JPH0480283A - Green-emitting phosphor and fluorescent lamp using the same - Google Patents
Green-emitting phosphor and fluorescent lamp using the sameInfo
- Publication number
- JPH0480283A JPH0480283A JP19349790A JP19349790A JPH0480283A JP H0480283 A JPH0480283 A JP H0480283A JP 19349790 A JP19349790 A JP 19349790A JP 19349790 A JP19349790 A JP 19349790A JP H0480283 A JPH0480283 A JP H0480283A
- Authority
- JP
- Japan
- Prior art keywords
- green
- phosphor
- emitting phosphor
- fluorescent lamp
- emitting
- 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 78
- 229920013821 hydroxy alkyl cellulose Polymers 0.000 claims abstract description 12
- 229910052771 Terbium Inorganic materials 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 10
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 claims abstract description 7
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 claims abstract description 7
- 239000001863 hydroxypropyl cellulose Substances 0.000 claims abstract description 6
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 150000001298 alcohols Chemical class 0.000 claims description 2
- 239000002002 slurry Substances 0.000 abstract description 12
- 239000011248 coating agent Substances 0.000 abstract description 9
- 238000000576 coating method Methods 0.000 abstract description 9
- 239000000203 mixture Substances 0.000 abstract description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 15
- 229910019142 PO4 Inorganic materials 0.000 description 14
- 235000021317 phosphate Nutrition 0.000 description 13
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 11
- 239000010452 phosphate Substances 0.000 description 11
- -1 rare earth aluminate Chemical class 0.000 description 10
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 7
- 235000012239 silicon dioxide Nutrition 0.000 description 7
- 239000003086 colorant Substances 0.000 description 6
- 150000002910 rare earth metals Chemical class 0.000 description 6
- 235000010338 boric acid Nutrition 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 229910052684 Cerium Inorganic materials 0.000 description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 4
- 239000004327 boric acid Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 3
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 3
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 3
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 3
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 2
- 229910052702 rhenium Inorganic materials 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000000967 suction filtration Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- JUNWLZAGQLJVLR-UHFFFAOYSA-J calcium diphosphate Chemical compound [Ca+2].[Ca+2].[O-]P([O-])(=O)OP([O-])([O-])=O JUNWLZAGQLJVLR-UHFFFAOYSA-J 0.000 description 1
- 229940043256 calcium pyrophosphate Drugs 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 235000019821 dicalcium diphosphate Nutrition 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000003232 water-soluble binding agent Substances 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）
この発明は、緑色発光蛍光体に係り、特に圧波長域発光
形蛍光ランプ用に好適な緑色発光蛍光体と、これを用い
た蛍光ランプに関する。[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to a green-emitting phosphor, and particularly to a green-emitting phosphor suitable for use in a pressure wavelength range emitting fluorescent lamp, and a green-emitting phosphor using the same. Regarding the fluorescent lamp used.
（従来の技術）
一般照明用の蛍光ランプとして、高効率性と高演色性と
を同時に満足する圧波長域発光形蛍光ランプが急速に普
及しつつあり、家庭用照明光源では主流となっている。(Prior art) Pressure wavelength range fluorescent lamps that simultaneously satisfy high efficiency and high color rendering properties are rapidly becoming popular as fluorescent lamps for general lighting, and have become the mainstream light source for home lighting. .
この種の蛍光ランプには比較的狭帯域の発光スペクトル
分布を有する青色、緑色、赤色発光蛍光体が用いられて
いる。This type of fluorescent lamp uses blue, green, and red emitting phosphors that have a relatively narrow emission spectral distribution.
従来、セリウムとテルビウムとで付活された緑色発光希
土類アルミン酸・珪酸・燐酸塩蛍光体としては、［（Ｒ
ｅ、 Ｔｂ、 Ｃｅ） ２ ０３ ・Ａ１２ ０３Ｓｉ
０２ Ｒ２０ｓｌ （特公昭６０〜９５４３号公
報参照）が知られている。Conventionally, as a green-emitting rare earth aluminate/silicic acid/phosphate phosphor activated with cerium and terbium, [(R
