JPS62283543A - Metallic vapor discharge lamp - Google Patents
Metallic vapor discharge lampInfo
- Publication number
- JPS62283543A JPS62283543A JP12694886A JP12694886A JPS62283543A JP S62283543 A JPS62283543 A JP S62283543A JP 12694886 A JP12694886 A JP 12694886A JP 12694886 A JP12694886 A JP 12694886A JP S62283543 A JPS62283543 A JP S62283543A
- Authority
- JP
- Japan
- Prior art keywords
- cermet
- alumina
- tube
- insulating layer
- discharge 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.)
- Pending
Links
- 239000011195 cermet Substances 0.000 claims abstract description 30
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 21
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract description 11
- 230000006866 deterioration Effects 0.000 abstract description 6
- 229910001507 metal halide Inorganic materials 0.000 abstract description 4
- 150000005309 metal halides Chemical class 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 238000005245 sintering Methods 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 description 10
- 239000010937 tungsten Substances 0.000 description 10
- 239000000565 sealant Substances 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- GQKYKPLGNBXERW-UHFFFAOYSA-N 6-fluoro-1h-indazol-5-amine Chemical compound C1=C(F)C(N)=CC2=C1NN=C2 GQKYKPLGNBXERW-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-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
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- XQPRBTXUXXVTKB-UHFFFAOYSA-M caesium iodide Chemical compound [I-].[Cs+] XQPRBTXUXXVTKB-UHFFFAOYSA-M 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- CMJCEVKJYRZMIA-UHFFFAOYSA-M thallium(i) iodide Chemical compound [Tl]I CMJCEVKJYRZMIA-UHFFFAOYSA-M 0.000 description 1
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
［発明の利用分野］
本発明は透光性セラミック製発光管を用いたメタルハラ
イドランプの寿命特性の改善のための発光管構造の改良
に関するものである。[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Application of the Invention] The present invention relates to an improvement in the arc tube structure for improving the life characteristics of a metal halide lamp using a light-transmitting ceramic arc tube. It is.
［従来技術と問題点］
透光性セラミック製発光管を用いたメタルハライドラン
プの端部構造として第２図のような構造が提案されてい
る（特開昭５２−７１６９５号）同構造はアルミナ製発
光管２１とアルミナとタングステン金属からなる導電製
サーメツト製エンドキャップ２２を封着剤２３にて気密
封着した構造となっている。[Prior art and problems] A structure as shown in Fig. 2 has been proposed as an end structure of a metal halide lamp using a light-transmitting ceramic arc tube (Japanese Patent Application Laid-open No. 71695/1983).The structure is made of alumina. It has a structure in which an arc tube 21 and an end cap 22 made of a conductive cermet made of alumina and tungsten metal are hermetically sealed with a sealing agent 23.
ここで、第２図に示す構造のランプを点灯すると、点灯
直後のグロー放電からアーク放電へ移行するさいの不安
定な放電状態下において放電起点が第２図中の２２のサ
ーメット部から発生することが度々あるために、その熱
衝撃のためにサーメット部位にクラックが生じ１発光管
がリークし極端に寿命の短いランプがあることがわかっ
た。Here, when the lamp with the structure shown in Fig. 2 is lit, the discharge origin occurs from the cermet part 22 in Fig. 2 under an unstable discharge state when the lamp changes from glow discharge to arc discharge immediately after lighting. It has been found that some lamps have extremely short lifespans due to the thermal shock that often causes cracks in the cermet parts and leaks from the arc tube.
さらに、本発明者等はこの原因を詳細に検討した結果、
発光管内面にタングステン電極と略同様の仕事函数をも
ったサーメットが露出しているために、特に寿命末期に
タングステン電極に塗布された電子放射物質の仕事函数
が大きくなったり、トリエーテッドタングステン中のト
リアが消失したり、電極先端の形状変化によりサーメッ
ト部位から放電が発生したりすることをつきとめ、上記
サーメット内面にアルミナ等の絶縁層を設けることによ
ってバックアークによる劣化を防止することを提案した
。Furthermore, as a result of a detailed study of the cause, the present inventors found that
Because a cermet with approximately the same work function as the tungsten electrode is exposed on the inner surface of the arc tube, the work function of the electron emitting material coated on the tungsten electrode increases, especially at the end of its life, and They discovered that discharge occurs from the cermet due to disappearance of thoria or changes in the shape of the electrode tip, and proposed to prevent deterioration due to back arcing by providing an insulating layer such as alumina on the inner surface of the cermet.
