JPH03269085A - Fluorescent material and cathode-ray tube - Google Patents
Fluorescent material and cathode-ray tubeInfo
- Publication number
- JPH03269085A JPH03269085A JP6824090A JP6824090A JPH03269085A JP H03269085 A JPH03269085 A JP H03269085A JP 6824090 A JP6824090 A JP 6824090A JP 6824090 A JP6824090 A JP 6824090A JP H03269085 A JPH03269085 A JP H03269085A
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- fluorescent material
- tungsten
- luminance
- voltage
- 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
- 239000000463 material Substances 0.000 title abstract 7
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 22
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 17
- 229910052688 Gadolinium Inorganic materials 0.000 claims abstract description 4
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 4
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 54
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 25
- 229910052721 tungsten Inorganic materials 0.000 claims description 25
- 239000010937 tungsten Substances 0.000 claims description 25
- 229910052693 Europium Inorganic materials 0.000 claims description 19
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 claims description 14
- UAHZTKVCYHJBJQ-UHFFFAOYSA-N [P].S=O Chemical compound [P].S=O UAHZTKVCYHJBJQ-UHFFFAOYSA-N 0.000 claims description 13
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims description 3
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 3
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 10
- -1 rare-earth metal oxysulfide Chemical class 0.000 abstract description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 5
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 3
- 238000001035 drying Methods 0.000 abstract description 3
- CMIHHWBVHJVIGI-UHFFFAOYSA-N gadolinium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Gd+3].[Gd+3] CMIHHWBVHJVIGI-UHFFFAOYSA-N 0.000 abstract description 3
- 238000007873 sieving Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- RSEIMSPAXMNYFJ-UHFFFAOYSA-N europium(III) oxide Inorganic materials O=[Eu]O[Eu]=O RSEIMSPAXMNYFJ-UHFFFAOYSA-N 0.000 abstract description 2
- 230000004907 flux Effects 0.000 abstract description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 abstract description 2
- 235000017550 sodium carbonate Nutrition 0.000 abstract description 2
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 abstract description 2
- 229910020494 K2WO4 Inorganic materials 0.000 abstract 1
- KTUFCUMIWABKDW-UHFFFAOYSA-N oxo(oxolanthaniooxy)lanthanum Chemical compound O=[La]O[La]=O KTUFCUMIWABKDW-UHFFFAOYSA-N 0.000 abstract 1
- 229910000404 tripotassium phosphate Inorganic materials 0.000 abstract 1
- 235000019798 tripotassium phosphate Nutrition 0.000 abstract 1
- WIDQNNDDTXUPAN-UHFFFAOYSA-I tungsten(v) chloride Chemical compound Cl[W](Cl)(Cl)(Cl)Cl WIDQNNDDTXUPAN-UHFFFAOYSA-I 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 abstract 1
- 230000005284 excitation Effects 0.000 description 10
- 239000012190 activator Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052771 Terbium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 229910001938 gadolinium oxide Inorganic materials 0.000 description 2
- 229940075613 gadolinium oxide Drugs 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910009372 YVO4 Inorganic materials 0.000 description 1
- 238000010420 art technique Methods 0.000 description 1
- 230000003081 coactivator Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- 229910001940 europium oxide Inorganic materials 0.000 description 1
- AEBZCFFCDTZXHP-UHFFFAOYSA-N europium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Eu+3].[Eu+3] AEBZCFFCDTZXHP-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical group O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
- QWVYNEUUYROOSZ-UHFFFAOYSA-N trioxido(oxo)vanadium;yttrium(3+) Chemical class [Y+3].[O-][V]([O-])([O-])=O QWVYNEUUYROOSZ-UHFFFAOYSA-N 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）
本発明は陰極線管用蛍光体に関し、特に赤色発光ユーロ
ピウム付活希土類酸硫化物蛍光体及び上記蛍光体からな
る蛍光膜を備えた陰極線管に関するものである。[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention relates to a phosphor for cathode ray tubes, and particularly to a red-emitting europium-activated rare earth oxysulfide phosphor and a phosphor film comprising the above-mentioned phosphor. This article relates to cathode ray tubes.
