JPH108043A - Fluorescent substance for cathode ray tube - Google Patents

Fluorescent substance for cathode ray tube

Info

Publication number
JPH108043A
JPH108043A JP8163978A JP16397896A JPH108043A JP H108043 A JPH108043 A JP H108043A JP 8163978 A JP8163978 A JP 8163978A JP 16397896 A JP16397896 A JP 16397896A JP H108043 A JPH108043 A JP H108043A
Authority
JP
Japan
Prior art keywords
phosphor
zirconia
silica
cathode ray
emitting phosphor
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
Application number
JP8163978A
Other languages
Japanese (ja)
Other versions
JP3491448B2 (en
Inventor
Toshiyuki Hirai
利幸 平井
Yoshiaki Shizuki
義晶 志築
Masaji Nakajima
正次 中嶋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nichia Chemical Industries Ltd
Original Assignee
Nichia Chemical Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nichia Chemical Industries Ltd filed Critical Nichia Chemical Industries Ltd
Priority to JP16397896A priority Critical patent/JP3491448B2/en
Publication of JPH108043A publication Critical patent/JPH108043A/en
Application granted granted Critical
Publication of JP3491448B2 publication Critical patent/JP3491448B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To obtain a fluorescent substance for a cathode ray tube excellent in coating characteristics on the color cathode ray tube and causing little color mixing by coating a specific zirconia and silica on a fluorescent substance. SOLUTION: This fluorescent substance for a cathode ray tube is obtained by adhering 0.005-1.0wt.% zirconia (ZrO2 ) and 0.05-2.0wt.% silica (SiO2 ) both based on the fluorescent substance on a particle surface of the fluorescent substance. Moreover, the average particle diameter of the zirconia is preferably 0.01-0.2μ and zinc hydroxide as a binder material for adhering the simple zirconia, or the zirconia and the silica, on the particle surface of the fluorescent substance is exemplified.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は陰極線蛍光体に係り、特
にカラー陰極線管への塗布特性に優れた蛍光体に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray phosphor, and more particularly, to a phosphor excellent in coating characteristics on a color cathode ray tube.

【0002】[0002]

【従来の技術】周知のように、カラー陰極線管の蛍光面
は、緑色、青色、及び赤色発光蛍光体がドット状または
ストライプ状に形成されている。一般に、この蛍光面の
形成にはスラリー法が用いられる。スラリー法とは大ま
かに述べると次の通りである。主としてPVA(ポリビ
ニルアルコール)とADC(重クロム酸アンモニウム)
とを含む水溶液に、蛍光体を懸濁させて塗布スラリーを
調製する。この塗布スラリーを、回転塗布機に装着され
たカラー陰極線管のフェースプレート内面に流し込み、
全体に拡げた後、余分のスラリーを所定の速度で振り切
り、乾燥して蛍光体層を形成する。そして、高圧水銀灯
の紫外線光源によりシャドーマスクを介してドットまた
はストライプ状の所定のパターンに露光し、現像によ
り、未露光の余剰の蛍光体層を洗い流すことによって、
蛍光膜を形成する方法である。この操作は、緑色、青
色、赤色発光蛍光体についてそれぞれ順に行われる。こ
のようなスラリー法により形成された蛍光面には、おお
むね次のような特性が要求される。
2. Description of the Related Art As is well known, green, blue, and red light emitting phosphors are formed on a phosphor screen of a color cathode ray tube in the form of dots or stripes. Generally, a slurry method is used for forming the phosphor screen. The slurry method is roughly described as follows. Mainly PVA (polyvinyl alcohol) and ADC (ammonium dichromate)
The phosphor is suspended in an aqueous solution containing the following to prepare a coating slurry. This coating slurry is poured into the face plate inner surface of the color cathode ray tube mounted on the spin coating machine,
After spreading the whole, excess slurry is shaken off at a predetermined speed and dried to form a phosphor layer. Then, by exposing to a predetermined pattern of dots or stripes through a shadow mask by an ultraviolet light source of a high-pressure mercury lamp, and developing, by washing away the unexposed excess phosphor layer,
This is a method for forming a fluorescent film. This operation is performed for the green, blue, and red light-emitting phosphors, respectively. The phosphor screen formed by such a slurry method generally requires the following characteristics.

【0003】(1)ツマリが良いこと。すなわち均一な
膜厚で緻密なドットまたはストライプが形成されている
こと。ツマリが良いことは陰極線管の蛍光面の輝度を向
上する。(2)キレが良いこと。すなわち所定の位置
に、所定の形状、幅でドットまたはストライプが形成さ
れていること。 (3)蛍光体層とフェースプレートとの間の接着力が大
きいこと。接着力が小さいとドットまたはストライプ剥
がれを起こし、蛍光面の形成工程の歩留まりを低下させ
てしまう。 (4)混色がないこと。すなわち、1つの発光成分のド
ットまたはストライプを構成する蛍光体が、隣接する他
の発光成分の蛍光体に混入しないこと。この混色が起こ
ると、緑色、青色、赤色発光成分の色純度が低下し、そ
の結果、カラー陰極線管の色再現範囲が低下する。 (5)残渣がないこと。すなわち、未露光の蛍光体層を
洗い流した際に、蛍光体層がフェースプレートに残らな
いこと。これも、カラー陰極線管の色再現範囲の低下に
つながる。
(1) Good quality. That is, dense dots or stripes are formed with a uniform film thickness. A good balance improves the brightness of the fluorescent screen of the cathode ray tube. (2) Good sharpness. That is, dots or stripes having a predetermined shape and width are formed at predetermined positions. (3) The adhesive strength between the phosphor layer and the face plate is large. If the adhesive strength is small, dots or stripes are peeled off, and the yield in the process of forming the phosphor screen is reduced. (4) No color mixing. That is, the phosphor constituting the dot or stripe of one light emitting component is not mixed with the phosphor of another adjacent light emitting component. When this color mixture occurs, the color purity of the green, blue, and red light emitting components decreases, and as a result, the color reproduction range of the color cathode ray tube decreases. (5) There is no residue. That is, the phosphor layer does not remain on the face plate when the unexposed phosphor layer is washed away. This also leads to a reduction in the color reproduction range of the color cathode ray tube.

