KR0178976B1 - Red phosphor for low speed electron beam and manufacturing method thereof - Google Patents

Red phosphor for low speed electron beam and manufacturing method thereof Download PDF

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KR0178976B1
KR0178976B1 KR1019900011276A KR900011276A KR0178976B1 KR 0178976 B1 KR0178976 B1 KR 0178976B1 KR 1019900011276 A KR1019900011276 A KR 1019900011276A KR 900011276 A KR900011276 A KR 900011276A KR 0178976 B1 KR0178976 B1 KR 0178976B1
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red phosphor
phosphor
electron beam
low
indium oxide
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KR1019900011276A
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Korean (ko)
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KR920002735A (en
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김웅수
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손욱
삼성전관주식회사
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Priority to CN91105778A priority patent/CN1059355A/en
Priority to DE4124450A priority patent/DE4124450A1/en
Priority to JP3274472A priority patent/JPH04314781A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/20—Luminescent screens characterised by the luminescent material
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/54—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing zinc or cadmium
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
    • C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/58—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing copper, silver or gold
    • C09K11/582—Chalcogenides
    • C09K11/584—Chalcogenides with zinc or cadmium

Abstract

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Description

저속전자선용 적색형광체 및 그 제조방법Red phosphor for low speed electron beam and manufacturing method thereof

제1도는 종래의 슬러리 상태의 형광물질을 확대한 도면 대용사진.1 is a drawing substitute photograph of an enlarged conventional fluorescent substance in the state of the slurry.

제2도는 이 발명에 따른 슬러리 상태의 형광물질을 확대한 도면 대용 사진이다.FIG. 2 is an enlarged photograph of a drawing of a fluorescent substance in a slurry state according to the present invention. FIG.

이 발명은 저속전자선용 적색형광체와 그 제조방법에 관한 것으로서, 더욱 상세하게는 형광표시관(Vacuum Fluorescent Display)등의 저속 전자선을 이용한 표시기에 있어서, 적색 휘도를 높여 주도록 한 적색형광체 및 그 제조방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a red phosphor for a low speed electron beam and a method of manufacturing the same. More particularly, a red phosphor and a method for manufacturing the same in a display using a low speed electron beam such as a fluorescent display tube (Vacuum Fluorescent Display) It is about.

일반적으로 VFD와 같은 저속전자선용의 표시기는 저전압(일예로 20V)으로 구동하며 그 용도는 자동차, 항공기 등의 계기판이나 디지털시계, 전자계산기등 광범위한 분야의 디스플레이용으로 많이 활용되고 있다. 일예로 저속전자선용 형광체를 사용하는 형광표시관은 고진공 상태하에서 음극에 일정전압을 인가하면 이 음극에서 열전자가 방출되고 그리드에서 형성된 일정전압을 인가하면 이 음극에서 열전자가 방출되고 그리드에서 형성된 전계에 의해 가속 및 제어되어 애노드에 도달하게 되는데, 이 애노드상에 도포된 저속전자선용 R(레드), G(그린), B(블루) 형광체를 여기시켜 형광체가 발광하게 된다.In general, an indicator for a low-speed electron beam such as VFD is driven at a low voltage (for example, 20V), and its use is widely used for display panels of a wide range of fields such as dashboards of automobiles and aircrafts, digital clocks, and electronic calculators. For example, a fluorescent display tube using a low-speed electron beam phosphor emits hot electrons from the cathode when a constant voltage is applied to the cathode under high vacuum, and hot electrons are emitted from the cathode and applied to an electric field formed from the grid when a constant voltage is formed on the grid. This is accelerated and controlled to reach the anode. The phosphor emits light by exciting R (red), G (green), and B (blue) phosphors for the low-speed electron beam applied on the anode.

