI) products were shown according to wavelength changes (see FIG. 3).
도 3에 따르면, 알콜과 OTES로 표면 처리되어진 구형의 BAM:Eu 형광체 입자가 무처리보다 6%정도 좋은 특성을 나타내었고, 상용제품 보다는 3%정도 좋은 발광 특성을 보였다. According to Figure 3, the spherical BAM: Eu phosphor particles surface-treated with alcohol and OTES showed about 6% better than the untreated, 3% better than the commercial products showed a light emission characteristics.
상술한 바와 같이, 본 발명의 방법에 따르면 형광체 입자, 특히 분무열분해 공정에 의해 제조된 구형의 형광체 입자를 알콜 혹은 알콜-실란 혼합액을 이용하여 표면의 친수성기를 알킬기, 아릴옥시 혹은 오가노실란기로 치환반응시키므로써 형광체 입자 표면의 소수성을 증가시켜 열화특성이 개선되고 광 특성이 좋은 형광체를 제조할 수 있으며, 이는 박형화와 경량화가 용이한 차세대 프라즈마 평판디스플레이의 고휘도화를 위한 형광체로서 유용하게 사용될 수 있다.As described above, according to the method of the present invention, the phosphor particles, in particular spherical phosphor particles produced by the spray pyrolysis process, are substituted with an alkyl group, an aryloxy or an organosilane group using an alcohol or an alcohol-silane mixture. By increasing the hydrophobicity of the surface of the phosphor particles by the reaction can improve the deterioration characteristics and excellent phosphors can be produced, which can be useful as a phosphor for high brightness of the next-generation plasma flat panel display that is easy to thin and lightweight .
도 1 및 도 2는 본 발명에 따라 다양한 양의 알콜 또는 알콜-OTES 혼합액으로 표면처리된 BaMgAl10O17:Eu(BAM:Eu) 형광체분말을 표면처리하지 않은 것과 발광세기를 비교하여 나타낸 스펙트럼이고,1 and 2 are spectrums showing the luminescence intensity of the BaMgAl 10 O 17 : Eu (BAM: Eu) phosphor powder surface-treated with various amounts of alcohols or alcohol-OTES mixtures according to the present invention. ,
도 3은 본 발명에 따라 표면처리된 BaMgAl10O17:Eu 형광체 분말을 상용제품 및 표면처리하지 않은 분말과 비교하여 파장에 따른 발광세기를 비교하여 나타낸 스펙트럼이다.3 is a spectrum showing the luminescence intensity according to the wavelength compared to the BaMgAl 10 O 17 : Eu phosphor powder surface-treated according to the present invention compared to commercial products and untreated surface powder.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104789207A (en) * | 2015-03-23 | 2015-07-22 | 中山大学 | Hydrophilic rare earth ion-doped nanophosphor and preparation method and application thereof |
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| KR100728378B1 (en) * | 2005-08-29 | 2007-06-13 | 대한광업진흥공사 | Preparation of Spherical Rare Earth Red Phosphor Particles by Droplet to Particle Conversion |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0183966B1 (en) * | 1988-12-21 | 1999-03-20 | 데니스 에이치. 어얼벡 | Surface treatment of phosphor particles and method for a crt screen |
| KR20010044755A (en) * | 2001-03-22 | 2001-06-05 | 유재수 | Synthesizing method and apparatus of spherical powder |
| KR20020019828A (en) * | 2000-09-07 | 2002-03-13 | 김충섭 | Process for green phosphor particles with spherical shape |
| KR20020046101A (en) * | 2000-12-12 | 2002-06-20 | 김충섭 | Preparation of red phosphor particles for PDP by spray pyrolysis |
| KR20020084502A (en) * | 2001-05-02 | 2002-11-09 | 한국화학연구원 | Preparation method of blue and green emitting aluminate phosphor particles |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0183966B1 (en) * | 1988-12-21 | 1999-03-20 | 데니스 에이치. 어얼벡 | Surface treatment of phosphor particles and method for a crt screen |
| KR20020019828A (en) * | 2000-09-07 | 2002-03-13 | 김충섭 | Process for green phosphor particles with spherical shape |
| KR20020046101A (en) * | 2000-12-12 | 2002-06-20 | 김충섭 | Preparation of red phosphor particles for PDP by spray pyrolysis |
| KR20010044755A (en) * | 2001-03-22 | 2001-06-05 | 유재수 | Synthesizing method and apparatus of spherical powder |
| KR20020084502A (en) * | 2001-05-02 | 2002-11-09 | 한국화학연구원 | Preparation method of blue and green emitting aluminate phosphor particles |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104789207A (en) * | 2015-03-23 | 2015-07-22 | 中山大学 | Hydrophilic rare earth ion-doped nanophosphor and preparation method and application thereof |
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| KR20040042241A (en) | 2004-05-20 |
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