JPH049750B2 - - Google Patents
Info
- Publication number
- JPH049750B2 JPH049750B2 JP13006584A JP13006584A JPH049750B2 JP H049750 B2 JPH049750 B2 JP H049750B2 JP 13006584 A JP13006584 A JP 13006584A JP 13006584 A JP13006584 A JP 13006584A JP H049750 B2 JPH049750 B2 JP H049750B2
- Authority
- JP
- Japan
- Prior art keywords
- sealing
- weight
- tube
- metal halide
- alumina ceramic
- 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
- 238000007789 sealing Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 13
- 239000003566 sealing material Substances 0.000 description 13
- 229910001507 metal halide Inorganic materials 0.000 description 10
- 150000005309 metal halides Chemical class 0.000 description 10
- 239000000463 material Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000011195 cermet Substances 0.000 description 4
- 238000004017 vitrification Methods 0.000 description 4
- 238000009736 wetting Methods 0.000 description 4
- 229910052681 coesite Inorganic materials 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- NLQFUUYNQFMIJW-UHFFFAOYSA-N dysprosium(III) oxide Inorganic materials O=[Dy]O[Dy]=O NLQFUUYNQFMIJW-UHFFFAOYSA-N 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- 238000009877 rendering Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000565 sealant Substances 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
- 239000000654 additive Substances 0.000 description 1
- 229910001615 alkaline earth metal halide Inorganic materials 0.000 description 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Description
産業上の利用分野
本発明は透光性アルミナセラミツクの封着材料
に関するもので、特に高温にて点灯させるアルミ
ナセラミツク管を用いたメタルハライドランプの
両端部に使用される封着用組成物の改良に関す
る。
従来技術
メタルハライドランプの発光管材料として溶融
石英が用いられている。この材料を用いた発光管
では、点灯時の最高許容温度が約900℃程度であ
るため、DyI3等の低蒸気圧の物を発光させて、
高効率、高演色を達成しようとしてもそれらの充
分な蒸気圧が得がたい。そのために更に高い点灯
時の最高許容温度を有するメタルハライドに対し
て安定な材料として高圧ナトリウムランプの発光
管材料として用いられている透光性アルミナセラ
ミツク管が用いられる。この透光性アルミナは、
最高許容温度を約1200℃とすることが可能であ
り、更に多くのハロゲン化物に対して化学的安定
性が高い。この透光性アルミナセラミツク管の端
部をサーメツトデイスクと封着材を用いて封じ
る。この封着材としてCaO−MgO−Al2O3系、
CaO−BaO−MgO−Al2O3系、Al2O3−SiO2−
B2O3−MgO系、BeO−Al2O3−SiO2系等が公知
である。これらの封着材には、発光管を高効率、
高演色性の状態で点灯させるのに必要な動作温度
になるまで管壁負荷を増加させると軟化して端部
キヤツプが浮き上がり、リークに至るものが多か
つた。また、これらの封着材成分で、特にアルカ
リ土類金属酸化物を含有するものは、発光管中に
添加されているメタルハライドと反応し、アルカ
リ土類金属ハロゲン化物となり放電空間中に放出
され発光する。そのため、添加したメタルハライ
ドが酸化物となり、放電空間中への添加メタルハ
ライドの供給が減少し、効率、演色性が初期設計
値から大きくずれたものとなる。このように公知
の封着材のセラミツクメタルハライドランプへの
使用には、実用上問題のあるものが多い。
発明が解決しようとする問題点
本発明は、上記の従来の封着材のもつ欠点を除
去もしくは、減少させた、耐ハロゲン性が高く、
軟化点も高く、又、濡れ特性が良好で気泡を包含
しない、接着強度の高い均一な封着が可能な封着
材を提供するものである。
問題点を解決するための手段