しかしながら、本構造をもってしてもランプ点灯中の余
剰添加物がアルミナ絶縁層上を覆うことによって絶縁性
が低下し、上記と同様の劣化現象が生じることもあるこ
とがわかった。However, even with this structure, it has been found that during lamp operation, surplus additives cover the alumina insulating layer, resulting in a decrease in insulation properties, and the same deterioration phenomenon as described above may occur.
以上に述べたように特開昭５２−７１６９５号に開示さ
れたような発光管構造、あるいは単にサーメット内表面
に絶縁層を設けた構造としてもその寿命特性は著しく低
下するという事実を見出した６
［発明の目的］
本発明は上述した欠点を防止するためにサーメットエン
ドキャップの構造を改良し、長寿命の高圧金属蒸気放電
灯を提供することにある。As mentioned above, we have discovered the fact that even with an arc tube structure as disclosed in JP-A-52-71695, or a structure in which an insulating layer is simply provided on the inner surface of the cermet, its life characteristics are significantly reduced6. [Object of the Invention] The object of the present invention is to improve the structure of a cermet end cap in order to prevent the above-mentioned drawbacks, and to provide a long-life high-pressure metal vapor discharge lamp.
［発明の要旨コ
本発明により実現される放電灯は寿命中におけるサーメ
ットエンドキャップ部位からの放電を防止するために、
サーメット内表面に絶縁層を設けることは勿論、加えて
アルミナパイプとサーメットエンドキャップとの間のサ
ーメット側面にも同様にアルミナ等のアルミナ、タング
ステンサーメットの熱膨張係数に類似した電気的絶縁層
で覆うことにより封着層間の封着剤の欠損部からのバッ
クアークを防止することが可能となり、より長寿命のラ
ンプを提供することができた。[Summary of the Invention] In order to prevent discharge from the cermet end cap portion during the life of the discharge lamp realized by the present invention,
In addition to providing an insulating layer on the inner surface of the cermet, the side surface of the cermet between the alumina pipe and the cermet end cap is also covered with an electrically insulating layer that has a thermal expansion coefficient similar to that of alumina or tungsten cermet. This makes it possible to prevent back arcing from the defective part of the sealant between the sealing layers, making it possible to provide a lamp with a longer life.
［発明の構成作用コ 以下、本発明の詳細を第１図により説明する。[Constitutive action code of the invention] The details of the present invention will be explained below with reference to FIG.
同図において、透光性アルミナ管１１の管端部には、ア
ルミナとタングステン金属からなる凸状サーメットエン
ドキャップ１２が封着剤１３により封着されている、こ
のキャップの内面の中心位置には、タングステン等から
なる電極１４の基部が埋設固定されている。また、キャ
ップの外表面側には、タングステン、モリブデンなどか
らなるリード棒１５が、外部電源と接続するために埋設
固定されている６
凸状サーメツトエンドキヤツプ１２は、酸化アルミニウ
ムとタングステン金属の混合物を焼結したものであり１
体積固有抵抗値が１０ｍＡ・口から１０−’ｍ几・口の
間にあり導電性が高いもののほうが点灯時における動作
電流による過度の加熱を防げる。そして、そのエンドキ
ャップの発光管内面に露出した表面と封着部でもある側
表面にはアルミナ層１６が１ｍｍ以下の厚さで基体でも
あるサーメットエンドキャップと一体焼結されており、
電気的絶縁が計られた構造となっている。In the figure, a convex cermet end cap 12 made of alumina and tungsten metal is sealed to the end of a translucent alumina tube 11 with a sealing agent 13. The base of an electrode 14 made of , tungsten or the like is embedded and fixed. In addition, a lead rod 15 made of tungsten, molybdenum, etc. is buried and fixed on the outer surface of the cap for connection to an external power source 6. The convex cermet end cap 12 is made of a mixture of aluminum oxide and tungsten metal. 1
A lamp with a volume resistivity value of 10 mA between the opening and the opening of 10-'m and a high conductivity can prevent excessive heating due to the operating current during lighting. Then, an alumina layer 16 with a thickness of 1 mm or less is integrally sintered with the cermet end cap, which is also the base, on the surface of the end cap exposed to the inner surface of the arc tube and the side surface that is also the sealing part.
The structure is electrically insulated.
また、一方の発光管端部は封着剤を使わずにアルミナ管
とサーメットが一体化焼結した構造になっている。Furthermore, one end of the arc tube has a structure in which the alumina tube and cermet are integrally sintered without using a sealant.