【0004】上記特性は、蛍光体の表面状態により影響
を受ける。このため、数々の処理物質を蛍光体に付着し
て蛍光体の表面状態を改良した種々の陰極線管用蛍光体
が開発されている。
The above characteristics are affected by the surface condition of the phosphor. For this reason, various phosphors for cathode ray tubes have been developed in which a number of treatment substances are attached to the phosphor to improve the surface state of the phosphor.

【0005】現在、最も多く使用されている表面処理物
質として二酸化ケイ素(SiO2;以下、シリカとい
う。)あるいはケイ酸塩化合物がある。これらは一般に
蛍光体懸濁液に微粒子シリカまたはケイ酸イオンを含む
水溶液を添加し、さらにZn、Alイオン等を含む電解
質溶液を添加することにより、添加物を蛍光体表面に付
着させることにより得られる。例えば、特公昭50−1
5747号公報においては、蛍光体にカリ水ガラスと硫
酸亜鉛を添加して蛍光体をケイ酸亜鉛で被覆する方法が
開示される。また、特公昭61−46512号公報に
は、シリカと亜鉛化合物を被覆した蛍光体が開示されて
いる。
At present, silicon dioxide (SiO 2; hereinafter, referred to as silica) or a silicate compound is most frequently used as a surface treatment substance. These are generally obtained by adding an additive to the phosphor surface by adding an aqueous solution containing fine-particle silica or silicate ions to the phosphor suspension and further adding an electrolyte solution containing Zn, Al ions and the like. Can be For example, Japanese Patent Publication No. 50-1
Japanese Patent No. 5747 discloses a method of adding potassium water glass and zinc sulfate to a phosphor and coating the phosphor with zinc silicate. JP-B-61-46512 discloses a phosphor coated with silica and a zinc compound.

【0006】[0006]

【発明が解決しようとする課題】以上のような方法によ
り粒子表面を被覆された陰極線管用蛍光体は、上記した
(1)〜(5)の塗布特性はある程度満足するため、現
在も多く使用されているが、ハイビジョンテレビあるい
は高精細度の陰極線管等が開発されるに従い、さらに優
れた塗布特性を有する蛍光体の開発が強く望まれてい
る。
The phosphor for a cathode ray tube coated with a particle surface by the above-described method satisfies the above-mentioned coating characteristics (1) to (5) to some extent, and therefore is still widely used. However, as a high-definition television or a high-definition cathode ray tube is developed, there is a strong demand for the development of a phosphor having more excellent coating characteristics.

【0007】本発明はこのような事情に鑑みなされたも
のであり、上記特性を全て満足し、特に(4)混色の少
ない優れた陰極線管用蛍光体を提供することを目的とす
る。
The present invention has been made in view of such circumstances, and an object of the present invention is to provide an excellent phosphor for a cathode ray tube which satisfies all of the above characteristics, and which is particularly excellent in (4) color mixture.

【0008】[0008]

【課題を解決するための手段】本発明者は、混色を改善
するには、蛍光体の粒子表面を改質することが必要であ
ると考え、数多くの表面処理剤を蛍光体粒子表面に付着
して塗布特性を確認する膨大な試験を行った結果、特定
量のジルコニア(ZrO2)とシリカ(SiO2)を蛍光
体に塗布することにより、課題を解決できることを見い
だし本発明を完成させるに至った。
The inventor of the present invention believes that it is necessary to modify the surface of the phosphor particles in order to improve the color mixture, and attaches many surface treating agents to the surface of the phosphor particles. As a result of extensive tests for confirming coating characteristics, it was found that the problem could be solved by applying a specific amount of zirconia (ZrO2) and silica (SiO2) to the phosphor, and the present invention was completed. .

【0009】すなわち、本発明の陰極線管用蛍光体は、
蛍光体粒子表面に、蛍光体に対して0.005〜1.0
重量%のジルコニアと、蛍光体に対して0.05〜2.
0のシリカが付着されていることを特徴とする。
That is, the phosphor for a cathode ray tube according to the present invention comprises:
0.005 to 1.0 with respect to the phosphor on the phosphor particle surface
% By weight of zirconia and 0.05 to 2.
0 silica is attached.

【0010】また、ジルコニアの平均粒子径は0.01
〜0.2μmであることが好ましい。
The average particle diameter of zirconia is 0.01
It is preferably from 0.2 to 0.2 μm.

【0011】さらに、蛍光体粒子表面にジルコニア単
独、あるいはジルコニア及びシリカを付着させるバイン
ダー物質として、水酸化亜鉛、水酸化アルミニウム、ア
クリル樹脂、アラビアゴム及びゼラチンによるコアセル
ベート、アルギン酸塩、尿素樹脂の群から選ばれる少な
くとも一種が付着されていることが好ましい。
Further, as a binder substance for adhering zirconia alone or zirconia and silica to the surface of the phosphor particles, the binder may be selected from the group consisting of coacervate, alginate, and urea resin of zinc hydroxide, aluminum hydroxide, acrylic resin, gum arabic and gelatin. It is preferable that at least one selected from them is attached.

