JPH11260315A - Closing part structure body of tubular lamp - Google Patents
Closing part structure body of tubular lampInfo
- Publication number
- JPH11260315A JPH11260315A JP6928498A JP6928498A JPH11260315A JP H11260315 A JPH11260315 A JP H11260315A JP 6928498 A JP6928498 A JP 6928498A JP 6928498 A JP6928498 A JP 6928498A JP H11260315 A JPH11260315 A JP H11260315A
- Authority
- JP
- Japan
- Prior art keywords
- electrode core
- powder
- closed
- part structure
- center hole
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、水銀ランプやメタ
ルハライドランプ、ハロゲンランプなどの管球の閉塞管
を閉塞する閉塞部構造体に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed structure for closing a closed tube of a bulb such as a mercury lamp, a metal halide lamp, and a halogen lamp.
【０００２】[0002]
【従来の技術】管球、例えば高圧放電ランプは、石英ガ
ラス製の球状や楕円球状をした発光管内に一対の電極が
対向配置され、水銀などの発光金属、放電用ガスなどが
封入される。そして、発光管の端部に筒状の閉塞管が連
設され、先端に電極を有する電極芯棒と外部リード棒が
この閉塞管で電気的に接続された状態で閉塞されるが、
タングステンからなる電極芯棒と石英ガラス製の閉塞管
は熱膨張率が大きく異なるために閉塞管を電極芯棒に直
接溶着して閉塞することができない。2. Description of the Related Art In a bulb, for example, a high-pressure discharge lamp, a pair of electrodes are opposed to each other in a spherical or elliptical spherical arc tube made of quartz glass, and a luminous metal such as mercury and a discharge gas are sealed therein. Then, a tubular blocking tube is continuously provided at the end of the arc tube, and the electrode core rod having an electrode at the tip and the external lead bar are closed in a state where they are electrically connected by the closing tube.
Since the electrode core rod made of tungsten and the closed tube made of quartz glass have greatly different coefficients of thermal expansion, the closed tube cannot be closed by directly welding to the electrode core bar.
【０００３】このため従来は箔シール法や段繋ぎ法など
で閉塞していたが、最近では、シリカなどの非導電性無
機物質成分とモリブデンなどの導電性無機物質成分で成
形された傾斜機能材料を焼結法で円柱状に形成した閉塞
部構造体で発光管端部の閉塞管を閉塞することが注目さ
れている。かかる傾斜機能材料で形成された閉塞部構造
体は、一方の端部はシリカなどの非導電性無機物質成分
がリッチであり、他方の端部に向かうにつれてモリブデ
ンなどの導電性無機物質成分の割合が連続的に、または
段階的に増加するものである。従って、シリカ粉末とモ
リブデン粉末で成形された傾斜機能材料の場合、閉塞部
構造体の一方の端部近傍は、非導電性であるとともに熱
膨張率が石英ガラスの熱膨張率に近く、他方の端部近傍
は、導電性であるとともに熱膨張率がモリブデンの熱膨
張率に近い特性を有する。[0003] For this reason, a conventional functionally graded material formed of a non-conductive inorganic material component such as silica and a conductive inorganic material component such as molybdenum has recently been closed by a foil sealing method or a step joining method. Attention has been focused on closing a closed tube at the end of the arc tube with a closed portion structure formed by sintering into a cylindrical shape. The closed part structure formed of such a functionally graded material has a non-conductive inorganic substance component such as silica at one end thereof rich, and a proportion of a conductive inorganic substance component such as molybdenum toward the other end. Increases continuously or stepwise. Therefore, in the case of a functionally graded material formed of silica powder and molybdenum powder, the vicinity of one end of the closed structure is non-conductive and has a coefficient of thermal expansion close to that of quartz glass, and the other is close to quartz glass. The vicinity of the end portion is electrically conductive and has a characteristic that the coefficient of thermal expansion is close to that of molybdenum.
