KR910008346B1 - Blue pigment fluorescent substance - Google Patents
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- KR910008346B1 KR910008346B1 KR1019880008665A KR880008665A KR910008346B1 KR 910008346 B1 KR910008346 B1 KR 910008346B1 KR 1019880008665 A KR1019880008665 A KR 1019880008665A KR 880008665 A KR880008665 A KR 880008665A KR 910008346 B1 KR910008346 B1 KR 910008346B1
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- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
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Abstract
Description
본 발명은 안료 입자를 형광체 표면에 피복시킨 형광체(이하 안료 부착 형광체라 함)에 관한 것으로, 특히 칼라 텔레비젼용 음극선관에 사용되는 청색안료 부착 형광체로서 유기 바인더를 전혀 사용하지 않고 단순히 표면 처리물을 이용하여 안료 코팅 공정과 표면처리 공정을 실시할 수 있도록 한 청색안료 부착 형광체 및 그 제조방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to phosphors coated with pigment particles on a phosphor surface (hereinafter referred to as phosphors with pigments). In particular, a phosphor with blue pigment used in a cathode ray tube for color television, which does not use any organic binder and simply uses a surface treatment product. The present invention relates to a blue pigment-based fluorescent substance and a method for producing the same, which enable the pigment coating step and the surface treatment step to be performed.
일반적으로 칼라브라운관에 사용되는 형광체는 패널에 형성된 형광막 자체의 반사율을 저하시킴으로써 콘트라스트를 향상시키기 위해 형광체 표면에 안료를 코팅시키는 방법이 사용되고 있다. 그런데 형광체의 반사율을 저하시키기 위한 하나의 방법으로서, 흑색안료를 사용하는 것이 효과적이기는 하나, 흑색안료는 외광을 흡수하는 형광체 자체의 발광을 흡수하는 결점이 있어, 통상적으로 형광체의 발광색과 동일한 색상의 안료를 동시에 형광체 표면에 코팅하여 사용하고 있다.In general, the phosphor used for the color CRT is used to coat the pigment on the surface of the phosphor in order to improve the contrast by lowering the reflectance of the phosphor film itself formed on the panel. By the way, as a method for reducing the reflectance of the phosphor, it is effective to use black pigment, but black pigment has a drawback of absorbing the light emission of the phosphor itself absorbing external light, it is usually of the same color as the emission color of the phosphor Pigments are simultaneously coated and used on the surface of the phosphor.
이와 같이 형광체에 부착하는 안료는 브라운관 제조공정의 특성상 열에 강하고, 화학적으로도 안정한 것이 필요한 바, 통상적인 안료의 입경은 1㎛이하로서 형광체와 분리되게 되므로 분산성이 나빠 우수한 형광막을 만들기가 곤란하게 된다. 따라서 형광체 표면에 안료를 부착시키기 위해 접착제(binder)가 필요하게 되는 바, 바인더로는 무기물, 유기물이 알려져 있으나 접착력의 강도라던가 베이킹 공정에서 PVA와 동시에 분해 제거되는 것을 고려하면 유기물 바인더가 많이 사용되고 있다.As such, the pigment attached to the phosphor is resistant to heat and chemically stable due to the characteristics of the CRT manufacturing process. Since the particle size of a conventional pigment is 1 μm or less, the pigment is separated from the phosphor, so that it is difficult to make an excellent fluorescent film having poor dispersibility. do. Therefore, an adhesive (binder) is required to attach the pigment to the surface of the phosphor. Inorganic and organic materials are known as binders. However, organic binders are widely used in consideration of the strength of the adhesive force and the decomposition and removal at the same time as PVA in the baking process. .
종래에도 안료입자의 형광체 표면 부착강도 및 분산성이 우수한 안료 부착형광체의 제조방법으로서, 정전도포법에 이라던가, 현탁 중합법, 공중합법, 또는 젤라틴(gellatin)과 아라비아 고무와의 혼합물을 접착제로 이용하는 제조방법등이 제안되어 있다.Conventionally, as a method for producing a pigment-attached phosphor excellent in phosphor surface adhesion strength and dispersibility of pigment particles, such as electrostatic coating method, suspension polymerization method, copolymerization method, or a mixture of gelatin and gum arabic as an adhesive Manufacturing methods and the like have been proposed.