【0012】[0012]

【発明の実施の形態】カラー陰極線管のフェースプレー
ト内面の蛍光体ストライプあるいはドットの形成方法の
原理上、他色の蛍光体が現像後にも残留し、これが混色
の原因となる。例えば、最初に緑色発光蛍光体、次に青
色発光蛍光体、最後に赤色発光蛍光体を塗布する場合、
緑色発光蛍光体のストライプ(G)の上に青色発光蛍光
体(b)を一様に塗布し、露光、現像して、その隣に青
色発光蛍光体ストライプ(B)を形成する。この(B)
の形成の現像時に(G)の中に青色蛍光体(b)が残留
する。この残留による混色を(b/G)と表す。さら
に、(G)、(B)の上には赤色発光蛍光体(r)が一
様に塗布され、露光、現像して残りのサイトに赤色発光
蛍光体ストライプ(R)を形成する。この(R)の形成
の現像時に(G)、(B)の中に赤色発光蛍光体(r)
が残留する。これらを(r/G)、(r/B)として表
現する。このように、下地ストライプへの他色蛍光体の
残留の結果、混色が引き起こされる。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Due to the principle of the method of forming phosphor stripes or dots on the inner surface of a face plate of a color cathode ray tube, phosphors of other colors remain after development and cause color mixing. For example, when first applying a green light emitting phosphor, then a blue light emitting phosphor, and finally applying a red light emitting phosphor,
A blue light-emitting phosphor (b) is uniformly applied on the green light-emitting phosphor stripe (G), exposed and developed to form a blue light-emitting phosphor stripe (B) adjacent thereto. This (B)
The blue phosphor (b) remains in (G) during the development of the formation of (A). The color mixture due to the residual is represented by (b / G). Further, a red light-emitting phosphor (r) is uniformly applied on (G) and (B), exposed and developed to form a red light-emitting phosphor stripe (R) on the remaining sites. During the development of the formation of (R), the red light-emitting phosphor (r) is contained in (G) and (B).
Remain. These are expressed as (r / G) and (r / B). As described above, color mixing is caused as a result of the remaining phosphors remaining on the underlying stripe.

【0013】この混色は、(1)下地のストライプある
いはドットの蛍光体層が、他色蛍光体を残留させやすい
傾向、及び(2)後から塗布する蛍光体が、他色ストラ
イプあるいはドットの中に残留しやすい傾向、の二つの
要因に依存する。本発明は、主として、(1)に起因す
る混色を低減することを目的とする。すなわち、下地に
塗布する蛍光体の粒子表面を改質することにより混色を
受け難くしている。
This mixed color is caused by (1) a tendency that the phosphor layer of the underlying stripe or dot tends to cause the phosphor of another color to remain, and (2) that the phosphor to be applied later is formed by the phosphor layer of the other color or dot. Tend to remain in the water, depending on two factors. An object of the present invention is to reduce color mixture caused by (1). That is, by modifying the particle surface of the phosphor applied to the base, color mixing is hardly caused.

【0014】下地ストライプあるいはドットを形成する
蛍光体の混色防止に要求される要因とは、塗布面に凸凹
がなく、後から塗布される蛍光体が現像により容易に洗
い落とされるという物理的な要因、及び、後から塗布さ
れる蛍光体粒子との親和力があまり大きくないという化
学的な要因があり、これら何れも満たしていることが必
要である。
The factor required for preventing color mixture of the phosphor forming the underlying stripe or dot is a physical factor that there is no unevenness on the coated surface and the phosphor applied later is easily washed off by development. There is a chemical factor that the affinity with the phosphor particles to be applied later is not so large, and it is necessary to satisfy all of them.

【0015】ジルコニアとは、組成式がZrO2である
ジルコニウムの酸化物であり、本発明においては、平均
粒子径が0.01〜0.2μmであることが好ましい。
この範囲より大きくなると、ジルコニアの比表面積が小
さくなることで、蛍光体の親和力に及ぼす効果は小さく
なり、その結果付着量をかなり多くしなければならなく
なり、蛍光体を凝集する弊害を起こす。
Zirconia is an oxide of zirconium having a composition formula of ZrO2. In the present invention, the average particle diameter is preferably 0.01 to 0.2 μm.
If it is larger than this range, the specific surface area of zirconia becomes small, so that the effect on the affinity of the phosphor becomes small. As a result, the amount of the zirconia must be considerably increased, causing a problem of agglomeration of the phosphor.

【0016】蛍光体粒子表面にジルコニア単独、あるい
はジルコニア及びシリカを付着させるバインダー物質と
して、従来から用いられている水酸化亜鉛、水酸化アル
ミニウムの無機物の水酸化物、あるいはアクリル樹脂、
アラビアゴム及びゼラチンによるコアセルベート、アル
ギン酸塩、尿素樹脂等の有機物のバインダーが好ましく
使用できる。
As a binder substance for attaching zirconia alone or zirconia and silica to the surface of the phosphor particles, conventionally used zinc hydroxide, inorganic hydroxide of aluminum hydroxide, or acrylic resin,
Organic binders such as coacervate, alginate, and urea resin using gum arabic and gelatin can be preferably used.

【0017】図1は青色発光蛍光体ストライプ(B)を
形成する蛍光体にジルコニアを付着した場合の赤色発光
蛍光体(r)の混色(r/B)の、ジルコニアを付着し
ていない基準蛍光体に対する相対比をプロットした図で
ある。図1より(r/B)の相対値は、ジルコニアの付
着量とともに減少し、青色発光蛍光体に対し0.1wt
%の付着で、ジルコニアを付着していないものに対し6
割に低下し、0.4wt%の付着で、ジルコニアを付着
していないものに対し4割の極小となる。この効果につ
いては、青色発光蛍光体にジルコニアを付着することに
より、後から塗布する赤色発光蛍光体(r)との間の化
学親和力が低下したためと推定している。
FIG. 1 shows a reference fluorescence of a mixed color (r / B) of a red light-emitting phosphor (r) when zirconia is adhered to a phosphor forming a blue light-emitting phosphor stripe (B) without zirconia attached. It is the figure which plotted the relative ratio to the body. From FIG. 1, the relative value of (r / B) decreases with the amount of zirconia attached, and is 0.1 wt.
%, 6% of those without zirconia
The adhesion is 0.4% by weight, and the adhesion is 0.4%, which is a minimum of 40% as compared with the case where zirconia is not attached. This effect is presumed to be due to the fact that the attachment of zirconia to the blue light-emitting phosphor reduced the chemical affinity with the red light-emitting phosphor (r) to be applied later.