実施例１
酸化アルミニウム粒度５０〜２１０．Ｌｌ、タングステ
ン粒度０．５〜１．５．Ｌｌでその混合比率（重量比）
で８５：１５に調整された粉末を用いてプレス成型され
た凸状サーメットエンドキャップに電極及びリード棒を
第１図のごとくに埋設した後に、ゾルアルミナ液を発光
管内面となる表面及び封着部となる側面に塗布してから
１８５０℃の水素炉中で２時間焼成することによってア
ルミナ層相の凸状サーメットエンドキャップか得られる
。Example 1 Aluminum oxide particle size 50-210. Ll, tungsten particle size 0.5-1.5. The mixing ratio (weight ratio) in Ll
After embedding electrodes and lead rods in a convex cermet end cap press-molded using powder adjusted to a ratio of 85:15 as shown in Figure 1, sol alumina liquid was applied to the surface and sealing area that will become the inner surface of the arc tube. A convex cermet end cap of an alumina layer phase is obtained by applying the coating to the side surface and firing it in a hydrogen furnace at 1850° C. for 2 hours.
実施例２
アルミナ絶１ｔ、Ｍを内表面と側面にもつ上記凸型エン
ドキャップを用いた発光管内にヨウ化ディスプロシウム
、ヨウ化タリウム、ヨウ化セシウム、ディスプロシウム
金属と、所定量の水銀及び始動用希ガスとしてのアルゴ
ンガスが１００Ｔｏｒｒ封入されている１５０Ｗのメタ
ルハライドランプを試作し、８時間点灯、１５分消灯の
点滅テストを行なった結果、１２点灯中全てが６５００
時間経過しても、発光管リーク、発光特性変化等の異常
はなく、また、これらのランプの中から数灯を取りだし
、発光管端部の劣化現象を金厘顕＊荒で観察したが全く
見られなかった・
実施例３
上記のサーメットエンドキャップにおいて発光管内表面
にのみ絶縁層をもった従来構造のランプも試作して上記
と同様のテストを行なったところ、１２灯中８灯が６５
００時間内に封着部からのバックアークにより発光管リ
ークに至り、それらのランプを全数金属顕微鏡にてサー
メット部内面をｗＡ察したところ、多少の差はあるが劣
化現象が全数において見られ、特に封着剤により充分に
封着部が覆われていなかった所謂欠損部のあるランプに
おいて、その欠損部からバックアークが激しく発生した
跡が観察された。Example 2 Dysprosium iodide, thallium iodide, cesium iodide, dysprosium metal, and a predetermined amount of mercury were placed in an arc tube using the above-mentioned convex end cap having 1 ton of alumina and M on the inner surface and side surfaces. We prototyped a 150W metal halide lamp filled with 100 Torr of argon gas as a rare gas for starting, and conducted a flashing test of 8 hours on and 15 minutes off, and as a result, all of the lamps were 6500 during 12 hours of lighting.
There were no abnormalities such as arc tube leaks or changes in light emitting characteristics over time, and I took out several of these lamps and observed the deterioration phenomenon at the end of the arc tube with a metallurgical microscope, but I found no problems. Example 3 When we prototyped a lamp with a conventional structure in which the cermet end cap described above had an insulating layer only on the inner surface of the arc tube and conducted the same test as above, 8 out of 12 lamps showed 65%.
Within 00 hours, arc tube leakage occurred due to back arc from the sealed part, and when the inner surface of the cermet part of all of the lamps was inspected using a metallurgical microscope, a deterioration phenomenon was observed in all of the lamps, although there were slight differences. In particular, in lamps with so-called defects where the sealed portion was not sufficiently covered with the sealant, traces of intense back arcing from the defects were observed.
以上説明したように、本発明の構造にすることによって
発光管点灯時のバンクアークが封着剤の欠損部において
露出されたサーメット基体から発生することなく電気的
絶縁性が完全に保たれるためにサーメットの劣化がない
ものとなる。As explained above, with the structure of the present invention, bank arcs do not occur from the cermet base exposed at the defective part of the sealant when the arc tube is lit, and electrical insulation is completely maintained. There will be no deterioration of the cermet.
本発明には高価なニオブ管を使わない高圧ナトリウムに
も適用が可能である。The present invention can also be applied to high-pressure sodium without using expensive niobium tubes.
さらには１本実施例において電気的絶縁層としてアルミ
ナを用いたが、スピネルあるいはガーネット等アルミナ
・タングステン製サーメットと熱膨張係数の近似した絶
縁層を用いてもよい。Furthermore, although alumina is used as the electrical insulating layer in this embodiment, an insulating layer having a thermal expansion coefficient similar to that of an alumina/tungsten cermet such as spinel or garnet may also be used.
