JPH03220286A - Red emitting phosphor and cathode ray tube made by using it - Google Patents
Red emitting phosphor and cathode ray tube made by using itInfo
- Publication number
- JPH03220286A JPH03220286A JP1739890A JP1739890A JPH03220286A JP H03220286 A JPH03220286 A JP H03220286A JP 1739890 A JP1739890 A JP 1739890A JP 1739890 A JP1739890 A JP 1739890A JP H03220286 A JPH03220286 A JP H03220286A
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- particle size
- cathode ray
- ray tube
- slurry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 239000002245 particle Substances 0.000 claims abstract description 81
- 239000002002 slurry Substances 0.000 claims abstract description 27
- 238000002156 mixing Methods 0.000 abstract description 7
- 239000000049 pigment Substances 0.000 abstract description 6
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 abstract description 6
- 230000001186 cumulative effect Effects 0.000 abstract description 3
- GFKJCVBFQRKZCJ-UHFFFAOYSA-N oxygen(2-);yttrium(3+);trisulfide Chemical compound [O-2].[O-2].[O-2].[S-2].[S-2].[S-2].[Y+3].[Y+3].[Y+3].[Y+3] GFKJCVBFQRKZCJ-UHFFFAOYSA-N 0.000 abstract description 2
- SAHDTDBCCYEWTD-UHFFFAOYSA-M P.[S-2].[SH-].S.[Y+3] Chemical class P.[S-2].[SH-].S.[Y+3] SAHDTDBCCYEWTD-UHFFFAOYSA-M 0.000 abstract 2
- 239000011159 matrix material Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 21
- 238000003756 stirring Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 239000006228 supernatant Substances 0.000 description 9
- 239000007788 liquid Substances 0.000 description 8
- 239000000725 suspension Substances 0.000 description 8
- 239000006185 dispersion Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 5
- 235000011114 ammonium hydroxide Nutrition 0.000 description 5
- -1 europium-activated yttrium oxysulfide phosphor Chemical class 0.000 description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 description 5
- 229910052693 Europium Inorganic materials 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- JOSWYUNQBRPBDN-UHFFFAOYSA-P ammonium dichromate Chemical compound [NH4+].[NH4+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O JOSWYUNQBRPBDN-UHFFFAOYSA-P 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000839 emulsion Substances 0.000 description 4
- 238000010304 firing Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 238000000498 ball milling Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 150000002894 organic compounds Chemical class 0.000 description 3
- 238000007873 sieving Methods 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 description 3
- 229940007718 zinc hydroxide Drugs 0.000 description 3
- 229910021511 zinc hydroxide Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000004110 Zinc silicate Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000010908 decantation Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 150000002484 inorganic compounds Chemical class 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- XSMMCTCMFDWXIX-UHFFFAOYSA-N zinc silicate Chemical compound [Zn+2].[O-][Si]([O-])=O XSMMCTCMFDWXIX-UHFFFAOYSA-N 0.000 description 2
- 235000019352 zinc silicate Nutrition 0.000 description 2
- 229910000368 zinc sulfate Inorganic materials 0.000 description 2
- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 1
- WZFUQSJFWNHZHM-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC(=O)N1CC2=C(CC1)NN=N2 WZFUQSJFWNHZHM-UHFFFAOYSA-N 0.000 description 1
- 108010043121 Green Fluorescent Proteins Proteins 0.000 description 1
- 229920000084 Gum arabic Polymers 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 241000978776 Senegalia senegal Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- RSEIMSPAXMNYFJ-UHFFFAOYSA-N europium(III) oxide Inorganic materials O=[Eu]O[Eu]=O RSEIMSPAXMNYFJ-UHFFFAOYSA-N 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910001386 lithium phosphate Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 239000001054 red pigment Substances 0.000 description 1
- FKTOIHSPIPYAPE-UHFFFAOYSA-N samarium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Sm+3].[Sm+3] FKTOIHSPIPYAPE-UHFFFAOYSA-N 0.000 description 1
- 239000011163 secondary particle Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- TWQULNDIKKJZPH-UHFFFAOYSA-K trilithium;phosphate Chemical compound [Li+].[Li+].[Li+].[O-]P([O-])([O-])=O TWQULNDIKKJZPH-UHFFFAOYSA-K 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 239000011686 zinc sulphate Substances 0.000 description 1
- 235000009529 zinc sulphate Nutrition 0.000 description 1
Landscapes
- Luminescent Compositions (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、カラーブラウン管の蛍光膜の形成に好適な赤
色発光蛍光体と、これを用いた陰極線管に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a red-emitting phosphor suitable for forming a phosphor film of a color cathode ray tube, and a cathode ray tube using the same.
（従来の技術）
コンピュータ端末表示装置、ＯＡ機器などの普及に伴い
゛、数多くのカラーデイスプレィ管か使用されており、
蛍光膜ストライプまたはドツトの高精細化が進んでいる
。(Prior Art) With the spread of computer terminal display devices, office automation equipment, etc., many color display tubes are being used.
The definition of fluorescent film stripes or dots is progressing.
カラーブラウン管の蛍光膜の形成方法は、通常一般にポ
リビニルアルコール（ＰＶＡ） 、重クロム酸アンモニ
ウム（ＡＤＣ）と界面活性剤を含む水溶液に蛍光体を分
散させた蛍光体スラリーを調製し、これをガラスパネル
に塗布し、蛍光膜を形成する。The method for forming a fluorescent film for color cathode ray tubes is to prepare a phosphor slurry in which phosphors are dispersed in an aqueous solution containing polyvinyl alcohol (PVA), ammonium dichromate (ADC), and a surfactant, and then apply this slurry to a glass panel. to form a fluorescent film.
