JPS628424A - Manufacture of flash light discharge lamp - Google Patents
Manufacture of flash light discharge lampInfo
- Publication number
- JPS628424A JPS628424A JP14562785A JP14562785A JPS628424A JP S628424 A JPS628424 A JP S628424A JP 14562785 A JP14562785 A JP 14562785A JP 14562785 A JP14562785 A JP 14562785A JP S628424 A JPS628424 A JP S628424A
- Authority
- JP
- Japan
- Prior art keywords
- heating
- starting voltage
- discharge starting
- vacuum
- sintered
- 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
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は閃光放電ランプの製造方法に関するものである
。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing flash discharge lamps.
従来の技術
従来、閃光放電ランプ例えばキセノン放電ランプの陰極
は、電子放射性物質を塗布または内蔵した焼結体とこれ
を支持する導電体からなる棒体または板体とから構成さ
れている。多くの場合、焼結体は、タングステン、モリ
ブデン、タンタル等の高融点金属を主体とするものから
なシ、また電子放射性物質は、アルカリ金属、アルカリ
土類金属、アルカリ土類元素等からなる。2. Description of the Related Art Conventionally, the cathode of a flash discharge lamp, such as a xenon discharge lamp, is composed of a sintered body coated with or containing an electron radioactive substance and a rod or plate made of a conductor supporting the sintered body. In many cases, the sintered body is mainly composed of a high melting point metal such as tungsten, molybdenum, tantalum, etc., and the electron radioactive substance is composed of an alkali metal, an alkaline earth metal, an alkaline earth element, etc.
ストロボ用のキセノン放電ランプの場合は、電子放射性
物質としてセシウムが多用されている。In the case of xenon discharge lamps for strobes, cesium is often used as an electron radioactive substance.
従来、このセシウム含有の焼結体、すなわち焼結型陰極
を得る方法として、焼結体にセシウムの化合物水溶液を
含浸させた後、この焼結体を空気中や不活性ガス中で乾
燥させることが知られている。Conventionally, the method for obtaining this cesium-containing sintered body, that is, a sintered cathode, is to impregnate the sintered body with an aqueous solution of a cesium compound, and then dry the sintered body in air or in an inert gas. It has been known.
発明が解決しようとする問題点
しかしながら、このような乾燥方法では焼結体に含浸さ
れた水分を十分に除去することが困難であり、このため
焼結型陰極を陽極とともに管内に組み込んだ際に焼結型
陰極内の残留水分が管内に放出されて残る場合があり、
その結果放電開始電圧が大きくばらつき、また放電開始
電圧が高くなるという問題を生じていた。Problems to be Solved by the Invention However, with such a drying method, it is difficult to sufficiently remove moisture impregnated into the sintered body. Residual moisture inside the sintered cathode may be released and remain inside the tube.
As a result, there has been a problem in that the discharge starting voltage varies widely and the discharge starting voltage becomes high.
本発明は放電開始電圧のばらつきが小さく、また放電開
始電圧が低い閃光放電ランプの製造方法を提供するもの
である。The present invention provides a method for manufacturing a flash discharge lamp with small variations in discharge starting voltage and a low discharge starting voltage.
問題点を解決するだめの手段
本発明の閃光放電ランプの人造方法は、焼結体に電子放
射性物質水溶液を含浸させた後、前記焼結体を真空中で
加熱することによシ水分を除去し乾燥する工程を含むこ
とを特徴とするものである。Means for Solving the Problems The artificial flash discharge lamp manufacturing method of the present invention involves impregnating a sintered body with an aqueous solution of an electron radioactive substance and then heating the sintered body in a vacuum to remove moisture. The method is characterized in that it includes a step of drying.
作 用
この構成により、乾燥時焼結体の水分が蒸発しやすくな
り、焼結体中の水分が十分に除去されることとなる。Function: With this configuration, the moisture in the sintered body evaporates easily during drying, and the moisture in the sintered body is sufficiently removed.
実施例
以下、本発明の一実施例についてキセノン放電ランプの
製造方法を例にとって説明する。EXAMPLE Hereinafter, an example of the present invention will be described using a method for manufacturing a xenon discharge lamp as an example.
まず、外径１．６１１Ｑｌ１１長さ３．２ｍｍのタング
ステン−ニッケル焼結体に１０チの炭酸セシウムヲ含む
水溶液を含浸させる。次に、この焼結体を真空チャンバ
ー内に入れ、真空排気を行い、真空度が１０−５’ Ｔ
ｏｒｒ台に到達した後、加熱を開始する。First, a tungsten-nickel sintered body having an outer diameter of 1.611 mm and a length of 3.2 mm is impregnated with an aqueous solution containing 10 mm of cesium carbonate. Next, this sintered body is placed in a vacuum chamber and evacuated to a vacuum degree of 10-5'T.
After reaching the orr stage, heating is started.
加熱を開始すると、水分が焼結体内部から離脱するため
、真空度が低下するので、圧力が１Ｏ−３Ｔｏｒｒ以下
になるように加熱を制御する。最高加熱温度を１６０′
Ｃとし、この温度で真空度が加熱前の状態、すなわち１
０ Ｔｏｒｒ台に復帰するまで加熱を続行すると、焼
結型陰極が得られる。When heating is started, the degree of vacuum decreases because moisture leaves the inside of the sintered body, so heating is controlled so that the pressure is 10-3 Torr or less. Maximum heating temperature 160'
C, and at this temperature the degree of vacuum is the state before heating, that is, 1
If heating is continued until the temperature returns to the 0 Torr level, a sintered cathode is obtained.