（従来の技術）
最近陰極線管は高輝度化されつつあり、これに伴って電
流輝度特性の良好な蛍光体、即ち相当に高い電流密度ま
で電流密度の増加に伴って発光輝度がほぼ直線的に増加
し飽和を示さない蛍光体、が望まれている。(Prior art) Recently, cathode ray tubes have been getting higher brightness, and along with this, phosphors with good current brightness characteristics are being used.In other words, the luminance becomes almost linear as the current density increases up to a considerably high current density. A phosphor that increases and does not exhibit saturation is desired.
これまでに、希土類蛍光体に微量の共付活剤となりうる
元素を導入して発光特性の向上を図る提案が幾つかなさ
れている。例えば、特公昭４７−１３２４３号公報では
微量のテルビウム（Ｔ ｂ）を添加することにより、発
光輝度が向上することが提案されている。また、特公昭
４７−１３２４４号公報ではマンガン（Ｍｎ）を、特公
昭４９−３２５２号公報ではアルミニウム（ＡＩ ）を
微量添加することにより、発光輝度が向上することが提
案されている。さらに、特公昭６３−４５７１９号公報
ではエルビウム（Ｅ ｒ）を添加することにより、電流
特性が向上することが提案されている。Up to now, several proposals have been made to improve the light emitting characteristics by introducing a trace amount of an element that can serve as a co-activator into rare earth phosphors. For example, Japanese Patent Publication No. 47-13243 proposes that the luminance of light emission can be improved by adding a small amount of terbium (Tb). Further, Japanese Patent Publication No. 47-13244 proposes adding a small amount of manganese (Mn), and Japanese Patent Publication No. 49-3252 proposes that the luminance of light emission can be improved by adding a small amount of aluminum (AI). Furthermore, Japanese Patent Publication No. 63-45719 proposes that the current characteristics can be improved by adding erbium (Er).
周知のように陰極線管用赤色発光蛍光体として、ユーロ
ピウム付活酸硫化イツトリウム蛍光体（Ｙ２Ｏ２Ｓ：Ｅ
ｕ）、ユーロピウム付活酸化イツトリウム蛍光体（Ｙ２
Ｏ２：Ｅｕ）、ユーロピラム付活バナジン酸イツトリウ
ム蛍光体（ＹＶＯ４。Ｅｕ）、ユーロピウム付活酸硫化
ガドリニウム蛍光体（Ｇｄ２０２Ｓ：Ｅｕ）、ユーロピ
ウム付活酸硫化ランタン蛍光体
（Ｌ ａ ２０２ Ｓ ： Ｅ ｕ）等が知られている
。これらの蛍光体のうち、発光色が実用的に十分赤く、
且つ発光輝度が高いという理由で陰極線管用赤色発光蛍
光体としては、希土類酸硫化物系の蛍光体が広く用いら
れている。特に現在実用されている陰極線管においては
、ユーロピウム付活酸硫化イツトｌ功ム赤色発光蛍光体
（Ｙ２Ｏ２Ｓ：Ｅｕ）が比較的良好な電流輝度特性を示
す。As is well known, europium-activated yttrium oxysulfide phosphor (Y2O2S:E
u), europium activated yttrium oxide phosphor (Y2
O2:Eu), europyram-activated yttrium vanadate phosphor (YVO4.Eu), europium-activated gadolinium oxysulfide phosphor (Gd202S:Eu), europium-activated lanthanum oxysulfide phosphor (L a 202 S: Eu) etc. are known. Among these phosphors, the emission color is sufficiently red for practical use.
Rare earth oxysulfide-based phosphors are widely used as red-emitting phosphors for cathode ray tubes because of their high luminance. Particularly in cathode ray tubes currently in use, a europium-activated oxysulfide-based red-emitting phosphor (Y2O2S:Eu) exhibits relatively good current brightness characteristics.