しかる後シャドウマスクを通して、紫外線を照射し、照
射部分のＰＶＡを硬化させ、次に現像により硬化させた
部分以外の蛍光膜を除去し、蛍光体のストライプまたは
ドツトを形成する。Thereafter, ultraviolet rays are irradiated through a shadow mask to harden the PVA in the irradiated areas, and then the fluorescent film other than the hardened areas is removed by development to form phosphor stripes or dots.
この塗布方法において、蛍光膜ストライプまたはドツト
の高精細化に対応する蛍光体を得るためには、
（１）緻密なストライプまたはドツトの蛍光膜が形成さ
れること。In this coating method, in order to obtain a phosphor that is compatible with high-definition phosphor film stripes or dots, (1) a phosphor film with dense stripes or dots is formed;
（２）ストライプまたはドツト蛍光膜の切れが良いこと
（ストライプまたはドツトのエツジが蛇行しないように
する）。(2) The striped or dotted fluorescent film should have good sharpness (the edges of the striped or dot should not meander).
（３）Ｐｔ色を生しないこと。(3) Do not produce Pt color.
（４）付着力が良いこと。(4) Good adhesion.
などの条件を満たすことが必要である。It is necessary to satisfy the following conditions.
現状で要求されるこれらの特性を満足させるため、蛍光
体の表面処理に関して種々の改良、開発か行なわれてい
る。In order to satisfy these characteristics currently required, various improvements and developments have been made regarding the surface treatment of phosphors.
たとえば特開昭５４−１０２２９９号公報、特公昭５９
−８３１０号公報には、顔料付着蛍光体を水溶性有機化
合物溶液と接触させ分散性を向上させる処理方法か開示
されている。For example, Japanese Patent Application Publication No. 54-102299,
Japanese Patent No. 8310 discloses a treatment method in which a pigment-attached phosphor is brought into contact with a water-soluble organic compound solution to improve its dispersibility.
また、特公昭６０−２１６７５号公報、特公昭６１−４
６５１２号公報には、蛍光体の表面処理によって付着力
向上および混色防止の方法が記載されている。Also, Special Publication No. 60-21675, Special Publication No. 61-4
Publication No. 6512 describes a method for improving adhesion and preventing color mixture by surface treatment of phosphors.
このほか、特公昭６２−９２７６号公報には、顔料付は
方法の改良によりスラリー溶液中ての分散性を向上させ
る方法か記載されている。In addition, Japanese Patent Publication No. 62-9276 describes a method for improving the dispersibility in a slurry solution by improving the pigment application method.
（発明が解決しようとする課題）
上述したように、無機化合物または有機化合物を用いて
蛍光体を処理することによって、蛍光体の分散性かある
程度は改善される。(Problems to be Solved by the Invention) As described above, by treating the phosphor with an inorganic compound or an organic compound, the dispersibility of the phosphor can be improved to some extent.
しかしながら、市場の高い要求レベルからすれば、また
不十分である。特に赤色蛍光膜は、−船釣に３色目に膜
形成される（通常は、緑色、青色、赤色の順に塗布され
る）ため、緑色、青色蛍光膜が先に形成された凸凹の大
きいパネル面上に塗布しなければならず、ストライプま
たはドツト蛍光膜の切れか悪いと、混色を生じさせると
いう問題がある。However, it is still insufficient in view of the high demand level of the market. In particular, the red fluorescent film is applied as the third color in boat fishing (usually applied in the order of green, blue, and red), so the panel surface has large irregularities on which the green and blue fluorescent films were formed first. If the stripe or dot fluorescent film is poorly cut, color mixing may occur.
これによって陰極線管の品質を低下し、充分な信頼性か
得られなくなるのである。This deteriorates the quality of the cathode ray tube and makes it impossible to obtain sufficient reliability.
混色のない高品質の蛍光膜を形成するためには、蛍光体
のスラリー溶液中での分散性か良いことか必要である。In order to form a high-quality phosphor film without color mixture, it is necessary that the phosphor has good dispersibility in the slurry solution.
本発明は、このような課題を解決するためになされたも
ので、ストライプやドツトの１；７Ｊれが良く、緻密で
混色を生じさせない赤色発光蛍光体と、この赤色発光蛍
光体を用いることにより信頼性を向上させた陰極線管を
提供することを目的とする。The present invention was made in order to solve such problems, and by using a red light emitting phosphor with good 1:7J pattern of stripes or dots, which is dense and does not cause color mixture, and this red light emitting phosphor. The purpose is to provide a cathode ray tube with improved reliability.
［発明の構成］
（課題を解決するための手段）
本発明の赤色発光蛍光体は、蛍光体の平均粒度か４〜５
μｍであり、酸硫化イツトリウムを母体とする赤色発光
蛍光体において、平均粒度とスラリー粒度分布５０％Ｄ
の比（粒度分布５０％Ｄ／平均拉度）か１．３以下で、
かつ粒度分布の８．０１μｍ以上の粒度別体積（重量）
分布が１０％以下であることを特徴としている。[Structure of the Invention] (Means for Solving the Problems) The red-emitting phosphor of the present invention has an average particle size of 4 to 5
μm, and the average particle size and slurry particle size distribution are 50%D in a red-emitting phosphor based on yttrium oxysulfide.
The ratio (particle size distribution 50% D/average ablation degree) is 1.3 or less,
And volume (weight) by particle size of 8.01 μm or more in particle size distribution
It is characterized by a distribution of 10% or less.
また、本発明の陰極線管は、上記赤色発光蛍光体を用い
た蛍光膜を、外囲器を構成するパネル内面に備えたこと
を特徴としている。Further, the cathode ray tube of the present invention is characterized in that a phosphor film using the above-mentioned red light emitting phosphor is provided on the inner surface of the panel constituting the envelope.