e, Tb, Ce) 2 03 ・A12 03Si
02 R20sl (see Japanese Patent Publication No. 60-9543) is known.
また、希土類珪酸・硼酸・燐酸塩蛍光体としては、［（
Ｒｅ、 Ｔｂ、 Ｃｅ） ２ ０３ ５ｉ０２Ｐ２
０５Ｂ２０３コ （特公昭８２−４４７９２号公報参照
）かあり、このほか希土類正燐酸塩蛍光体としては、［
（Ｒｅ、 Ｔｂ、 Ｃｅ） ＰＯ４］ （特公昭５９
−４３５０８号公報参照）が知られている。In addition, as a rare earth silicic acid/boric acid/phosphate phosphor, [(
Re, Tb, Ce) 2 03 5i02P2
05B203 (see Japanese Patent Publication No. 82-44792), and other rare earth orthophosphate phosphors include [
(Re, Tb, Ce) PO4]
-43508) is known.
そして、水溶性の蛍光体懸濁液（スラリー）を調製する
にあたって、水溶性バインダとしてヒドロキシアルキル
セルロースを用いること（特開昭５９−１２９２８６号
公報参照）が知られている。In preparing a water-soluble phosphor suspension (slurry), it is known to use hydroxyalkyl cellulose as a water-soluble binder (see Japanese Patent Laid-Open No. 129286/1986).
このような圧波長域発光形蛍光ランプでは、その全光束
（発光出力）に対して緑色発光蛍光体の占める割合か非
常に高く、したがって、緑色発光蛍光体の特性が圧波長
域発光形蛍光ランプの性能を大きく左右するのである。In such a pressure wavelength range fluorescent lamp, the proportion of the green light emitting phosphor in the total luminous flux (light emitting output) is very high, and therefore the characteristics of the green light emitting phosphor are It greatly influences the performance of
ところで、圧波長域発光形蛍光ランプの蛍光膜は、青色
、緑色、赤色の各色を混合した蛍光体懸濁液（蛍光体ス
ラリー）によって形成される。したかって各色の蛍光体
の物性がそれぞれスラリーの性質に影響を与えるのであ
るが、たとえば各色の蛍光体の比重を比較すると、青色
発光蛍光体が通常３８〜４．１前後、赤色発光蛍光体が
５，１前後であるのに対して、緑色発光蛍光体は５．３
前後であり、最も大きい。Incidentally, the fluorescent film of a pressure wavelength range fluorescent lamp is formed from a phosphor suspension (phosphor slurry) that is a mixture of blue, green, and red colors. Therefore, the physical properties of each color of phosphor affect the properties of the slurry. For example, when comparing the specific gravity of each color of phosphor, blue-emitting phosphor usually has a specific gravity of around 38 to 4.1, while red-emitting phosphor has a specific gravity of around 38 to 4.1. It is around 5.1, while green-emitting phosphor is around 5.3.
It is the largest before and after.
それ故、蛍光ランプに用いられる ３種類以上の混合蛍
光体の蛍光体スラリーては、緑色発光蛍光体か他の蛍光
体よりも比較的早く沈降、落下しやすく、３色の分布か
不均一となって蛍光膜の品質低下を招くことか問題とな
っている。Therefore, the phosphor slurry of a mixture of three or more types of phosphors used in fluorescent lamps tends to settle and fall relatively quickly compared to green-emitting phosphors or other phosphors, and the distribution of the three colors may be uneven. This has become a problem as it may lead to a deterioration in the quality of the fluorescent film.
（発明が解決しようとする課題）
上述したように、圧波長域発光形蛍光ランプにおいては
、３色混合スラリーの使用に際して、従来の緑色発光蛍
光体である希土類アルミン酸・珪酸・燐酸塩蛍光体や、
希土類珪酸・硼酸・燐酸塩蛍光体、あるいは希土類正燐
酸塩蛍光体の分散性が、他の色よりも悪いという問題が
あった。(Problem to be Solved by the Invention) As mentioned above, when using a three-color mixed slurry in a pressure wavelength range fluorescent lamp, it is difficult to use a rare earth aluminate/silicate/phosphate phosphor, which is a conventional green-emitting phosphor. or,
There has been a problem in that the dispersibility of rare earth silicic acid/boric acid/phosphate phosphors or rare earth orthophosphate phosphors is worse than that of other colors.
