JPH04233154A - Light emitting tube for ceramic discharge lamp - Google Patents
Light emitting tube for ceramic discharge lampInfo
- Publication number
- JPH04233154A JPH04233154A JP40876990A JP40876990A JPH04233154A JP H04233154 A JPH04233154 A JP H04233154A JP 40876990 A JP40876990 A JP 40876990A JP 40876990 A JP40876990 A JP 40876990A JP H04233154 A JPH04233154 A JP H04233154A
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- emitting tube
- discharge lamp
- arc tube
- ceramic discharge
- 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 11
- JNDMLEXHDPKVFC-UHFFFAOYSA-N aluminum;oxygen(2-);yttrium(3+) Chemical compound [O-2].[O-2].[O-2].[Al+3].[Y+3] JNDMLEXHDPKVFC-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000843 powder Substances 0.000 abstract description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 229910019655 synthetic inorganic crystalline material Inorganic materials 0.000 description 7
- 238000002834 transmittance Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000010453 quartz Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001507 metal halide Inorganic materials 0.000 description 2
- 150000005309 metal halides Chemical class 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- 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
- 238000005266 casting Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、キセノン，ハロゲン，
メタルハライドランプ等の放電灯用発光管に関する。[Industrial Application Field] The present invention relates to xenon, halogen,
This invention relates to arc tubes for discharge lamps such as metal halide lamps.
【０００２】0002
【従来の技術】図３は従来の放電灯用発光管の構造例を
示す。従来の放電灯２０は両電極２１，２２間にキセノ
ンを充填し、最も温度の上昇する電極部付近との距離を
十分とる必要から中央部が大きく球状に膨れた発光管２
３によってシールした構造を有する。そして、この発光
管２３としては、例えば特開昭５６−１０２０６２号公
報に記載されているように、高圧ナトリウムランプには
透光性多結晶アルミナが使用され、メタルハライドラン
プの発光管としては石英が主として用いられている。2. Description of the Related Art FIG. 3 shows an example of the structure of a conventional arc tube for a discharge lamp. The conventional discharge lamp 20 has a discharge lamp 2 in which xenon is filled between both electrodes 21 and 22, and the central part of the arc tube 2 is swollen into a large spherical shape because it is necessary to maintain a sufficient distance from the vicinity of the electrode where the temperature rises the most.
It has a sealed structure by 3. As described in Japanese Patent Application Laid-Open No. 56-102062, for example, transparent polycrystalline alumina is used as the arc tube 23 for high-pressure sodium lamps, and quartz is used as the arc tube for metal halide lamps. Mainly used.
【０００３】0003
【発明が解決しようとする課題】かかる発光管として必
要とされる特性は、透明度すなわち直線透過性が高いこ
と、光源が発熱光源であることから熱伝導率が比較的高
いこと、可視〜赤外領域の透過波長領域が広いこと、耐
熱温度が高い等の要求を満たす必要がある。[Problems to be Solved by the Invention] The characteristics required for such an arc tube are high transparency, that is, straight line transmittance, relatively high thermal conductivity because the light source is a heat-generating light source, and visible to infrared light. It is necessary to satisfy requirements such as a wide transmission wavelength range and a high heat resistance temperature.
【０００４】石英や透光性アルミナを用いる場合、前者
は透明性は良好なものの耐熱温度が低いこと、後者は耐
熱温度は高い反面、直線透過の比率が低い。When using quartz or translucent alumina, the former has good transparency but has a low heat resistance, while the latter has a high heat resistance but has a low linear transmission ratio.
【０００５】本発明において解決すべき課題は、従来の
セラミックス発光管よりも透明度と熱伝導率とさらには
耐熱性において優れ、しかも、発光管として比較的簡単
に成形、焼結できるセラミックス材を見出すことにある
。The problem to be solved by the present invention is to find a ceramic material that is superior in transparency, thermal conductivity, and heat resistance to conventional ceramic arc tubes, and that can be relatively easily formed and sintered as an arc tube. There is a particular thing.
【０００６】[0006]
【課題を解決するための手段】本発明は、イットリウム
・アルミニウム・ガーネット多結晶を形成する粉末をＣ
ＩＰ、プレス、鋳込み等により形成して得た結晶体を放
電灯用発光管に適用することによりこの課題を解決した
。[Means for Solving the Problems] The present invention provides powder for forming yttrium aluminum garnet polycrystals.
This problem was solved by applying a crystalline material formed by IP, pressing, casting, etc. to an arc tube for a discharge lamp.
【０００７】[0007]
【作用】上記ＹＡＧセラミックスは透明度が石英とほぼ
同等であることの他に、融点が１９５０°Ｃであり、耐
熱性に優れ、発光の放射熱に十分耐えることができるこ
とから、ＹＡＧセラミックスはセラミックス製発光管と
して最も好適であることを見出した。さらには、ＹＡＧ
セラミックスは通常の焼結法を適用することによって比
較的簡単に製造できる。[Function] In addition to the transparency of YAG ceramics, which is almost the same as that of quartz, YAG ceramics has a melting point of 1950°C, has excellent heat resistance, and can sufficiently withstand the radiant heat of light emission. It has been found that it is most suitable as an arc tube. Moreover, YAG
Ceramics can be manufactured relatively easily by applying normal sintering methods.