（発明が解決しようとする課題）
また、陰極線管の大型化・高品位化に伴い、蛍光面を励
起する電子線ビームの加速電圧は高電圧になり、高電圧
での蛍光体の輝度飽和が問題になってきている。このよ
うな励起条件下で、現行のユーロピウム付活希土類酸硫
化物蛍光体は比較的良好な電圧輝度特性を示すものであ
るが、十分満足のいくものでなく、従って一層の向上が
望まれている。(Problem to be solved by the invention) Additionally, as cathode ray tubes become larger and higher in quality, the accelerating voltage of the electron beam that excites the phosphor screen becomes higher voltage, and the luminance saturation of the phosphor at high voltage increases. It's becoming a problem. Under such excitation conditions, current europium-activated rare earth oxysulfide phosphors exhibit relatively good voltage-luminance characteristics, but they are not fully satisfactory, and therefore further improvements are desired. There is.
そこで、本発明者等は、ユーロピウム付活希土類酸硫化
物蛍光体の電圧輝度特性を改良し、高電圧での輝度飽和
を改善する為に種々の共付活剤について実験を行った。Therefore, the present inventors conducted experiments on various co-activators in order to improve the voltage-luminance characteristics of the europium-activated rare earth oxysulfide phosphor and improve the luminance saturation at high voltages.
従来技術では、蛍光体の電流輝度特性の向上を目的とす
るものは多くあるが、いずれも電圧輝度特性の改善につ
いては言及されていない。例えば特開昭５７１８７３８
２号公報ではＹ ＯＳ：Ｔｂ、Ｇｄ２Ｏ２Ｓ：Ｔｂな
どの緑２
色発光蛍光体に微量のタングステン（Ｗ）を添加するこ
とにより、高電流密度域での輝度飽和特性が改善される
ことが提案されている。即ち、この提案は電流輝度特性
の改善を目的としているが、電圧輝度特性については全
く考慮されていない。Although there are many prior art techniques aimed at improving the current-luminance characteristics of phosphors, none of them mentions improving the voltage-luminance characteristics. For example, Japanese Patent Publication No. 5718738
Publication No. 2 proposes that the brightness saturation characteristics in a high current density region can be improved by adding a small amount of tungsten (W) to a green two-color emitting phosphor such as YOS:Tb or Gd2O2S:Tb. ing. That is, although this proposal aims to improve current brightness characteristics, it does not take voltage brightness characteristics into consideration at all.
またこの提案は緑色発光蛍光体に関するものであり、付
活剤を異にする赤色発光蛍光体に適用した場合について
全く言及されておらず、ましてや電圧輝度特性について
は予測するすべもない。Further, this proposal relates to a green-emitting phosphor, and there is no mention of applying it to a red-emitting phosphor using a different activator, and there is no way to predict the voltage-luminance characteristics.
本発明は、上記問題を解決するためになされたもので、
発光色を実用上全く変えることなく、優れた電圧輝度特
性をもったユーロピウム付活希土類酸硫化物蛍光体およ
びこの蛍光体からなる蛍光膜を備えた陰極線管を提供す
ることを目的とする。The present invention was made to solve the above problems, and
An object of the present invention is to provide a cathode ray tube equipped with a europium-activated rare earth oxysulfide phosphor and a phosphor film made of this phosphor, which has excellent voltage-luminance characteristics without practically changing the emission color at all.
［発明の構成コ
（課題を解決するための手段と作用）
本発明者等は、ユーロピウム付活希土類酸硫化物蛍光体
の電圧輝度特性を改良し、高電圧での輝度飽和を改善す
る為に種々の共付活剤について実験を行った。その結果
、タングステンを適度の濃度で導入したユーロピウム付
活希土類酸硫化物蛍光体が優れた電圧輝度特性を有する
ことを見出し、本発明に至ったものである。[Structure of the Invention (Means and Effects for Solving the Problems) The present inventors have made an effort to improve the voltage luminance characteristics of a europium-activated rare earth oxysulfide phosphor and to improve luminance saturation at high voltages. Experiments were conducted with various co-activators. As a result, it was discovered that a europium-activated rare earth oxysulfide phosphor into which tungsten was introduced at an appropriate concentration had excellent voltage-luminance characteristics, leading to the present invention.
すなわち本発明の蛍光体は、ユーロピウム付活希土類酸
硫化物蛍光体（但し、前記希土類は、イツトリウム、ガ
ドリニウム、ランタンのうち少なくとも一種である。）
に、タングステンを０．θｆｌ［ｌｌ−０，１重量％含
有することを特徴とする陰極線管用赤色発光蛍光体であ
る。That is, the phosphor of the present invention is a europium-activated rare earth oxysulfide phosphor (provided that the rare earth is at least one of yttrium, gadolinium, and lanthanum).