このため緑色成分はスラリー中で凝集しゃすく、他の蛍
光体よりも早く沈降して、蛍光面の３色のバランスが崩
れ、蛍光ランプの蛍光膜の品質向上を妨げている。For this reason, the green component aggregates in the slurry and settles faster than other phosphors, disrupting the balance of the three colors on the phosphor screen and hindering the quality improvement of the phosphor film of the fluorescent lamp.
しかも、緑色成分はランプの白色に寄与している割合が
最も大きいため、緑色成分の不安定さはそのまま蛍光ラ
ンプの品質に影響してくる。Furthermore, since the green component has the largest contribution to the white color of the lamp, the instability of the green component directly affects the quality of the fluorescent lamp.
このように、緑色成分の分散、安定性が蛍光膜（蛍光面
）の品位に大きく影響を及ぼすことから、緑色発光蛍光
体の分散性を高め、スラリー中での沈降速度を他の色の
蛍光体と同程度にコントロルすることが課題となってい
る。In this way, the dispersion and stability of the green component greatly affect the quality of the phosphor film (phosphor screen). Therefore, the dispersibility of the green-emitting phosphor is increased, and the sedimentation rate in the slurry is lowered by that of the phosphor of other colors. The challenge is to control it to the same degree as the body.
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
て、スラリー中ての分散性が良く、均一な蛍光面を形成
することのできる緑色発光蛍光体と、この蛍光体を用い
ることによって蛍光膜の品質向上を図った蛍光ランプを
提供することを目的とする。The present invention has been made to solve these problems.The present invention has been made to provide a green-emitting phosphor that has good dispersibility in slurry and can form a uniform phosphor screen, and a green-emitting phosphor that can form a uniform phosphor screen by using this phosphor. The purpose is to provide a fluorescent lamp with improved film quality.
［発明の構成］
（課題を解決するための手段）
この発明の緑色発光蛍光体は、
一般式
％式％
（式中、Ｒ１はＹ ＳＬａ、 Ｇｄの中から選ばれた少
なくとも一種の元素を示し、ａ、ｂおよびｅ、ｆ。[Structure of the Invention] (Means for Solving the Problems) The green light-emitting phosphor of the present invention has the general formula % (wherein R1 represents at least one element selected from YSLa and Gd). , a, b and e, f.
ｇは下記の式を満足する数である。g is a number that satisfies the following formula.
ａ＞０、ｂ＞ＯＳｏ、１≦ａ＋ｂ≦０．７、ｅ≧Ｑ。a>0, b>OSo, 1≦a+b≦0.7, e≧Q.
ｒ≧ｏ、ｇ〉０．０．８≦ｅ＋ｆ＋ｇ ≦１．３０ｏ
）で表されるテルビウムで付活された緑色発光蛍光体、
または、
一般式
％式％
（式中、）７１はＹ 、 Ｌａ、 Ｇｄの中から選ばれ
た少なくとも一種の元素を示し、ａ、ｂおよびｘＳｙ。r≧o, g〉0.0.8≦e+f+g≦1.30o
) is a terbium-activated green-emitting phosphor,
Or, general formula % formula % (in the formula) 71 represents at least one element selected from Y, La, and Gd, a, b, and xSy.
２は下記の式を満足する数である。2 is a number that satisfies the following formula.
ａ＞ＯＳ ｂ＞０ 、 ０．１≦ａ＋ｂ ≦０．
７ 、 Ｘ≧ ０１ｙ＞１．５．ＯＸ １０−’
≦ｚ ≦６．ＯＸ １０づ０．８≦ｘ＋ｙ＋ｚ≦１．３
０． ）
で表されるテルビウムで付活された緑色発光蛍光体の粒
子１００重量％に対して、水に可溶なヒドロキシアルキ
ルセルロースを０．００５重量％以上０．５重量％以下
の範囲で、前記蛍光体の表面に被覆したことを特徴とし
ている。a>OS b>0, 0.1≦a+b≦0.
7, X≧01y>1.5. OX 10-'
≦z ≦6. OX 10 0.8≦x+y+z≦1.3
0. ) Water-soluble hydroxyalkylcellulose is added in an amount of 0.005% to 0.5% by weight based on 100% by weight of the particles of the terbium-activated green light-emitting phosphor represented by It is characterized by coating the surface of the phosphor.
