JPH01255149A - Metal vapor discharge lamp - Google Patents
Metal vapor discharge lampInfo
- Publication number
- JPH01255149A JPH01255149A JP8381588A JP8381588A JPH01255149A JP H01255149 A JPH01255149 A JP H01255149A JP 8381588 A JP8381588 A JP 8381588A JP 8381588 A JP8381588 A JP 8381588A JP H01255149 A JPH01255149 A JP H01255149A
- Authority
- JP
- Japan
- Prior art keywords
- sealing material
- lamp
- halide
- weight
- scandium
- 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.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 title claims description 5
- 239000002184 metal Substances 0.000 title claims description 5
- 239000003566 sealing material Substances 0.000 claims abstract description 25
- 229910052706 scandium Inorganic materials 0.000 claims abstract description 17
- -1 scandium halide Chemical class 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 5
- 229910001507 metal halide Inorganic materials 0.000 abstract description 22
- 150000005309 metal halides Chemical class 0.000 abstract description 22
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 19
- 229910001404 rare earth metal oxide Inorganic materials 0.000 abstract description 13
- 239000000203 mixture Substances 0.000 abstract description 8
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 8
- 239000000377 silicon dioxide Substances 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 8
- ZIKATJAYWZUJPY-UHFFFAOYSA-N thulium (III) oxide Inorganic materials [O-2].[O-2].[O-2].[Tm+3].[Tm+3] ZIKATJAYWZUJPY-UHFFFAOYSA-N 0.000 abstract description 8
- FIXNOXLJNSSSLJ-UHFFFAOYSA-N ytterbium(III) oxide Inorganic materials O=[Yb]O[Yb]=O FIXNOXLJNSSSLJ-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052681 coesite Inorganic materials 0.000 abstract description 5
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 5
- HYXGAEYDKFCVMU-UHFFFAOYSA-N scandium(III) oxide Inorganic materials O=[Sc]O[Sc]=O HYXGAEYDKFCVMU-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052682 stishovite Inorganic materials 0.000 abstract description 5
- 229910052905 tridymite Inorganic materials 0.000 abstract description 5
- VQCBHWLJZDBHOS-UHFFFAOYSA-N erbium(III) oxide Inorganic materials O=[Er]O[Er]=O VQCBHWLJZDBHOS-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052593 corundum Inorganic materials 0.000 abstract description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 239000011195 cermet Substances 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910018094 ScI3 Inorganic materials 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000012945 sealing adhesive Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Landscapes
- Discharge Lamp (AREA)
- Vessels And Coating Films For Discharge Lamps (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、メタルハライドランプなどのように、閉塞部
材により端部を封着材で閉止してなる金属蒸気放電灯に
おいて、その封着接着剤の改善に関する。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a metal vapor discharge lamp whose end portion is closed with a sealing material by a closing member, such as a metal halide lamp. This invention relates to improvements in the sealing adhesive.
(従来の技術)
例えば、従来のメタルハライドランプは、石英ガラス製
の発光管内に金属ハロゲン化物、水銀および希ガスを封
入し、この発光管を例えば窒素ガスを充填した外管内に
収容して2重管構造をなしていた。(Prior art) For example, in a conventional metal halide lamp, a metal halide, mercury, and a rare gas are sealed in an arc tube made of quartz glass, and this arc tube is housed in an outer bulb filled with nitrogen gas, for example, to double-layer the lamp. It had a tubular structure.
しかしながら近年、石英ガラスよりも耐熱性に優れた透
光性アルミナ管を発光管バルブとして使用する試みが進
められている。However, in recent years, attempts have been made to use translucent alumina tubes, which have better heat resistance than quartz glass, as arc tube bulbs.
発光管バルブに透光性アルミナ管を使用すると、封入し
た金属ハロゲン化物の蒸気圧を決めるのに寄与する発光
管の最冷部温度が、石英ガラスの場合700℃前後であ
ったのに対し、耐熱性に優れた透光性アルミナの場合は
800℃以上にも高くすることができ、金属ハロゲン化
物の蒸気圧を高めることができるので、発光効率などの
ランプ特性を向上させることができる。When a translucent alumina tube is used for the arc tube bulb, the temperature at the coldest part of the arc tube, which contributes to determining the vapor pressure of the enclosed metal halide, is around 700°C in the case of quartz glass. In the case of translucent alumina, which has excellent heat resistance, the temperature can be raised to 800° C. or higher, and the vapor pressure of the metal halide can be increased, so lamp characteristics such as luminous efficiency can be improved.