【0018】しかし、それ以上添加すると、(r/B)
の相対値は逆に増大する。これは、ジルコニアの添加と
ともに、青色発光蛍光体が凝集傾向となり、ストライプ
(B)の塗布面が粗くなり、(B)の表面の凸凹に赤色
発光蛍光体(r)が立体的に捕捉され、現像により容易
に除くことができなくなったことが原因している。
However, if added more, (r / B)
Increases in the opposite way. This is because, together with the addition of zirconia, the blue light-emitting phosphor tends to aggregate, the coated surface of the stripe (B) becomes rough, and the red light-emitting phosphor (r) is three-dimensionally captured in the unevenness of the surface of (B). This is because it cannot be easily removed by development.

【0019】図2に青色発光蛍光体に対するジルコニア
の塗布量と塗布面の評価との関係を示す。この場合の塗
布面の評価は、ブラウン管フェースプレートに青色発光
蛍光体を一様に塗布し、塗布面を肉眼により5段階評価
した結果である。点数が高くなるほど塗布面は良好とな
る。青色発光蛍光体に対するジルコニアの付着量が0.
4wt%未満では、ほぼ塗布面は5で良好であるが、こ
れより多くなると青色発光蛍光体は凝集傾向となり、塗
布面の評価は大きく低下している。この塗布面が粗くな
ることで、(B)表面が凸凹となり、図1のジルコニア
の付着量が0.4wt%より多くなる領域の(r/B)
の相対値の低下原因について合理的に説明できる。
FIG. 2 shows the relationship between the amount of zirconia applied to the blue light emitting phosphor and the evaluation of the coated surface. The evaluation of the coated surface in this case is a result of uniformly applying the blue light-emitting phosphor on the cathode ray tube face plate and evaluating the coated surface with the naked eye in five steps. The higher the score, the better the coated surface. The amount of zirconia attached to the blue light-emitting phosphor is 0.
When the content is less than 4 wt%, the coated surface is almost good at 5, but when the content is more than 5, the blue light emitting phosphor tends to aggregate, and the evaluation of the coated surface is greatly reduced. When the coating surface becomes rough, the surface (B) becomes uneven, and the (r / B) of the region where the amount of zirconia adhered is more than 0.4 wt% in FIG.
Can be reasonably explained.

【0020】図3にジルコニアを0.4wt%付着した
青色発光蛍光体のシリカの付着に対する(r/B)相対
値の関係をプロットしたものである。この図より、シリ
カの付着により、さらに(r/B)の相対値は小さくな
り、シリカが0.5wt%で極小となることが分かる。
しかし、これよりシリカが多くなると、(r/B)相対
値は緩やかに増加する。それでも、シリカが2wt%以
下ではシリカを添加しないジルコニア単独のものよりは
(r/B)の相対値は小さい。このシリカとジルコニア
の相互作用により、青色発光蛍光体ストライプ(B)
の、赤色発光蛍光体(r)との親和力がさらに小さくな
っていると推定できる。このシリカとジルコニアの付着
量の最適値は、後で塗布する蛍光体との組み合わせにも
多少影響されるので、微調整する必要はある。
FIG. 3 is a plot of the relative value of (r / B) relative to the silica adhesion of the blue light-emitting phosphor having 0.4% by weight of zirconia adhered thereto. From this figure, it can be understood that the relative value of (r / B) is further reduced by the adhesion of silica, and the silica is minimized at 0.5 wt%.
However, when the amount of silica increases, the (r / B) relative value gradually increases. Nevertheless, when the content of silica is 2 wt% or less, the relative value of (r / B) is smaller than that of zirconia alone containing no silica. Due to the interaction between silica and zirconia, a blue light-emitting phosphor stripe (B)
It can be estimated that the affinity with the red light-emitting phosphor (r) is further reduced. The optimum value of the adhesion amount of silica and zirconia needs to be finely adjusted because it is slightly affected by the combination with the phosphor to be applied later.

【0021】図1〜図3は下地の青色発光蛍光体ストラ
イプ(B)への赤色発光蛍光体(r)の残留による混色
(r/B)を例に説明したが、最初に緑色発光蛍光体ス
トライプ(G)を塗布し、次に青色発光蛍光体(b)を
塗布する場合、下地の緑色発光蛍光体ストライプ(G)
への青色発光蛍光体(b)の残留による混色(b/
G)、最後に塗布される赤色発光蛍光体(r)の緑色発
光蛍光体ストライプ(G)への混色(r/G)も同様
に、ジルコニアおよびシリカの相互作用により減少され
混色は改善される。
FIGS. 1 to 3 show an example of the color mixture (r / B) due to the residual red light-emitting phosphor (r) on the underlying blue light-emitting phosphor stripe (B). When the stripe (G) is applied and then the blue light-emitting phosphor (b) is applied, the green light-emitting phosphor stripe (G) as the base is applied.
Color mixture due to residual blue light-emitting phosphor (b) (b /
G), the color mixture (r / G) of the red light-emitting phosphor (r) applied to the green light-emitting phosphor stripe (G) is similarly reduced by the interaction of zirconia and silica, and the color mixture is improved. .

【0022】[0022]

【実施例】【Example】

[実施例1]青色発光蛍光体(ZnS:Ag)を1kg
を3Lの水に懸濁させ、その中に、 ・ジルコニアゾル(日産化学(株)製NZS-30A;平均粒
径0.062μm;含有量30.7%)
・・・・・・・・・・・・・3.3g ・シリカ(日産化学(株)製スノーテックスZL;平均粒径0.
1μm;含有量52%)・・・・・・・・・・・・・
7.7ml を加え、ZnSO4水溶液(Zn2+として2w/v%)
を30mlを加えて、アンモニア水でpHを7.8に調
整し、分離乾燥し、篩を通し、ジルコニアゾルが0.1
重量%、シリカが0.4重量%付着した本発明の蛍光体
を得た。
Example 1 1 kg of blue light-emitting phosphor (ZnS: Ag)
Is suspended in 3 L of water, and zirconia sol (NZS-30A manufactured by Nissan Chemical Co., Ltd .; average particle size 0.062 μm; content 30.7%)
3.3 g silica (Snowtex ZL manufactured by Nissan Chemical Co., Ltd .;
1 μm; content 52%)
7.7 ml was added, and a ZnSO4 aqueous solution (2 w / v% as Zn2 +) was added.
Was added thereto, the pH was adjusted to 7.8 with aqueous ammonia, separated and dried, and passed through a sieve.
The phosphor of the present invention to which 0.4% by weight of silica adhered was obtained.