また、本発明の蛍光ランプは、上記緑色発光蛍光体を用
いて形成された蛍光膜を備えたことを特徴としている。Further, the fluorescent lamp of the present invention is characterized in that it includes a fluorescent film formed using the green-emitting phosphor described above.
本発明において、蛍光体の表面を被覆するヒドロキシア
ルキルセルロースは水に可溶なものであり、さらに水と
アルコール類との両方に可溶であることが好ましい。In the present invention, the hydroxyalkyl cellulose that coats the surface of the phosphor is preferably soluble in water, and further soluble in both water and alcohols.
これは蛍光膜の形成工程において、装置などの違いによ
って有機溶媒を使用することもあるため、水とアルコー
ル類との両方に可溶であれば、種々の蛍光膜形成システ
ムへの対応が可能となるからである。特に、ヒドロキシ
プロピルセルロースは扱いが容易で被覆層として適して
いる。This is because organic solvents may be used in the fluorescent film forming process depending on the equipment, so if it is soluble in both water and alcohol, it can be used in a variety of fluorescent film forming systems. Because it will be. In particular, hydroxypropyl cellulose is easy to handle and is suitable as a coating layer.
本発明において、上記（Ｉ）式または（ＩＩ）式で表さ
れる緑色発光蛍光体の表面に被覆するヒドロキシアルキ
ルセルロースの濃度は、蛍光体粒子１００重量％に対し
て０．００５重量％〜０，５重量％とする。In the present invention, the concentration of hydroxyalkylcellulose coated on the surface of the green-emitting phosphor represented by formula (I) or (II) above is 0.005% by weight to 0% by weight based on 100% by weight of the phosphor particles. , 5% by weight.
被覆量が０．００５重量％未満であるとヒドロキシアル
キルセルロースの効果が充分得られず、蛍光体膜（蛍光
面）の品位は改善されない。If the coating amount is less than 0.005% by weight, the effect of hydroxyalkylcellulose will not be sufficiently obtained, and the quality of the phosphor film (phosphor screen) will not be improved.
逆に０，５重量％を超えると緑色発光蛍光体としての発
光出力が著しく低下する。On the other hand, if it exceeds 0.5% by weight, the luminous output as a green-emitting phosphor will be significantly reduced.
この発明の緑色発光蛍光体の母体としては、先に述べた
ように、希土類アルミン酸・珪酸・燐酸塩、希土類珪酸
・燐酸塩、希土類アルミン酸・燐酸塩、または希土類正
燐酸塩や希土類珪酸・硼酸・燐酸塩、このほか希土類硼
酸・燐酸塩などが用いられ、母体の種類によってこの発
明の作用、効果が左右されるものではない。As mentioned above, the matrix of the green light-emitting phosphor of this invention includes rare earth aluminate/silicic acid/phosphate, rare earth silicic acid/phosphate, rare earth aluminic acid/phosphate, rare earth orthophosphate, rare earth silicic acid/phosphate, etc. Boric acid and phosphates, as well as rare earth boric acids and phosphates, are used, and the action and effects of this invention are not influenced by the type of parent material.
（作 用）
この発明の緑色発光蛍光体は、その表面をヒドロキシア
ルキルセルロースで被覆しているため、スラリー中での
分散性が向上し、蛍光体粒子同士の凝集を防ぐとともに
、沈降の速さを抑制することができる。(Function) The surface of the green-emitting phosphor of this invention is coated with hydroxyalkylcellulose, which improves its dispersibility in slurry, prevents agglomeration of phosphor particles, and reduces the rate of sedimentation. can be suppressed.
このため、緑色成分だけが先に沈降して色バランスを崩
すことがなく、均一な蛍光膜が形成される。Therefore, only the green component does not settle first and the color balance is not disturbed, and a uniform fluorescent film is formed.
これによって、発光出力か高く、かつ蛍光膜（蛍光面）
の品位の良好な蛍光ランプを得ることができる。This allows for high light emitting output and fluorescent film (phosphor screen).
It is possible to obtain a fluorescent lamp of good quality.
