JPH0339382B2 - - Google Patents
Info
- Publication number
- JPH0339382B2 JPH0339382B2 JP20590783A JP20590783A JPH0339382B2 JP H0339382 B2 JPH0339382 B2 JP H0339382B2 JP 20590783 A JP20590783 A JP 20590783A JP 20590783 A JP20590783 A JP 20590783A JP H0339382 B2 JPH0339382 B2 JP H0339382B2
- Authority
- JP
- Japan
- Prior art keywords
- arc tube
- glass solder
- oxide
- metal
- tube
- 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
- 229910000679 solder Inorganic materials 0.000 claims description 35
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 19
- 239000000919 ceramic Substances 0.000 claims description 16
- 239000011241 protective layer Substances 0.000 claims description 11
- 229910052783 alkali metal Inorganic materials 0.000 claims description 10
- 150000001340 alkali metals Chemical class 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000011734 sodium Substances 0.000 description 17
- 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 16
- 229910052708 sodium Inorganic materials 0.000 description 16
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 14
- 239000000292 calcium oxide Substances 0.000 description 8
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 5
- 229910001507 metal halide Inorganic materials 0.000 description 5
- 150000005309 metal halides Chemical class 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000395 magnesium oxide Substances 0.000 description 4
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 4
- 239000003566 sealing material Substances 0.000 description 4
- -1 sodium Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- 229910052758 niobium Inorganic materials 0.000 description 3
- 239000010955 niobium Substances 0.000 description 3
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 3
- 238000009877 rendering Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VQCBHWLJZDBHOS-UHFFFAOYSA-N erbium(iii) oxide Chemical compound O=[Er]O[Er]=O VQCBHWLJZDBHOS-UHFFFAOYSA-N 0.000 description 2
- 150000004820 halides Chemical class 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- PLDDOISOJJCEMH-UHFFFAOYSA-N neodymium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Nd+3].[Nd+3] PLDDOISOJJCEMH-UHFFFAOYSA-N 0.000 description 2
- ZIKATJAYWZUJPY-UHFFFAOYSA-N thulium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[Tm+3].[Tm+3] ZIKATJAYWZUJPY-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 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
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 229910003440 dysprosium oxide Inorganic materials 0.000 description 1
- NLQFUUYNQFMIJW-UHFFFAOYSA-N dysprosium(iii) oxide Chemical compound O=[Dy]O[Dy]=O NLQFUUYNQFMIJW-UHFFFAOYSA-N 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- JYTUFVYWTIKZGR-UHFFFAOYSA-N holmium oxide Inorganic materials [O][Ho]O[Ho][O] JYTUFVYWTIKZGR-UHFFFAOYSA-N 0.000 description 1
- OWCYYNSBGXMRQN-UHFFFAOYSA-N holmium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ho+3].[Ho+3] OWCYYNSBGXMRQN-UHFFFAOYSA-N 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- MJGFBOZCAJSGQW-UHFFFAOYSA-N mercury sodium Chemical compound [Na].[Hg] MJGFBOZCAJSGQW-UHFFFAOYSA-N 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000010979 ruby Substances 0.000 description 1
- 229910001750 ruby Inorganic materials 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- HYXGAEYDKFCVMU-UHFFFAOYSA-N scandium oxide Chemical compound O=[Sc]O[Sc]=O HYXGAEYDKFCVMU-UHFFFAOYSA-N 0.000 description 1
- HUIHCQPFSRNMNM-UHFFFAOYSA-K scandium(3+);triiodide Chemical compound [Sc+3].[I-].[I-].[I-] HUIHCQPFSRNMNM-UHFFFAOYSA-K 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 235000009518 sodium iodide Nutrition 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
- H01J61/361—Seals between parts of vessel
- H01J61/365—Annular seals disposed between the ends of the vessel
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は透光性セラミクス管を発光管バルブと
するアルカリ金属蒸気放電灯に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an alkali metal vapor discharge lamp using a translucent ceramic tube as an arc tube bulb.
