JPS6118954B2 - - Google Patents
Info
- Publication number
- JPS6118954B2 JPS6118954B2 JP6744781A JP6744781A JPS6118954B2 JP S6118954 B2 JPS6118954 B2 JP S6118954B2 JP 6744781 A JP6744781 A JP 6744781A JP 6744781 A JP6744781 A JP 6744781A JP S6118954 B2 JPS6118954 B2 JP S6118954B2
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- red
- color rendering
- fluorescent
- fluorescent lamp
- 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.)
- Expired
Links
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 20
- 229910052693 Europium Inorganic materials 0.000 claims description 4
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 claims description 4
- 239000012190 activator Substances 0.000 claims description 3
- 229910052727 yttrium Inorganic materials 0.000 claims description 3
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 3
- 238000006467 substitution reaction Methods 0.000 claims 1
- 238000009877 rendering Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 5
- 239000003086 colorant Substances 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000000295 emission spectrum Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910005191 Ga 2 O 3 Inorganic materials 0.000 description 1
- 229910020068 MgAl Inorganic materials 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- LRJTZKMYODMAIS-UHFFFAOYSA-N [O-2].P.[Y+3].[Eu+3] Chemical compound [O-2].P.[Y+3].[Eu+3] LRJTZKMYODMAIS-UHFFFAOYSA-N 0.000 description 1
- KDLMLCMTDSRXIX-UHFFFAOYSA-N [Y].[P].[Eu] Chemical compound [Y].[P].[Eu] KDLMLCMTDSRXIX-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 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
- 238000010586 diagram Methods 0.000 description 1
- 235000019821 dicalcium diphosphate Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Description
この発明は、電子線、紫外線等の照射を受ける
と赤色発光する新規な螢光体に関する。
近時、各種の分野で省エネルギー化が重要な課
題となつている。これを照明用螢光ランプについ
てみると、省エネルギー化のためには、螢光体の
高効率化が要求されるということになる。
このような観点から螢光体発光を考える場合に
おいて、特につぎの二つの点に留意する必要があ
る。すなわち、人間の眼はその明るさに対する感
度が、緑系をもつとも明るく感じ赤系や青系を暗
く感じるというように、発光色によつて異なる。
そこで、第一に、人間の感覚でみた明るさの感
じ、すなわち視感度の点で満足されることであ
る。第二に、照らされた物体の色が自然な状態に
再現できていること、すなわち演色性のよいこと
である。
ところで、高演色化と高効率化とは一般に両立
し難いものであつて、高演色化を図るためには、
視感度の悪い赤成分を多く必要とするのが普通で
ある。このため、公知の緑色螢光体や青色螢光体
と組み合わせて使用する場合に、高効率、高演色
性を示すような赤色発光の新規な螢光体の出現が
強く要望されていた。すなわち、赤色発光螢光体
として知られているイツトリウム−ユーロピウム
酸化物螢光体は、演色性にすぐれてはいるが、そ
の発光領域が600nm以上にあるため視感度の点か
らは不利であつたからである。
このイツトリウム−ユーロピウム螢光体の例に
鑑みれば、これよりもやや短波長領域で発光する
螢光体であれば、視感度および演色性の両者を満
足させることができることが分かる。
そこで、この発明者は、このような目的のもと
に、種々の検討を施した結果、ついに新しい赤色
発光螢光体を提供することに成功した。
すなわち、この発明にかかる螢光体は、組成式
3Ga2O3・2In2O3・3Y2O3:Eu3+
であらわされ、3価のユーロピウムEu3+が付活
剤としてイツトリウムYの一部と置換しているこ
とを特徴としている。
この螢光体は、紫外線、電子線等による励起下
で、図に示すように、595nm付近に主発光ピーク
を有し、さらに610nm付近にも発光ピークを有す
る。したがつて、演色性がよく、しかも視感度の
点でも有利である。
なお、付活剤としての3価のユーロピウム
Eu3+は、3価として計算して、イツトリウムY
に対し1〜15原子%だけその一部と置換している
ことが、実施上好ましい。
この螢光体は、たとえば、原料としての
Y2O3,In2O3,Ga2O3およびEu2O3を選び、これ
らを所定量ずつ配合して充分に乾式混合したもの
を、焼成炉中、酸化雰囲気下、好ましくは空気雰
囲気下、1300〜1550℃の温度で、2〜20時間程度
焼成することによつて、合成される。
この発明にかかる螢光体は、単独で赤色発光の
螢光体として用いられるほか、他の螢光体と配合
しても用いられる。
つぎに、実施例について従来例と併せて述べ
る。
この発明にかかる赤色螢光体を用いて螢光ラン
プを製作し、その発光特性を従来の螢光ランプと
比較した。実施例で使用した螢光体は、次の3成