（実施例） 次に、この発明の実施例について説明する。(Example) Next, embodiments of the invention will be described.
実施例１
純水６００ｃｃにヒドロキシプロピルセルロース（日本
曹達（株）社製、ＲＰＣ、Ｍ、Ｓ、３．１ ）を０．１
２ｇ入れ、充分時間をかけて溶液を撹拌し、完全にＲＰ
Ｃを溶解する。Example 1 Hydroxypropylcellulose (manufactured by Nippon Soda Co., Ltd., RPC, M, S, 3.1) was added at 0.1 ml to 600 cc of pure water.
Add 2g and stir the solution for enough time to completely RP.
Dissolve C.
次に、テルビウムで付活された希土類アルミン酸・珪酸
・燐酸塩緑色発光蛍光体［（Ｌａｏ、ｅｏＣｅｏ、２ｓ
Ｔｂｏ、＋５） ２ ０３ ０．００３ＡＩ２ ０３
０．０００５ＳｉＯ２・１．００３Ｐ２ ０ｓコを
２００ｇ添加し、充分に撹拌する。Next, a rare earth aluminate/silicate/phosphate green-emitting phosphor activated with terbium [(Lao, eoCeo, 2s
Tbo, +5) 2 03 0.003AI2 03
Add 200g of 0.0005SiO2.1.003P20s and stir thoroughly.
その後、ヒドロキシプロピルセルロースと緑色発光蛍光
体とを混合した懸濁液を吸引濾過法により濾過し、濾過
ケーキを１００”０前後の温度で乾燥する。Thereafter, the mixed suspension of hydroxypropyl cellulose and green light-emitting phosphor is filtered by a suction filtration method, and the filter cake is dried at a temperature of about 100"0.
こうして得た蛍光体粒子は、その表面が０．０５重量％
のＨＰＣの被膜により均一に覆われたものである。The surface of the thus obtained phosphor particles was 0.05% by weight.
It is uniformly covered with a HPC film.
続いて、この緑色発光蛍光体１００ ｇを、ニドセルロ
ース溶液にトロセルロース（ＩＩＩｃ） ４重。Subsequently, 100 g of this green-emitting phosphor was added to the nidocellulose solution with 4 layers of trocellulose (IIIc).
％、酢酸ブチル９６ｆｉ １１％） １００ｃｃ 、酢
酸ブチル１ＣＣ，ピロ燐酸カルシウム粉末１ｇを予め調
合し“充分撹拌した溶液中に入れ、蛍光体の懸濁液（１
光体スラリー）を調製する。%, butyl acetate 96fi 11%), 100 cc of butyl acetate, 1 cc of butyl acetate, and 1 g of calcium pyrophosphate powder were prepared in advance and placed in a well-stirred solution.
(photon slurry) is prepared.
この蛍光体スラリーを用い、ＰＬ４０ＳＳ／３７用の２
ラスバルブ内面にスラリーを塗布して蛍光膜を刃成する
。Using this phosphor slurry, 2 for PL40SS/37
A fluorescent film is formed by applying slurry to the inner surface of the glass bulb.
乾燥後、蛍光膜を肉眼で観察し、その膜品位イ評価した
。膜品位の評価にあたっては、凝集部多（ブッ）のない
ものおよび表面が平滑であるもσを１０点とし、凝集部
分の程度および表面の凹凸σ程度に応じて減点し、数値
化した。After drying, the fluorescent film was observed with the naked eye and its film quality was evaluated. In evaluating the film quality, σ was given 10 points even if there were no agglomerated portions (bulges) or the surface was smooth, and points were subtracted according to the degree of agglomerated portions and the degree of surface unevenness σ, and the results were quantified.
さらには、蛍光膜を形成したガラスバルブを耳い、常法
に従って、第１図に示すような蛍光う〉ブＦＬ４０ＳＳ
−Ｇ／３７を作製し、初期発光出力を測定、評価した
。Furthermore, after listening to the glass bulb on which the fluorescent film was formed, a fluorescent film FL40SS as shown in Fig. 1 was prepared using a conventional method.
-G/37 was produced, and the initial luminescence output was measured and evaluated.