Then, tungsten was added to 0. This is a red-emitting phosphor for cathode ray tubes, characterized in that it contains θfl[ll-0.1% by weight.
また本発明は、上記蛍光体からなる蛍光膜を備えたこと
を特徴とする陰極線管である。The present invention also provides a cathode ray tube characterized by comprising a phosphor film made of the above-mentioned phosphor.
以下、本発明について詳述する。The present invention will be explained in detail below.
本発明の蛍光体は、イツトリウム（Ｙ）、ガドリニウム
（Ｇｄ）、ランタン（Ｌａ）のうち少なくとも一種の希
土類についてのユーロピウム付活希土類酸硫化物蛍光体
に、タングステンを０．０００１〜０．１重量％含有さ
せたものであり、以下に述べる製造方法によって製造さ
れる。まず蛍光体の原料としては、酸化イツトリウム（
Ｙ２Ｏ２）、酸化ユーロピウム（Ｅｕ２０３）、酸化ガ
ドリニウム（Ｇｄ Ｏ）、酸化ランタン（Ｌａ２０３
）３
等の希土類酸化物、硫黄（Ｓ）、そして融剤として炭酸
ソーダ（Ｎａ２ＣＯ３）、燐酸カリウム（Ｋ３ＰＯ４）
等の通常の酸硫化物蛍光体の製造に使用される出発材料
とタングステンの原料としてｗｏ 、ｗｃｉ 、ｗ
ｃ、に２Ｗ０４等が使用５
される。これらを必要量秤量し、十分に混合して蛍光体
原料混合物を得る。The phosphor of the present invention is a europium-activated rare earth oxysulfide phosphor containing at least one rare earth element among yttrium (Y), gadolinium (Gd), and lanthanum (La), and 0.0001 to 0.1 weight of tungsten. %, and is manufactured by the manufacturing method described below. First, the raw material for the phosphor is yttrium oxide (
Y2O2), europium oxide (Eu203), gadolinium oxide (GdO), lanthanum oxide (La203)
)3 and other rare earth oxides, sulfur (S), and as fluxes soda carbonate (Na2CO3) and potassium phosphate (K3PO4).
As starting materials and raw materials for tungsten used in the production of ordinary oxysulfide phosphors such as WO, WCI, W
2W04 etc. are used for c. A necessary amount of these is weighed and thoroughly mixed to obtain a phosphor raw material mixture.
次に得られた蛍光体原料混合物をアルミナ等のルツボに
充填して蓋をして１１００〜１３００℃の温度で焼成す
る。焼成後、得られた焼成物を純水洗浄及び酸洗浄処理
して、乾燥・篩別工程を経て本発明の蛍光体が得られる
。本発明の蛍光体の化学分析の結果から、蛍光体に導入
され、るタングステンの量は最初の原料混合の仕込み時
の量の０，１〜２％の範囲にあり、最初の原料混合の仕
込み時の量により蛍光体に導入される量も変化する。Next, the obtained phosphor raw material mixture is filled into a crucible made of alumina or the like, covered with a lid, and fired at a temperature of 1100 to 1300°C. After firing, the obtained fired product is washed with pure water and washed with acid, and then subjected to a drying and sieving process to obtain the phosphor of the present invention. From the results of chemical analysis of the phosphor of the present invention, the amount of tungsten introduced into the phosphor is in the range of 0.1 to 2% of the amount at the time of initial mixing of raw materials. The amount introduced into the phosphor changes depending on the amount of time.
このようにして得られた本発明の蛍光体におけるタング
ステンの含有量と相対輝度との特性を第１図に示す。第
１図において、横軸はタングステンの含有量を重量％で
示し、縦軸は発光輝度を示す。曲線（１） 、（２）
、（３）はそれぞれ励起電圧が３０ｋＹ、 １５ｋＶ、
８ｋＶのときの従来のタングステンを含有しない蛍光
体の各励起電圧における発光輝度に対する輝度特性を表
す。但し輝度は各励起電圧での従来のタングステンを含
有しない蛍光体の発光輝度を１００とする相対輝度を以
て示している。FIG. 1 shows the characteristics of the tungsten content and relative brightness in the phosphor of the present invention thus obtained. In FIG. 1, the horizontal axis shows the tungsten content in weight percent, and the vertical axis shows the luminance. Curve (1), (2)
, (3) have excitation voltages of 30 kY and 15 kV, respectively.