例えば、金属ハロゲン化物としてハロゲン化スカンジウ
ムを主成分とし、ハロゲン化ナトリウム、ハロゲン化タ
リウムを組合わせて発光物質として使用した場合、15
0Wでは発光効率105g+l/W以上、平均演色評価
数(Ra)70以上の特性が得られることが確認されて
いる。For example, if scandium halide is the main component of the metal halide, and sodium halide and thallium halide are used as a light emitting substance, 15
It has been confirmed that at 0 W, characteristics such as a luminous efficiency of 105 g+l/W or more and an average color rendering index (Ra) of 70 or more can be obtained.
ところで、発光管バルブとして透光性アルミナを使用し
た場合の従来の発光管構造を第1図に示す。Incidentally, FIG. 1 shows a conventional arc tube structure in which translucent alumina is used as the arc tube bulb.
図において1は透光性アルミナよりなる発光管バルブで
あり、この発光管バルブlの両端は、溶融した封着材2
,2を介してタングステンとアルミナとの混合体である
サーメットからなる端部閉塞部材3,3により気密に封
止されている。この端部閉塞部材3,3は内部に電極4
,4を支持しているととも辷、外部に外部導線5,5を
突出して備えている。そして、発光管バルブ1内には、
発光物質として金属ハロゲン化物と、水銀と、希ガスが
封入されている。In the figure, 1 is an arc tube bulb made of translucent alumina, and both ends of this arc tube bulb 1 are covered with a molten sealing material 2.
, 2, and are hermetically sealed by end closing members 3, 3 made of cermet, which is a mixture of tungsten and alumina. These end closing members 3, 3 have electrodes 4 inside.
, 4, and has external conductor wires 5, 5 protruding from the outside. And inside the arc tube bulb 1,
Metal halide, mercury, and rare gas are sealed as luminescent substances.
ところで、一般に金属ハロゲン化物は光効率に優れてい
る反面、高温で化学反応性が極めて強い性質があり、こ
のことが発光管を構成する各部材の選択に大きな影響を
及ぼすものである。Incidentally, although metal halides generally have excellent light efficiency, they also have extremely strong chemical reactivity at high temperatures, and this has a great influence on the selection of each member constituting the arc tube.
すなわち、発光管バルブ1は金属ハロゲン化物に対して
反応耐性を有する材料である透光性アルミナを使用して
いるとともに、端部閉塞部材3゜3も金属ハロゲン化物
に対する反応耐性を持つサーーメットが用いられている
。That is, the arc tube bulb 1 is made of translucent alumina, which is a material that is resistant to reactions with metal halides, and the end closing member 3゜3 is also made of cermet, which is resistant to reactions with metal halides. It is being
(発明が解決しようとする課題)
しかしながら、問題とされるのは、上記のような端部閉
寒部材3,3を発光管バルブ1の両端に気密に接合する
封着材2,2である。(Problem to be Solved by the Invention) However, the problem is the sealing materials 2, 2 that airtightly join the end cooling members 3, 3 as described above to both ends of the arc tube bulb 1. .
すなわち、従来において、封着材2.2は次のような特
性を満足すればよいと考えられていた。That is, conventionally, it was thought that the sealing material 2.2 should satisfy the following characteristics.
(1)透光性アルミナよりなる発光管バルブlおよびサ
ーメットよりなる端部閉塞部材3,3に対する濡れ性が
よいこと。(1) Good wettability with respect to the arc tube bulb l made of translucent alumina and the end closing members 3 made of cermet.
(2)ランプ点灯時の高温(封着部分は点灯特約100
0℃の高温に達する)に耐えること。(2) High temperature when lighting the lamp (sealed part has a special lighting rating of 100
To withstand high temperatures (reaching temperatures as high as 0°C).
(3)熱膨張係数がアルミナおよびサーメットと近似し
ていること(アルミナの熱膨張係数は7.2xlO−6
/”C程度である)。(3) The coefficient of thermal expansion is similar to that of alumina and cermet (the coefficient of thermal expansion of alumina is 7.2xlO-6
/”about C).