第１図において、蛍光ランプは、ガラスバルブ１の内面
に蛍光膜２が被着され、さらに所定圧の放電用ガスか封
入されている。In FIG. 1, the fluorescent lamp has a fluorescent film 2 adhered to the inner surface of a glass bulb 1, and is further filled with a discharge gas at a predetermined pressure.
そして、ガラスバルブ１の両端部に電極３か取付けられ
、この電極３に所定電圧を印加することにより励起源に
よって蛍光膜２が発光するようになっている。Electrodes 3 are attached to both ends of the glass bulb 1, and by applying a predetermined voltage to the electrodes 3, the fluorescent film 2 emits light from the excitation source.
一方、比較品として、同し緑色発光蛍光体（テルビウム
で付活された希土類アルミン酸・珪酸・燐酸塩緑色発光
蛍光体〕をヒドロキシプロピルセルロースの被覆なしで
使用し、同様の蛍光ランプを作製し、実施例と同一条件
で特性を測定した。On the other hand, as a comparative product, a similar fluorescent lamp was fabricated using the same green-emitting phosphor (a rare earth aluminate/silicate/phosphate green-emitting phosphor activated with terbium) without the hydroxypropyl cellulose coating. The characteristics were measured under the same conditions as in the examples.
その結果、従来の蛍光体の膜品位は７，０であるのに対
して、この実施例の蛍光体は９．５であった。As a result, the film quality of the conventional phosphor was 7.0, whereas the film quality of the phosphor of this example was 9.5.
また、初期発光出力は、従来の蛍光体の初期発光出力を
１００％とした時の相対値で示しており、この実施例の
蛍光ランプは９９．５％と、大きな差は認められなかっ
た。Further, the initial light emission output is expressed as a relative value when the initial light emission output of a conventional phosphor is taken as 100%, and the fluorescent lamp of this example had a value of 99.5%, and no significant difference was observed.
これらの結果を第１表にまとめて示す。These results are summarized in Table 1.
実施例２
純水８００ｃｃにヒドロキシプロピル・メチルセルロー
ス（信越化学工業（株）社製、メトローズ６０ＳＲ）を
０．４８ｇ入れ、充分時間をがけて溶液を撹拌し、完全
にヒドロキシプロピル・メチルセルロースを溶解する。Example 2 Add 0.48 g of hydroxypropyl methylcellulose (Metrose 60SR, manufactured by Shin-Etsu Chemical Co., Ltd.) to 800 cc of pure water, and stir the solution for a sufficient amount of time to completely dissolve the hydroxypropyl methylcellulose.
次に、テルビウムで付活された希土類珪酸・硼酸・燐酸
塩緑色発光蛍光体［（ＬａＯ，４０ｃｅＯ，４５ＴｂＯ
，１５２０３−０，００１８＋０２・０．９８８Ｐ２０
５ ０．０００５８２０３］を２００ ｇ添加し、充
分に撹拌する。Next, a rare earth silicic acid/boric acid/phosphate green-emitting phosphor activated with terbium [(LaO, 40ceO, 45TbO
,15203-0,0018+02・0.988P20
50.00058203] and stir thoroughly.
その後、これらを混合した懸濁液を吸引濾過法により濾
過し、濾過ケーキを１００”Ｃ前後の温度で乾燥する。Thereafter, a suspension obtained by mixing these is filtered by a suction filtration method, and the filter cake is dried at a temperature of about 100''C.
このようにして得られた蛍光体粒子は、その表面が（１
，２ｆ）重量％のヒドロキシプロピル・メチルセルロー
スの被膜により均一に覆われている。The phosphor particles obtained in this way have a surface of (1
, 2f) uniformly coated with a coating of hydroxypropyl methylcellulose of % by weight.
この緑色発光蛍光体を用いて実施例１と同様に蛍光ラン
プを作製し、同一条件で特性を測定、評価した。A fluorescent lamp was produced using this green-emitting phosphor in the same manner as in Example 1, and its characteristics were measured and evaluated under the same conditions.
これらの結果を第１表に示す。These results are shown in Table 1.
実施例３〜１２
第１表に示すように、緑色発光蛍光体とこの表面を被覆
するヒドロキシアルキルセルロースの被覆濃度を変化さ
せ、実施例〕と同様に緑色発光蛍光体を調製した。Examples 3 to 12 As shown in Table 1, green-emitting phosphors were prepared in the same manner as in Example, except that the coating concentrations of the green-emitting phosphor and the hydroxyalkyl cellulose coating the surface of the green-emitting phosphor were varied.