The luminance characteristics of the conventional tungsten-free phosphor with respect to the luminance at each excitation voltage at 8 kV are shown. However, the brightness is expressed as a relative brightness based on the luminance of a conventional tungsten-free phosphor at each excitation voltage as 100.
ここでタングステンが０．０００１重量％より少ないと
、電圧輝度特性の改善は認められず、又０，１重量％を
越えると、輝度低下が著しくなる。実用上はタングステ
ンの含有量は０．［ＩＯ＋乃至０．０１重量％の範囲で
あることが好ましい。更に好ましくは、０．００３乃至
０．００４重量％付近が良好な特性を示す。If tungsten is less than 0.0001% by weight, no improvement in voltage-luminance characteristics will be observed, and if it exceeds 0.1% by weight, the brightness will be significantly lowered. In practice, the tungsten content is 0. [It is preferably in the range of IO+ to 0.01% by weight. More preferably, a content of about 0.003 to 0.004% by weight exhibits good properties.
また、高電圧域はど、タングステン含有による発光輝度
の特性の向上が明らかに認められる。Furthermore, in the high voltage range, it is clearly recognized that the luminance characteristics are improved by the inclusion of tungsten.
このように本発明の蛍光体は従来の蛍光体と比較して電
圧輝度特性に優れ、特に高電圧域での発光輝度の向上が
実現されていることがわかる。As described above, it can be seen that the phosphor of the present invention has excellent voltage-luminance characteristics compared to conventional phosphors, and particularly improves the luminance in the high voltage range.
（実施例） 以下実施例によって更に詳細に本発明を説明する。(Example) The present invention will be explained in more detail with reference to Examples below.
まず、下記のＮｏ、１〜Ｎｏ、６に示した蛍光体原料を
秤量する。First, the phosphor raw materials shown in No. 1 to No. 6 below are weighed.
実施例 Ｎｏ、１） Ｙ２Ｏ３９５ｇＥｕ２Ｏ３５ｇ
Ｓ ４０ｇ
Ｎａ、、 Ｃｏ３４Ｃｏ
３４ＯＩＯｇ
４
ＷＯ３Ｇ、５ｇ
実施例 Ｎｏ、２） Ｙ２Ｏ３９５ｇＥｕ２Ｏ３４，
９２ｇ
８ ４０ｇ
実施例 Ｎｏ、３）
Ｎａ２Ｃ０３４０ｇ
ＫＰＯ１０ｇ
４
ＷＯ３０，２ｇ
Ｔｂ４０７０．０１１３ｇ
Ｙ２Ｏ３９５ｇ
Ｅｕ２Ｏ３４，９２ｇ
５ ４０ｇ
実施例 Ｎｏ、４）
実施例 Ｎｏ、５）
Ｎａ２Ｃ０３４ａｇ
Ｋ ＰＯ２１０ｇ
ＷＯ３１，０ｇ
Ｙ２Ｏ３９５ｇ
Ｅｕ２Ｏ３ｊ、７０ｇ
３ ４０ｇ
Ｎａ２ＣＯ３４０ｇ
ＫＰＯＩＯｇ
４
ＷＯ３０，５ｇ
５ｍ Ｏ０，３ｇ
３
ＧｄＯ９５ｇ
３
Ｅｕ、、０３４．７０ｇ
５ ４０ｇ
Ｎ ａ ２ ＣＯａ ４［１ｇ
ＫＰＯＩＯｇ
４
Ｗ ０３１０ ｇ
実施例 Ｎｏ、６） Ｌａ ０ ９５ｇ３
Ｅ ｕ ２０ａ ５ｇ
Ｓ ４０ｇ
Ｎａ２ＣＯ３４０ｇ
ＫＰＯｌａｇ
４
ｗｏ３０．０４ｇ
次に上記実施例Ｎｏ、１乃至Ｎｏ、 ６の原料を十分
に混合して蛍光体原料混合物を得る。次に得られた蛍光
体原料混合物をアルミナ等のルツボに充填して蓋をして
１１００℃の温度で焼成する。焼成後、得られた焼成物
を純水洗浄及び酸洗浄処理して、乾燥・篩別工程を経て
、本発明のタングステンの含有されたユーロピウム付活
希土類酸硫化物蛍光体が得られる。Example No. 1) Y2O395gEu2O35g S 40g Na,, Co34Co 34OIOg 4 WO3G, 5g Example No. 2) Y2O395gEu2O34,