分混合系である。
青成分 Sr10(PO4)6Cl2:Eu2+
緑成分 (Ce,Tb)MgAl11O19
赤成分 3Ga2O3・2In2O3・3Y2O3:Eu3+
上記螢光体の混合物を、酢酸ブチルをニトロセ
ルロースで増粘したものの中に分散させ、螢光ラ
ンプ用バルブに塗布した。この場合、結着効果を
増すため、ピロリン酸カルシウム等の結着剤を添
加しておいてもよい。なお、各螢光体の混合比
は、これら各螢光体の発光スペクトル強度比であ
らわして、第1表の通りとした。ここに、発光ス
ペクトル強度比とは、混合組成物に付与される
UV量と同一量のUV量が、各螢光体単一物に付与
された場合の各螢光スペクトル強度を1としたと
きの、混合組成物中の各螢光スペクトル強度の比
をあらわす。
The present invention relates to a novel phosphor that emits red light when irradiated with electron beams, ultraviolet rays, etc. Recently, energy saving has become an important issue in various fields. Looking at this with regard to fluorescent lamps for illumination, it follows that in order to save energy, the efficiency of the fluorescent body must be increased. When considering fluorescent light emission from this perspective, it is necessary to pay special attention to the following two points. That is, the human eye's sensitivity to brightness differs depending on the color of the emitted light, such that greenish colors feel bright and reddish and blueish colors seem dark.
Therefore, the first thing to do is to be satisfied with the sense of brightness as seen by human senses, that is, with respect to visibility. Second, the color of the illuminated object can be reproduced in a natural state, that is, it has good color rendering properties. By the way, high color rendering and high efficiency are generally difficult to coexist, and in order to achieve high color rendering,
Usually, a large amount of red component, which has poor visibility, is required. Therefore, there has been a strong demand for a new phosphor that emits red light and exhibits high efficiency and high color rendering when used in combination with known green and blue phosphors. In other words, the yttrium-europium oxide phosphor, which is known as a red-emitting phosphor, has excellent color rendering properties, but its emission range is over 600 nm, which is disadvantageous in terms of visibility. It is. Considering this example of the yttrium-europium phosphor, it can be seen that a phosphor that emits light in a slightly shorter wavelength region can satisfy both visibility and color rendering properties. Therefore, as a result of various studies based on this objective, the inventor finally succeeded in providing a new red-emitting phosphor. That is, the phosphor according to the present invention is represented by the composition formula 3Ga 2 O 3.2In 2 O 3.3Y 2 O 3 :Eu 3+ , and trivalent europium Eu 3+ is used as an activator for yttrium Y. It is characterized by replacing some parts. When excited by ultraviolet rays, electron beams, etc., this phosphor has a main emission peak around 595 nm, and also has an emission peak around 610 nm, as shown in the figure. Therefore, it has good color rendering properties and is also advantageous in terms of visibility. In addition, trivalent europium as an activator
Eu 3+ is calculated as trivalent and is equivalent to yttrium Y.
Practically speaking, it is preferable to substitute 1 to 15 atomic % with respect to that part. This phosphor can be used, for example, as a raw material.