【０００４】かかる傾斜機能材料は、非導電性無機物質
成分と導電性無機物質成分の割合が変化する勾配を大き
くすることができるので、傾斜機能材料で形成された閉
塞部構造体は、軸線方向の長さが短くても、一方の端面
の非導電性成分をリッチにするとともに他方の端面の導
電性成分をリッチにすることができる。また、傾斜機能
材料はその構成成分の組成が大きく変わる境界面を持た
ないので熱ショックや機械的強度が強い。従って、閉塞
管に閉塞部構造体を溶着するシール部分を点灯時に高温
になる発光管の中央部に近づけることができ、閉塞管の
軸線方向の長さが短いことと相俟って、閉塞管を短くで
きる利点を有する。[0004] Such a functionally graded material can increase the gradient at which the ratio between the non-conductive inorganic substance component and the conductive inorganic substance component changes. Even if the length is short, the non-conductive component on one end face can be made rich and the conductive component on the other end face can be made rich. In addition, since the functionally graded material does not have a boundary surface where the composition of the constituents changes greatly, heat shock and mechanical strength are strong. Therefore, the sealing portion for welding the closing portion structure to the closing tube can be brought close to the central portion of the arc tube, which becomes hot at the time of lighting, and the length of the closing tube in the axial direction is short. Has the advantage that it can be shortened.
【０００５】図１は、発光管に連設された閉塞管を傾斜
機能材料からなる閉塞部構造体で閉塞した定格電力が３
ｋＷのキセノンショートアークランプを示す。石英ガラ
ス製の発光管１１は球状や楕円球状の中央部を有してお
り、その内部には、タングステンからなる陽極２０と陰
極３０が、例えば５ｍｍ間隔で対向配置されている。ま
た、放電用ガスとしてキセノンガスが所定圧力で封入さ
れている。そして、発光管１１の両端に閉塞管１２，１
２が連設されているが、閉塞管１２，１２の端部は、導
電性無機物質成分（例えばモリブデン）と非導電性無機
物質成分（例えばシリカ）からなる傾斜機能材料の焼結
体である閉塞部構造体５０で閉塞されている。[0005] Fig. 1 shows that a closed tube connected to an arc tube is closed by a closed structure made of a functionally graded material and has a rated power of 3.
2 shows a kW xenon short arc lamp. The arc tube 11 made of quartz glass has a spherical or elliptical spherical central portion, in which an anode 20 and a cathode 30 made of tungsten are opposed to each other at intervals of, for example, 5 mm. Xenon gas is sealed at a predetermined pressure as a discharge gas. The closed tubes 12, 1 are provided at both ends of the arc tube 11, respectively.
2, the ends of the closed tubes 12, 12 are sintered bodies of a functionally gradient material composed of a conductive inorganic material component (for example, molybdenum) and a non-conductive inorganic material component (for example, silica). It is closed by the closing portion structure 50.
【０００６】閉塞部構造体５０は、非導電性の端面５１
が発光管１１方向になるように、閉塞管１２内に嵌め込
まれ、この端面５１の部分で石英ガラス製の閉塞管１２
に溶着される。閉塞部構造体５０は、その両端面５１，
５２からそれぞれ、電気電導性を有する部分まで非貫通
の中心孔５３があけられ、それぞれの中心孔５３に陽極
２０および陰極３０の電極芯棒４０と陽極端子２２およ
び陰極端子３２を埋設して固定している。[0006] The closing structure 50 includes a non-conductive end face 51.
Is inserted into the closed tube 12 so as to face the arc tube 11.
Welded to. The closing part structure 50 has two end faces 51,
Non-penetrating center holes 53 are formed from 52 to the electrically conductive portions, respectively, and the electrode core rods 40 of the anode 20 and the cathode 30 and the anode terminal 22 and the cathode terminal 32 are embedded and fixed in the respective center holes 53. doing.
【０００７】傾斜機能材料からなる閉塞部構造体５０へ
の電極芯棒４０の固定は、シリカとモリブデンの粉末の
加圧成形体を１３００℃程度の温度で仮焼結して円柱体
を成形し、この円柱体の非導電性の端面５１から中心孔
５３を加工し、この中心孔５３に電極芯棒４０を挿入し
てから１７００℃程度で本焼結し、焼き締めることによ
って行われる。The fixing of the electrode core rod 40 to the closed part structure 50 made of a functionally graded material is performed by temporarily sintering a compact of silica and molybdenum powder at a temperature of about 1300 ° C. to form a cylindrical body. A center hole 53 is formed from the non-conductive end face 51 of the cylindrical body, the electrode core rod 40 is inserted into the center hole 53, and thereafter, the main body is sintered at about 1700 ° C. and sintered.