여기서, 상기 그린(Green)형광체는 주성분이 매우 저저항인 아연(Zn)으로 되어 낮은 전압으로도 양호한 발광이 이루어지게 된다. 그러나 레드(Red) 형광체는 그 성분이 (Zn, Cd)S : Ag, Cl로 이루어져 있으며, 특히 저저항인 Zn(아연)의 조성비가 매우 낮고 고저항을 갖는 Cd(카드뮴)의 조성비가 매우 높아 적색형광체는 전체적으로 고저항성으로 된다.Here, the green phosphor is made of zinc (Zn) whose main component is very low resistance, so that good light emission is achieved even at a low voltage. However, the red phosphor is composed of (Zn, Cd) S: Ag, Cl, and the composition ratio of Zn (zinc), which is low resistance, is very low, and the composition ratio of Cd (cadmium), which has high resistance, is very high. The red phosphor becomes high resistance overall.

이러한 성분으로 인하여 저전압(20V)을 인가하면 그린 형광체에서는 전류가 잘 흐르게 되나, 적색형광체는 전류가 거의 흐르지 않게 되어 적색형광체의 표면에서 대전이 발생하였다. 따라서 적색형광체의 발광이 거의 이루어지지 않게 되고, 발광이 되어도 그 휘도가 매우 낮게 되었으며 이러한 문제는 고전압을 인가하면 해소되나 저속전자선용이므로 고전압을 인가하면 형광체가 소손되어 수명이 매우 짧은 문제가 있게 된다.Due to such a component, when a low voltage (20V) is applied, current flows well in the green phosphor, but little current flows in the red phosphor, and charging occurs on the surface of the red phosphor. Therefore, the red phosphor hardly emits light, and its luminance becomes very low even when light is emitted. This problem is solved by applying a high voltage. However, since a low voltage electron beam is applied, the phosphor is burned out and the life is very short. .

이와같은 문제의 해결을 위해 종래의 방법에서는 상기 적색형광체를 형성할 때, 상기한 구성물인 (Zn, Cd)s : Ag, Cl로 이루어진 형광체에 도전성물질인 인듐옥사이드(In2O3)의 분말을 혼합한 후 슬러리 상태로 형성하여 적색형광체에 도전성물질인 인듐옥사이드의 입자가 부착되도록 하였다. 이와같은 적색형광체에 인듐옥사이드의 분말을 혼합시켜서 적색형광체를 전체적으로 저저항으로 되게 하여 대전을 방지함으로써 양호한 발광이 이루어지도록 하였다.In order to solve such a problem, in the conventional method, when the red phosphor is formed, a powder of indium oxide (In 2 O 3 ), which is a conductive material, is formed on the phosphor composed of the above-mentioned components (Zn, Cd) s: Ag and Cl. After mixing, the mixture was formed in a slurry state so that particles of indium oxide, which is a conductive material, were attached to the red phosphor. The powder of indium oxide was mixed with such a red phosphor to make the red phosphor as a low resistance as a whole to prevent charging, thereby achieving good light emission.

이와같은 종래의 방법은 상기한 인듐옥사이드의 혼합에 따른 부착에 의해 어느정도 적색형광체의 발광이 이루어지고 휘도 또한 어느정도는 개선되게 되었으나, 실용화하는 데에는 커다란 문제점이 있는 것이다. 즉, 기존의 적색형광체에 인듐옥사이드(In2O3)를 입자상태에서 혼합한 후 슬러리 상태로 형성하는 공정에 있어서, 비중이 작은 인듐옥사이드와 비중이 큰 적색형광체가 골고루 혼합되지 않고 형광체는 형광체대로, 인듐옥사이드는 인듐옥사이드대로 뭉쳐지게 된다.Such a conventional method has been made to emit light of the red phosphor to some extent by the adhesion due to the mixing of the indium oxide described above and the luminance is also improved to some extent, but there is a big problem in practical use. That is, in the process of mixing indium oxide (In 2 O 3 ) in the form of a slurry after mixing the existing red phosphor in the form of particles, indium oxide having a small specific gravity and a red phosphor having a large specific gravity are not evenly mixed and the phosphor is a phosphor. As such, the indium oxide is aggregated into the indium oxide zone.