Y 2 O 3 , In 2 O 3 , Ga 2 O 3 and Eu 2 O 3 are selected, and a predetermined amount of these are blended and thoroughly dry mixed in a firing furnace under an oxidizing atmosphere, preferably an air atmosphere. It is synthesized by baking at a temperature of 1,300 to 1,550°C for about 2 to 20 hours. The phosphor according to the present invention may be used alone as a red-emitting phosphor, or may be used in combination with other phosphors. Next, an example will be described together with a conventional example. A fluorescent lamp was manufactured using the red phosphor according to the present invention, and its light emitting characteristics were compared with those of a conventional fluorescent lamp. The phosphor used in the examples is a three-component mixture system as shown below. Blue component Sr 10 (PO 4 ) 6 Cl 2 : Eu 2+ Green component (Ce, Tb) MgAl 11 O 19 Red component 3Ga 2 O 3・2In 2 O 3・3Y 2 O 3 : Eu 3+ Above phosphor The mixture was dispersed in butyl acetate thickened with nitrocellulose and applied to a fluorescent lamp bulb. In this case, a binder such as calcium pyrophosphate may be added to increase the binding effect. The mixing ratio of each phosphor was expressed as the emission spectrum intensity ratio of each phosphor, as shown in Table 1. Here, the emission spectrum intensity ratio is given to the mixed composition.
It represents the ratio of the intensity of each fluorescent spectrum in the mixed composition, where the intensity of each fluorescent spectrum is set to 1 when the same amount of UV is applied to each single phosphor.
【表】
従来例についても同様にして、螢光ランプ用バ
ルブに塗布した。なお、従来例は螢光体としてハ
ロリン酸カルシウム:Mn2+,Sb3+を選んだ。
以上のようにして、40W,32mmφ,Ar封入、
2.5Torrの螢光ランプを製作し、その発光特性を
調べた。その結果は第2表に示す通りであり、実
施例は従来例に比べすぐれていることが分かる。
なお、螢光ランプは、4200〓、白色(色度点x=
0.37,y=0.38)のもので検討した。[Table] The conventional example was also applied to a fluorescent lamp bulb in the same manner. In the conventional example, calcium halophosphate: Mn 2+ , Sb 3+ was selected as the phosphor. As above, 40W, 32mmφ, Ar filled,
We manufactured a 2.5Torr fluorescent lamp and investigated its emission characteristics. The results are shown in Table 2, and it can be seen that the example is superior to the conventional example.
In addition, the fluorescent lamp is 4200〓, white (chromaticity point x =
0.37, y=0.38).
図面はこの発明にかかる螢光体のスペクトルエ
ネルギー分布を示す特性図である。
The drawing is a characteristic diagram showing the spectral energy distribution of the phosphor according to the present invention.
Claims (1)
剤としてイツトリウムYの一部と置換しているこ
とを特徴とする螢光体。 2 3価のユーロピウムの置換量が1〜15原子%
である特許請求の範囲第1項記載の螢光体。[Claims] 1. Compositional formula 3Ga 2 O 3・21n 2 O 3・3Y 2 O 3 : Represented by Eu 3+ , where trivalent europium Eu 3+ replaces a part of yttrium Y as an activator. A phosphor that is characterized by 2 Substitution amount of trivalent europium is 1 to 15 at%
A phosphor according to claim 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6744781A JPS57180687A (en) | 1981-04-30 | 1981-04-30 | Phosphor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6744781A JPS57180687A (en) | 1981-04-30 | 1981-04-30 | Phosphor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57180687A JPS57180687A (en) | 1982-11-06 |
JPS6118954B2 true JPS6118954B2 (en) | 1986-05-15 |
Family
ID=13345182
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6744781A Granted JPS57180687A (en) | 1981-04-30 | 1981-04-30 | Phosphor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57180687A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01124610U (en) * | 1988-01-27 | 1989-08-24 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6761837B2 (en) * | 2002-06-12 | 2004-07-13 | General Electric Company | Europium-activated phosphors containing oxides of rare-earth and group-IIIB metals and method of making the same |
US7022263B2 (en) | 2002-06-12 | 2006-04-04 | General Electric Company | Europium-activated phosphors containing oxides of rare-earth and group-IIIB metals and method of making the same |
-
1981
- 1981-04-30 JP JP6744781A patent/JPS57180687A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01124610U (en) * | 1988-01-27 | 1989-08-24 |
Also Published As
Publication number | Publication date |
---|---|
JPS57180687A (en) | 1982-11-06 |
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