【０００８】[0008]
【発明が解決しようとする課題】ここで、中心孔５３を
内径が均一な孔にしておくと、つまり、電極芯棒４０が
閉塞部構造体５０の中心孔５３内に隙間なく焼き締めら
れるようにすると、電極芯棒４０がタングステンやモリ
ブデン等の金属であるので、焼結時に、傾斜機能材料の
モリブデン成分が少なくてシリカ成分が多い非導電性領
域においては、熱膨張率の差によって、中心孔５３に面
した部分にクラックが入り、ランプ製作後にそのクラッ
ク部分から割れが広がり、リークにいたる事故が起る。Here, when the center hole 53 is a hole having a uniform inner diameter, that is, the electrode core rod 40 is firmly tightened in the center hole 53 of the closing portion structure 50 without any gap. In this case, since the electrode core rod 40 is made of a metal such as tungsten or molybdenum, the center of the non-conductive region in which the molybdenum component of the functionally gradient material is low and the silica component is high due to the difference in the coefficient of thermal expansion during sintering. A crack is formed in the portion facing the hole 53, and after the lamp is manufactured, cracks spread from the cracked portion, causing an accident leading to a leak.
【０００９】この事故を防止するために、閉塞部構造体
５０の中心孔５３を、電極芯棒４０とほぼ同径の孔５３
ａとこれよりも大径の孔５３ｂからなる二段孔とし、電
極芯棒４０は、本焼結時に導電性領域側の孔５３ａにお
いて焼き締められるが、非導電性領域側の大径の孔５３
ｂの部分において、電極芯棒４０と閉塞部構造体５０の
間に隙間Ｓができるようにしている。In order to prevent this accident, the central hole 53 of the closing part structure 50 is formed with a hole 53 having substantially the same diameter as the electrode core rod 40.
a and a hole 53b having a larger diameter than this, the electrode core rod 40 is tightened in the hole 53a on the conductive region side during the main sintering, but the large diameter hole on the non-conductive region side. 53
A gap S is formed between the electrode core bar 40 and the closed part structure 50 in the portion b.
【００１０】しかしながら、電極芯棒４０と閉塞部構造
体５０の間に隙間Ｓができると、点灯時において、ラン
プ内空間の最冷点は、電極２０，３０から遠く離れたこ
の隙間Ｓ内に位置することになる。従って、メタルハラ
イドランプや水銀ランプにおいては、金属ハロゲンや水
銀などの封入物が、最冷点である隙間Ｓに凝縮する過程
で、経時的な発光色の変化が生じるなど所期のランプ特
性が得られない不具合が生じる。However, if a gap S is formed between the electrode core bar 40 and the closed part structure 50, the coldest point in the lamp interior space will be within this gap S far away from the electrodes 20, 30 during lighting. Will be located. Accordingly, in a metal halide lamp or a mercury lamp, desired lamp characteristics such as a change in luminescent color with the passage of time during the process in which an enclosure such as a metal halide or mercury condenses in the gap S, which is the coldest point, are obtained. Unavailable trouble occurs.
【００１１】そこで本発明は、傾斜機能材料からなる閉
塞部構造体において、電極芯棒が閉塞部構造体の中心孔
内に隙間なく焼き締められて、電極芯棒と閉塞部構造体
の間に最冷点である隙間が形成されないようにしても、
焼結時にクラックの入ることのない閉塞部構造体を提供
することを目的とする。Therefore, the present invention provides a closed part structure made of a functionally graded material, in which an electrode core rod is tightened tightly in a center hole of the closed part structure without a gap, and a gap between the electrode core rod and the closed part structure is provided. Even if the gap that is the coldest point is not formed,
An object of the present invention is to provide a closed part structure that does not crack during sintering.
【００１２】[0012]
【課題を解決するための手段】かかる目的を達成するた
めに、請求項１の発明は、導電性無機物質成分と非導電
性無機物質成分とが長手方向に連続的または段階的な濃
度勾配を持ち、一方側が非導電性領域であって他方側が
導電性領域である略円柱状の傾斜機能材料で構成され、
その中心孔に電極芯棒を焼き締めて保持した状態で、発
光管に連設された閉塞管を閉塞する管球の閉塞部構造体
において、電極芯棒を閉塞部構造体の中心孔内に隙間な
く焼き締め、少なくとも閉塞部構造体の導電性無機物質
成分非含有領域の中心孔に位置する電極芯棒の表面に高
融点金属薄膜を被覆し、少なくとも閉塞部構造体の導電
性無機物質成分含有領域の中心孔に位置する電極芯棒の
表面には高融点金属粉末を塗布する。In order to achieve the above object, according to the first aspect of the present invention, a conductive inorganic material component and a non-conductive inorganic material component form a continuous or stepwise concentration gradient in the longitudinal direction. Having a substantially cylindrical functionally graded material in which one side is a non-conductive area and the other side is a conductive area,
In a state in which the electrode core rod is baked and held in the center hole, the electrode core rod is inserted into the center hole of the closing part structure in the closed part structure of the bulb for closing the closed tube connected to the arc tube. Baking without gaps, at least covering the surface of the electrode core bar located at the center hole of the conductive inorganic material component-free region of the closed part structure with a high melting point metal thin film, at least the conductive inorganic substance component of the closed part structure High melting point metal powder is applied to the surface of the electrode core bar located in the center hole of the containing region.