本発明において使用する蛍光体としては、ユーロピウム
付活酸硫化イツトリウム蛍光体、顔料被覆ユーロピウム
付活酸硫化イツトリウム蛍光体などが挙げられる。Examples of the phosphor used in the present invention include a europium-activated yttrium oxysulfide phosphor and a pigment-coated europium-activated yttrium oxysulfide phosphor.
本発明において、平均粒度はブレーン法によりＩｌ′Ｐ
ｊ定した値であり、セル容器に蛍光体の一定量を充填し
て測定した後、比重５，１として計算した値である。In the present invention, the average particle size is determined by the Blaine method.
This is a value determined by filling a cell container with a certain amount of phosphor and then calculating the specific gravity as 5.1.
また、本発明におけるスラリー粒度分布５０％Ｄ値は、
ポリビニルアルコール、重クロム酸アンモニウムなどと
界面活性剤とを含む水溶液に蛍光体を懸濁したスラリー
を、６〜１２時間攪拌した後このスラリーの一部を抜き
取り、コールタ−カウンタ社のＴＡＵ粒度分布測定器に
て測定したデータから求めた累積分布の５０９６の値を
もって示したものである。In addition, the slurry particle size distribution 50% D value in the present invention is
A slurry in which a phosphor is suspended in an aqueous solution containing polyvinyl alcohol, ammonium dichromate, etc., and a surfactant is stirred for 6 to 12 hours, and then a portion of this slurry is extracted and subjected to Coulter Counter's TAU particle size distribution measurement. 5096 values of the cumulative distribution obtained from data measured with the instrument.
本発明において、平均粒度とスラリー粒度分布５０％Ｄ
の比（粒度分布５０％Ｄ／平均粒度）は１．３以下であ
る。In the present invention, the average particle size and slurry particle size distribution 50%D
The ratio (particle size distribution 50% D/average particle size) is 1.3 or less.
この（粒度分布５０％Ｄ／平均粒度）の比が１，３を超
えると、蛍光体粒子の分散性が低下し、緻密な膜を形成
することかできなくなる。When this ratio (particle size distribution 50% D/average particle size) exceeds 1.3, the dispersibility of the phosphor particles decreases, making it impossible to form a dense film.
なお、この比か１ならば完全分散、すなわち蛍光体粒子
の一つ一つか完全にほぐれており、二次粒子を形成して
いない状態である。Note that if this ratio is 1, it means complete dispersion, that is, each phosphor particle is completely loosened and no secondary particles are formed.
さらに、本発明においては、スラリ−溶液中ての粒度８
．０１μｍ以上の蛍光体粒子が占める割合、すなわち粒
度別体積（重量）分布は１０％以下である。Furthermore, in the present invention, the particle size in the slurry solution is 8.
．． The proportion occupied by phosphor particles of 0.01 μm or more, that is, the volume (weight) distribution by particle size, is 10% or less.
これは、従来の分布に比べ、シャープな分布である。一
般に、分布かシャープであると蛍光膜付着力か低下する
と考えられていたが、本発明のように平均粒度４〜５μ
ｍの蛍光体を使用すれば、８．０１８Ｍより小さい粒度
（１〜８μｍ）の蛍光体粒子か９０％以上分布していれ
ば、付着力の低下を防ぐことができる。This is a sharper distribution than the conventional distribution. Generally, it was thought that if the distribution was sharp, the adhesion force of the fluorescent film would be reduced, but as in the present invention, the average particle size is 4 to 5 μm.
If a phosphor of m is used, and 90% or more of the phosphor particles are distributed with a particle size smaller than 8.018M (1 to 8 μm), a decrease in adhesion can be prevented.
粒度８．０１μｍの粒子が多いと蛍光膜の緻密度が低下
し、粗大粒子゛を多く含む蛍光膜は、ストライプまたは
ドツト膜のエツジの剥離幅か増大する。If there are many particles with a particle size of 8.01 .mu.m, the density of the fluorescent film will decrease, and if the fluorescent film contains many coarse particles, the peeling width at the edge of the stripe or dot film will increase.
すると、いイっゆる切れの悪い（エツジか蛇行する）蛍
光膜となり、混色を生じさせるのである。This results in a phosphor film with poor edges (meandering edges), resulting in color mixture.
より好ましい状態は、粒度８，０１μｍの粒子をスラリ
ー全体の中で６％以下とすることである。A more preferable condition is that particles with a particle size of 8.01 μm account for 6% or less of the entire slurry.
そして、最終的な蛍光体の平均粒度は、４〜５μｍであ
る。The average particle size of the final phosphor is 4 to 5 μm.
本発明の赤色発光蛍光体は、たとえば次のような方法で
得ることができる。The red-emitting phosphor of the present invention can be obtained, for example, by the following method.
Ｙ２Ｏ３、Ｅｕ２Ｏ３、イオウ、融剤を混合し、この混
合物を密閉型のるつぼに充填し、温度１１００〜１１８
０℃の電気炉にて焼成する。Mix Y2O3, Eu2O3, sulfur, and flux, fill this mixture into a closed crucible, and heat the mixture to a temperature of 1100 to 118.
Fire in an electric furnace at 0°C.
次いで得られた焼成物に水洗、酸による洗浄を行い、蛍
光体コアを得る。Next, the obtained fired product is washed with water and acid to obtain a phosphor core.
この蛍光体コアをボールミルなどにより分散させたもの
を分級により大粒子を除去する。This phosphor core is dispersed using a ball mill or the like, and large particles are removed by classification.