セラミツクメタルハライドランプ用の封着材
は、次のような条件を満たしていなければならな
い。まず、ランプ点灯中でも気密性が保持され、
高い機械的強度を有する強固な封着が得られるこ
と、放電空間中への不純物の混入を少なくする低
蒸気圧封着材構成要素が使用されていること、ア
ルミナセラミツク管およびサーメツトデイスクに
対して良好な濡れ特性を有し1300〜1450℃で溶融
すること、アルミナセラミツク管およびサーメツ
トデイスクと封着材の線膨張係数が大巾に相異し
ないこと、かつメタルハライド等の発光管内添加
物および発光管構成材料と点灯中に反応しないこ
とが必要である。
上記の条件を満たすべく実験を行つた結果
Dy2O3−Al2O3−SiO2−B2O3系の封着材組成物が
良好な封着特性を有すことがわかつた。
又、本発明に係るDy2O3−Al2O3−SiO2−B2O3
四成分系の組成範囲は以下の通りである。
Dy2O3 ：40〜85重量％
Al2O3 ： ５〜50重量％
SiO2 ： ５〜50重量％
B2O3 ： ２〜25重量％
ここで、Dy2O3の量を85重量％以上にするとガ
ラス化反応温度が上昇してしまい、封着作業が困
難になる。Al2O3を50重量％以上にすると、同様
なことが発生し、また気泡が多数発生してしま
う。SiO2を50重量％以上とすると、上記同様ガ
ラス化反応温度が上昇し、更にクラツクが発生し
て、リークに至る。B2O3を25重量％以上にする
と、封着材の軟化点が下がり、発光管点灯中にデ
イスクが浮き上がり、リークしてしまう。また、
S2O3を添加しないと、ガラス化反応温度が上昇
してしまい、更に、濡れ特性が悪化し気泡が多数
発生して封着が不可能となつてしまう。
従つて上記酸化物成分を、上記組成範囲内にお
いて適当に調合すると、耐ハロゲン性に優れたア
ルミナセラミツク、サーメツトデイスクと線膨張
係数が適当に合致した気密性の高い、そして軟化
点の高い良好な封着が得られる。
実施例
次に本発明にかかる実施例を述べる。第１表に
示した組成のそれぞれの酸化物成分を機械的に混
合した後に、有機結合剤と混合し適当な大きさの
座金もしくは小円板状に成形する。この成形され
た封着材をアルミナセラミツク管の端部とエンド
キヤツプの封着部に配置し、同封着部を、真空あ
るいは希ガス中にて、1400〜1500℃に加熱するこ
とによつて同部を封着する。
第１表中のそれぞれの実施例において、そのガ
ラス化反応温度、溶融時の粘度等に多少の差はあ
るがいずれの封着材も気密性が良好であり、実用
上問題のない封着状態であつた。
INDUSTRIAL APPLICATION FIELD The present invention relates to a sealing material for translucent alumina ceramic, and in particular to an improvement in a sealing composition used at both ends of a metal halide lamp using an alumina ceramic tube that is lit at high temperatures. Prior Art Fused quartz is used as an arc tube material for metal halide lamps. For arc tubes made of this material, the maximum allowable temperature during lighting is about 900°C, so if a material with low vapor pressure such as DyI 3 is used to emit light,
Even if one attempts to achieve high efficiency and high color rendering, it is difficult to obtain sufficient vapor pressure. For this purpose, a translucent alumina ceramic tube, which is used as an arc tube material for high-pressure sodium lamps, is used as a material that is stable against metal halides and has a higher maximum allowable temperature during lighting. This translucent alumina is
It is possible to set the maximum allowable temperature to about 1200°C, and it has high chemical stability against many halides. The ends of this translucent alumina ceramic tube are sealed using a cermet disk and a sealing material. As this sealing material, CaO−MgO−Al 2 O 3 system,
CaO−BaO−MgO−Al 2 O 3 system, Al 2 O 3 −SiO 2 −
B2O3 - MgO system, BeO- Al2O3 - SiO2 system, etc. are known. These sealing materials are used to seal arc tubes with high efficiency.