92g 8 40g Example No.3) Na2C0340g KPO10g 4 WO30.2g Tb4070.0113g Y2O395g Eu2O34.92g 5 40g Example No.4) Example No.5) Na2C034ag K PO210g WO31,0g Y2O395g Eu2O3j,70g 3 40g Na2CO340g KPOIOg 4 WO30.5g 5m O0.3g 3 GdO95g 3 Eu,,034.70g 5 40g Na 2 COa 4 [1g KPOIOg 4 W 0310 g Example No. 6) La 0 95g3 Eu 20a 5g S 40g Na2C O340g KPOlag 4 wo30 .04g Next, the raw materials of Examples No. 1 to No. 6 above are thoroughly mixed to obtain a phosphor raw material mixture. Next, the obtained phosphor raw material mixture is filled into a crucible made of alumina or the like, covered with a lid, and fired at a temperature of 1100°C. After firing, the obtained fired product is washed with pure water and acid, and then subjected to a drying and sieving process to obtain the tungsten-containing europium-activated rare earth oxysulfide phosphor of the present invention.
第２図に上記実施例Ｎｏ、１乃至Ｎｏ、６の蛍光体の励
起電圧が５ｋＶを基準とした電圧輝度特性を示す。第２
図において横軸は電圧（ｋＶ）、縦軸は電流を２００μ
Ａとし、た時の５ｋＶの励起電圧での輝度を１Ｏｌｌと
した相対値複示し、特性（１）乃至特性（６）はそれぞ
れ上記実施例Ｎｏ、１乃至Ｎｏ、 ５の蛍光体、特性
（７）はタングステンを含有しない従来の蛍光体、特性
（８）はタングステンの含有量が０．１１２重量％の蛍
光体を示している。タングステンを含有しない従来の蛍
光体の特性（ア）に比べ、本発明のタングステンを含有
した蛍光体の特性（１）乃至（６）は高電圧域で輝度が
顕著に向上し、タングステンの含有量が［１，Ｈ３乃至
Ｌ Ｑ（１４重量％のときの特性（１）及び（４）が特
に顕著に向上しているのがわかる。また、タングステン
の含有量が０．１重量％を越える特性（８）は電圧輝度
特性が劣化していることがわかる。FIG. 2 shows the voltage-luminance characteristics of the phosphors of Examples No. 1 to No. 6, based on an excitation voltage of 5 kV. Second
In the figure, the horizontal axis is voltage (kV), and the vertical axis is current at 200μ
Characteristics (1) to (6) are for the phosphors of Example No. 1 to No. 5, and characteristic (7), respectively. ) shows a conventional phosphor containing no tungsten, and characteristic (8) shows a phosphor with a tungsten content of 0.112% by weight. Compared to the characteristics (a) of the conventional phosphor that does not contain tungsten, the characteristics (1) to (6) of the tungsten-containing phosphor of the present invention are that the brightness is significantly improved in the high voltage range; It can be seen that the properties (1) and (4) are particularly markedly improved when [1,H3 to LQ (14% by weight). Also, the properties when the tungsten content exceeds 0.1% by weight It can be seen that (8) has deteriorated voltage-luminance characteristics.
次に第１表に上記実施例Ｎｏ、１乃至Ｎｏ、６の蛍光体
の励起電圧が５ｋＶにおける輝度を基準として励起電圧
が３０ｋＶの場合における相対輝度及びタングステンを
含有しない従来の蛍光体の励起電圧が３０ｋＶの場合に
おける相対輝度に対する輝度向上率を示す。Next, Table 1 shows the relative brightness when the excitation voltage is 30 kV, based on the brightness at the excitation voltage of 5 kV of the phosphors of Examples No. 1 to No. 6 above, and the excitation voltage of the conventional phosphor that does not contain tungsten. The brightness improvement rate with respect to the relative brightness when is 30kV is shown.