(4)封着時、1600℃以下の温度で溶融可能である
こと。(4) It must be possible to melt at a temperature of 1600°C or less during sealing.
このような特性を満足するものとして、高圧ナトリウム
ランプなどにも使用されている封着材であるAfJ2O
3−CaO−MgO−BaOを使用していた。AfJ2O, a sealing material used in high-pressure sodium lamps, etc., satisfies these characteristics.
3-CaO-MgO-BaO was used.
しかしながら、上記Aj72O3−CaO−MgO−B
aOは封入金属ハロゲン化物と反応する欠点がある。However, the above Aj72O3-CaO-MgO-B
aO has the disadvantage of reacting with encapsulated metal halides.
特に金属ハロゲン化物としてスカンジウムScを用いた
場合、スカンジウムがCaOと強く反応し、スカンジウ
ムの発光が弱くなり、光特性が大幅に低下する。また、
同時にランプ電圧が下がり、電気特性が大きく変化する
。In particular, when scandium Sc is used as the metal halide, scandium reacts strongly with CaO, the light emission of scandium becomes weaker, and the optical properties are significantly deteriorated. Also,
At the same time, the lamp voltage decreases and the electrical characteristics change significantly.
そして、時間の経過とともに反応が進み、ついには封着
材がリークする欠点がある。There is a drawback that the reaction progresses over time and the sealing material eventually leaks.
したがって、透光性アルミナからなる発光管バルブを用
いたものでは、上述のような封入金属ハロゲン化物と封
着材との反応を抑えなければ、ランプの寿命に著しく悪
影響を及ぼすことになる。Therefore, in a lamp using an arc tube bulb made of translucent alumina, unless the reaction between the enclosed metal halide and the sealing material as described above is suppressed, the life of the lamp will be significantly adversely affected.
つまり、封着材2.2は、5番目の条件として、(5)
封入金属ハロゲン化物に対して耐化学反応性を有してい
ること。In other words, the sealing material 2.2 satisfies (5) as the fifth condition.
Must have chemical reactivity resistance to encapsulated metal halides.
が要求される。is required.
したがって、本発明の目的は、ハロゲン化スカンジウム
を封入したランプにおいて、封着材が化学反応せず、リ
ークの発生を防止してランプの寿命が向上する金属蒸気
放電灯を提供しようとするものである。Therefore, an object of the present invention is to provide a metal vapor discharge lamp in which the sealing material does not chemically react in a lamp filled with scandium halide, thereby preventing the occurrence of leakage and improving the life of the lamp. be.
[発明の構成〕
(課題を解決するための手段)
本発明者等は前記5つの条件を加味して種々の研究およ
び実験を重ねた結果、ハロゲン化スカンジウムを封入し
たランプは封着材として、AN 2O3− S i 0
2−希土類金属酸化物が良いことが分った。[Structure of the Invention] (Means for Solving the Problem) As a result of various studies and experiments taken into consideration by the present inventors, the present inventors have found that a lamp filled with scandium halide can be used as a sealing material. AN2O3- S i 0
2-Rare earth metal oxides were found to be good.
そこで、さらに検討および実験の結果、端部閉塞部材を
接合するための封着材としては、SiO2 を11〜
35重量%、
A、Q2O3を10〜40重量%、
S c 2 03 、E r2 03 、T
m2 03 、Yb2O3の1種以上を25〜70重
量%、の組成を有するものを使用すればよいとの結論に
至った。Therefore, as a result of further studies and experiments, SiO2 was used as the sealing material for joining the end closing member.
35% by weight, A, 10-40% by weight of Q2O3, S c 2 03 , E r2 03 , T
It was concluded that a material having a composition of 25 to 70% by weight of one or more of m2 03 and Yb2O3 should be used.
(作用) 本発明によると、以下の作用を奏する。(effect) According to the present invention, the following effects are achieved.