ここで分級とは、一定量の蛍光体懸濁液を攪拌後、一定
時間静置し、上澄液をサイホンにより別の容器に移す。Classification here means that a certain amount of the phosphor suspension is stirred, left to stand for a certain period of time, and the supernatant liquid is transferred to another container using a siphon.
そして残った懸濁液にさらに一定量の純水を加え、上記
と同様の操作を数回繰り返す。最後に残った蛍光体は、
分級残として回収する。上澄液に含まれる蛍光体を静置
して集め、次の処理に進む。Then, a certain amount of pure water is added to the remaining suspension, and the same operation as above is repeated several times. The last remaining phosphor is
Collect as classification residue. The phosphor contained in the supernatant is collected by standing still, and the process proceeds to the next step.
このような分級工程における静置時間によって粒度分布
特性か左右される。Particle size distribution characteristics are influenced by the standing time in such a classification step.
この後、コア蛍光体を純水に＠濁させ、あらかじめ良く
分散させたベンガラ顔料分散液の所定量を加えて攪拌す
る。Thereafter, the core phosphor is suspended in pure water, and a predetermined amount of a red pigment dispersion that has been well dispersed in advance is added and stirred.
さらにアクリルエマルジョン樹脂の所定量を加えて攪拌
し、ｐＨを酸側に調整してアクリルエマルジョンを凝固
させ、顔料を蛍光体表面に付着させる。Further, a predetermined amount of acrylic emulsion resin is added and stirred, the pH is adjusted to the acid side, the acrylic emulsion is coagulated, and the pigment is attached to the surface of the phosphor.
この蛍光体を純水で水洗し、ボールミルなどにより再度
分散させる。そして、必要に応じて無機化合物（たとえ
ば珪酸亜鉛、二酸化珪素、水酸化アルミニウム、水酸化
亜鉛、珪酸アルミニウムなど）または有機化合物（アラ
ビアゴム、ＨＰＣなど）の表面処理を施して、ろ過、乾
燥、ふるい分けを経て目的とする蛍光体を得る。This phosphor is washed with pure water and dispersed again using a ball mill or the like. Then, if necessary, the surface is treated with an inorganic compound (e.g. zinc silicate, silicon dioxide, aluminum hydroxide, zinc hydroxide, aluminum silicate, etc.) or an organic compound (gum arabic, HPC, etc.), followed by filtration, drying, and sieving. The desired phosphor is obtained through this process.
このほか、分級を行わずにボールミルを長時間施す方法
でも得ることができる。In addition, it can also be obtained by applying ball milling for a long time without classification.
（作 用）
蛍光膜の高精細化か進むにつれ、蛍光体粒子も大粒子（
６〜７μｍ）より小粒子（４〜５μｍ）が要求されつつ
ある。小粒子の方か緻密な蛍光膜面を得ることができ、
高精細なカラー陰極線管に適しているためである。(Function) As the resolution of phosphor films progresses, the phosphor particles also become larger particles (
There is an increasing demand for smaller particles (4-5 μm) than those (6-7 μm). It is possible to obtain a dense fluorescent film surface with small particles,
This is because it is suitable for high-definition color cathode ray tubes.
本発明蛍光体により、ストライプ又はドツト切れか良く
、混色のない蛍光膜を得ることかできる。よって高品質
の蛍光膜を有するカラー陰極線管を得ることかできる。By using the phosphor of the present invention, it is possible to obtain a phosphor film with good stripes or dots and no color mixture. Therefore, a color cathode ray tube having a high quality fluorescent film can be obtained.
（実施例） 以下、本発明の実施例について説明する。(Example) Examples of the present invention will be described below.
実施例Ｉ
Ｔｂ １０ｐｐｎ＋を含むＹ２Ｏ３をＩｋｇ 、 Ｅｕ
２ＯＦを０、ＯＥｉｋｇ ５Ｎａ２ ＣＯａを０．４ｋ
ｇ、 Ｓを０．４ｋｇ、モしてに３ ｐｏ４を０．０８
ｋｇ用いて混合した後、密閉型るつほに入れ、温度１１
４０℃の電気炉に入れて５時間焼成する。Example I Ikg of Y2O3 containing 10ppn+ of Tb, Eu
2OF is 0, OEikg 5Na2 COa is 0.4k
g, S 0.4kg, moshi ni 3 po4 0.08
After mixing using 1.0 kg, put it in a sealed rutsuho and heat it to 11
Place in an electric furnace at 40°C and bake for 5 hours.
焼成後、焼成物を純水にて３回水洗したのち、希塩酸溶
液中で洗浄し、次に純水で、ｐｏが６〜７こなるまで水
洗し、Ｙ２０２ Ｓ／Ｅｕコア蛍光体を得る。After firing, the fired product is washed three times with pure water, then washed in a dilute hydrochloric acid solution, and then washed with pure water until po reaches 6 to 7 to obtain a Y202 S/Eu core phosphor.
このコア蛍光体をボールミルにて３０分間分散し、ポッ
トより取り出した蛍光体懸濁液に純水を加え全体量を１
５℃とし、この懸濁液を１０分間撹拌したのち、撹拌機
を止め、１０分間静置する。This core phosphor was dispersed in a ball mill for 30 minutes, and pure water was added to the phosphor suspension taken out from the pot to make a total volume of 1.
After stirring the suspension at 5° C. for 10 minutes, the stirrer was stopped and the suspension was allowed to stand for 10 minutes.
静置後サイホンにて上澄液を別容器に抜き取る。After standing, drain the supernatant liquid into a separate container using a siphon.
上澄液は全体量の２７３まで抜き取る。The supernatant liquid is removed to a total volume of 273.