第１表
第１表において、相対輝度の欄は５ｋＶの励起電圧での
輝度を基準とした場合における３０ｋＶの励起電圧での
相対値を示しているが、従来のタングステンを含有して
いない蛍光体との比較については第２図より１１５％と
なることがわかる。即ち、輝度向上率の欄は従来のタン
グステンを含有し５ない蛍光体に対する発光輝度の向上
率を示し２てる。第１表から明らかなように、本発明の
蛍光体は従来のタングステンを含有しない蛍光体よりも
電圧輝度特性が優れていることがわかる。尚、前述のよ
うにタングステンの含有量により輝度特性は異なるので
、要求される輝度特性を考慮して適宜含有量を決定すれ
ばよい。Table 1 In Table 1, the relative luminance column shows the relative value at an excitation voltage of 30 kV when the luminance at an excitation voltage of 5 kV is taken as a reference. As for the comparison with Figure 2, it can be seen that it is 115%. That is, the luminance improvement rate column shows the improvement rate of luminance compared to the conventional phosphor containing tungsten. As is clear from Table 1, the phosphor of the present invention has better voltage-luminance characteristics than the conventional tungsten-free phosphor. Note that, as described above, the brightness characteristics vary depending on the content of tungsten, so the content may be appropriately determined in consideration of the required brightness characteristics.
また、画像のコントラストを改善するため蛍光体にフィ
ルター物質を被覆した蛍光体が使用されているが、本発
明の蛍光体にフィルター物質を被覆しても、電圧輝度特
性に何等変わりのない良好な蛍光体が得られる。Furthermore, in order to improve image contrast, a phosphor coated with a filter substance is used, but even if the phosphor of the present invention is coated with a filter substance, there is no change in the voltage-luminance characteristics. A phosphor is obtained.
また本発明の蛍光体にＴｂ、Ｐｒ、Ｓｍのうちの少なく
とも一種を共付活剤として含有することもできる。Furthermore, the phosphor of the present invention may contain at least one of Tb, Pr, and Sm as a coactivator.
次に、公知の製造方法により、上記蛍光体を用いて陰極
線管の蛍光面を作成した。得られた陰極線管による特性
はほぼ第１表と同じであることが確認された。Next, a phosphor screen of a cathode ray tube was fabricated using the above phosphor using a known manufacturing method. It was confirmed that the characteristics of the obtained cathode ray tube were almost the same as those shown in Table 1.
Ｃ発明の効果コ
以上のように本発明のタングステンを微量導入したユー
ロピウム付活希土類酸硫化物蛍光体は電圧輝度特性に優
れ、高電圧域において高い発光輝度が得られ、陰極線管
用蛍光体として非常に優れており、本発明の効果は極め
て大である。C. Effects of the Invention As described above, the europium-activated rare earth oxysulfide phosphor of the present invention into which a small amount of tungsten is introduced has excellent voltage-luminance characteristics and high luminance in the high voltage range, making it extremely suitable as a phosphor for cathode ray tubes. The effect of the present invention is extremely large.
また、本発明の蛍光体からなる蛍光膜を備えた陰極線管
も同様に優れた電圧輝度特性を有する。Furthermore, a cathode ray tube equipped with a phosphor film made of the phosphor of the present invention similarly has excellent voltage-luminance characteristics.
第１図はユーロピウム付活希土類酸硫化物蛍光体に含有
するタングステンの量と発光輝度上の関係を示す特性図
、第２図はユーロピウム付活希土類酸硫化物蛍光体にタ
ングステンを含有した本発明の蛍光体と従来の蛍光体の
電圧輝度特性を示す特性図である。Fig. 1 is a characteristic diagram showing the relationship between the amount of tungsten contained in a europium-activated rare earth oxysulfide phosphor and luminance, and Fig. 2 is a characteristic diagram showing the relationship between the amount of tungsten contained in a europium-activated rare earth oxysulfide phosphor and the present invention containing tungsten in a europium-activated rare earth oxysulfide phosphor. FIG. 2 is a characteristic diagram showing the voltage-luminance characteristics of a conventional phosphor and a conventional phosphor.