また、得られた緑色発光蛍光体を用いて蛍光ランプを作
製し、特性評価を行った。Furthermore, a fluorescent lamp was manufactured using the obtained green-emitting phosphor, and its characteristics were evaluated.
これらの結果をまとめて第１表に示す。These results are summarized in Table 1.
（以下余白）
これらの結果から明らかなように、この実施例による緑
色発光蛍光体を用いた蛍光ランプは初期発光出力を従来
のものとほぼ同等に維持しつつ、かつ蛍光膜の膜品位が
著しく向上しており、大幅な品質向上を図ることができ
た。(Left below) As is clear from these results, the fluorescent lamp using the green-emitting phosphor according to this example maintains the initial light output almost the same as the conventional one, and the film quality of the phosphor film is significantly improved. We were able to achieve a significant improvement in quality.
［発明の効果］
以上説明したように、この発明によれば、高輝度、高分
散性の緑色発光蛍光体が得られ、３色のバランスの良い
均一な蛍光膜を形成することができる。したがって、蛍
光ランプ用の緑色発光蛍光体として極めて有用であり、
蛍光ランプの品質向上に大きく貢献するものである。[Effects of the Invention] As described above, according to the present invention, a green light-emitting phosphor with high brightness and high dispersion can be obtained, and a uniform phosphor film with good balance of three colors can be formed. Therefore, it is extremely useful as a green-emitting phosphor for fluorescent lamps.
This will greatly contribute to improving the quality of fluorescent lamps.
第１図はこの発明の一実施例の蛍光ランプを一部破断し
て示す図である。
１・・・ガラスバルブ、２・・・蛍光膜、３・・・電極
。
出願人 株式会社 東芝
同 東芝電子デバイス
エンジニアリング株式会社FIG. 1 is a partially cutaway view of a fluorescent lamp according to an embodiment of the present invention. 1... Glass bulb, 2... Fluorescent film, 3... Electrode. Applicant Toshiba Corporation Toshiba Electronic Device Engineering Corporation
Claims (4)
Ｏ＿３・ｅＡｌ＿２Ｏ＿３・ｆＳｉＯ＿２・ｇＰ＿２Ｏ
＿５……（ I ）（式中、Ｒ＾１はＹ、Ｌａ、Ｇｄの中
から選ばれた少なくとも一種の元素を示し、ａ、ｂおよ
びｅ、ｆ、ｇは下記の式を満足する数である。 ａ＞０、ｂ＞０、０．１≦ａ＋ｂ≦０．７、ｅ≧０、ｆ
≧０、ｇ＞０、０．８≦ｅ＋ｆ＋ｇ≦１．３０。）で表
されるテルビウムで付活された緑色発光蛍光体、または
、 一般式 （Ｒ＾１＿１＿−＿ａ＿−＿ｂＴｂ＿ａＣｅ＿ｂ）＿２
Ｏ＿３・ｘＳｉＯ＿２・ｙＰ＿２Ｏ＿５・ｚＢ＿２Ｏ＿
３……（II）（式中、Ｒ＾１はＹ、Ｌａ、Ｇｄの中から
選ばれた少なくとも一種の元素を示し、ａ、ｂおよびｘ
、ｙ、ｚは下記の式を満足する数である。 ａ＞０、ｂ＞０、０．１≦ａ＋ｂ≦０．７、ｘ≧０、ｙ
＞０、５．０×１０＾−＾６≦ｚ≦６．０×１０＾−＾
３、０．８≦ｘ＋ｙ＋ｚ≦１．３０。） で表されるテルビウムで付活された緑色発光蛍光体の粒
子１００重量％に対して、 水に可溶なヒドロキシアルキルセルロースを、０．００
５重量％以上０．５重量％以下の範囲で、前記蛍光体の
表面に被覆したことを特徴とする緑色発光蛍光体。(1) General formula (R^1_1_-_a_-_bTb_aCe_b)_2
O_3・eAl_2O_3・fSiO_2・gP_2O
_5...(I) (In the formula, R^1 represents at least one element selected from Y, La, and Gd, and a, b, e, f, and g are numbers that satisfy the following formula. Yes. a>0, b>0, 0.1≦a+b≦0.7, e≧0, f
≧0, g>0, 0.8≦e+f+g≦1.30. ) or the general formula (R^1_1_-_a_-_bTb_aCe_b)_2
O_3・xSiO_2・yP_2O_5・zB_2O_
3...(II) (In the formula, R^1 represents at least one element selected from Y, La, and Gd, and a, b, and x
, y, and z are numbers that satisfy the following formula. a>0, b>0, 0.1≦a+b≦0.7, x≧0, y
>0, 5.0×10^-^6≦z≦6.0×10^-^
3, 0.8≦x+y+z≦1.30. ) Water-soluble hydroxyalkylcellulose was added to 100% by weight of the green-emitting phosphor particles activated with terbium.