제1도(도면대용 사진)는 이와같은 종래의 방법으로 제조된 적색형광체를 BPMA(Electron probe micro analysis)장치로 3200배 확대한 사진으로서, 작은 입자들의 덩어리는 도전성물질인 인듐옥사이드 들이 뭉쳐진 것이고 큰 입자는 적색형광체 입자이다.FIG. 1 is a 3200-fold magnification of a red phosphor manufactured by the conventional method using an electrophoresis probe micro analysis (BPMA) device. The mass of small particles is formed by agglomeration of conductive indium oxides. The particles are red phosphor particles.

이와같이 슬러리 상태에서 적색형광체에 인듐옥사이드가 부착되는 양이 매우 적고, 또한 각각 뭉쳐져 있게 되어 상호간에 서로 떨어져 있는 상태로 되므로 목적한 바를 이루기가 곤란하였다. 이러한 형광체는 발광시 휘도가 낮게 되고, 또한 그 부위마다 휘도가 다르게 되는 것이다.In this way, the amount of indium oxide adhered to the red phosphor in the slurry state is very small, and it is difficult to achieve the intended purpose because they are agglomerated and separated from each other. Such a phosphor has a low luminance at the time of light emission and has a different luminance for each part.

일반적으로 이러한 실험에서 형광체와 도전성물질(인듐옥사이드)의 부착 비율은 100 : 7이 최적의 조건으로 되나, 실제로는 이러한 비율로 형성하기가 곤란하였다. 따라서 저속전자용 형광체를 이용한 표시기의 제작시 제품의 불량률이 매우 높게 되어 제조원가가 고가로 되며 생산성 또한 크게 떨어지는 요인으로 되었다.In general, the adhesion ratio of the phosphor and the conductive material (indium oxide) in this experiment is 100: 7 is the optimum condition, but in practice it was difficult to form at this ratio. As a result, the defect rate of the product is very high when manufacturing the display using the phosphor for low-speed electrons, the manufacturing cost becomes expensive and the productivity also decreases significantly.

이 발명은 이와같은 문제를 해결하기 위한 것으로서, 이 발명의 목적은 적색형광체에 도전성물질을 최적의 조건으로 부착시키도록 한 저속전자선용 적색형광체 및 그 제조방법을 제공하는 데 있다.SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a red phosphor for a low-speed electron beam and a method of manufacturing the same so that a conductive material is attached to the red phosphor under optimal conditions.

이와같은 목적을 달성하기 위한 이 발명은, 모체가 카드뮴 및 아연 설파이드계이며, 부활제로서 은(Ag)을 사용하는 저속전자용 적색형광체에 있어서, 이 적색형광체 100g에 대하여 인듐옥사이드(In2O3)와 산화제이철(Fe2O3) 및 산화주석(SnO2)으로되는 군으로부터 선택되는 도전성물질 5-25g, 니트로셀룰로이즈 및 에틸셀룰노오즈중 어느 하나인 바인더 0.3-2.5g, 노말부틸아세테이트인 경화제 10-100㎖, 알콜 및 아세톤중 어느 하나인 분산제 30-300㎖들이 혼합첨가되어 형성되는 저속전자선용 적색형광체에 그 특징이 있다.In order to achieve the above object, the present invention provides a red phosphor for low-speed electrons in which a mother is cadmium and zinc sulfide-based and uses silver (Ag) as an activator, and indium oxide (In 2 O) is used with respect to 100 g of the red phosphor. 3 ) and 5-25 g of a conductive material selected from the group consisting of ferric oxide (Fe 2 O 3 ) and tin oxide (SnO 2 ), a binder 0.3-2.5 g, nitrocellulose or ethyl cellulose, a binder 0.3-2.5 g It is characterized by the red phosphor for low-speed electron beams formed by the addition of 10-100 ml of acetate curing agent and 30-300 ml of any one of alcohol and acetone.