【0023】[実施例2]青色発光蛍光体(ZnS:A
g)を1kgを3Lの水に懸濁させ、その中に、 ・ジルコニアゾル(日産化学(株)製NZS-30A;平均粒
径0.062μm;含有量30.7%)・・・・・・・
・・・・・・6.5g ・シリカ(日産化学(株)製スノーテックスZL;平均粒径0.
1μm;含有量52%)・・・・・・・・・・・・・
7.7ml を加え、ZnSO4水溶液(Zn2+として2w/v%)
を30mlを加えて、アンモニア水でpHを7.8に調
整し、分離乾燥し、篩を通し、ジルコニアゾルが0.2
重量%、シリカが0.4重量%付着した本発明の蛍光体
を得た。
Example 2 Blue-emitting phosphor (ZnS: A)
g) is suspended in 3 L of water, and zirconia sol (NZS-30A manufactured by Nissan Chemical Co., Ltd .; average particle size 0.062 μm; content 30.7%)・ ・
6.5 g Silica (Snowtex ZL manufactured by Nissan Chemical Co., Ltd .;
1 μm; content 52%)
7.7 ml was added, and a ZnSO4 aqueous solution (2 w / v% as Zn2 +) was added.
Was added, and the pH was adjusted to 7.8 with aqueous ammonia, separated and dried, and passed through a sieve.
The phosphor of the present invention to which 0.4% by weight of silica adhered was obtained.

【0024】[実施例3]青色発光蛍光体(ZnS:A
g)を1kgを3Lの水に懸濁させ、その中に、 ・ジルコニアゾル(日産化学(株)製NZS-30A;平均粒
径0.062μm;含有量30.7%)・・・・・・・
・・・・・・9.8g ・シリカ(日産化学(株)製スノーテックスZL;平均粒径0.
1μm;含有量52%)・・・・・・・・・・・・1
0.0ml を加え、ZnSO4水溶液(Zn2+として2w/v%)
を30mlを加えて、アンモニア水でpHを7.8に調
整し、分離乾燥し、篩を通し、ジルコニアゾルが0.3
重量%、シリカが0.4重量%付着した本発明の蛍光体
を得た。
Example 3 A blue light-emitting phosphor (ZnS: A
g) is suspended in 3 L of water, and zirconia sol (NZS-30A manufactured by Nissan Chemical Co., Ltd .; average particle size 0.062 μm; content 30.7%)・ ・
9.8 g Silica (Snowtex ZL manufactured by Nissan Chemical Co., Ltd .;
1 μm; content 52%)
0.0 ml, and an aqueous solution of ZnSO4 (2% w / v as Zn2 +)
Was added, and the pH was adjusted to 7.8 with aqueous ammonia, separated and dried, and passed through a sieve.
The phosphor of the present invention to which 0.4% by weight of silica adhered was obtained.

【0025】[実施例4]青色発光蛍光体(ZnS:A
g)1kgを3Lの水に懸濁させ、その中に、 ・ジルコニアゾル(日産化学(株)製NZS-30A;平均粒
径0.062μm;含有量30.7%)・・・・・・・
・・・・・・3.3g を加え、ZnSO4水溶液(Zn2+として2w/v%)
を30mlを加えて、アンモニア水でpHを7.8に調
整し、分離乾燥し、篩を通し、ジルコニアゾルが0.1
重量%付着した本発明の蛍光体を得た。
Example 4 A blue light-emitting phosphor (ZnS: A
g) 1 kg is suspended in 3 L of water, and zirconia sol (NZS-30A manufactured by Nissan Chemical Co., Ltd .; average particle size 0.062 μm; content 30.7%)・
... 3.3 g was added and ZnSO4 aqueous solution (2w / v% as Zn2 +)
Was added thereto, the pH was adjusted to 7.8 with aqueous ammonia, separated and dried, and passed through a sieve.
Thus, the phosphor of the present invention to which the weight% was attached was obtained.

【0026】[実施例5]青色発光蛍光体(ZnS:A
g)を1kgを3Lの水に懸濁させ、その中に、 ・ジルコニアゾル(日産化学(株)製NZS-30A;平均粒
径0.062μm;含有量30.7%)・・・・・・・
・・・・・3.3g ・シリカ(日産化学(株)製スノーテックスZL;平均粒径0.
1μm;含有量52%)・・・・・・・・・・・・7.
7ml を加え、Al2(SO4)3水溶液(Al3+として2w/
v%)を5mlを加えて、アンモニア水でpHを7.8
に調整し、分離乾燥し、篩を通し、ジルコニアゾルが
0.1重量%、シリカが0.4重量%付着した本発明の
蛍光体を得た。
Example 5 A blue light-emitting phosphor (ZnS: A
g) is suspended in 3 L of water, and zirconia sol (NZS-30A manufactured by Nissan Chemical Co., Ltd .; average particle size 0.062 μm; content 30.7%)・ ・
3.3 g Silica (Snowtex ZL manufactured by Nissan Chemical Co., Ltd .;
1 μm; content 52%)
7 ml of an aqueous solution of Al 2 (SO 4) 3 (2 w /
v%) and the pH was adjusted to 7.8 with aqueous ammonia.
, Separated and dried, and passed through a sieve to obtain a phosphor of the present invention to which zirconia sol was attached by 0.1% by weight and silica was attached by 0.4% by weight.