透光性セラミクスたとえば多結晶体のアルミナ
セラミクスまたはルビー、サフアイアのような金
属酸化物単結晶体などからなる発光管を有するア
ルカリ金属蒸気放電灯たとえば高圧ナトリウムラ
ンプは透光性セラミクス発光管バルブ内にキセノ
ンなどの始動用希ガス、水銀およびナトリウムを
封入した発光管を、一端に口金を装着した外管内
に封装して形成され、高圧水銀灯などに較べて発
光効率がきわめて高いので省電力光源として近年
一層注目されている。
Alkali metal vapor discharge lamps with arc tubes made of translucent ceramics, such as polycrystalline alumina ceramics or metal oxide single crystals such as ruby and sapphire, etc.For example, high-pressure sodium lamps are equipped with translucent ceramic arc tubes in bulbs. It is formed by sealing an arc tube filled with a rare starting gas such as xenon, mercury, and sodium inside an outer tube with a cap attached to one end.It has been used in recent years as a power-saving light source because it has extremely high luminous efficiency compared to high-pressure mercury lamps. It is attracting more attention.
上記透光性セラミクス管は熱加工が困難である
ためその両端開口部は別体の閉塞体により封止し
ている。閉塞体はニオブなどの耐熱性金属または
セラミクスで形成され、透光性セラミクス管に対
してガラスソルダのような封着材を介して気密に
接合される。 Since the translucent ceramic tube is difficult to heat-process, its openings at both ends are sealed with separate closing bodies. The closing body is made of a heat-resistant metal such as niobium or ceramics, and is hermetically joined to the translucent ceramic tube via a sealing material such as glass solder.
さらに、金属閉塞体を使用した場合には電極を
支持する電流導入体を溶接などで金属閉塞体に固
着するが、セラミクス閉塞体を使用した場合には
上記電流導入体をガラスソルダを介して気密に閉
塞体を貫通して支持させる。 Furthermore, when a metal closure is used, the current introduction body that supports the electrode is fixed to the metal closure by welding, but when a ceramic closure is used, the current introduction body is sealed airtight via glass solder. penetrate and support the obturator.
このような構成の高圧ナトリウムランプは発光
管の温度をより高めることによつて、封入発光金
属のナトリウムの蒸気圧を高くして発光スペクト
ル領域を広げて演色性を向上させることができる
が、その反面寿命が短かくなる欠点を生じる。 In a high-pressure sodium lamp with such a configuration, by increasing the temperature of the arc tube, it is possible to increase the vapor pressure of the enclosed luminescent metal sodium, broaden the emission spectral range, and improve color rendering. On the other hand, it has the disadvantage of shortening its life.
この原因は上記ガラスソルダが酸化アルミニウ
ムAl2O3、酸化カルシウムCaOが主成分とし、こ
れに小量の酸化マグネシウムMgo、酸化バリウ
ムBaO等を加えたものが一般に使用されるため、
発光管内に露出するガラスソルダの主成分の一つ
であるCaOと封入発光金属であるナトリウムNa
とが接触し、温度の上昇につれて両者は徐々に反
応して遂には封止部であるガラスソルダにクラツ
クを生じリークすることによつてランプが点灯し
なくなることにある。 The reason for this is that the above-mentioned glass solder mainly consists of aluminum oxide Al 2 O 3 and calcium oxide CaO, with small amounts of magnesium oxide Mgo, barium oxide BaO, etc.
CaO, which is one of the main components of the glass solder exposed inside the arc tube, and sodium Na, which is the encapsulated luminescent metal
As the temperature rises, the two gradually react with each other, and the glass solder that serves as the sealing part eventually cracks and leaks, causing the lamp to no longer light up.
本発明は上記従来の欠点に対処してなされたも
ので、封着材であるガラスソルダと封入発光金属
のナトリウムなどのアルカリ金属との反応を防止
して長寿命の金属蒸気放電灯を提供することを目
的とする。
The present invention has been made to address the above-mentioned conventional drawbacks, and provides a long-life metal vapor discharge lamp by preventing the reaction between glass solder, which is a sealing material, and an alkali metal such as sodium, which is an encapsulated luminescent metal. The purpose is to
本発明は内部に少なくとも発光金属としてアル
カリ金属を封入した透光性セラミクス管からなる
発光管バルブの管端部をガラスソルダを介して閉
塞体で封止した発光管を備え、上記ガラスソルダ
の発光管内露出部をアルミナと希土類金属酸化物
との混合組成物の焼結体（焼成物）で被覆したア
ルカリ金属蒸気放電灯である。
The present invention is provided with an arc tube in which the tube end of the arc tube bulb is made of a translucent ceramic tube in which at least an alkali metal is sealed as a luminescent metal, and the tube end of the bulb is sealed with a closing body through a glass solder. This is an alkali metal vapor discharge lamp in which the exposed inside of the tube is coated with a sintered body (fired product) of a mixed composition of alumina and rare earth metal oxide.