【００１３】そして、請求項２の発明のように、電極芯
棒の表面に被覆する高融点金属薄膜は白金もしくはレニ
ウムもしくはロジウムのめっき被膜が好適であり、電極
芯棒の表面に塗布する高融点金属粉末はモリブデン粉
末、タングステン粉末、タンタル粉末、バナジウム粉
末、ジルコニウム粉末、ニオブ粉末のいずれか一種ある
いは二種以上の混合金属粉末が好適である。The high melting point metal thin film coated on the surface of the electrode core rod is preferably a platinum, rhenium or rhodium plating film. As the metal powder, any one of molybdenum powder, tungsten powder, tantalum powder, vanadium powder, zirconium powder, and niobium powder, or a mixed metal powder of two or more kinds is preferable.
【００１４】[0014]
【発明の実施の形態】以下に、図面に基づいて本発明の
実施の形態を具体的に説明する。図２において、発光管
１１に連設された閉塞管１２は、閉塞部構造体５０で閉
塞されている。閉塞部構造体５０は非導電性無機物質成
分であるシリカと導電性無機物質成分であるモリブデン
からなる傾斜機能材料製であり、湿式法あるいはプレス
法にて製造されている。Embodiments of the present invention will be specifically described below with reference to the drawings. In FIG. 2, a closed tube 12 connected to the arc tube 11 is closed by a closed structure 50. The closing part structure 50 is made of a functionally gradient material composed of silica as a non-conductive inorganic substance component and molybdenum as a conductive inorganic substance component, and is manufactured by a wet method or a press method.
【００１５】湿式法は、粒度分布の異なるシリカ粉末と
モリブデン粉末の混合スラリーを調製し、混合スラリー
を遠心分離または沈降分離して、溶媒を除いた後に泥滓
を脱水し、乾燥して冷間静水圧成形などでつくる方法で
あり、傾斜機能材料の長さ方向において非常になだらか
な組成変化が得られる製造方法である。In the wet method, a mixed slurry of silica powder and molybdenum powder having different particle size distributions is prepared, and the mixed slurry is subjected to centrifugal separation or sedimentation separation. This is a method of making by isostatic pressing or the like, and is a manufacturing method capable of obtaining a very gentle composition change in the length direction of the functionally gradient material.
【００１６】プレス法は、シリカ粉末とモリブデン粉末
の混合割合が異なった混合粉末体を複数種類用意し、そ
れぞれの混合粉末体を有機バインダーを含む溶剤ととも
に湿式混合した後、乾燥して造粒粉末を作成し、この造
粒した粉末を混合割合順に金型に層状に充填し、加圧し
て加圧して成形体を得た後、この成形体を加熱して有機
バインダーを除去してから焼成する方法である。In the pressing method, a plurality of types of mixed powders having different mixing ratios of silica powder and molybdenum powder are prepared, each mixed powder is wet-mixed with a solvent containing an organic binder, and then dried to form a granulated powder. Is prepared, and the granulated powder is filled into a mold in the form of a mixture in the form of a layer, pressed and pressed to obtain a molded body, and then the molded body is heated to remove the organic binder and then fired. Is the way.
【００１７】上記のような方法で製造された傾斜機能材
料を、所定の寸法の円柱体に成形して１３００℃程度の
温度で仮焼結した後、非導電性端面から中心孔５３を導
電性領域の所定位置まで加工する。中心孔５３は、内径
が電極芯棒４０とほぼ同径の一段孔であり、電極芯棒４
０を挿入したときに、隙間がほとんどできないようにな
っている。The functionally graded material manufactured by the above-described method is formed into a cylindrical body having a predetermined size, and is temporarily sintered at a temperature of about 1300 ° C., and then the center hole 53 is formed from the non-conductive end face with the conductive material. Processing to a predetermined position in the area. The center hole 53 is a single-step hole having an inner diameter substantially equal to that of the electrode core rod 40.