또한, 이 발명은 도전성물질과 바인더를 함께 볼밀하고, 경화제와 분산제를 첨가하여 상기 적색형광체와 함께 혼합 반죽하여 건조시키고 체분리하는 저속전자용 적색형광체 제조방법에 그 특징이 있다.In addition, the present invention is characterized by a method of manufacturing a red phosphor for low-speed electrons, which ball mills a conductive material and a binder together, adds a curing agent and a dispersant, kneads together with the red phosphor, dries, and sieves.

이 발명에 따른 저속전자선용 적색형광체의 제조방법의 일실시예에 대하여 첨부된 도면대용사진에 따라서 상세히 설명하면 다음과 같다.One embodiment of a method of manufacturing a red phosphor for a low speed electron beam according to the present invention will be described in detail with reference to the accompanying drawings.

이 발명은 도전성물질을 형광체에 견고하게 부착시키도록 한 것으로서, 먼저 도전성물질로는 인듐옥사이드(In2O3), 산화제이철(Fe2O3), 산화주석(SnO2)중 어느 한가지를 선택하여 사용하고, 부착시키는 물질 즉 바인더(Binder)는 니트로 셀룰로오즈(Nitro Cellouse), 에틸 셀룰로오즈(Ethyl Cellouse)중 어느 하나를 선택하여 사용하며, 경화제로는 소량의 노말 부틸 아세테이트를 사용하고, 분산제로서는 알콜, 아세톤등을 사용한다.In the present invention, the conductive material is firmly attached to the phosphor. First, any one of indium oxide (In 2 O 3 ), ferric oxide (Fe 2 O 3 ), and tin oxide (SnO 2 ) is selected as the conductive material. The material to be attached, that is, the binder, is selected from nitro cellulose and ethyl cellulose, and a small amount of normal butyl acetate is used as a curing agent, and alcohol is used as a dispersant. Use acetone.

간략하게는 바인더인 니트로셀룰로오즈나 에틸셀룰로오즈를 노말부틸 아세테이트로서 경화시키고, 알콜이나 아세톤으로서 경화물질에서 H2O를 탈수시켜 분산을 좋게 하여서 형광체에 도전성물질을 부착시키는 방법으로 이 발명에 따른 형광체가 얻어진다.Briefly, the phosphor according to the present invention is a method of curing nitrocellulose or ethyl cellulose as a normal butyl acetate and dehydrating H 2 O from the cured material as alcohol or acetone to improve dispersion, thereby attaching a conductive material to the phosphor. Obtained.

이 발명의 제1실시예는 (Zn, Cd)S : Ag, Cl로 된 적색형광체 100g을 칭량한 후 바인더인 니트로 셀룰노오즈 1.5g과 도전성물질인 인듐옥사이드(In2O3)18g, 에틸알콜 30㎖를 폴리에틸렌병(이하 PB병이라 칭함)에서 Al2O3볼(Ball)로서 18시간 이상 볼밀(Ball mill)을 행하여 직경이 약 5㎛이하로 되게 한다.The first embodiment of the present invention weighs 100g of a red phosphor of (Zn, Cd) S: Ag, Cl, and then 1.5g of nitro cellulose in a binder and 18g of indium oxide (In 2 O 3 ) as a conductive material, ethyl 30 ml of alcohol is ball milled for at least 18 hours in an polyethylene bottle (hereinafter referred to as PB bottle) as an Al 2 O 3 ball to have a diameter of about 5 μm or less.

이 발명에서는 이러한 공정을 A 공정이라 칭하며, 이후의 공정을 모두 B공정이라 칭한다.In this invention, such a process is called A process and all subsequent processes are called B process.

이 도전성물질과 바인더의 혼합물질의 볼밀이 끝나면 노말부틸 아세테이트와 아세톤의 혼합용액 10g을 칭량한 후 적색형광체에 넣고 혼합 반죽한다.When the ball mill of the mixture of the conductive material and the binder is finished, 10 g of a mixed solution of normal butyl acetate and acetone is weighed, and then mixed into a red phosphor and kneaded.