第１図は本発明の実施例に基づく発光管の断面図、第２
図は従来の発光管の断面図である。FIG. 1 is a sectional view of an arc tube according to an embodiment of the present invention, and FIG.
The figure is a cross-sectional view of a conventional arc tube.
Claims (1)
の端部を、電極あるいはリード棒を埋設した導電性サー
メットで閉塞してなる放電灯において、前記導電性サー
メットの発光管内表面及び封着部位でもある側面に電気
的絶縁層を設けたことを特徴とする金属蒸気放電灯。 ２ 上記絶縁層がアルミナからなり、サーメットとは一
体化焼結されていることを特徴とする金属蒸気放電灯。[Scope of Claims] 1. In a discharge lamp in which at least one end of an arc tube made of a translucent alumina tube is closed with a conductive cermet in which an electrode or a lead rod is embedded, the interior of the arc tube of the conductive cermet is A metal vapor discharge lamp characterized by having an electrically insulating layer provided on the surface and the side surface which is also the sealing part. 2. A metal vapor discharge lamp characterized in that the insulating layer is made of alumina and is integrally sintered with the cermet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12694886A JPS62283543A (en) | 1986-05-31 | 1986-05-31 | Metallic vapor discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12694886A JPS62283543A (en) | 1986-05-31 | 1986-05-31 | Metallic vapor discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62283543A true JPS62283543A (en) | 1987-12-09 |
Family
ID=14947857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12694886A Pending JPS62283543A (en) | 1986-05-31 | 1986-05-31 | Metallic vapor discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62283543A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0414357U (en) * | 1990-05-24 | 1992-02-05 | ||
| US6137229A (en) * | 1997-09-26 | 2000-10-24 | Matsushita Electronics Corporation | Metal halide lamp with specific dimension of the discharge tube |
| US6208070B1 (en) | 1997-12-26 | 2001-03-27 | Matsushita Electronics Corporation | Metal vapor discharged lamp with specific angle between electrodes and tapered envelope wall |
| US6342764B1 (en) | 1999-05-24 | 2002-01-29 | Matsushita Electric Industrial Co., Ltd | High pressure discharge lamp |
| US6469442B2 (en) | 1999-05-25 | 2002-10-22 | Matsushita Electric Industrial Co., Ltd. | Metal vapor discharge lamp |
| US6639361B2 (en) | 1999-05-25 | 2003-10-28 | Matsushita Electric Industrial Co., Ltd. | Metal halide lamp |
| US6646379B1 (en) | 1998-12-25 | 2003-11-11 | Matsushita Electric Industrial Co., Ltd. | Metal vapor discharge lamp having cermet lead-in with improved luminous efficiency and flux rise time |
| US7211954B2 (en) | 2005-03-09 | 2007-05-01 | General Electric Company | Discharge tubes |
| US7279838B2 (en) | 2005-03-09 | 2007-10-09 | General Electric Company | Discharge tubes |
-
1986
- 1986-05-31 JP JP12694886A patent/JPS62283543A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0414357U (en) * | 1990-05-24 | 1992-02-05 | ||
| US6137229A (en) * | 1997-09-26 | 2000-10-24 | Matsushita Electronics Corporation | Metal halide lamp with specific dimension of the discharge tube |
| US6208070B1 (en) | 1997-12-26 | 2001-03-27 | Matsushita Electronics Corporation | Metal vapor discharged lamp with specific angle between electrodes and tapered envelope wall |
| US6646379B1 (en) | 1998-12-25 | 2003-11-11 | Matsushita Electric Industrial Co., Ltd. | Metal vapor discharge lamp having cermet lead-in with improved luminous efficiency and flux rise time |
| US6342764B1 (en) | 1999-05-24 | 2002-01-29 | Matsushita Electric Industrial Co., Ltd | High pressure discharge lamp |
| US6469442B2 (en) | 1999-05-25 | 2002-10-22 | Matsushita Electric Industrial Co., Ltd. | Metal vapor discharge lamp |
| US6639361B2 (en) | 1999-05-25 | 2003-10-28 | Matsushita Electric Industrial Co., Ltd. | Metal halide lamp |
| US7211954B2 (en) | 2005-03-09 | 2007-05-01 | General Electric Company | Discharge tubes |
| US7279838B2 (en) | 2005-03-09 | 2007-10-09 | General Electric Company | Discharge tubes |
| US7327085B2 (en) | 2005-03-09 | 2008-02-05 | General Electric Company | Discharge tubes |
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