When the tube wall load was increased to the operating temperature required for lighting in a high color rendering state, the tube wall softened and the end caps lifted up, often leading to leaks. In addition, among these sealing material components, those containing alkaline earth metal oxides in particular react with the metal halide added to the arc tube and become alkaline earth metal halides, which are released into the discharge space and emit light. do. Therefore, the added metal halide becomes an oxide, the supply of the added metal halide into the discharge space decreases, and the efficiency and color rendering properties greatly deviate from the initial design values. As described above, many of the known sealing materials have practical problems when used in ceramic metal halide lamps. Problems to be Solved by the Invention The present invention eliminates or reduces the drawbacks of the conventional sealing materials described above, and has high halogen resistance.
The present invention provides a sealing material that has a high softening point, good wetting properties, does not contain air bubbles, and is capable of uniform sealing with high adhesive strength. Means for solving the problem Sealing materials for ceramic metal halide lamps must satisfy the following conditions. First, the airtightness is maintained even when the lamp is on.
It provides a strong seal with high mechanical strength, uses low vapor pressure sealant components that reduce the ingress of impurities into the discharge space, and is highly effective against alumina ceramic tubes and cermet disks. It has good wetting properties and melts at 1300 to 1450℃, the coefficient of linear expansion of the sealing material is not significantly different from that of the alumina ceramic tube and cermet disk, and it is free from additives in the arc tube such as metal halides and It is necessary that it does not react with the constituent materials of the arc tube during lighting. Results of experiments to satisfy the above conditions
It was found that a Dy 2 O 3 -Al 2 O 3 -SiO 2 -B 2 O 3 based sealant composition has good sealing properties. Moreover , Dy2O3 - Al2O3 - SiO2 - B2O3 according to the present invention
The composition range of the four-component system is as follows. Dy2O3 : 40-85 % by weight Al2O3 : 5-50% by weight SiO2 : 5-50% by weight B2O3 : 2-25% by weight Here , the amount of Dy2O3 is 85% by weight . % or more, the vitrification reaction temperature will rise and the sealing work will become difficult. When Al 2 O 3 is increased to 50% by weight or more, a similar problem occurs and a large number of bubbles are generated. If the SiO 2 content is 50% by weight or more, the vitrification reaction temperature increases as described above, and cracks occur, leading to leakage. If the B 2 O 3 content exceeds 25% by weight, the softening point of the sealing material will be lowered, causing the disk to rise during lighting of the arc tube and causing leakage. Also,
If S 2 O 3 is not added, the vitrification reaction temperature will rise, and furthermore, the wetting properties will deteriorate and a large number of bubbles will be generated, making sealing impossible. Therefore, if the above-mentioned oxide components are appropriately blended within the above-mentioned composition range, it is possible to obtain a material with high airtightness and a high softening point, whose linear expansion coefficient appropriately matches that of alumina ceramics and cermet disks, which have excellent halogen resistance. A good seal can be obtained. Examples Next, examples according to the present invention will be described. After mechanically mixing the respective oxide components having the composition shown in Table 1, they are mixed with an organic binder and formed into a suitably sized washer or small disk. This molded sealing material is placed between the end of the alumina ceramic tube and the end cap, and the sealed portion is heated to 1400 to 1500°C in vacuum or in a rare gas. Seal the parts. In each of the examples in Table 1, although there are some differences in the vitrification reaction temperature, viscosity at the time of melting, etc., all sealing materials have good airtightness, and the sealing state does not pose any practical problem. It was hot.
【表】
このように、管内にDyI3，TlI，Hg，Dyを封
入した透光性アルミナセラミツク管を用いたメタ
ルハライドランプを作成して、長時間（1000時
間）点灯したが、リークはなく又発光特性の変化
も少なかつた。
発明の効果
以上の説明から明らかなように、本発明に係る
封着用組成物は耐ハロゲン性が高く、又軟化点も
高く更に濡れ特性が良好で気泡を包含しない利点
と共に接着強度が高く均一な封着が可能である等
の利点を有する。[Table] In this way, we created a metal halide lamp using a translucent alumina ceramic tube with DyI 3 , TlI, Hg, and Dy sealed inside the tube, and it was lit for a long time (1000 hours), but there was no leakage. There was also little change in luminescent properties. Effects of the Invention As is clear from the above description, the sealing composition according to the present invention has high halogen resistance, a high softening point, good wetting properties, no bubbles, and high adhesive strength and uniformity. It has advantages such as being able to be sealed.