以下、本発明の詳細を図示の実施例を参照して
説明する。第１図は400W高圧ナトリウムランプ
発光管の一端側の縦断面図を示し、１は透光性セ
ラミクスたとえば高密度多結晶体のアルミナセラ
ミクスからなる長さ約110mm、内径約７mmの発光
管バルブ、２は耐熱性金属たとえばニオブからな
る閉塞体で、酸化カルシウムCaOおよび酸化アル
ミニウムAl2O3を主成分とするガラスソルダたと
えば重量比でCaO38.5％、Al2O354.0％および
MgO7.5％からなるガラスソルダ３を介して発光
管バルブ１の開口端部を封止している。４は耐熱
性金属管たとえばニオブ管からなる排気管を兼ね
る電流導入体で閉塞体２の中心部を溶接などの手
段で気密に貫通し、その内端部には電極５を支持
している。さらに、上記ガラスソルダ３の発光管
内露出部３ａはモル比で85〜75：15〜25の酸化ア
ルミニウムと希土類金属酸化物たとえば酸化イツ
トリウムとで焼結形成された保護層６で被覆され
ている。そして発光管バルブ１の内部には不活性
ガスたとえばキセノンとナトリウム−水銀アマル
ガムが封止され発光管が形成されている。
The details of the invention will be explained below with reference to the illustrated embodiments. FIG. 1 shows a vertical cross-sectional view of one end of the arc tube of a 400W high-pressure sodium lamp, in which 1 is an arc tube bulb made of translucent ceramics, such as high-density polycrystalline alumina ceramics, with a length of about 110 mm and an inner diameter of about 7 mm; 2 is a blocker made of a heat-resistant metal such as niobium, and a glass solder containing calcium oxide CaO and aluminum oxide Al 2 O 3 as main components, such as CaO 38.5%, Al 2 O 3 54.0% and
The open end of the arc tube bulb 1 is sealed via a glass solder 3 made of 7.5% MgO. Reference numeral 4 denotes a current introduction member made of a heat-resistant metal pipe, such as a niobium pipe, which also serves as an exhaust pipe, which passes through the center of the closure body 2 in an airtight manner by means of welding or the like, and supports an electrode 5 at its inner end. Further, the exposed portion 3a of the glass solder 3 in the arc tube is covered with a protective layer 6 formed by sintering aluminum oxide and a rare earth metal oxide such as yttrium oxide in a molar ratio of 85 to 75:15 to 25. The interior of the arc tube bulb 1 is sealed with an inert gas such as xenon and sodium-mercury amalgam to form an arc tube.
この発光管は始動電圧を低下させるために、た
とえば外表面に近接導体を付設し、さらに熱応動
スイツチ式始動装置を発光管と並列に接続して外
管内に収納し高演色形高圧ナトリウムランプがで
きあがる。 In order to lower the starting voltage of this arc tube, for example, a nearby conductor is attached to the outer surface, and a thermally responsive switch-type starter is connected in parallel with the arc tube and housed inside the outer bulb. It's done.
このように構成されたランプは高演色形なるが
故に点灯時の発光管管端部の最冷部温度は一般形
のものに比較してより高温となるから、当然封止
部のガラスソルダ３部もそれにつれてより昇温さ
れて封入発光金属のナトリウムとの反応が促進さ
れるところであるが、上記のようにガラスソルダ
３の発光管内露出部３ａは耐ナトリウム性の酸化
アルミニウムと酸化イツトリウムとで形成された
保護層６で完全に被覆されているのでナトリウム
との反応は防止でき、したがつて気密封止部にク
ラツクを生じてリークしランプが点灯しなくなる
ような事故は発生しない。ちなみに、このような
ランプ10本につき寿命試験を実施した結果、
15000時間点灯しても上記事故を発生したものは
なかつた。しかも上記保護層６はガラスソルダ３
より融点が高いので、ランプ点灯中に溶融してガ
ラスソルダ３が露出するようなことはないし、さ
らにガラスソルダ３に対する密着性にも優れてい
るので振動等により剥離することもない。 Since the lamp configured in this way has a high color rendering type, the temperature of the coldest part at the end of the arc tube when lit is higher than that of a general lamp, so naturally the glass solder 3 of the sealing part As the temperature increases, the reaction between the sealed luminescent metal and the sodium is promoted, but as mentioned above, the exposed part 3a of the glass solder 3 inside the arc tube is made of sodium-resistant aluminum oxide and yttrium oxide. Since it is completely covered with the formed protective layer 6, reaction with sodium can be prevented, and therefore accidents such as cracks in the hermetic sealing part causing leakage and the lamp not lighting will not occur. By the way, as a result of conducting a lifespan test on 10 such lamps,
Even after 15,000 hours of lighting, none of the above accidents occurred. Moreover, the protective layer 6 is made of glass solder 3.