酸化アルミニウムAΩ2O3は、発光管の部品材料であ
るアルミナおよびサーメットに対して濡れ性がよく結合
性を向上させるとともに、化学安定性を高める効果を有
し、かつ熱膨張率をアルミナおよびサーメットに近似さ
せる作用がある。Aluminum oxide AΩ2O3 has good wettability with alumina and cermet, which are part materials for arc tubes, and improves bonding properties. It also has the effect of increasing chemical stability, and has a coefficient of thermal expansion similar to that of alumina and cermet. It has an effect.
なお、酸化アルミニウムの添加量が40重1%を越える
と融点が1600℃以上となり、封着作業が困難になる
。逆に酸化アルミニウムの添加量が10重量%未満であ
ると、上記酸化アルミニウムの効果が期待できなくなる
。Note that if the amount of aluminum oxide added exceeds 40% by weight, the melting point will be 1600° C. or higher, making the sealing work difficult. Conversely, if the amount of aluminum oxide added is less than 10% by weight, the above-mentioned effects of aluminum oxide cannot be expected.
二酸化ケイ素SiO2は融点の低下をもたらし、封着作
業を容易ならしめる効果がある。Silicon dioxide SiO2 has the effect of lowering the melting point and making the sealing work easier.
なお、二酸化ケイ素の添加量が35重量%を越えると熱
膨張率が著しく下がり、アルミナおよびサーメットの熱
膨張率と大きく差が生じてリークし易くなる。逆に二酸
化ケイ素の添加量が11重量%未満であると融点が16
00℃以上となり、封着作業が困難になる。It should be noted that if the amount of silicon dioxide added exceeds 35% by weight, the coefficient of thermal expansion will drop significantly, resulting in a large difference in coefficient of thermal expansion from that of alumina and cermet, making it easy to leak. Conversely, if the amount of silicon dioxide added is less than 11% by weight, the melting point will be 16%.
If the temperature exceeds 00°C, sealing work becomes difficult.
希土類金属酸化物は熱膨張率を高める作用を有するとと
もに、組成物の熱膨張率をアルミナと同程度(7,2X
10−6/”C)にし、さらにアルミナとの化合物を形
成して化学的安定性を高める作用がある。また、封着時
の溶解後、比較的早い降温を行っても封着生成物に結晶
相を持たせることができ、これは封着強度の向上につな
がる。The rare earth metal oxide has the effect of increasing the coefficient of thermal expansion, and the coefficient of thermal expansion of the composition is about the same as that of alumina (7.2X
10-6/"C) and further forms a compound with alumina to increase chemical stability.Also, even if the temperature is lowered relatively quickly after melting during sealing, the sealing product will not change. It can have a crystalline phase, which leads to improved sealing strength.
なお、希土類金属酸化物の添加量が70重量%を越える
と熱膨張率がアルミナより著しく大きくなりリークの原
因になる。また、希土類金属酸化物の添加量が25重量
%未満であると上記希土類金属酸化物の効果を期待する
ことができない。Note that if the amount of rare earth metal oxide added exceeds 70% by weight, the coefficient of thermal expansion will be significantly greater than that of alumina, causing leakage. Furthermore, if the amount of rare earth metal oxide added is less than 25% by weight, the effects of the rare earth metal oxide cannot be expected.
ところで、希土類金属酸化物の選択は、封入する金属ハ
ロゲン化物と関連しており、主封入金属ハロゲン化物が
ハロゲン化スカンジウムの場合は、S c2O3 、E
r 2O3 、Tm2 o3、Yb2O3しか使用す
ることができないことが分った。By the way, the selection of the rare earth metal oxide is related to the metal halide to be enclosed, and when the main metal halide to be enclosed is scandium halide, S c2O3 , E
It was found that only r2O3, Tm2o3, Yb2O3 can be used.
他の希土類金属酸化物であると、ハロゲン化スカンジウ
ムと反応し、長期点灯中に光特性、電気特性の低下を招
き、リークを発生する。Other rare earth metal oxides react with scandium halides, leading to deterioration of optical characteristics and electrical characteristics during long-term lighting, and causing leakage.
したがって、本発明によれば、ハロゲン化スカンジウム
を用いたものでありながら、化学的、物理的に安定した
封着材が得られ、リークの発生が防止されるとともに、
ランプ寿命が向上することになる。また、ハロゲン化ス
カンジウムを805モル比以上の高比率で封入したラン
プでも良好な結果が得られる。Therefore, according to the present invention, although using scandium halide, a chemically and physically stable sealing material can be obtained, and the occurrence of leakage can be prevented, and
Lamp life will be improved. Further, good results can also be obtained with a lamp containing scandium halide at a high molar ratio of 805 or more.