이와같이 슬러리화된 혼합 형광체에 노말 부틸 아세테이트 80㎖를 1분동안 서서히 부으면서 휘저어 섞은 후, 약 20분간 방치하여 침전물을 남기고 상등액을 디캔테이션(Decantation)방법으로 제거한 후, 여기에 아세톤 150㎖를 1분간에 걸쳐서 서서히 부은후 5분간 휘저어 섞는다. 이후 약 20분간 방치시켜 침전물이 생기게 한 후에 상기한 디캔테이션 방법으로 상등액을 버리고 건조로에서 60-80℃로 60분간 건조시킨다. 이후 400메쉬의 체로 체분리를 실시하는 것으로 B공정이 완료되어 도전성물질의 부착량이 7%인 이 발명에 따른 저속전자선용 적색 형광체가 얻어진다.After stirring 80 ml of normal butyl acetate slowly for 1 minute in a slurry mixture mixed in this way, the mixture was left to stand for about 20 minutes, leaving a precipitate, and the supernatant was removed by decantation. Then, 150 ml of acetone was added thereto for 1 minute. Slowly pour over and stir for 5 minutes. After leaving for about 20 minutes to form a precipitate, the supernatant was discarded by the above-described decantation method and dried at 60-80 ° C. for 60 minutes in a drying furnace. Subsequently, sieve separation with a 400 mesh sieve completes step B, thereby obtaining a red phosphor for a low-speed electron beam according to the present invention having an adhesion amount of a conductive material of 7%.

한편, 이 발명의 제2 실시예는 상기 (Zn, Cd)S : Ag, Cl로 된 적색형광체 100g에, 에틸셀룰로오즈 1.5g과 인듐옥사이드 18g과 에틸알콜 30㎖를 PE병에서 Al2O3볼로서 18시간 이상 볼밀을 실시한 후 제1실시예에서의 B 공정을 행하여 도전성물질의 부착량이 7%인 적색형광체를 얻는다.On the other hand, in the second embodiment of the present invention, 100 g of red phosphor of (Zn, Cd) S: Ag, Cl, 1.5 g of ethyl cellulose, 18 g of indium oxide, and 30 ml of ethyl alcohol were added to an Al 2 O 3 ball in a PE bottle. After ball milling for 18 hours or more, step B in Example 1 is carried out to obtain a red phosphor having a deposition amount of 7% of the conductive material.

이 발명의 제3 실시예는 상기 (Zn, Cd)S : Ag, Cl로 된 적색형광체 100g에, 니트로셀룰로오즈 1.5g과 인듐옥사이드 18g, 사염화탄소(CCl4) 30㎖를 PE병에서 Al2O3볼로서 20시간 이상 볼밀을 실시한다. 이후에는 제1실시예에서의 B 공정을 실시하여서 도전성물질의 부착량이 7%인 적색형광체를 얻는다.In a third embodiment of the present invention, 100 g of red phosphor of (Zn, Cd) S: Ag, Cl, 1.5 g of nitrocellulose, 18 g of indium oxide, and 30 ml of carbon tetrachloride (CCl 4 ) in an Al 2 O 3 PE bottle A ball mill is performed for 20 hours or more as a ball. Thereafter, step B of the first embodiment is carried out to obtain a red phosphor having a deposition amount of 7% of the conductive material.

제2도(도면대용사진)는 이 발명에 따른 제조방법으로 제조된 적색형광체를 EPMA장치로 3200배 확대한 사진으로서, 큰 입자가 적색형광체 입자이고 작은 입자가 인듐옥사이드의 입자이며, 사진에서와 같이 인듐옥사이드의 입자들이 뭉쳐 있지 않고 고르게 분포되어 적색형광체 입자에 강하게 부착되어 있다.FIG. 2 is a photograph of a red phosphor manufactured by the manufacturing method according to the present invention 3200 times magnified with an EPMA device, in which large particles are red phosphor particles and small particles are indium oxide particles. Likewise, the particles of indium oxide are distributed evenly and are strongly attached to the red phosphor particles.