Since it has a higher melting point, it will not melt and expose the glass solder 3 while the lamp is on, and it also has excellent adhesion to the glass solder 3, so it will not peel off due to vibration or the like.
次に上記発光管の製造方法の一例を第２図を参
照して説明する。第２図は第１図に示した発光管
の管端封止部の製造工程の説明図で、内端部に電
極５を支持したニオブ管からなる電流導入体４を
あらかじめニオブ製の閉塞体２の中心部を気密に
貫通するように溶接して固着し、このものを発光
管バルブ１の開口端部に適当な支持具（図示しな
い。）で支持し、上記発光管バルブ１の管端端面
と閉塞体２の内面とであらかじめガラスソルダ紛
末を圧縮成形してなるリング状ガラスソルダ３Ａ
を挾着させ、さらにこのリング状ガラスソルダ３
Ａの内周面に位置するようにこれもまたあらかじ
め圧縮成形した酸化アルミニウムと酸化イツトリ
ウムとからなるリング状混合物６Ａを配置する。
このように配置したものを真空または不活性ガス
中で1400〜1500℃程度に加熱すれば、まずリング
状ガラスソルダ３Ａは溶融して発光管バルブ１と
閉塞体２との間隙に流入し冷却固化して両者を気
密に封止する。次にレーザ光線または電子ビーム
等によりリング状混合物６Ａを1760〜1800℃程度
で集中的に加熱する。この加熱は可能な限り短時
間で行ない、先に密封したガラスソルダ３ができ
るだけ溶融流出しないようにすることが望まし
い。このような工程を経ることによつて上記リン
グ状混合物６Ａは溶融してガラスソルダの管内露
出部３ａ表面を密着被覆する保護層６を形成す
る。 Next, an example of a method for manufacturing the above-mentioned arc tube will be explained with reference to FIG. 2. FIG. 2 is an explanatory diagram of the manufacturing process of the tube end sealing part of the arc tube shown in FIG. The central part of the arc tube bulb 1 is welded and fixed so as to penetrate airtightly, and this is supported at the open end of the arc tube bulb 1 with a suitable support (not shown). Ring-shaped glass solder 3A formed by compression-molding glass solder powder in advance on the end face and the inner surface of the closure body 2
This ring-shaped glass solder 3
A ring-shaped mixture 6A made of aluminum oxide and yttrium oxide, which has also been compression-molded in advance, is placed on the inner peripheral surface of A.
When this arrangement is heated to about 1400 to 1500°C in a vacuum or inert gas, the ring-shaped glass solder 3A first melts and flows into the gap between the arc tube bulb 1 and the closing body 2, where it cools and solidifies. to airtightly seal both. Next, the ring-shaped mixture 6A is intensively heated to about 1760 to 1800°C using a laser beam, an electron beam, or the like. It is desirable to carry out this heating in as short a time as possible to prevent the previously sealed glass solder 3 from melting and flowing out as much as possible. Through these steps, the ring-shaped mixture 6A is melted to form a protective layer 6 that tightly covers the surface of the exposed portion 3a of the glass solder inside the tube.