【0027】[実施例6]青色発光蛍光体(ZnS:A
g)を1kgを3Lの水に懸濁させ、その中に、 ・ジルコニアゾル(日産化学(株)製NZS-30A;平均粒
径0.062μm;含有量30.7%)・・・・・・・
・・・・・・3.3g ・シリカ(日産化学(株)製スノーテックスZL;平均粒径0.
1μm;含有量52%)・・・・・・・・・・・・・
7.7ml を加え、アラビアゴム1%水溶液を30ml、ゼラチン
1%水溶液を30ml添加し、酸を加えてpHを3.8
に調整して、分離乾燥し、篩を通し、ジルコニアゾルが
0.1重量%、シリカが0.4重量%付着した本発明の
蛍光体を得た。
Example 6 A blue light-emitting phosphor (ZnS: A
g) is suspended in 3 L of water, and zirconia sol (NZS-30A manufactured by Nissan Chemical Co., Ltd .; average particle size 0.062 μm; content 30.7%)・ ・
3.3 g Silica (Snowtex ZL manufactured by Nissan Chemical Co., Ltd .;
1 μm; content 52%)
Then, 7.7 ml of the mixture was added, 30 ml of a 1% aqueous solution of gum arabic and 30 ml of a 1% aqueous solution of gelatin were added, and an acid was added to adjust the pH to 3.8.
And dried by filtration and passed through a sieve to obtain a phosphor of the present invention having 0.1% by weight of zirconia sol and 0.4% by weight of silica adhered thereto.

【0028】[実施例7]青色発光蛍光体(ZnS:A
g)を1kgを3Lの水に懸濁させ、その中に、 ・ジルコニアゾル(日産化学(株)製NZS-30A;平均粒
径0.062nm;含有量30.7%)・・・・・・・
・・・・・・3.3g ・シリカ(日産化学(株)製スノーテックスZL;平均粒径0.
1μm;含有量52%)・・・・・・・・・・・・・
7.7ml を加え、0.1%アルギン酸ナトリウム水溶液を300
ml、ZnSO4水溶液(Zn2+として2w/v%)を
30ml加えて、ジルコニアゾルが0.1重量%、シリ
カが0.4重量%付着した本発明の蛍光体を得た。
Example 7 A blue light emitting phosphor (ZnS: A
g) is suspended in 3 L of water, and zirconia sol (NZS-30A manufactured by Nissan Chemical Co., Ltd .; average particle size 0.062 nm; content 30.7%)・ ・
3.3 g Silica (Snowtex ZL manufactured by Nissan Chemical Co., Ltd .;
1 μm; content 52%)
7.7 ml, and 0.1% aqueous sodium alginate solution was added to 300 ml.
Then, 30 ml of a ZnSO4 aqueous solution (2 w / v% as Zn2 +) was added to obtain a phosphor of the present invention having 0.1% by weight of zirconia sol and 0.4% by weight of silica.

【0029】[実施例8]青色発光蛍光体(ZnS:A
g)を1kgを3Lの水に懸濁させ、その中に、 ・ジルコニアゾル(日産化学(株)製NZS-30A;平均粒
径0.062nm;含有量30.7%)・・・・・・・
・・・・・・3.3g ・シリカ(日産化学(株)製スノーテックスZL;平均粒径0.
1μm;含有量52%)・・・・・・・・・・・・・
7.7ml を加え、アクリルエマルジョン(アクリル含量45%)
を6.7ml添加して、噴霧乾燥し、篩を通すことで、
ジルコニアゾルが0.1重量%、シリカが0.4重量%
付着した本発明の蛍光体を得た。
Example 8 A blue light-emitting phosphor (ZnS: A
g) is suspended in 3 L of water, and zirconia sol (NZS-30A manufactured by Nissan Chemical Co., Ltd .; average particle size 0.062 nm; content 30.7%)・ ・
3.3 g Silica (Snowtex ZL manufactured by Nissan Chemical Co., Ltd .;
1 μm; content 52%)
Add 7.7ml, acrylic emulsion (acrylic content 45%)
6.7 ml, spray-dried and passed through a sieve,
0.1% by weight of zirconia sol, 0.4% by weight of silica
An attached phosphor of the present invention was obtained.

【0030】[比較例1]青色発光蛍光体(ZnS:A
g)を1kgを3Lの水に懸濁させ、その中に、 ・シリカ(日産化学(株)製スノーテックスZL;平均粒径0.
1μm;含有量52%)・・・・・・・・・・・・・
7.7ml を加え、ZnSO4水溶液(Zn2+として2w/v%)
を30mlを加えて、アンモニア水でpHを7.8に調
整し、分離乾燥し、篩を通し、シリカが0.4重量%付
着した比較例の蛍光体を得た。
Comparative Example 1 A blue light-emitting phosphor (ZnS: A
g) was suspended in 3 L of water, and silica (Snowtex ZL manufactured by Nissan Chemical Co., Ltd .;
1 μm; content 52%)
7.7 ml was added, and a ZnSO4 aqueous solution (2 w / v% as Zn2 +) was added.
Was added thereto, the pH was adjusted to 7.8 with aqueous ammonia, separated and dried, and passed through a sieve to obtain a phosphor of Comparative Example having 0.4% by weight of silica adhered thereto.

【0031】[実施例9]青色発光蛍光体の代わりに、
緑色発光蛍光体(ZnS:Cu,Al)を使用する以外
実施例1と同様にして、ジルコニアゾルが0.1重量
%、シリカが0.4重量%付着した本発明の蛍光体を得
た。
Embodiment 9 Instead of the blue light emitting phosphor,
A phosphor of the present invention having 0.1% by weight of zirconia sol and 0.4% by weight of silica adhered thereto was obtained in the same manner as in Example 1 except that a green light-emitting phosphor (ZnS: Cu, Al) was used.

【0032】[実施例10]青色発光蛍光体の代わり
に、緑色発光蛍光体(ZnS:Cu,Al)を使用する
以外実施例2と同様にして、ジルコニアゾルが0.2重
量%、シリカが0.4重量%付着した本発明の蛍光体を
得た。
Example 10 In the same manner as in Example 2 except that a green light emitting phosphor (ZnS: Cu, Al) was used instead of the blue light emitting phosphor, 0.2% by weight of zirconia sol and silica were used. A phosphor of the present invention having 0.4% by weight attached was obtained.