표 1은 상기한 각 실시예의 결과와 종래의 혼합방식에 대한 결과를 나타낸 것이다.Table 1 shows the results of the above-described examples and the conventional mixing method.

Figure kpo00002
Figure kpo00002

여기에서, 종래 방법에 따른 형광체의 발광휘도를 100%라 가정하고, 적색형광체에 부착된 도전성물질인 인듐옥사이드이 양이 최적의 조건인 7%로 모두 동일한 것으로 가정할 때, 이 발명에 따른 제조방법으로 형성된 적색형광체는 종래의 방법에 의한 것보다 발광휘도가 8-10%이상 높음을 알 수 있다.Here, assuming that the luminous luminance of the phosphor according to the conventional method is 100%, assuming that the amount of indium oxide, which is a conductive material attached to the red phosphor, is all equal to 7%, the optimum condition, the manufacturing method according to the present invention It can be seen that the red phosphor formed by the light emitting luminance is 8-10% or more higher than that by the conventional method.

한편, 상기 표 1과 같은 대비표에 있어서는 도전성물질인 인듐옥사이드의 부착량이 동일한 최적량(7%)이라 가정한 것이므로 실제 제품에 있어서는 그 발광휘도의 차는 더욱 크게 된다. 즉, 종래의 방법에 따르면, 제1도(도면대응사진)에서와 같이 도전성물질이 적색형광체에 고르게 부착되지 않고 서로의 비중차에 의해 적색형광체와 도전성물질이 각각으로 뭉쳐지게 되므로, 단위 형광체 입자에서 휘도가 낮은 것과 휘도가 높은것의 차이가 발생하게 되며, 또한 상기 도전성물질은 발광을 하지 않으므로 단위 형광체 입자를 100이라 할 때 7이상이 부착되면 이 또한 발광휘도가 떨어지게 되어, 이 발명과의 발광휘도 비교치는 상기한 것보다 더욱 큰 차이가 생기는 것이다.On the other hand, in the comparison table as shown in Table 1, since the deposition amount of the indium oxide, which is a conductive material, is assumed to be the same optimum amount (7%), the difference in the luminance of the emitted light becomes larger in an actual product. That is, according to the conventional method, since the conductive materials are not evenly adhered to the red phosphors as shown in FIG. Since the difference between the low luminance and the high luminance occurs, and the conductive material does not emit light, when the unit phosphor particles are attached to 100 or more, the luminance is also lowered. The luminance luminance comparison value is that a larger difference occurs than the above.

이상에서와 같이 이 발명에 따른 저속전자선용 적색형광체와 그 제조방법에 의하면, 상기 적색형광체 100g에 대하여 인듐옥사이드(InO)와 산화제이철(FeO) 및 산화주석(SnO)으로 되는 군으로부터 선택되는 도전성물질 5-25g, 니트로셀룰로오즈 및 에틸셀룰로오즈중 어느 하나인 바인더 0.3-2.5g, 노말부틸 아세테이트인 경화제 10-100㎖, 알콜 및 아세톤 중 어느하나인 분산제 30-300㎖들이 혼합 첨가되어 형성되는 것이므로, 적색 형광체의 입자에 도전성물질의 입자가 매우 견고하고 강하게 부착되어 형광표시관등의 애노드상에 도포시켜도, 상기 입자가 이탈되지 않고 또한 부착되는 양도 최적량으로 되어 적색형광체의 최대로 되게 한다.As described above, according to the red phosphor for a low-speed electron beam according to the present invention and a method of manufacturing the same, a conductive material selected from the group consisting of indium oxide (InO), ferric oxide (FeO), and tin oxide (SnO) with respect to 100 g of the red phosphor is disclosed. Since 5-25 g of material, 0.3-2.5 g of a binder of nitrocellulose and ethyl cellulose, 10-100 ml of a hardener of normal butyl acetate, or 30-300 ml of a dispersant of alcohol and acetone are formed by a mixed addition, Even when the particles of the conductive material are very firmly and strongly adhered to the particles of the red phosphor and are applied onto the anode such as a fluorescent display tube, the amount of the particles is not detached and attached is also an optimum amount to maximize the red phosphor.