第３図は他の実施例すなわち発光管内封入の発
光金属ナトリウムをハロゲン化物として封入した
メタルハライドランプの発光管の一端部を示す。
図において１は透光性アルミナセラミクスからな
る発光管バルブ、２Ａはセラミクスたとえばアル
ミナセラミクスからなる閉塞体、３は上記発光管
バルブ１の端部と閉塞体２との間に介在する気密
封着材のガラスソルダで、CaO、Al2O3を主成分
としてこれにMgOを加えたものからなる。４Ａ
は耐熱性金属線たとえばニオブ線からなる電流導
入体で閉塞体２Ａの中心部を上記と同質のガラス
ソルダ３を介して気密に貫通し、その内端部には
電極５を支持している。また、上記２個所のガラ
スソルダ３，３の各発光管内露出部３Ａはモル比
で60〜40：40〜60の酸化アルミニウムと希土類金
属酸化物たとえば酸化スカンジウムとの焼結体で
形成された保護層６でそれぞれ被覆されている。
そして発光管バルブ内にはアルゴン、水銀および
金属ハロゲン化物としてたとえばよう化ナトリウ
ムとよう化スカンジウムが封入され発光管が形成
されている。この発光管は通常内部を真空にする
かまたは窒素ガスを封入した外管内に収納してメ
タルハライドランプができあがる。 FIG. 3 shows one end of the arc tube of another embodiment, that is, a metal halide lamp in which the luminescent metal sodium is sealed in the arc tube as a halide.
In the figure, 1 is an arc tube bulb made of translucent alumina ceramics, 2A is a closing body made of ceramics such as alumina ceramics, and 3 is an airtight sealing material interposed between the end of the arc tube bulb 1 and the closure body 2. This is a glass solder consisting of CaO and Al 2 O 3 as the main components, with MgO added to them. 4A
A current introducing body made of a heat-resistant metal wire, such as a niobium wire, passes airtight through the center of the closing body 2A via a glass solder 3 of the same quality as above, and supports an electrode 5 at its inner end. In addition, the exposed portions 3A of the glass solders 3, 3 in the arc tube at the two locations above are protected by a sintered body of aluminum oxide and rare earth metal oxide, such as scandium oxide, in a molar ratio of 60 to 40:40 to 60. Each is coated with a layer 6.
The arc tube bulb is filled with argon, mercury, and metal halides such as sodium iodide and scandium iodide to form an arc tube. This arc tube is usually housed inside an outer tube that is evacuated or filled with nitrogen gas to complete a metal halide lamp.
このような構成のランプは一般のメタルハライ
ドランプが発光管バルブとして石英ガラスを使用
しているのに対しセラミクスを使用したので発光
管温度をより高温に昇温させることができ、それ
によつて封入金属ハロゲン化物の蒸気圧を高め発
光効率ならびに演色性を一層向上させることがで
き、しかも高温になることにより発光金属のナト
リウムとの反応が一層懸念されるガラスソルダ３
の管内露出部は、耐ナトリウム性、耐ハロゲン性
に優れる上記保護層６で完全に被覆されているか
ら、ナトリウムは勿論のことハロゲンとの反応も
防止することができ、したがつて気密封止部にク
ラツクを生じてリークしランプが不点となるよう
な事故は発生せず、先の実施例と同様の効果が得
られた。 Unlike ordinary metal halide lamps, which use quartz glass as the arc tube bulb, lamps with this structure use ceramics, which allows the arc tube temperature to be raised to a higher temperature, thereby increasing the temperature of the enclosed metal. Glass solder 3 that can increase the vapor pressure of halides to further improve luminous efficiency and color rendering properties, and is even more likely to react with the luminescent metal sodium due to high temperatures.
The exposed inside of the tube is completely covered with the above-mentioned protective layer 6, which has excellent sodium resistance and halogen resistance, so it is possible to prevent reactions not only with sodium but also with halogens, thus ensuring airtight sealing. There were no accidents such as cracks in the parts causing leaks and malfunctioning of the lamps, and the same effects as in the previous embodiments were obtained.
なお、ガラスソルダ３は上記組成の物に限ら
ず、通常この種の封着材として用いられるCaO、
Al2O3を主成分としこれにMgO、BaO、Y2O3、
SrO、B2O3などの一種以上を加えた物を使用す
ることができるし、また、発光管内に封入する発
光金属としてはナトリウム以外の他のアルカリ金
属たとえばカリウム、リチウムあるいはそれ等金
属のハロゲン化物を使用した場合でも同様の効果
が得られるものである。 Note that the glass solder 3 is not limited to the one having the above composition, but can also be made of CaO, which is usually used as this type of sealing material.
The main component is Al 2 O 3 , which also contains MgO, BaO, Y 2 O 3 ,
It is possible to use a material containing one or more of SrO, B 2 O 3 , etc. Also, as the luminescent metal sealed in the arc tube, other alkali metals other than sodium such as potassium, lithium, or halogens of these metals can be used. A similar effect can be obtained even when a compound is used.