Claims (1)
Al2O3、５〜50重量％のSiO2及び２〜25重量％の
B2O3を含有してなるセラミツクとセラミツク又
はセラミツクと金属とを封着するための封着用組
成物。1 40-85% by weight Dy 2 O 3 , 5-50% by weight
Al 2 O 3 , 5-50 wt% SiO 2 and 2-25 wt%
A sealing composition for sealing a ceramic containing B 2 O 3 and a ceramic or a ceramic and a metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13006584A JPS6110083A (en) | 1984-06-26 | 1984-06-26 | Sealing composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13006584A JPS6110083A (en) | 1984-06-26 | 1984-06-26 | Sealing composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6110083A JPS6110083A (en) | 1986-01-17 |
| JPH049750B2 true JPH049750B2 (en) | 1992-02-21 |
Family
ID=15025171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13006584A Granted JPS6110083A (en) | 1984-06-26 | 1984-06-26 | Sealing composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6110083A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0618429Y2 (en) * | 1987-08-29 | 1994-05-18 | 大介 藤井 | Leaf tobacco harvesting vehicle |
| US7659220B1 (en) * | 2008-12-03 | 2010-02-09 | Osram Sylvania Inc. | Sealing composition for sealing aluminum nitride and aluminum oxynitride ceramics |
-
1984
- 1984-06-26 JP JP13006584A patent/JPS6110083A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6110083A (en) | 1986-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4159708B2 (en) | Lamp glass composition, lamp stem and lamp bulb | |
| US4666871A (en) | Glass composition suitable for use in a fluorescent lamp, tube and lamp envelope manufactured from said glass composition, and fluorescent lamp having a lamp envelope manufactured from said glass composition | |
| US7741237B1 (en) | Sealing composition for sealing aluminum nitride and aluminum oxynitride ceramics | |
| CA1311012C (en) | Arc tube and high pressure discharge lamp including same | |
| US3588577A (en) | Calcia alumina magnesia baria seal composition | |
| US4342937A (en) | Metal halogen vapor lamp provided with a heat reflecting layer | |
| JPH049750B2 (en) | ||
| KR100985024B1 (en) | An electric lamp comprising a glas component | |
| US4680503A (en) | Glass composition suitable for use in a fluorescent lamp and in a cathode-ray tube, fluorescent lamp and cathode-ray tube manufactured using this glass composition | |
| JPS6186445A (en) | Composition for sealing | |
| US5498927A (en) | Low-pressure sodium discharge lamp having sealed current conductors with first and second glass coating | |
| US5208509A (en) | Arc tube for high pressure metal vapor discharge lamp | |
| JP2004362847A (en) | Junction, luminescent vessel, assembly body for high-pressure discharge lamp, and high-pressure discharge lamp | |
| JPS5910940B2 (en) | Heat-resistant sealing glass composition | |
| JPS58190877A (en) | Sealing composition | |
| US5188554A (en) | Method for isolating arc lamp lead-in from frit seal | |
| JPS6236992B2 (en) | ||
| JPS62128945A (en) | Sealing composition | |
| KR102556700B1 (en) | Integrated sealing method for metal-ceramic joints | |
| EP0341749A2 (en) | Improved arc tube for high pressure metal vapor discharge lamp, lamp including same, and method | |
| JP2000315477A (en) | Fluorescent lamp | |
| JPH0411511B2 (en) | ||
| JPH0483769A (en) | Composition for sealing | |
| JP2007297273A (en) | Glass composition for lamp, and stem and bulb for lamp | |
| JPS6140876A (en) | Sealing composition |