(実施例) 以下本発明について、実施例を説明する。(Example) Examples of the present invention will be described below.
発光管の構造は第1図の通りであり、これについての説
明は省略する。The structure of the arc tube is as shown in FIG. 1, and a description thereof will be omitted.
発光管バルブ1の両端に端部閉塞部材3.3を気密に接
合するための封着材2,2について、種々のサンプルを
作って150Wのメタルハライドランプを試作した。Various samples were made of the sealing materials 2, 2 for airtightly joining the end closing members 3.3 to both ends of the arc tube bulb 1, and a 150 W metal halide lamp was prototyped.
封着材は、A、1?2O3.5io2、Tm2 o。The sealing material is A, 1?2O3.5io2, Tm2o.
の各配合比を変えたものである。The blending ratios of each were changed.
封着材の作り方を説明すると、Al2O3、S i 0
2 、Tm2O3の特級試薬を秤量し、これにアセトン
を加えてボールミルで12時間湿式混合を行い、さらに
酢酸ビニルポリマーを5重量%となるように加え、1時
間混合を行った後、乾燥、造粒、成形を行い、リング状
の成形物を作った。To explain how to make the sealing material, Al2O3, S i 0
2. Weigh the Tm2O3 special reagent, add acetone to it, wet mix it in a ball mill for 12 hours, add vinyl acetate polymer to 5% by weight, mix it for 1 hour, dry it, and mix it for 1 hour. The grains were then molded to create a ring-shaped molded product.
このような固形封着材を使用して前記150Wのメタル
ハライドランプを試作した。この場合の封入物は、Sc
’13、NaIである。The above-mentioned 150W metal halide lamp was prototyped using such a solid sealing material. The inclusion in this case is Sc
'13, NaI.
試作したランプについて、気密性、寿命を調べ、かつそ
の接着剤の耐熱温度および熱膨張率を調べた。The airtightness and lifespan of the prototype lamp were investigated, as well as the temperature limit and coefficient of thermal expansion of the adhesive.
その結果を下記の第1表に示す。The results are shown in Table 1 below.
第 1 表
上記第1表から、サンプルNO3,4および5の封着材
が良好であり、Ai’2O3は14〜25重量%、5I
O2は2O〜40重量%、Tm2O3は47〜66重量
%の範囲であるがら、SiO2 は11〜35重量%
、
AI)2O3は10〜40重量%、
Tm2O3は25〜70重量%、
の各範囲に含まれていることが確認される。Table 1 From Table 1 above, the sealing materials of samples No. 3, 4 and 5 are good, and Ai'2O3 is 14 to 25% by weight, 5I
O2 ranges from 2O to 40% by weight, Tm2O3 ranges from 47 to 66% by weight, while SiO2 ranges from 11 to 35% by weight.
, AI)2O3 is 10 to 40% by weight, and Tm2O3 is 25 to 70% by weight.
なお、Tm2O3に代わって、Sc2O3、E r2o
3、Yb2O3を用いた場合でも同じような傾向の結果
が得られた。Note that instead of Tm2O3, Sc2O3, E r2o
3. Similar results were obtained when Yb2O3 was used.
次に上記好適な配合比を用いて使用が可能な希土類金属
酸化物の種類を調べてみた。Next, we investigated the types of rare earth metal oxides that can be used using the above-mentioned preferred blending ratio.
A1’2O3対SiO□対希土類金属酸化物の重量比関
係を、14 : 2O : 66の場合と、25;28
: 47の場合について、種々の希土類金属酸化物に
ついて封入される金属ハロゲン化物との反応を調べ、そ
の結果を下記第2表に示す。The weight ratio relationship of A1'2O3 to SiO□ to rare earth metal oxide is 14:2O:66 and 25;28.
: For the case of No. 47, the reaction of various rare earth metal oxides with the encapsulated metal halide was investigated, and the results are shown in Table 2 below.