さらに上記保護層６の一成分として使用される
希土類金属酸化物としては上記実施例以外の酸化
ランタン、酸化ネオジム、酸化コーロピウム、酸
化ジスプロシウム、酸化ホルミウム、酸化ツリウ
ム、および酸化エルビウム等でもよいし、またこ
れ等保護層は単に酸化アルミニウムと希土類金属
酸化物とを塗布しただけでは効果がなく、焼成す
ることによつてガラスソルダ３の露出部に密着し
た層を形成することができるのであつて、この焼
成時に保護層６を形成する両成分に焼結乃至焼成
により固溶体を形成するかあるいは希土類金属の
アルミン酸塩を生成するものと考察される。 Furthermore, the rare earth metal oxide used as a component of the protective layer 6 may be lanthanum oxide, neodymium oxide, colopium oxide, dysprosium oxide, holmium oxide, thulium oxide, erbium oxide, etc. other than the above examples, or These protective layers are not effective just by coating aluminum oxide and rare earth metal oxide, but by baking, it is possible to form a layer that tightly adheres to the exposed part of the glass solder 3. It is considered that during sintering, both components forming the protective layer 6 form a solid solution or form a rare earth metal aluminate by sintering or firing.
以上詳述したように、本発明によれば発光金属
として少なくともアルカリ金属を封入した発光管
の封止部に使用されるガラスソルダの発光管内露
出部を酸化アルミニウムと希土類金属酸化物とで
形成された保護層で被覆するようにしたので、上
記ガラスソルダが封入アルカリ金属と反応してク
ラツクを発生するような事故を防止して長寿命と
することができる。
As described in detail above, according to the present invention, the exposed portion inside the arc tube of the glass solder used for the sealing part of the arc tube filled with at least an alkali metal as a luminescent metal is formed of aluminum oxide and rare earth metal oxide. Since the glass solder is coated with a protective layer, it is possible to prevent an accident in which the glass solder reacts with the encapsulated alkali metal and cause a crack, thereby extending the life of the glass solder.
第１図は本発明の一実施例である高圧ナトリウ
ムランプの発光管の一端縦断面図、第２図は同じ
く発光管の製造工程の説明図、第３図は他の実施
例であるメタルハライドランプの発光管の一端縦
断面図をそれぞれ示す。
１……発光管バルブ、２……閉塞体、３……ガ
ラスソルダ、３ａ……ガラスソルダの発光管内露
出部、６……保護層。
Fig. 1 is a longitudinal sectional view of one end of the arc tube of a high-pressure sodium lamp that is an embodiment of the present invention, Fig. 2 is an explanatory diagram of the manufacturing process of the arc tube, and Fig. 3 is a metal halide lamp that is another embodiment of the invention. Fig. 2 shows a vertical cross-sectional view of one end of the arc tube. DESCRIPTION OF SYMBOLS 1... Arc tube bulb, 2... Closure body, 3... Glass solder, 3a... Exposed portion of glass solder inside arc tube, 6... Protective layer.
Claims (1)
属を封入した透光性セラミクス管からなる発光管
バルブの管端部をガラスソルダを介して閉塞体で
封止した発光管を備え、上記ガラスソルダの発光
管内露出部がアルミナ希と土類金属酸化物との焼
結体からなる保護層で被覆されていることを特徴
とするアルカリ金属蒸気放電灯。1 Equipped with an arc tube made of a translucent ceramic tube in which at least an alkali metal as a luminescent metal is sealed inside the arc tube bulb, the tube end of which is sealed with a closure via a glass solder, and the glass solder is exposed inside the arc tube. An alkali metal vapor discharge lamp characterized in that a portion of the lamp is covered with a protective layer made of a sintered body of rare alumina and an earth metal oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20590783A JPS60100358A (en) | 1983-11-04 | 1983-11-04 | Alkaline metal vapor discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20590783A JPS60100358A (en) | 1983-11-04 | 1983-11-04 | Alkaline metal vapor discharge lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60100358A JPS60100358A (en) | 1985-06-04 |
| JPH0339382B2 true JPH0339382B2 (en) | 1991-06-13 |
Family
ID=16514725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20590783A Granted JPS60100358A (en) | 1983-11-04 | 1983-11-04 | Alkaline metal vapor discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60100358A (en) |
-
1983
- 1983-11-04 JP JP20590783A patent/JPS60100358A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60100358A (en) | 1985-06-04 |
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