残り１／３にさらに純水を加え再び１５Ｊ２として上記
と同様の操作を繰り返す。Add pure water to the remaining 1/3 and repeat the same operation as above to make 15J2 again.
この一連の操作を５回実施したのち、上澄液に含まれる
蛍光体を集める。After performing this series of operations five times, the phosphor contained in the supernatant is collected.
この様に分級工程により得られた蛍光体１ｋｇをボール
ミルポットに入れ、再び３０分間ボールミルによる分散
を行う。ボールミル後ポットより取りたし、純水を加え
、全体量を１０℃とする。この懸濁液に２５％水ガラス
２ｍｌ １０％５ｉ０２分散液５１０．４モル／ １
２ Ｚｎ５Ｏａ溶液２０ｍ１の順に加えたのち３０分間
撹拌する。1 kg of the phosphor thus obtained through the classification step is placed in a ball mill pot and dispersed again using a ball mill for 30 minutes. After ball milling, remove from the pot and add pure water to bring the total volume to 10°C. Add to this suspension 2 ml of 25% water glass 10% 5i02 dispersion 510.4 mol/1
2 Add 20 ml of Zn5Oa solution in this order and stir for 30 minutes.
撹拌後静置して上澄液を除去し、純水にて３回水洗する
。水洗後濾過、乾燥し、篩別することにより二酸化珪素
と珪酸亜鉛で表面処理した平均粒度４．６μｍの本発明
による赤色発光蛍光体が得られる。After stirring, the mixture is allowed to stand, the supernatant liquid is removed, and the mixture is washed three times with pure water. After washing with water, it is filtered, dried, and sieved to obtain a red-emitting phosphor according to the present invention having an average particle size of 4.6 μm and surface-treated with silicon dioxide and zinc silicate.
さらに、この実施例で得た赤色発光蛍光体を用いて、純
水、ＰＶＡ 、 ＡＤＣと界面活性剤とからなる蛍光体
スラリーを作成し、この赤色発光蛍光体による蛍光膜を
向えた陰極線管を作製した。Furthermore, using the red-emitting phosphor obtained in this example, a phosphor slurry consisting of pure water, PVA, ADC, and a surfactant was prepared, and a cathode ray tube with a phosphor film made of this red-emitting phosphor was prepared. Created.
なお、この実施例では、スラリー粒度分布の５０％Ｄ／
平均粒度の比は１．１５て、８．０１１１ｍ以上の粒度
別体積（重量）分布は６％であった。In addition, in this example, 50%D/
The average particle size ratio was 1.15, and the volume (weight) distribution by particle size of 8.0111 m or more was 6%.
第１図はこの陰極線管を示す図で、パネル１にファンネ
ル２およびネック３が封着されて外囲器４を構成し、ネ
ック３から電子銃５か挿入されている。そして、パネル
１の内面に蛍光膜６が形成され、電子銃５によって放出
された電子ビームか蛍光膜６に衝突して励起発光するよ
うになっている。FIG. 1 shows this cathode ray tube. A funnel 2 and a neck 3 are sealed to a panel 1 to form an envelope 4, and an electron gun 5 is inserted through the neck 3. A fluorescent film 6 is formed on the inner surface of the panel 1, and the electron beam emitted by the electron gun 5 collides with the fluorescent film 6 to excite it to emit light.
このような陰極線管は、蛍光膜の緻密度が高く、ストラ
イプ又はドツト切れか向上しており、混色の無い高品位
のものであった。Such a cathode ray tube had a high density phosphor film, improved stripe or dot breakage, and was of high quality without color mixture.
この陰極線管について、蛍光膜の切れ、および混色の特
性試験を行った。This cathode ray tube was tested for phosphor film breakage and color mixture characteristics.
切れは、通常のストライプ状の蛍光膜（厚さ１２０μｍ
）を形成したときのエツジの蛇行量の最大と最小を数字
で示した。The cut is a normal striped fluorescent film (thickness 120μm
) The maximum and minimum meandering amounts of the edges are shown numerically.
また、混色は、パネルの中心及びコーナーの一定の視野
の青色と緑色蛍光膜に付着している赤色蛍光体のｆ固数
で示した。Further, the color mixture was expressed by the f constant number of the red phosphor attached to the blue and green phosphors in a certain field of view at the center and corners of the panel.
これらの結果を第１表に示す。さらに比較例１として、
平均粒度が実施例と同等で、ただしスラリー粒度分布の
５０％Ｄ／平均粒度の比が１３を超え、８．０１μＭ以
上の粒度別体積（重量）分布が１０％を超えた蛍光体に
おける特性試験を行い、実施例の結果と併せて第１表に
示した。These results are shown in Table 1. Furthermore, as Comparative Example 1,
Characteristic test on a phosphor whose average particle size is the same as in the example, but the ratio of 50%D/average particle size of the slurry particle size distribution exceeds 13, and the volume (weight) distribution by particle size of 8.01 μM or more exceeds 10% The results are shown in Table 1 together with the results of Examples.
実施例？
Ｔｂを２０ｐｐｍ含むＹ２Ｏ３を１ｋｇ 、 Ｅｕ２０
３を０．０６ｋｇ ＸＮａ２ ＣＯ３を０．４ｋｇ、
Ｓを０．４ｋｇ、そしてに３ＰＯ４をＯ，Ｃｌ６ｋｇ用
い、これらを良く混合した後、密閉ｐるつぼに入れ、１
１８０°Ｃで５時間焼成する。Example? 1 kg of Y2O3 containing 20 ppm of Tb, Eu20
0.06 kg of 3, 0.4 kg of XNa2 CO3,
Using 0.4 kg of S, and 6 kg of 3PO4, O, and Cl, these were mixed well, then placed in a sealed P crucible, and 1
Bake at 180°C for 5 hours.