なお、封入される金属ハロゲン化物はScI3、Nal
であり、評価は2O00時間点灯後の光特性および電気
特性で行った。Note that the metal halides to be encapsulated include ScI3, Nal
The evaluation was based on the optical characteristics and electrical characteristics after lighting for 2000 hours.
第 2 表
上記第2表の結果より、使用可能な希土類金属酸化物と
しては、サンプルNo1〜2およびNO19〜24に示
すように、Sc2O3、E r2O3 、Tm2 o3
およびYb2O3のいづれか1種以上であることが確認
された。Table 2 From the results in Table 2 above, usable rare earth metal oxides include Sc2O3, Er2O3, and Tm2O3, as shown in samples Nos. 1 to 2 and Nos. 19 to 24.
and Yb2O3.
[発明の効果]
以上説明したように本発明によると、発光管バルブ内に
封入される発光物質としてハロゲン化スカンジウムを用
いる場合、封着材として、SiO2 を11〜35重
量%、
Al2O3を10〜40重量%、
Sc2O3、Er2O3、Tm2O3、Yb2O3の1
種以上を25〜70重量%、の組成を有するものを使用
したので、先に説明した(1)〜(5)の条件を満足す
ることになり、したがってハロゲン化スカンジウムと封
着材の化学反応が発生しなく、リークの発生が防止され
てランプ寿命が向上する利点がある。[Effects of the Invention] As explained above, according to the present invention, when scandium halide is used as a luminescent substance sealed in an arc tube bulb, SiO2 is contained in an amount of 11 to 35% by weight and Al2O3 is contained in an amount of 10 to 35% by weight as a sealing material. 40% by weight, 1 of Sc2O3, Er2O3, Tm2O3, Yb2O3
Since we used a material having a composition of 25 to 70% by weight of 25% to 70% by weight, it satisfies the conditions (1) to (5) explained above, and therefore the chemical reaction between the scandium halide and the sealing material is This has the advantage of preventing leakage and improving lamp life.
第1図は従来および本発明の一実施例を示し、メタルハ
ライドランプの発光管を示す断面図である。
■・・・発光管バルブ、2・・・封着材、3・・・端部
閉塞部材、4・・・電極、5・・・外部導線。
出願人代理人 弁理士 鈴江武彦
第1図FIG. 1 is a sectional view showing an arc tube of a metal halide lamp, showing a conventional example and an embodiment of the present invention. ■... Arc tube bulb, 2... Sealing material, 3... End closing member, 4... Electrode, 5... External conductor. Applicant's agent Patent attorney Takehiko Suzue Figure 1
Claims (1)
に、ハロゲン化スカンジウムが封入された発光管を備え
た金属蒸気放電灯において、上記封着材は 11〜35重量%のSiO_2と、 10〜40重量%のAl_2O_3と、 25〜70重量%の少なくともSc_2O_3、Er_
2O_3、Tm_2O_3、Yb_2O_3から選択さ
れた1種以上の材料、 を含有していることを特徴とする金属蒸気放電灯。[Scope of Claims] A metal vapor discharge lamp having an arc tube whose end portion is sealed by a closing member via a sealing material and in which scandium halide is sealed, wherein the sealing material has a concentration of 11 to 35%. % by weight of SiO_2; 10-40% by weight of Al_2O_3; and 25-70% by weight of at least Sc_2O_3, Er_
A metal vapor discharge lamp characterized by containing one or more materials selected from 2O_3, Tm_2O_3, and Yb_2O_3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8381588A JPH01255149A (en) | 1988-04-05 | 1988-04-05 | Metal vapor discharge lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8381588A JPH01255149A (en) | 1988-04-05 | 1988-04-05 | Metal vapor discharge lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01255149A true JPH01255149A (en) | 1989-10-12 |
Family
ID=13813179
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8381588A Pending JPH01255149A (en) | 1988-04-05 | 1988-04-05 | Metal vapor discharge lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01255149A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6545413B1 (en) | 1997-10-13 | 2003-04-08 | Matsushita Electric Industrial Co., Ltd. | Metal halide lamp |
-
1988
- 1988-04-05 JP JP8381588A patent/JPH01255149A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6545413B1 (en) | 1997-10-13 | 2003-04-08 | Matsushita Electric Industrial Co., Ltd. | Metal halide lamp |
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