또한 형광체 입자가 외부에서 받는 압력 및 충격력등과 같은 물리적인 힘에 의해 파괴되는 경우라던가, 표면에서의 화학적변화, 브라운관 제작시 가열에 의한 열화, 불순물 확산에 의한 발광효율의 저하, 발광색의 변화, 형광체 입자간의 응집방지, 슬러리 조합시의 분산성 향상을 위해 형광체 표면에 표면처리를 실시하고 있다.In addition, when the phosphor particles are destroyed by physical forces such as pressure and impact force received from the outside, chemical changes on the surface, deterioration by heating during CRT production, deterioration of luminous efficiency due to diffusion of impurities, change in emission color, Surface treatment is performed on the surface of the phosphor in order to prevent aggregation between the phosphor particles and to improve dispersibility when the slurry is combined.
그런데 종래에는 화상의 콘트라스트를 향상시켜주기 위해 형광체표면에 안료를 부착시키는 안료 코팅공정과, 형광체의 응집방지라던가 분산성 향상 및 형광패널에의 도포성 향상등을 위해 형광체표면에 표면처리물을 석출시키는 표면처리공정이 각기 별도로 이루어지도록 되어, 제조공정이 번거로울 뿐만 아니라 설비가 부가되는등 생산성 및 경제성이 낮다고 하는 결점이 있고, 특히 종래의 안료코팅 공정에서는 유기 바인더를 사용하여 안료를 부착하기 때문에 PVA와의 친화성문제가 남게된다고 하는 결점이 있었다.However, conventionally, a pigment coating process for attaching the pigment to the surface of the phosphor to improve the contrast of the image, and to deposit the surface treatment on the surface of the phosphor for preventing the aggregation of the phosphor, improve the dispersibility, and improve the coating property on the fluorescent panel Each surface treatment process is to be done separately, and the manufacturing process is not only cumbersome, but also has the disadvantage of low productivity and economic efficiency, such as the addition of equipment. Particularly, in the conventional pigment coating process, PVA is used because organic pigments are used to attach the pigment. There was a flaw that the affinity problem with remained.
이에 본 발명은 상기와 같은 결점을 해결하기 위해 발명된 것으로, 유기 바인더를 사용하지 않고도 양호한 특성을 갖는 형광체를 제조할 수 있으면서 표면 처리 공정과 안료 코팅 공정을 동시에 실시함으로써 제조공정 및 설비를 간소화하여 생산성 및 경제성을 향상시킬 수 있도록 한 청색안료 부착 형광체 및 그 제조 방법을 제공함에 그 목적이 있다.Accordingly, the present invention has been invented to solve the above-mentioned drawbacks, and it is possible to manufacture a phosphor having good characteristics without using an organic binder while simultaneously performing a surface treatment process and a pigment coating process to simplify the manufacturing process and equipment. It is an object of the present invention to provide a blue pigment-containing phosphor and a method of manufacturing the same, which can improve productivity and economy.
상기와 같은 목적을 달성하기 위한 본 발명은, 청색 발광형광체인 ZnS : Ag,Cl에 순수를 가하여 교반시킨 뒤 소정량의 슬러리를 첨가하고, 이에 규산칼륨, 질산알루미늄, 황산아연용액 또는 이에 인산나트륨을 선택적으로 첨가한 다음 용액의 PH를 5-8로 조절하여 방치시킨후 수세, 건조시켜줌으로써 형광체에 안료를 코팅시킴과 동시에 표면처리를 해주도록 되어 형광체 제조공정의 간소화로 생산성 및 경제성을 특히 향상시킬 수 있도록 되어 있다.In order to achieve the above object, the present invention is a blue light emitting phosphor, ZnS: Ag, Cl is added to the pure water and stirred, and then a predetermined amount of slurry is added thereto, potassium silicate, aluminum nitrate, zinc sulfate solution or sodium phosphate Is added, and then the pH of the solution is adjusted to 5-8, left to stand, washed with water and dried to coat the pigment with the surface treatment and surface treatment at the same time. It is supposed to be possible.