焼成後の後処理については、実施例１と同様に処理し、
Ｙ２０２ Ｓ／Ｅｕコア蛍光体を得る。Post-treatment after firing was carried out in the same manner as in Example 1,
Obtain Y202 S/Eu core phosphor.
このコア蛍光体を４５分間ボールミル分散させ、実施例
１と同様の方法にて分級する。ただし静置時間は ７分
間とする。This core phosphor was dispersed in a ball mill for 45 minutes and classified in the same manner as in Example 1. However, the standing time shall be 7 minutes.
分級により得られた蛍光体を再びボールミルポットに入
れ、３０分間分散する。ボールミル後ポットより取りだ
し、純水を加え全体量を１０にとする。The phosphor obtained by classification is again placed in the ball mill pot and dispersed for 30 minutes. After ball milling, remove from the pot and add pure water to make a total volume of 10.
この懸濁液に１０％ＡＩ （ＮＯ３） ３溶液２５１を
加え、撹拌したのち希アンモニア水にてｐＨ８，５に調
整し３０分間撹拌する。A 10% AI (NO3) 3 solution 251 was added to this suspension, stirred, and then adjusted to pH 8.5 with dilute ammonia water and stirred for 30 minutes.
撹拌後静置させ、上澄液をデカンテーションにより除去
する。そして純水にて水洗を３回実施したのち、濾過、
乾燥し、篩別することにより水酸化アルミニウムで表面
処理した平均粒度４，２μｍの蛍光体が得られる。After stirring, the mixture is allowed to stand, and the supernatant liquid is removed by decantation. After washing with pure water three times, filtration,
By drying and sieving, a phosphor surface-treated with aluminum hydroxide and having an average particle size of 4.2 μm is obtained.
上記により得られた蛍光体を前記実施例１と同様に通常
の蛍光体スラリーを作成し、陰極線管用パネル上に塗布
し蛍光膜を形成した。A normal phosphor slurry was prepared from the phosphor obtained above in the same manner as in Example 1, and the slurry was applied onto a cathode ray tube panel to form a phosphor film.
この実施例では、スラリー粒度分布５０％ＤＩ平均粒度
の比が１．２５であった。In this example, the slurry particle size distribution 50% DI average particle size ratio was 1.25.
この陰極線管について、蛍光膜の切れ、および混色の特
性試験を実施例１と同一条件で行った。Regarding this cathode ray tube, characteristics tests for breakage of the fluorescent film and color mixture were conducted under the same conditions as in Example 1.
これらの結果を第１表に示す。さらに比較例２として、
平均粒度か実施例と同等で、たたしスラリー粒度分布の
５０％Ｄノ平均粒度の比が１３を超え、８．０１μｍ以
上の粒度別体積（重量）分布か１０％を超えた蛍光体に
おける特性試験を行い、実施例の結果と併せて第１表に
示した。These results are shown in Table 1. Furthermore, as comparative example 2,
In a phosphor whose average particle size is the same as in Examples, the ratio of the average particle size to 50% D of the slurry particle size distribution exceeds 13, and the volume (weight) distribution by particle size of 8.01 μm or more exceeds 10%. Characteristic tests were conducted and are shown in Table 1 together with the results of Examples.
実施例３
Ｔｂをｌｏｐｐｍ含むＹ２Ｏ３を１ｋｇ 、 Ｅｕ２０
３を０．０５［ｉｋｇ、、Ｓｍ２Ｏ３を０．００３ｋｇ
５Ｎａ２ ＣＯ３を０．４ｋｇ。Example 3 1 kg of Y2O3 containing loppm of Tb, Eu20
3 to 0.05[ikg, Sm2O3 to 0.003kg
0.4 kg of 5Na2 CO3.
Ｓを０．４５ｋｇ 、 Ｌｉ ３ ＰＯ４を０．０８ｋ
ｇ用い、これらを良く混合した後、密閉型るつほにいれ
、１１３０°Ｃで５時間焼成する。0.45kg of S, 0.08k of Li3PO4
After mixing them thoroughly, they were placed in a closed mold and baked at 1130°C for 5 hours.
焼成後の後処理については、実施例１と同様に処理し、
Ｙ２０２ Ｓ／Ｅｕコア蛍光体を得る。Post-treatment after firing was carried out in the same manner as in Example 1,
Obtain Y202 S/Eu core phosphor.
このコア蛍光体をボールミルポットに入れ、これに７９
６アンモニア水１１を加え ２時間ホールミル分散する
。Place this core phosphor in a ball mill pot and add 79
6 Add ammonia water 11 and disperse in a hole mill for 2 hours.
分散後ポットより取りたし、これに純水を加え全体＝ｔ
ｏＪ２とする。次に１０％５ｉ０２分散液１０ｎ＋ｌ、
そして０．４モル／ １２ ＺｎＳＯ４溶液３０ｎ＋Ｉ
の順に加え撹拌する。After dispersion, take it out from the pot and add pure water to it to make the whole = t
Let it be oJ2. Next, 10n+l of 10% 5i02 dispersion,
and 0.4 mol/12 ZnSO4 solution 30n+I
Add in this order and stir.
次いて希アンモニア水でｐＨ８，２に調節して３０分間
撹拌する。撹拌後静置させ、上澄液をデカンテションに
より除去する。Next, the pH was adjusted to 8.2 with dilute ammonia water and stirred for 30 minutes. After stirring, the mixture is allowed to stand, and the supernatant liquid is removed by decantation.
純水にて水洗を３回実施したのち、濾過、乾燥し篩別す
ることにより二酸化珪素と水酸化亜鉛で表面処理した、
平均粒度４．４μｍのユーロピウム・サマリウム付活酸
硫化イツトリウム蛍光体が得られる。After washing with pure water three times, the surface was treated with silicon dioxide and zinc hydroxide by filtration, drying, and sieving.