このようにして得られた焼結型陰極をピン状の陽極とと
もにガラス管内に組み込んでキセノン放電ランプ（本発
明品）を２４本製作してエージング（強制点灯）試験を
した。これらのキセノン放電ランプのエージング前後の
放電開始電圧を測定したところ、第１表に示すとおりの
結果となった。The sintered cathode thus obtained was incorporated into a glass tube together with a pin-shaped anode to produce 24 xenon discharge lamps (products of the present invention), and an aging (forced lighting) test was conducted. When the discharge starting voltages of these xenon discharge lamps were measured before and after aging, the results were as shown in Table 1.
一方、比較のため、従来の方法により得られた焼結型陰
極を用い、上記と同様の構成を有するキセノン放電ラン
プ（従来品）を２４本製作してエージング試験をした。On the other hand, for comparison, 24 xenon discharge lamps (conventional products) having the same configuration as above were manufactured using sintered cathodes obtained by a conventional method and subjected to an aging test.
これらのキセノン放電ランプのエージング前後の放電開
始電圧を測定したところ、第１表に示すとおりの結果と
なった。When the discharge starting voltages of these xenon discharge lamps were measured before and after aging, the results were as shown in Table 1.
（以下余ｂ） 第 １ 表 なお、第１表中、枠内の余白個所は０本を意味する。(Hereafter, remainder b) Chapter 1 Table In Table 1, blank space within the frame means 0 lines.
そして、それらの放電開始電圧（平均値）を計算により
求めると、第２表に示すとおりとなった。The discharge starting voltages (average values) were determined by calculation and were as shown in Table 2.
第 ２ 表
第１表および第２表から明らかなように、本発明品は従
来品に比べてエージング前後を通じて放電開始電圧のば
らつきが小さく、また放電開始電圧も低く、安定した特
性が得られていることがわかる。これは、従来方法の場
合には乾燥時に残留水分にばらつきを生じ、このため放
電開始電圧のばらつきが大きくなり、また残留水分の多
い焼結型陰極においてこの残留水分が有害な働きをし、
このため放電開始電圧の上昇を招くのに対し、本発明方
法の場合にはいずれの焼結型陰極でも乾燥時に水分が十
分に除去される結果、前記のような問題を解決すること
ができたものと考えられる。Table 2 As is clear from Tables 1 and 2, the product of the present invention has smaller variations in discharge starting voltage before and after aging than the conventional product, and has a lower discharge starting voltage, resulting in stable characteristics. I know that there is. This is because in the case of the conventional method, the residual moisture varies during drying, which increases the dispersion of the discharge starting voltage, and this residual moisture has a harmful effect on the sintered cathode, which has a large amount of residual moisture.
This leads to an increase in the discharge starting voltage, whereas in the case of the method of the present invention, moisture is sufficiently removed during drying of any sintered cathode, and as a result, the above-mentioned problem can be solved. considered to be a thing.
発明の詳細
な説明したように、本発明によれば、従来の製造方法に
比べて、放電開始電圧のばらつきが小さく、また放電開
始電圧も低い等すぐれた効果を有する閃光放電ランプの
製造方法を提供することができるものである。DETAILED DESCRIPTION OF THE INVENTION As described in detail, the present invention provides a method for manufacturing a flash discharge lamp which has superior effects such as smaller variations in discharge starting voltage and lower discharge starting voltage compared to conventional manufacturing methods. It is something that can be provided.
Claims (1)
体を真空中で加熱することにより水分を除去し乾燥する
工程を含むことを特徴とする閃光放電ランプの製造方法
。1. A method for manufacturing a flash discharge lamp, comprising the steps of impregnating a sintered body with an aqueous solution of an electron radioactive substance, and then heating the sintered body in a vacuum to remove moisture and drying the sintered body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14562785A JPS628424A (en) | 1985-07-02 | 1985-07-02 | Manufacture of flash light discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14562785A JPS628424A (en) | 1985-07-02 | 1985-07-02 | Manufacture of flash light discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS628424A true JPS628424A (en) | 1987-01-16 |
Family
ID=15389381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14562785A Pending JPS628424A (en) | 1985-07-02 | 1985-07-02 | Manufacture of flash light discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS628424A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4840149A (en) * | 1987-07-07 | 1989-06-20 | Toyota Jidosha Kabushiki Kaisha | Camshaft apparatus for an internal combustion engine |
| CN103165361A (en) * | 2013-03-13 | 2013-06-19 | 清华大学深圳研究生院 | Preparation method of cathode containing cesium chemical compounds and cathode containing cesium chemical compounds |
-
1985
- 1985-07-02 JP JP14562785A patent/JPS628424A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4840149A (en) * | 1987-07-07 | 1989-06-20 | Toyota Jidosha Kabushiki Kaisha | Camshaft apparatus for an internal combustion engine |
| CN103165361A (en) * | 2013-03-13 | 2013-06-19 | 清华大学深圳研究生院 | Preparation method of cathode containing cesium chemical compounds and cathode containing cesium chemical compounds |
| CN103165361B (en) * | 2013-03-13 | 2015-11-25 | 清华大学深圳研究生院 | A kind of preparation method containing cesium compound negative electrode and this negative electrode |
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