이하 본 발명의 실시예를 들어 상세히 설명한다.Hereinafter, the embodiment of the present invention will be described in detail.
[실시예 1]Example 1
청색 발광형광체(ZnS ; Ag, Cl)의 1Kg에 순수 2를 가하여 잘 교반하면서 청색 안료 슬러리 1500ml를 첨가한 뒤, 이 용액의 온도를 30∼70℃로 유지하면서 규산칼륨(Potassium Silicate)용액 20ml, 2% 질산알루미늄용액 8ml, 2% 황산아연 용액 22.5ml를 순서대로 가하고 나서 IN-HNO3를 이용하여 최종 PH를 5-8로 조절한 다음, 이상태로 소정시간에서 8시간 건조시킨뒤 마무리 체(400mesh)로 최종 체질하여 청색 안료 부착 형광체를 얻었다.Pure water 2 was added to 1 Kg of the blue light emitting phosphor (ZnS; Ag, Cl), and 1500 ml of the blue pigment slurry was added while stirring well, and then 20 ml of potassium silicate (Potassium Silicate) solution was maintained at 30 to 70 ° C. After adding 8 ml of 2% aluminum nitrate solution and 22.5 ml of 2% zinc sulfate solution in that order, the final pH was adjusted to 5-8 using IN-HNO 3 , and then dried in this state for 8 hours at a predetermined time. 400 mesh) to final sieving to obtain a blue pigment attached phosphor.
이와 같이 하여 얻어진 본 발명의 1실시예에 따른 청색 안료 부착 형광체는 기존의 유기 바인더를 사용하여 안료를 부착시킨 형광체와 동등한 특성을 얻을 수 있다.The blue pigment-containing phosphor according to the embodiment of the present invention thus obtained can obtain properties equivalent to those of the phosphor to which the pigment is attached using an existing organic binder.
본 실시예 1에서 상기 규산칼륨 용액에서, SiO2량은 0.01∼2.0중량%인 것이 바람직한 것으로 나타났는바, 여기서 상기 SiO2은 용액중에서 석출되어 형광체 입자와의 표면전위 및 정전기적 인력에 의해 형광체 표면에 안료를 부착시키는 바인더 물질로서의 역할을 하게됨과 더불어 안료표면에 코팅막을 형성시켜 표면처리를 하도록 된 것으로서, 이와 같은 SiO2는 그 양에 따라 안료 부착 상태 및 표면처리 상태에 큰 영향을 주게된다.In the potassium silicate solution of Example 1, it was found that the amount of SiO 2 is preferably 0.01 to 2.0% by weight, in which the SiO 2 is precipitated in the solution and the phosphor is discharged by surface potential and electrostatic attraction with the phosphor particles. In addition to acting as a binder material for attaching the pigment to the surface and to form a coating film on the surface of the pigment to perform the surface treatment, such SiO 2 has a large effect on the pigment adhesion state and surface treatment state depending on the amount. .
즉 본 발명의 반복실험 결과, 상기 SiO2량이 0.01중량% 이하인 경우에는 형광체 표면에 부착되는 안료의 부착력이 저하되어 안료가 균일하게 부착되지 못함으로써 형광체의 발광특성을 향상시킬 수 없게 되는 한편, 상기 SiO2량이 2.0중량% 이상인 경우에는 과다한 바인더 물질이 생성됨으로서 안료가 부착된 형광체 표면에 과잉의 코팅막이 형성되어 형광체의 응집에 따른 분사성의 저하로 최종 형광막을 형성해 줄 때 형광체가 탈락되는 등 충진밀도가 감소되어 휘도 특성이 현저하게 저하됨을 알 수 있었다.That is, as a result of the repeated experiment of the present invention, when the amount of SiO 2 is 0.01% by weight or less, the adhesion force of the pigment adhered to the surface of the phosphor is lowered, so that the pigment is not uniformly attached, thereby improving the luminescence properties of the phosphor. When the amount of SiO 2 is 2.0% by weight or more, an excessive amount of binder material is generated, so that an excessive coating film is formed on the surface of the phosphor to which the pigment is attached. It can be seen that the brightness characteristic is significantly reduced due to the decrease.