A green light-emitting phosphor, characterized in that the surface of the phosphor is coated with an amount of 5% by weight or more and 0.5% by weight or less.
ール類との両方に可溶である請求項１記載の緑色発光蛍
光体。(2) The green light-emitting phosphor according to claim 1, wherein the hydroxyalkyl cellulose is soluble in both water and alcohols.
プロピルセルロースである請求項１記載の緑色発光蛍光
体。(3) The green-emitting phosphor according to claim 1, wherein the hydroxyalkyl cellulose is hydroxypropyl cellulose.
形成された蛍光膜を備えたことを特徴とする蛍光ランプ
。(4) A fluorescent lamp comprising a fluorescent film formed using the green-emitting phosphor according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2193497A JPH0733510B2 (en) | 1990-07-19 | 1990-07-19 | Green phosphor for three-wavelength emission type fluorescent lamp and three-wavelength emission type fluorescent lamp using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2193497A JPH0733510B2 (en) | 1990-07-19 | 1990-07-19 | Green phosphor for three-wavelength emission type fluorescent lamp and three-wavelength emission type fluorescent lamp using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0480283A true JPH0480283A (en) | 1992-03-13 |
| JPH0733510B2 JPH0733510B2 (en) | 1995-04-12 |
Family
ID=16309031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2193497A Expired - Lifetime JPH0733510B2 (en) | 1990-07-19 | 1990-07-19 | Green phosphor for three-wavelength emission type fluorescent lamp and three-wavelength emission type fluorescent lamp using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0733510B2 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5581447A (en) * | 1978-12-15 | 1980-06-19 | Toshiba Corp | Fluorescent material with pigment and its manufacturing method |
| JPS6047583A (en) * | 1983-08-26 | 1985-03-14 | Toshiba Corp | Color projection type video device |
| JPS621777A (en) * | 1985-06-27 | 1987-01-07 | Toshiba Corp | Fluorescent material |
| JPS63135480A (en) * | 1986-11-28 | 1988-06-07 | Toshiba Corp | Method of treating pigmented phosphor |
| JPH01234490A (en) * | 1988-03-16 | 1989-09-19 | Toshiba Corp | Fluorescent substance and fluorescent lamp |
| JPH02173087A (en) * | 1988-12-26 | 1990-07-04 | Toshiba Corp | Phosphor and fluorescent lamp |
-
1990
- 1990-07-19 JP JP2193497A patent/JPH0733510B2/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5581447A (en) * | 1978-12-15 | 1980-06-19 | Toshiba Corp | Fluorescent material with pigment and its manufacturing method |
| JPS6047583A (en) * | 1983-08-26 | 1985-03-14 | Toshiba Corp | Color projection type video device |
| JPS621777A (en) * | 1985-06-27 | 1987-01-07 | Toshiba Corp | Fluorescent material |
| JPS63135480A (en) * | 1986-11-28 | 1988-06-07 | Toshiba Corp | Method of treating pigmented phosphor |
| JPH01234490A (en) * | 1988-03-16 | 1989-09-19 | Toshiba Corp | Fluorescent substance and fluorescent lamp |
| JPH02173087A (en) * | 1988-12-26 | 1990-07-04 | Toshiba Corp | Phosphor and fluorescent lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0733510B2 (en) | 1995-04-12 |
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