When 0 is inserted, a gap is hardly formed.
【００１８】次に、電極芯棒４０の表面に、図２におい
て、便宜上点線で示す高融点金属の薄膜７０をめっき
法、スパッタリング法、真空蒸着法などで形成する。薄
膜７０を形成する部位は、少なくとも、電極芯棒４０を
中心孔５３に挿入したときに、傾斜機能材料の導電性無
機物質成分非含有領域、つまり、閉塞部構造体５０の非
導電側端部であって、モリブデンを含有しないシリカの
みの領域に対面する位置である。しかし、高融点金属の
薄膜７０をこれ以外の部位、つまりモリブデンを含有す
る領域にまで余分に形成してもなんら差支えない。Next, a thin film 70 of a high melting point metal is formed on the surface of the electrode core rod 40 by a plating method, a sputtering method, a vacuum deposition method, or the like, which is indicated by a dotted line in FIG. 2 for convenience. At least the region where the thin film 70 is formed is a region where the conductive inorganic material component of the functionally gradient material is not contained, that is, the non-conductive side end of the closed structure 50 when the electrode core bar 40 is inserted into the center hole 53. At a position facing a region of only silica containing no molybdenum. However, the thin film 70 of the high melting point metal may be formed extra in other portions, that is, even in the region containing molybdenum.
【００１９】薄膜７０用の高融点金属は、傾斜機能材料
の本焼結温度によって溶融しないことが必要であるが、
白金（Ｐｔ）もしくはレニウム（Ｒｅ）もしくはロジウ
ム（Ｒｈ）が好適であり、更にはめっき法で形成した膜
厚が１μｍ程度のレニウムもしくはロジウムのめっき薄
膜とするのがよい。The high melting point metal for the thin film 70 must not be melted by the main sintering temperature of the functionally graded material.
Platinum (Pt), rhenium (Re), or rhodium (Rh) is preferable, and a rhenium or rhodium plating thin film formed by a plating method and having a thickness of about 1 μm is preferable.
【００２０】続いて、電極芯棒４０の表面に、図２にお
いて、便宜上、小さな×印で示す高融点金属粉末６０を
塗布する。高融点金属粉末６０を塗布する部位は、少な
くとも、電極芯棒４０を中心孔５３に挿入したときに、
傾斜機能材料の導電性無機物質成分含有領域、つまりモ
リブデンを含有する領域に対面する位置であって、傾斜
機能材料と電極芯棒４０の熱膨張率の差の大きい位置で
ある。Subsequently, a high melting point metal powder 60 indicated by a small X in FIG. 2 is applied to the surface of the electrode rod 40 for convenience. The portion to which the high melting point metal powder 60 is applied is at least when the electrode core rod 40 is inserted into the center hole 53.
This is a position facing the conductive inorganic material component-containing region of the functionally gradient material, that is, the region containing molybdenum, where the difference in the coefficient of thermal expansion between the functionally gradient material and the electrode core 40 is large.
【００２１】高融点金属粉末６０は傾斜機能材料の本焼
結温度によって溶融しないことが必要である。モリブデ
ン粉末、タングステン粉末、タングステン粉末、タンタ
ル粉末、バナジウム粉末、ジルコニウム粉末、ニオブ粉
末のいずれか一種あるいは二種以上の混合金属粉末は、
高融点であって本焼結時に溶解、飛散、合金化などの変
化が起ることがなく、好適である。高融点金属粉末６０
を塗布する方法は、粒径が１μｍ程度のモリブデン粉末
やタングステン粉末などを有機溶媒、例えば酢酸ブチル
と混合し、筆やスパチュラなどでその溶液をすくって電
極芯棒４０の表面に付着させ、室温で乾燥させる。粉末
の膜厚は５０μｍ程度で良い。It is necessary that the high melting point metal powder 60 does not melt at the main sintering temperature of the functionally graded material. Molybdenum powder, tungsten powder, tungsten powder, tantalum powder, vanadium powder, zirconium powder, niobium powder, or one or more mixed metal powder,
Since it has a high melting point and does not cause changes such as melting, scattering, and alloying during the main sintering, it is preferable. High melting point metal powder 60
Is applied by mixing a molybdenum powder or a tungsten powder having a particle size of about 1 μm with an organic solvent, for example, butyl acetate, scooping the solution with a brush or a spatula and attaching the solution to the surface of the electrode core 40, and And dry. The thickness of the powder may be about 50 μm.