[실시예 2]Example 2
규산칼륨(Potassium Silicate)용액 30ml, 2 인산나트륨(Sodium Diphosphate)용액 18ml를 첨가하여 실시한 것외에는 실시예 1과 동일한 방법으로 형광체를 제조하였는바, 본 실시예 2에서 첨가되는 인산나트륨 용액은 휘도상승제로서 반복실험결과 인산나트륨량이 0.001∼0.2중량% 정도 범위가 적합한 것으로 나타났다.A phosphor was prepared in the same manner as in Example 1 except that 30 ml of potassium silicate solution and 18 ml of sodium diphosphate solution were added. As a result of repeated experiments, sodium phosphate was found to be in a range of about 0.001 to 0.2% by weight.
이와 같이 본 발명 실시예 2에 따라 제조된 청색 안료 부착 형광체는 실시예 1에 의하여 제조된 형광체 보다 안료 부착력이 강할 뿐만 아니라 표면처리 상태가 양호하여 분산성 및 도포성 테스트 결과 양호한 형광막을 제조할 수 있었다.As described above, the blue pigment-attached phosphor prepared according to Example 2 of the present invention not only has stronger pigment adhesion than the phosphor prepared in Example 1, but also has a good surface treatment state, so that a good fluorescent film can be produced as a result of dispersibility and coating test. there was.
한편, 상기와 같은 본 발명 실시예 1,2에 따라 제조된 형광체는 종래 유기 바인더를 사용하여 안료를 부착시킨 형광체보다 안료 응집 및 형광체 응집이 거의 없어져서 입도 분포도가 향상될 뿐만 아니라, 형광막 형성시 막 충진 밀도가 우수하여 브라운관의 휘도 특성을 향상시킬 수 있는바, 즉 종래 방법에 따른 형광체는, 안료 코팅 전후의 휘도차가 10% 정도의 차이를 나타내나 본 발명 방법에 따른 형광체는 안료 코팅전후의 휘도 저하율을 3-5% 정도로 줄일 수 있고, 또한 본 발명은 유기 바인더를 사용하지 않고 SiO2석출물에 의한 바인더 기능 및 표면 코팅을 얻음과 더불어 휘도상승제인 인산을 첨가함으로써 감광성 수용액 중에서의 분산성이 양호하고 형광막 제조시의 도포성을 항상시킬 수 있음과 동시에 제조공정 및 설비의 단순화로 생산성 및 경제성을 향상시킬 수 있는 효과가 있다.On the other hand, the phosphors prepared according to Examples 1 and 2 of the present invention as described above have almost no pigment agglomeration and phosphor agglomeration than the phosphors to which the pigment is attached using an organic binder, thereby improving the particle size distribution and forming the fluorescent film. Since the film packing density is excellent, the luminance characteristics of the CRT can be improved. That is, the phosphor according to the conventional method exhibits a difference of about 10% in the luminance difference before and after the pigment coating. The luminance reduction rate can be reduced to about 3-5%. In addition, the present invention obtains a binder function and surface coating by SiO 2 precipitate without using an organic binder, and adds phosphoric acid, which is a brightness increasing agent, to improve dispersibility in an aqueous photosensitive solution. It is good and can improve the applicability in the manufacture of fluorescent film, and at the same time, productivity and lightness are simplified by simplifying the manufacturing process and equipment. There is an effect that can improve the castle.
Claims (4)
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| KR1019880008665A KR910008346B1 (en) | 1988-07-12 | 1988-07-12 | Blue pigment fluorescent substance |
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| KR1019880008665A KR910008346B1 (en) | 1988-07-12 | 1988-07-12 | Blue pigment fluorescent substance |
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| KR910008346B1 true KR910008346B1 (en) | 1991-10-12 |
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1988
- 1988-07-12 KR KR1019880008665A patent/KR910008346B1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR900001819A (en) | 1990-02-27 |
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