A europium samarium activated yttrium oxysulfide phosphor having an average particle size of 4.4 μm is obtained.
こうして得た蛍光体を用いて、実施例１と同様に、通常
の蛍光体スラリーを作成し、陰極線管用パネル上に塗布
し、蛍光膜を形成した。Using the phosphor thus obtained, a normal phosphor slurry was prepared in the same manner as in Example 1, and applied onto a cathode ray tube panel to form a phosphor film.
なお、蛍光体スラリー液による粒度分布測定結果より、
この実施例におけるスラリー粒度分布５註の粒度別体積
（重量）分布は２％であった。Furthermore, from the particle size distribution measurement results using the phosphor slurry liquid,
In this example, the volume (weight) distribution by particle size of the slurry particle size distribution with 5 notes was 2%.
この陰極線管について、蛍光膜の切れ、および混色の特
性試験を実施例１と同一条件で行った。Regarding this cathode ray tube, characteristics tests for breakage of the fluorescent film and color mixture were conducted under the same conditions as in Example 1.
これらの結果を第１表に示す。さらに比較例３として、
平均粒度が実施例と同等で、ただしスラリー粒度分布の
５０％ＤＩ平均粒度の比が１．３を超え、８、０１μｍ
以上の粒度別体積（重量）分布が１０％を超えた蛍光体
における特性試験を行い、実施例の結果と併せて第１表
に示した。These results are shown in Table 1. Furthermore, as comparative example 3,
The average particle size is the same as in the example, but the ratio of the 50% DI average particle size of the slurry particle size distribution exceeds 1.3 and is 8.01 μm.
Characteristic tests were conducted on the phosphors having a volume (weight) distribution by particle size of more than 10%, and the results are shown in Table 1 together with the results of Examples.
実施例４
Ｔｂを１０ｐｐｍ 含むＹ２Ｏ３を１ｋｇ 、 Ｅｕ２
０ ３を０、０５ｋｇ５Ｎａ２ Ｃ（ｈを０．４ｋｇ
， Ｓを０．４ｋｇ５Ｋ３ＰＯ４を０．０Ｇｋｇ用い、
これらを良く混合した後、密閉型るつほに入れ、１１４
０℃で５時間焼成する。Example 4 1 kg of Y2O3 containing 10 ppm of Tb, Eu2
0 3 to 0, 05kg5Na2C (h to 0.4kg
, using 0.4kg of S and 0.0Gkg of 5K3PO4,
After mixing these well, put it in a closed type rutsuho and put it in 114
Bake at 0°C for 5 hours.
焼成後の後処理については、実施例１と同様に処理し、
Ｙ２ ０ ２ Ｓ／Ｅｕコア蛍光体を得る。Post-treatment after firing was carried out in the same manner as in Example 1,
A Y2 0 2 S/Eu core phosphor is obtained.
このコア蛍光体の１ｋｇ−を１０βの純水中に懸濁させ
る。この懸濁液中にあらかじめ分散しておいた５９６’
Ｆｅ２ ０ ３分散液２２１を添加し、良く撹拌する。1 kg of this core phosphor is suspended in 10β pure water. 596′ previously dispersed in this suspension
Add Fe203 dispersion 221 and stir well.
次に４５０６アクリルエマルジヨン樹脂０．９ｍｌを加
え、２０分間撹拌する。Next, add 0.9 ml of 4506 acrylic emulsion resin and stir for 20 minutes.
撹拌後、希硫酸でｐＨ３に調節し、アクリルエマルノヨ
ンを凝固させると共に、顔料を蛍光体に接着させる。After stirring, the pH is adjusted to 3 with dilute sulfuric acid to coagulate the acrylic emulsion and adhere the pigment to the phosphor.
その後、静置し上澄液を除去し、次に純水をｌＯｅ加え
て撹拌し、そしてアンモニア水でｐＨ ７に調節し、撹
拌する。Thereafter, the mixture is allowed to stand still and the supernatant liquid is removed. Next, 1Oe of pure water is added and stirred, and the pH is adjusted to 7 with aqueous ammonia and stirred.
続いて水洗を３回実施し、つぎにボールミルにて蛍光体
を４５分間分散する。分散後ポットより取りだし、純水
を加え、全体量を１０βとする。Subsequently, washing with water is carried out three times, and then the phosphor is dispersed in a ball mill for 45 minutes. After dispersion, remove from the pot and add pure water to make the total volume 10β.
これに０．４モル／ ｆｌ ＺｎＳ０ ４溶液３０１を
加え、次いて希アンモニア水てｐＨ８．２に調節し、３
０分間撹拌する。撹拌後、純水で３回水洗したのち、濾
過し、乾燥することにより、蛍光体表面を水酸化亜鉛で
処理した平均粒度４．６μｍのベンガラ顔料被覆ユーロ
ピウム付活酸硫化イツトリウム蛍光体が得られる。To this was added 0.4 mol/fl ZnS04 solution 301, and then the pH was adjusted to 8.2 with dilute ammonia water.
Stir for 0 minutes. After stirring, the mixture is washed three times with pure water, filtered, and dried to obtain a red iron pigment-coated europium-activated yttrium oxysulfide phosphor with an average particle size of 4.6 μm and whose phosphor surface is treated with zinc hydroxide. .
こうして得た蛍光体を用いて実施例１と同様に通常の蛍
光体スラリーを作成し、陰極線管用パネル上に塗布し、
蛍光膜を形成した。Using the phosphor thus obtained, a normal phosphor slurry was prepared in the same manner as in Example 1, and applied onto a cathode ray tube panel.