【００２２】かかる電極芯棒４０を仮焼結体の中心孔５
３に挿入し、非酸化性雰囲気ないし１０-2Ｐａ程度の減
圧下にて、１７００℃程度の温度で１０分間程度本焼結
し、電極芯棒４０を焼き締める。つまり、電極芯棒４０
を閉塞部構造体５０の中心孔５３内に隙間なく焼き締め
る。そして、電極芯棒４０を焼き締めた閉塞部構造体５
０を閉塞管１２に挿入し、閉塞部構造体５０と閉塞管１
２を溶着することによって閉塞管１２を閉塞する。この
ように、電極芯棒４０が閉塞部構造体５０の中心孔５３
内に隙間なく焼き締められているので、点灯時の最冷点
がここにできることがなく、封入物の凝縮を防ぐことが
できる。The electrode core 40 is inserted into the center hole 5 of the temporarily sintered body.
3 and main-sintered at a temperature of about 1700 ° C. for about 10 minutes under a non-oxidizing atmosphere or a reduced pressure of about 10 −2 Pa, and the electrode core bar 40 is baked. That is, the electrode core rod 40
In the central hole 53 of the closing part structure 50 without gaps. Then, the closed part structure 5 in which the electrode core bar 40 is shrunk
0 is inserted into the occlusion tube 12, and the occlusion part structure 50 and the occlusion tube 1 are inserted.
2 is welded to close the closing tube 12. As described above, the electrode core rod 40 is connected to the center hole 53 of the closed portion structure 50.
Since the inside is tightly sealed without any gap, the coldest point at the time of lighting cannot be formed here, and the condensation of the enclosure can be prevented.
【００２３】この傾斜機能材料の本焼結時において、傾
斜機能材料のモリブデンを含有しない領域と電極芯棒４
０の間には、高融点金属の薄膜７０が介在するので、高
融点金属の薄膜７０とシリカのみからなる傾斜機能材料
は馴染まない。従って、電極芯棒４０を強く焼き締めて
も、この領域においてクラックが入ることがない。During the main sintering of the functionally graded material, the molybdenum-free region of the functionally graded material and the electrode core 4
Since the high-melting-point metal thin film 70 is interposed between zero, the functionally-graded material consisting of only the high-melting-point metal thin film 70 and silica is not compatible. Therefore, even if the electrode core bar 40 is strongly tightened, no crack is formed in this region.
【００２４】もし、傾斜機能材料のモリブデンを含有す
る領域と電極芯棒４０の間にも高融点金属の薄膜７０の
みが介在するのであれば、傾斜機能材料のモリブデンを
含有する領域は高融点金属の薄膜７０と馴染じみ、電極
芯棒４０を強く焼き締めるとクラックが発生する。しか
し、本発明においては、傾斜機能材料のモリブデンを含
有する領域と電極芯棒４０の間に高融点金属の粉末６０
が介在するので、傾斜機能材料を本焼結するときに、高
融点金属の粉末６０は焼結されずに脆弱な層になり、傾
斜機能材料が本焼結により収縮するとこの脆弱な層が崩
壊する。すなわち、高融点金属の粉末６０は本焼結時に
クッションの役目を果たすので、電極芯棒４０を強く焼
き締めてもモリブデンを含有する領域においてクラック
が発生しない。このように、傾斜機能材料と電極芯棒４
０の間に介在する高融点金属薄膜７０と高融点金属粉末
６０の両方の作用により、傾斜機能材料の導電性無機物
質成分を含有する領域においても導電性無機物質成分を
含有しない領域においてもクラックが発生しない。If only the high-melting-point metal thin film 70 is interposed between the region containing molybdenum of the functionally graded material and the electrode core 40, the region containing molybdenum of the functionally graded material is Cracks when the electrode core bar 40 is strongly squeezed. However, in the present invention, the high melting point metal powder 60 is placed between the region containing molybdenum of the functionally gradient material and the electrode core 40.