【0033】[実施例11]青色発光蛍光体の代わり
に、緑色発光蛍光体(ZnS:Cu,Al)を使用する
以外実施例3と同様にして、ジルコニアゾルが0.3重
量%、シリカが0.4重量%付着した本発明の蛍光体を
得た。
Example 11 In the same manner as in Example 3 except that a green light emitting phosphor (ZnS: Cu, Al) was used instead of the blue light emitting phosphor, 0.3% by weight of zirconia sol and silica were used. A phosphor of the present invention having 0.4% by weight attached was obtained.

【0034】[比較例2]青色発光蛍光体の代わりに、
緑色発光蛍光体(ZnS:Cu,Al)を使用する以外
比較例1と同様にして、シリカが0.4重量%付着した
本発明の蛍光体を得た。
Comparative Example 2 Instead of the blue light emitting phosphor,
In the same manner as in Comparative Example 1 except that a green light-emitting phosphor (ZnS: Cu, Al) was used, a phosphor of the present invention having 0.4% by weight of silica adhered was obtained.

【0035】以上のようにして得られた蛍光体100重
量部を用いて、これに純水110重量部と、通常の使用
濃度に調製されたポリビニルアルコール7.5重量部
と、重クロム酸アンモニウム0.4重量部と、界面活性
剤0.7重量部とを混合し、塗布スラリーを調製した。
それぞれの塗布スラリーを塗布し、常法に従い露光、現
像行い、緑色発光蛍光体ストライプ(G)→青色発光蛍
光体ストライプ(B)→赤色発光蛍光体ストライプ
(R)の順に形成し、その時の混色(b/G)、(r/
G)、(r/B)について次のように測定した。
Using 100 parts by weight of the phosphor thus obtained, 110 parts by weight of pure water, 7.5 parts by weight of polyvinyl alcohol adjusted to a usual use concentration, and ammonium bichromate 0.4 parts by weight and 0.7 parts by weight of a surfactant were mixed to prepare a coating slurry.
Each coating slurry is applied, exposed and developed according to a conventional method, and formed in the order of green light-emitting phosphor stripe (G) → blue light-emitting phosphor stripe (B) → red light-emitting phosphor stripe (R), and color mixing at that time. (B / G), (r /
G) and (r / B) were measured as follows.

【0036】例えば、青色発光蛍光体を塗布した後、緑
色発光蛍光体を塗布した場合に、フェースプレート外面
から紫外線を照射して、蛍光面を発光させ、単位面積
(0.2mm×0.2mm)当たりの緑色発光蛍光体ス
トライプ(G)の上に残る青色発光蛍光体(b)の粒子
数を光学顕微鏡で観察して、計数し、10箇所の計数値
の平均を求めた。これをジルコニアおよびシリカを付着
しない基準蛍光体に対する相対比をとり(b/B)の相
対値として表す。同様にして、(r/G)、(r/B)
についても相対値を求めた。結果を表1に示す。
For example, when a blue light-emitting phosphor is applied and then a green light-emitting phosphor is applied, ultraviolet light is irradiated from the outer surface of the face plate to cause the phosphor screen to emit light, and a unit area (0.2 mm × 0.2 mm) is applied. The number of particles of the blue light emitting phosphor (b) remaining on the green light emitting phosphor stripe (G) per) was observed and counted with an optical microscope, and the average of the counted values at 10 places was obtained. This is taken as the relative value of (b / B), taking the relative ratio to the reference phosphor to which zirconia and silica are not attached. Similarly, (r / G), (r / B)
The relative value was also determined for. Table 1 shows the results.

【0037】[0037]

【表1】 [Table 1]

【0038】[0038]

【発明の効果】混色は、(1)下地のストライプあるい
はドットの蛍光体層が、他色蛍光体を残留させやすい傾
向、及び(2)後から塗布する蛍光体が、他色ストライ
プあるいはドットの中に残留しやすい傾向、の二つの要
因に依存する。本発明は、主として(1)に起因する混
色を低減することができた。すなわち、下地に塗布する
蛍光体の粒子表面にジルコニアおよびシリカを付着する
ことで混色を受け難くできた。
As described above, the mixed colors are (1) that the phosphor layer of the underlying stripe or dot tends to cause the phosphor of another color to remain, and (2) that the phosphor to be applied later is formed of the stripe or dot of another color. Depends on two factors: the tendency to remain inside. The present invention was able to reduce the color mixture mainly caused by (1). That is, zirconia and silica were adhered to the particle surface of the phosphor to be applied to the base, so that color mixing was hardly caused.

【0039】ジルコニアの付着量を0.005〜0.5
重量%の範囲にすることにより、混色の大きな原因であ
る、先に形成されたストライプあるいはドットと、後か
ら塗布される蛍光体粒子との親和力を小さくすることが
可能となり、混色が減少した。
When the amount of zirconia adhered is 0.005 to 0.5
By setting the weight% range, the affinity between the previously formed stripes or dots and the phosphor particles to be applied later, which is a major cause of the color mixture, can be reduced, and the color mixture is reduced.

【0040】こさらに、シリカの付着量を0.05〜
2.0重量%の範囲とすることにより、蛍光体塗布面の
凸凹は良好であり、この範囲に限定することにより、立
体障害による、蛍光体の残留により混色も低減すること
ができる。
Further, the amount of silica to be deposited is 0.05 to
By setting the content in the range of 2.0% by weight, the unevenness of the phosphor-coated surface is good. By limiting the content in this range, the color mixture can be reduced due to the residual phosphor due to steric hindrance.

【図面の簡単な説明】[Brief description of the drawings]

【図1】青色発光蛍光体のジルコニア付着量と(r/
B)の関係を示す特性図。
FIG. 1 shows the amount of zirconia deposited on a blue light emitting phosphor and (r /
FIG. 3B is a characteristic diagram illustrating the relationship of FIG.

【図2】青色発光蛍光体のジルコニア付着量と塗布面評
価値の関係を示す特性図。
FIG. 2 is a characteristic diagram showing a relationship between a zirconia adhesion amount of a blue light emitting phosphor and an evaluation value of a coated surface.