Claims (2)
グステンを０．０００１〜０．１重量％含有することを
特徴とする蛍光体。（但し、上記希土類は、イットリウ
ム、ガドリニウム、ランタンのうち少なくとも一種であ
る。）(1) A phosphor characterized by containing 0.0001 to 0.1% by weight of tungsten in a europium-activated rare earth oxysulfide phosphor. (However, the above rare earth is at least one of yttrium, gadolinium, and lanthanum.)
極線管。(2) A cathode ray tube comprising a phosphor film made of the phosphor according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2068240A JPH0726098B2 (en) | 1990-03-20 | 1990-03-20 | Phosphor for cathode ray tube and cathode ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2068240A JPH0726098B2 (en) | 1990-03-20 | 1990-03-20 | Phosphor for cathode ray tube and cathode ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03269085A true JPH03269085A (en) | 1991-11-29 |
| JPH0726098B2 JPH0726098B2 (en) | 1995-03-22 |
Family
ID=13368057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2068240A Expired - Fee Related JPH0726098B2 (en) | 1990-03-20 | 1990-03-20 | Phosphor for cathode ray tube and cathode ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0726098B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100428612B1 (en) * | 1996-12-13 | 2004-12-29 | 삼성에스디아이 주식회사 | Red phosphor for an active luminous-type liquid crystal display, especially concerned with increasing brightness compared to a deep red phosphor |
| US7537714B2 (en) | 2004-12-24 | 2009-05-26 | Samsung Sdi Co., Ltd. | Yttrium based phosphors comprising conducting material, process for preparing the yttrium based phosphors and display device using the yttrium based phosphors |
| US8896004B2 (en) | 2005-04-26 | 2014-11-25 | Kabushiki Kaisha Toshiba | White LED, backlight using the same, and liquid crystal display device |
| CN116496788A (en) * | 2023-04-28 | 2023-07-28 | 长春理工大学 | Method for enhancing luminous intensity of terbium-doped gadolinium oxysulfide fluorescent material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5418484A (en) * | 1977-07-12 | 1979-02-10 | Dainippon Toryo Co Ltd | Luminous composition and fluorescent display tube excited by low speed electron beam |
| JPS57187382A (en) * | 1981-05-12 | 1982-11-18 | Nichia Kagaku Kogyo Kk | Rare earth phosphor |
| JPS644691A (en) * | 1987-06-26 | 1989-01-09 | Toshiba Corp | Phosphor |
-
1990
- 1990-03-20 JP JP2068240A patent/JPH0726098B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5418484A (en) * | 1977-07-12 | 1979-02-10 | Dainippon Toryo Co Ltd | Luminous composition and fluorescent display tube excited by low speed electron beam |
| JPS57187382A (en) * | 1981-05-12 | 1982-11-18 | Nichia Kagaku Kogyo Kk | Rare earth phosphor |
| JPS644691A (en) * | 1987-06-26 | 1989-01-09 | Toshiba Corp | Phosphor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100428612B1 (en) * | 1996-12-13 | 2004-12-29 | 삼성에스디아이 주식회사 | Red phosphor for an active luminous-type liquid crystal display, especially concerned with increasing brightness compared to a deep red phosphor |
| US7537714B2 (en) | 2004-12-24 | 2009-05-26 | Samsung Sdi Co., Ltd. | Yttrium based phosphors comprising conducting material, process for preparing the yttrium based phosphors and display device using the yttrium based phosphors |
| US8896004B2 (en) | 2005-04-26 | 2014-11-25 | Kabushiki Kaisha Toshiba | White LED, backlight using the same, and liquid crystal display device |
| CN116496788A (en) * | 2023-04-28 | 2023-07-28 | 长春理工大学 | Method for enhancing luminous intensity of terbium-doped gadolinium oxysulfide fluorescent material |
| CN116496788B (en) * | 2023-04-28 | 2024-04-09 | 长春理工大学 | Method for enhancing luminous intensity of terbium-doped gadolinium oxysulfide fluorescent material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0726098B2 (en) | 1995-03-22 |
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