A fluorescent film was formed.
この実施例においては、スラリー粒度分布５註／平均粒
度の比は１．１７であり、８．０１μｍ以上の粒度別体
積（重ｊｔ）分布は４．５％であった。In this example, the ratio of slurry particle size distribution 5 notes/average particle size was 1.17, and the volume (weight jt) distribution by particle size of 8.01 μm or more was 4.5%.
この陰極線管について、蛍光膜の切れ、および混色の特
性試験を実施例１と同一条件で行った。Regarding this cathode ray tube, characteristics tests for breakage of the fluorescent film and color mixture were conducted under the same conditions as in Example 1.
これらの結果を第１表に示す。さらに比較例４として、
平均粒度か実施例と同等で、ただしスラリー粒度分布の
５０％Ｄ／平均粒度の比が１．３を超え、８．０１μｍ
以上の粒度別体積（重量）分布か１０％を超えた蛍光体
における特性試験を行い、実施例の結果と併せて第１表
に示した。These results are shown in Table 1. Furthermore, as comparative example 4,
The average particle size is the same as in the example, but the ratio of 50% D/average particle size of the slurry particle size distribution exceeds 1.3 and is 8.01 μm.
Characteristic tests were conducted on phosphors having a volume (weight) distribution by particle size exceeding 10%, and the results are shown in Table 1 together with the results of Examples.
（以下余白）
、弔
表
＊
ストライプを形成したパネルを紫外線照射して、発光し
た蛍光膜の一定面積をショップマイクロ顕微鏡（５０倍
に拡大）によって青色、緑色蛍光膜上に付着している赤
色発光蛍光体粒子をカウントし、４か所における平均値
をとったものである。(Left below), Condolence table* A striped panel is irradiated with ultraviolet light, and a certain area of the emitted fluorescent film is examined using a shop micromicroscope (magnified 50 times) to detect the blue and red light that is attached to the green fluorescent film. The phosphor particles were counted and the average value at four locations was taken.
第１表の結果から明らかなように、本発明の赤色先光蛍
光体を用いた蛍光膜はストライプ切れが良好で、混色も
大幅に低減させることができた。As is clear from the results in Table 1, the phosphor film using the red first-emitting phosphor of the present invention had good stripe breakage and was able to significantly reduce color mixture.
［発明の効果］
以上説明したように、本発明によれば、赤色発光蛍光体
のストライプやドツトの切れを向上させ、蛍光膜の混色
を防止することができる。[Effects of the Invention] As described above, according to the present invention, it is possible to improve the sharpness of the stripes and dots of the red light-emitting phosphor and to prevent color mixing in the phosphor film.
よって高品質の陰極線管を得ることかできる。Therefore, it is possible to obtain a high quality cathode ray tube.
第１図は陰極線管を示す図である。 １・・・・・・パネル ４・・・・・外囲器 ６・・・・・・蛍光膜 FIG. 1 is a diagram showing a cathode ray tube. 1...Panel 4...Envelope 6... Fluorescent film
Claims (2)
イツトリウムを母体とする赤色発光蛍光体において、 平均粒度とスラリー粒度分布５０％Ｄの比（粒度分布５
０％Ｄ／平均粒度）が１．３以下で、かつ粒度分布の８
．０１μｍ以上の粒度別体積（重量）分布が１０％以下
である ことを特徴とする赤色発光蛍光体。(1) The average particle size of the phosphor is 4 to 5 μm, and the ratio of the average particle size to the slurry particle size distribution 50%D (particle size distribution 5
0%D/average particle size) is 1.3 or less, and the particle size distribution is 8
．． A red light-emitting phosphor characterized in that the volume (weight) distribution by particle size of 0.01 μm or more is 10% or less.
を、外囲器を構成するパネル内面に備えたことを特徴と
する陰極線管。(2) A cathode ray tube characterized in that a fluorescent film using the red light-emitting phosphor according to claim 1 is provided on the inner surface of a panel constituting an envelope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017398A JP2909118B2 (en) | 1990-01-25 | 1990-01-25 | Red light emitting phosphor and cathode ray tube using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017398A JP2909118B2 (en) | 1990-01-25 | 1990-01-25 | Red light emitting phosphor and cathode ray tube using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03220286A true JPH03220286A (en) | 1991-09-27 |
| JP2909118B2 JP2909118B2 (en) | 1999-06-23 |
Family
ID=11942888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2017398A Expired - Lifetime JP2909118B2 (en) | 1990-01-25 | 1990-01-25 | Red light emitting phosphor and cathode ray tube using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2909118B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5772918A (en) * | 1995-02-20 | 1998-06-30 | Lg Electronics Inc. | Red fluorescent composition for color cathode-ray tube |
| US6268691B1 (en) | 1998-08-26 | 2001-07-31 | Kabushiki Kaisha Toshiba | Red emitting phosphor for cathode ray tube |
| US9196800B2 (en) | 1996-06-26 | 2015-11-24 | Osram Gmbh | Light-radiating semiconductor component with a luminescence conversion element |
-
1990
- 1990-01-25 JP JP2017398A patent/JP2909118B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5772918A (en) * | 1995-02-20 | 1998-06-30 | Lg Electronics Inc. | Red fluorescent composition for color cathode-ray tube |
| US9196800B2 (en) | 1996-06-26 | 2015-11-24 | Osram Gmbh | Light-radiating semiconductor component with a luminescence conversion element |
| US6268691B1 (en) | 1998-08-26 | 2001-07-31 | Kabushiki Kaisha Toshiba | Red emitting phosphor for cathode ray tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2909118B2 (en) | 1999-06-23 |
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