When the functionally graded material is fully sintered, the high melting point metal powder 60 becomes a fragile layer without being sintered, and when the functionally graded material contracts due to the main sintering, the fragile layer collapses. I do. That is, since the high melting point metal powder 60 serves as a cushion during the main sintering, cracks do not occur in the molybdenum-containing region even when the electrode core bar 40 is strongly baked. Thus, the functionally graded material and the electrode rod 4
By the action of both the high-melting-point metal thin film 70 and the high-melting-point metal powder 60 interposed between zero and zero, cracks occur both in the region containing the conductive inorganic material component of the functionally gradient material and in the region not containing the conductive inorganic material component. Does not occur.
【００２５】次に、上記の本発明の閉塞部構造体５０で
閉塞した１５０Ｗの超高圧水銀ランプと、傾斜機能材料
と電極芯棒４０の間になにも介在しない従来の閉塞部構
造体で閉塞した高圧放電ランプの点灯試験を行った。供
試本数は共に５本であり、空気中で４５分点灯、１５分
消灯の繰返しサイクルにて水平点灯とした。その結果、
従来のランプでは、点灯４５分後にすべてのランプで閉
塞部構造体においてリークが生じ、不点灯となったが、
本発明の閉塞部構造体５０で閉塞したランプは点灯後１
５００時間経過しても不具合は生じなかった。Next, a 150 W ultrahigh-pressure mercury lamp closed by the above-described closing portion structure 50 of the present invention and a conventional closing portion structure in which nothing is interposed between the functionally graded material and the electrode core 40. A lighting test of the closed high-pressure discharge lamp was performed. The number of test specimens was 5 in each case, and horizontal lighting was performed in a repeated cycle of lighting for 45 minutes and turning off lights for 15 minutes in the air. as a result,
In the conventional lamp, after 45 minutes of lighting, all the lamps leaked in the closed part structure and became unlit.
The lamp closed by the closing portion structure 50 of the present invention is
No trouble occurred even after 500 hours.
【００２６】なお、ここでは、超高圧水銀ランプで説明
したが、メタルハライドランプ、キセノンランプ、ハロ
ゲンランプやハロゲンヒータ等の閉塞管を有するランプ
にも使用できる。また、閉塞部構造体５０の中心孔５３
は貫通しない例で説明したが、電極芯棒４０を閉塞部構
造体５０に貫通して固定する場合もあり、本発明は、中
心孔５３が貫通孔の場合にも適用できることは云うまで
もない。Although the description has been made of the ultra-high pressure mercury lamp here, the present invention can be used for a lamp having a closed tube such as a metal halide lamp, a xenon lamp, a halogen lamp, and a halogen heater. In addition, the center hole 53 of the closing portion structure 50
Although the description has been given of an example in which the electrode core rod is not penetrated, the electrode core rod 40 may be penetrated and fixed to the closing portion structure 50, and it is needless to say that the present invention can be applied even when the center hole 53 is a through hole. .
【００２７】[0027]
【発明の効果】以上説明したように、本発明は、傾斜機
能材料で成形された閉塞部構造体において、少なくとも
閉塞部構造体の導電性無機物質非含有領域の中心孔に位
置する電極芯棒の表面に高融点金属薄膜を被覆し、少な
くとも閉塞部構造体の導電性無機物質含有領域の中心孔
に位置する電極芯棒の表面には高融点金属粉末を塗布し
たので、電極芯棒を閉塞部構造体の中心孔内に隙間なく
焼き締めて、電極芯棒と閉塞部構造体の間に最冷点であ
る隙間が形成されないようにしても、焼結時にクラック
が入ることがない。As described above, according to the present invention, in a closed structure formed of a functionally graded material, an electrode core rod located at least in a center hole of a conductive inorganic material-free region of the closed structure. The high melting point metal thin film was coated on the surface of the electrode core rod, and the high melting point metal powder was applied to at least the surface of the electrode core rod located in the center hole of the conductive inorganic material-containing region of the closed part structure. Even if the gap is formed between the electrode core bar and the closed part structure so that no gap is formed between the electrode core bar and the closed part structure, no crack is formed during sintering, even if the center hole of the part structure is sintered without gaps.
【図１】発光管の閉塞管が傾斜機能材料で形成された閉
塞部構造体で閉塞された高圧放電ランプの説明図であ
る。FIG. 1 is an explanatory view of a high-pressure discharge lamp in which a closed tube of an arc tube is closed by a closed structure formed of a functionally gradient material.
【図２】本発明実施例の断面図である。FIG. 2 is a sectional view of an embodiment of the present invention.