따라서, 이 발명에 따른 저속전자선용 적색형광체는 상기 도전성물질에 의해 저전압(20V)에서도 그 전류의 흐름이 원활하게 되어 형광체의 입자에서 표면대전이 발생되지 않고, 입자 표면 전체에서 발광히 행해져서 그 발광휘도가 최대로 향상되는 것이다.Therefore, the red phosphor for the low-speed electron beam according to the present invention has a smooth current flow even at low voltage (20V) by the conductive material, so that surface charging does not occur in the particles of the phosphor, and the light is emitted from the entire surface of the particles. The luminance of light emitted is maximized.

따라서, 이 발명에 따른 저속전자선용 적색형광체를 형광표시관등의 표시기에 적용시키면 제품의 불량률을 매우 큰 폭으로 감소시키는 효과를 가져오게 되어 생산성향상과 원가절감을 기할수 있는 것이다.Therefore, applying the red phosphor for the low-speed electron beam according to the present invention to an indicator such as a fluorescent display tube has an effect of greatly reducing the defective rate of the product, thereby improving productivity and reducing costs.

Claims (2)

(Zn, Cd)S : Ag, Cl 형광체 : 도전성 물질로서 인듐옥사이드(In2O3)와 산화주석(SnO2): 바인더로서 니트로셀룰로오즈 또는 에틸셀룰로오즈: 경화제로서 노말부틸 아세테이트 및 분산제로서 알콜 또는 아세톤을 포함하는 저속전자선용 적색형광체로서, (Zn, Cd)S : Ag, Cl 형광체 100g당 상기 인듐옥사이드 또는 산화 주석이 5-25g, 상기 니트로셀룰로오즈 또는 에틸셀룰노오즈가 0.3-2.5g, 사이 노말부틸아세테이트가 10-100㎖, 상기 알콜 및 아세톤이 30-300㎖ 비율인 저속전자선용 적색형광체.(Zn, Cd) S: Ag, Cl Phosphor: Indium oxide (In 2 O 3 ) and tin oxide (SnO 2 ) as conductive material: Nitrocellulose or ethyl cellulose as binder: Normal butyl acetate as hardener and alcohol or acetone as dispersant A red phosphor for a low-speed electron beam, comprising: 5-25 g of the indium oxide or tin oxide, 0.3-2.5 g of the nitrocellulose or ethyl cellulose, per 100 g of (Zn, Cd) S: Ag, Cl phosphor; A red phosphor for a low speed electron beam, wherein the butyl acetate is 10-100 ml, and the alcohol and acetone are 30-300 ml. (Zn, Cd)S : Ag, Cl 형광체 : 도전성 물질로서 인듐옥사이드(In2O3) 또는 산화주석(SnO2), 및 바인더인 니트로셀룰로오즈 또는 에틸셀룰로오즈를 함께 볼밀하는 공정과: 상기 볼밀된 물질에 경화제인 노말부틸 아세테이트 및 분산제인 알콜 또는 아세톤을 혼합하여 반죽하는 공정: 및 상기 반죽을 건조시킨 후 체분리하는 공정을 포함하는 저속전자선용 적색 형광체 제조 방법.(Zn, Cd) S: Ag, Cl Phosphor: Ball milling together indium oxide (In 2 O 3 ) or tin oxide (SnO 2 ) as a conductive material, and nitrocellulose or ethylcellulose as a binder: the ball milled material A process for kneading a mixture of normal butyl acetate as a curing agent and alcohol or acetone as a dispersing agent, and drying the sieve and then separating the sieves.
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