【０００８】[0008]
【実施例】図１は単結晶アルミナ，多結晶透光性アルミ
ナおよび本発明において使用した多結晶透明ＹＡＧセラ
ミックスの光学スペクトルを示す図である。EXAMPLE FIG. 1 is a diagram showing optical spectra of single crystal alumina, polycrystalline transparent alumina, and polycrystalline transparent YAG ceramics used in the present invention.
【０００９】多結晶透光性アルミナは直線透過性に乏し
く可視領域で約３０％の透過性しか得られないが、単結
晶アルミナと多結晶透明ＹＡＧセラミックスは同程度の
高い透過性を示すのがわかる。[0009] Polycrystalline translucent alumina has poor straight-line transmittance and can only obtain about 30% transmittance in the visible region, but single-crystal alumina and polycrystalline transparent YAG ceramics exhibit similar high transmittance. Recognize.
【００１０】図２は本発明の多結晶透明ＹＡＧセラミッ
クスを発光管１として使用した実施例を示す。FIG. 2 shows an example in which the polycrystalline transparent YAG ceramic of the present invention is used as the arc tube 1.
【００１１】同図に示すように、本発明の放電灯１０を
形成する発光管１は耐熱性に優れているために両電極１
１、 １２部の外径と略同一径の円筒状に形成するこ
とができ、体積比で１／２程度に設計でき、発光管自体
もシンプルなパイプ状としている。As shown in the figure, since the arc tube 1 forming the discharge lamp 10 of the present invention has excellent heat resistance, both electrodes 1
It can be formed into a cylindrical shape with approximately the same diameter as the outer diameter of parts 1 and 12, and can be designed to have a volume ratio of about 1/2, and the arc tube itself is also shaped like a simple pipe.
【００１２】0012
【発明の効果】本発明によって以下の効果を奏すること
ができる。[Effects of the Invention] The following effects can be achieved by the present invention.
【００１３】（１）光透過性に優れた発光管を使用して
いるので発光効率を向上できる。(1) Since an arc tube with excellent light transmittance is used, luminous efficiency can be improved.
【００１４】（２）放電灯自体を小さく形成できる。(2) The discharge lamp itself can be made small.
【００１５】（３）製造工程として通常の粉末冶金法が
適用できるのでコスト面で有利である。(3) Since the usual powder metallurgy method can be applied to the manufacturing process, it is advantageous in terms of cost.
【図１】本発明に使用する多結晶質ＹＡＧセラミックス
と従来使用されてきた多結晶アルミナとの光透過性の比
較データを示す図である。FIG. 1 is a diagram showing comparative data of light transmittance between polycrystalline YAG ceramics used in the present invention and polycrystalline alumina conventionally used.
【図２】本発明の発光管を使用した放電灯の構造を示す
図である。FIG. 2 is a diagram showing the structure of a discharge lamp using the arc tube of the present invention.
【図３】従来の発光管を使用した放電灯の構造を示す図
である。FIG. 3 is a diagram showing the structure of a discharge lamp using a conventional arc tube.
１ 発光管 １０ 放電灯 １１ 電極 １２ 電極 ２０ 放電灯 ２１ 電極 ２２ 電極 ２３ 発光管 1 Arc tube 10 Discharge lamp 11 Electrode 12 Electrode 20 Discharge lamp 21 Electrode 22 Electrode 23 Arc tube
Claims (1)
ット多結晶質セラミックスからなる放電灯用発光管。1. An arc tube for a discharge lamp made of yttrium-aluminum-garnet polycrystalline ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40876990A JPH04233154A (en) | 1990-12-28 | 1990-12-28 | Light emitting tube for ceramic discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40876990A JPH04233154A (en) | 1990-12-28 | 1990-12-28 | Light emitting tube for ceramic discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04233154A true JPH04233154A (en) | 1992-08-21 |
Family
ID=18518184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP40876990A Pending JPH04233154A (en) | 1990-12-28 | 1990-12-28 | Light emitting tube for ceramic discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04233154A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6916559B2 (en) | 1997-02-26 | 2005-07-12 | Kyocera Corporation | Ceramic material resistant to halogen plasma and member utilizing the same |
| JP2011249310A (en) * | 2010-04-30 | 2011-12-08 | Toshiba Lighting & Technology Corp | Lamp with base and lighting fixture |
| JP2012531724A (en) * | 2009-07-06 | 2012-12-10 | カイゼン カンパニー リミテッド | Xenon lamp using ceramic arc tube |
-
1990
- 1990-12-28 JP JP40876990A patent/JPH04233154A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6916559B2 (en) | 1997-02-26 | 2005-07-12 | Kyocera Corporation | Ceramic material resistant to halogen plasma and member utilizing the same |
| JP2012531724A (en) * | 2009-07-06 | 2012-12-10 | カイゼン カンパニー リミテッド | Xenon lamp using ceramic arc tube |
| JP2011249310A (en) * | 2010-04-30 | 2011-12-08 | Toshiba Lighting & Technology Corp | Lamp with base and lighting fixture |
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