１１ 発光管 １２ 閉塞管 ２０ 陽極 ３０ 陰極 ４０ 電極芯棒 ５０ 閉塞部構造体 ５３ 中心孔 ６０ 高融点金属粉末 ７０ 高融点金属薄膜 DESCRIPTION OF SYMBOLS 11 Arc tube 12 Closure tube 20 Anode 30 Cathode 40 Electrode core bar 50 Closure part structure 53 Center hole 60 Refractory metal powder 70 Refractory metal thin film
Claims (2)
成分とが長手方向に連続的または段階的な濃度勾配を持
ち、一方側が非導電性領域であって他方側が導電性領域
である略円柱状の傾斜機能材料で構成され、その中心孔
に電極芯棒を焼き締めて保持した状態で、発光管に連設
された閉塞管を閉塞する管球の閉塞部構造体において、 前記電極芯棒は、該閉塞部構造体の中心孔内に隙間なく
焼き締められ、少なくとも該閉塞部構造体の導電性無機
物質成分非含有領域の中心孔に位置する該電極芯棒の表
面には高融点金属薄膜が被覆され、少なくとも該閉塞部
構造体の導電性無機物質成分含有領域の中心孔に位置す
る該電極芯棒の表面には高融点金属粉末が塗布されてい
ることを特徴とする管球の閉塞部構造体。A conductive inorganic material component and a non-conductive inorganic material component have a continuous or stepwise concentration gradient in the longitudinal direction, and one side is a non-conductive region and the other side is a conductive region. In a closed structure of a bulb, which is made of a columnar functionally graded material, and in which a center hole of the electrode core bar is shrunk and held, a closed tube structure for closing a closed tube connected to the arc tube is provided. The rod is tightly tightened in the center hole of the closed part structure without a gap, and at least the surface of the electrode core bar located at the center hole of the conductive inorganic material component-free region of the closed part structure has a high melting point. A tube coated with a metal thin film and coated with a high melting point metal powder on at least the surface of the electrode core bar located at the center hole of the conductive inorganic material component-containing region of the closed part structure; Closure structure.
ウムもしくはロジウムのめっき被膜であり、前記高融点
金属粉末がモリブデン粉末、タングステン粉末、タンタ
ル粉末、バナジウム粉末、ジルコニウム粉末、ニオブ粉
末のいずれか一種あるいは二種以上の混合金属粉末であ
ることを特徴とする請求項１記載の管球の閉塞部構造
体。2. The refractory metal thin film is a plated coating of platinum, rhenium or rhodium, and the refractory metal powder is any one of molybdenum powder, tungsten powder, tantalum powder, vanadium powder, zirconium powder, niobium powder or 2. The closed structure of a bulb according to claim 1, wherein the mixed metal powder is a mixture of two or more kinds of metal powders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06928498A JP3806794B2 (en) | 1998-03-05 | 1998-03-05 | Tube occlusion structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06928498A JP3806794B2 (en) | 1998-03-05 | 1998-03-05 | Tube occlusion structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11260315A true JPH11260315A (en) | 1999-09-24 |
| JP3806794B2 JP3806794B2 (en) | 2006-08-09 |
Family
ID=13398175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06928498A Expired - Lifetime JP3806794B2 (en) | 1998-03-05 | 1998-03-05 | Tube occlusion structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3806794B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6867544B2 (en) | 2001-09-04 | 2005-03-15 | Matsushita Electric Industrial Co., Ltd. | High pressure discharge lamp and method for producing the same |
| US6890236B2 (en) | 2001-12-05 | 2005-05-10 | Matsushita Electric Industrial Co., Ltd. | Producing high pressure discharge lamp of plural glass members having different softening points producing high pressure |
-
1998
- 1998-03-05 JP JP06928498A patent/JP3806794B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6867544B2 (en) | 2001-09-04 | 2005-03-15 | Matsushita Electric Industrial Co., Ltd. | High pressure discharge lamp and method for producing the same |
| US6890236B2 (en) | 2001-12-05 | 2005-05-10 | Matsushita Electric Industrial Co., Ltd. | Producing high pressure discharge lamp of plural glass members having different softening points producing high pressure |
| US6965202B2 (en) | 2001-12-05 | 2005-11-15 | Matsushita Electric Industrial Co., Ltd. | High pressure discharge lamp and lamp unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3806794B2 (en) | 2006-08-09 |
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