【図3】ジルコニアを0.4wt%付着した青色発光蛍
光体のシリカ付着量と(r/B)の関係を示す特性図。
FIG. 3 is a characteristic diagram showing a relationship between a silica adhesion amount of a blue light emitting phosphor having 0.4% by weight of zirconia adhered and (r / B).

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 蛍光体粒子表面に、蛍光体に対して0.
005〜1.0重量%のジルコニアと、蛍光体に対して
0.05〜2.0重量%のシリカが付着されていること
を特徴とする陰極線管用蛍光体。
1. The method according to claim 1, wherein the phosphor particles have a surface area of 0.1 μm to the phosphor.
A phosphor for a cathode ray tube, wherein 005 to 1.0% by weight of zirconia and 0.05 to 2.0% by weight of silica are attached to the phosphor.
【請求項2】 ジルコニアの平均粒子径は0.01〜
0.2μmであることを特徴とする請求項1に記載の陰
極線管用蛍光体。
2. The zirconia has an average particle diameter of 0.01 to 0.01.
The phosphor for a cathode ray tube according to claim 1, wherein the thickness is 0.2 µm.
JP16397896A 1996-06-25 1996-06-25 Phosphors and phosphor slurries for cathode ray tubes Expired - Fee Related JP3491448B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16397896A JP3491448B2 (en) 1996-06-25 1996-06-25 Phosphors and phosphor slurries for cathode ray tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16397896A JP3491448B2 (en) 1996-06-25 1996-06-25 Phosphors and phosphor slurries for cathode ray tubes

Publications (2)

Publication Number Publication Date
JPH108043A true JPH108043A (en) 1998-01-13
JP3491448B2 JP3491448B2 (en) 2004-01-26

Family

ID=15784436

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16397896A Expired - Fee Related JP3491448B2 (en) 1996-06-25 1996-06-25 Phosphors and phosphor slurries for cathode ray tubes

Country Status (1)

Country Link
JP (1) JP3491448B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019026810A1 (en) * 2017-07-31 2019-02-07 クラレノリタケデンタル株式会社 Method for producing powder containing zirconia particles and fluorescent agent

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936182A (en) * 1982-08-23 1984-02-28 Kasei Optonix Co Ltd Fluorescent material
JPH01272688A (en) * 1988-04-26 1989-10-31 Kasei Optonix Co Ltd Light-emitting composition
JPH04214789A (en) * 1990-08-11 1992-08-05 Nichia Chem Ind Ltd Fluorescent material for cathode ray tube and surface treatment
JPH04236294A (en) * 1991-01-14 1992-08-25 Nichia Chem Ind Ltd Treatment of surface of fluorescent substance
JPH07188650A (en) * 1993-12-27 1995-07-25 Toshiba Corp Fluorescencer for cathode ray tube
JPH0892549A (en) * 1994-09-09 1996-04-09 Philips Electron Nv Method of coating luminous powder,luminous powder and article coated

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936182A (en) * 1982-08-23 1984-02-28 Kasei Optonix Co Ltd Fluorescent material
JPH01272688A (en) * 1988-04-26 1989-10-31 Kasei Optonix Co Ltd Light-emitting composition
JPH04214789A (en) * 1990-08-11 1992-08-05 Nichia Chem Ind Ltd Fluorescent material for cathode ray tube and surface treatment
JPH04236294A (en) * 1991-01-14 1992-08-25 Nichia Chem Ind Ltd Treatment of surface of fluorescent substance
JPH07188650A (en) * 1993-12-27 1995-07-25 Toshiba Corp Fluorescencer for cathode ray tube
JPH0892549A (en) * 1994-09-09 1996-04-09 Philips Electron Nv Method of coating luminous powder,luminous powder and article coated

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019026810A1 (en) * 2017-07-31 2019-02-07 クラレノリタケデンタル株式会社 Method for producing powder containing zirconia particles and fluorescent agent
US11802237B2 (en) 2017-07-31 2023-10-31 Kuraray Noritake Dental Inc. Method for producing powder containing zirconia particles and fluorescent agent

Also Published As

Publication number Publication date
JP3491448B2 (en) 2004-01-26

Similar Documents

Publication Publication Date Title
EP0549327B1 (en) Cathode-ray tube phosphor and method of manufacturing the same
JP2862916B2 (en) Phosphor, surface treatment method for phosphor and method for producing phosphor film
JP2637130B2 (en) Method of forming fluorescent screen of color picture tube
JP3491448B2 (en) Phosphors and phosphor slurries for cathode ray tubes
JP2782962B2 (en) Phosphor surface treatment method
JPS63284290A (en) Phosphor for color television
JPH10195429A (en) Fluorescent substance for color television set
KR900004177B1 (en) Fluorescent light surface formation method in cathode ray tube
JPH0559357A (en) Fluorescent substance having surface treated with boron nitride
JP3444609B2 (en) Mixed red phosphor and color CRT
JPH0652807A (en) Color cathode ray tube
JP4619521B2 (en) Surface treatment phosphor for color cathode ray tube and color cathode ray tube element
JPH0815041B2 (en) Phosphor surface treatment method
JPH1077468A (en) Phosphor
JPH10212475A (en) Fluorescent substance and its production
JPS6031060B2 (en) Method for manufacturing color picture tube fluorescent surface
KR930007462B1 (en) Method of making a fluoresent screen of color braun tube
JP2004210869A (en) Surface-treated fluorescent substance and method for producing the same
JP2002042679A (en) Color image screen
JP2000282023A (en) Fluorescent substance for cathode ray tube and cathode ray tube using the same
JPH09268285A (en) Fluorescent substance for cathode ray tube and cathode ray tube
JPH09263755A (en) Phosphor and color cathode ray tube
JP3964578B2 (en) Red light emitting phosphor for cathode ray tube and cathode ray tube
JP3867777B2 (en) Phosphor and phosphor slurry for color cathode ray tube
JPH0662942B2 (en) Fluorescent substance for cathode ray tube

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees