JPS6334834A - Cathode structure for magnetron - Google Patents
Cathode structure for magnetronInfo
- Publication number
- JPS6334834A JPS6334834A JP17695986A JP17695986A JPS6334834A JP S6334834 A JPS6334834 A JP S6334834A JP 17695986 A JP17695986 A JP 17695986A JP 17695986 A JP17695986 A JP 17695986A JP S6334834 A JPS6334834 A JP S6334834A
- Authority
- JP
- Japan
- Prior art keywords
- lead wire
- molybdenum
- filament
- end cap
- nickel
- 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
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 11
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011733 molybdenum Substances 0.000 claims abstract description 10
- 229910001182 Mo alloy Inorganic materials 0.000 claims abstract description 9
- 229910000990 Ni alloy Inorganic materials 0.000 claims abstract 2
- 238000005219 brazing Methods 0.000 claims description 22
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 17
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 9
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 229910000679 solder Inorganic materials 0.000 abstract 1
- 238000002844 melting Methods 0.000 description 11
- 230000008018 melting Effects 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- OUFGXIPMNQFUES-UHFFFAOYSA-N molybdenum ruthenium Chemical compound [Mo].[Ru] OUFGXIPMNQFUES-UHFFFAOYSA-N 0.000 description 8
- 239000000945 filler Substances 0.000 description 7
- 150000002739 metals Chemical class 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000006023 eutectic alloy Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052707 ruthenium Inorganic materials 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- DDTIGTPWGISMKL-UHFFFAOYSA-N molybdenum nickel Chemical compound [Ni].[Mo] DDTIGTPWGISMKL-UHFFFAOYSA-N 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Microwave Tubes (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明はマグネトロン用陰極構体に関するものである。[Detailed description of the invention] Industrial applications The present invention relates to a cathode assembly for a magnetron.
従来の技術
マグネトロンの陰極構体は、コイル状のフィラメントと
、一対のリード線と、これらリード線の一端にそれぞれ
取り付けられているエンドキャップとからなり、前記フ
ィラメントの両端がそれぞれろう材で前記エンドキャッ
プに取り付けられている。The cathode structure of a conventional magnetron consists of a coiled filament, a pair of lead wires, and an end cap attached to one end of each of these lead wires. is attached to.
このような陰極構体において、マグネロンの発振時、フ
ィラメントは通電によって中央部分が約１７００℃以上
の非常に高い温度に達する。そのため、ろう材には、こ
れまで高融点材料であるルテニウム−モリブデン合金が
広（使用されて来ている。In such a cathode structure, when the magnetron oscillates, the filament reaches a very high temperature of approximately 1700° C. or higher in the central portion due to energization. Therefore, ruthenium-molybdenum alloys, which are high melting point materials, have been widely used as brazing filler metals.
発明が解決しようとする問題点
ところが、ルテニウム−モリブデン合金は融点が非常に
高い（共晶温度１９０００Ｃ）ことから、フィラメント
とエンドキャップとのろう付けがむずかしく、そのため
、陰極構体の製造価格が高くなって、マグネトロンの価
格低減の障害となっている。Problems to be Solved by the Invention However, since the ruthenium-molybdenum alloy has a very high melting point (eutectic temperature of 19000C), it is difficult to braze the filament and the end cap, which increases the manufacturing cost of the cathode structure. This is an obstacle to reducing the price of magnetrons.
低い温度でろう付けできるようにするために、ろう材に
ついて検討されており、これまでにもルテニウム−モリ
ブデン共晶合金にニッケルを含有させることが提案され
ている（特開昭５８−２０４４３６号公報、同６０−１
７２０号公報）。In order to enable brazing at low temperatures, brazing filler metals have been studied, and it has been proposed to incorporate nickel into a ruthenium-molybdenum eutectic alloy (Japanese Patent Laid-Open No. 58-204436). , 60-1
Publication No. 720).
この合金は、ルテニウム−モリブデン合金そのものより
も融点が低く、ろう付けが容易になるという利点をもっ
ている。This alloy has the advantage that it has a lower melting point than the ruthenium-molybdenum alloy itself, making it easier to braze.
ところが、このろう材は高価なルテニウムを主成分の一
つとしており、陰極構体のコストダウンには必ずしも十
分なものとは言えなかった。However, this brazing filler metal contains expensive ruthenium as one of its main components, and was not necessarily sufficient to reduce the cost of the cathode structure.
ところで、前述したように、通電時、フィラメントの中
央部分は非常に高い温度となるが、両端部分の温度は、
エンドキャップおよびリード線を通しての放熱があるた
めに、中央部分に比べてかなり低い。発明者の調らべた
ところによれば、ろう付は部分での温度は約１０００℃
であり、これから、フィラメントの両端を接続保持する
ためには、従来のような高融点のろう材でなくてもよい
ことが明らかとなった。By the way, as mentioned above, when electricity is applied, the temperature at the center of the filament is extremely high, but the temperature at both ends is
It is considerably lower than the central part due to heat dissipation through the end cap and lead wires. According to the inventor's research, the temperature at each part of brazing is approximately 1000℃.
From this, it has become clear that in order to connect and hold both ends of the filament, it is not necessary to use a conventional high-melting-point brazing filler metal.
本発明は、このような知見にもとづくもので、安価な陰
極構体を提供することを目的とする。The present invention is based on such knowledge and aims to provide an inexpensive cathode structure.
問題点を解決するための手段
本発明のマグネトロンは、フィラメントとエンドキャッ
プとを、ニッケルとモリブデンとからなるろう材で接続
しているものである。Means for Solving the Problems The magnetron of the present invention connects a filament and an end cap with a brazing filler metal made of nickel and molybdenum.
作 用
ニッケルとモリブデンとからなる合金は、一般に、ルテ
ニウム−モリブデン系合金に比べて融点が低く、またタ
ングステンやモリブデン、タンタルといった高融点金属
からなるエンドキャップやフィラメントなどとの濡れ性
もよいため、陰極構体の組立が容易となる
実施例
以下、本発明の一実施例について、図面を用いて説明す
る。Function Alloys made of nickel and molybdenum generally have a lower melting point than ruthenium-molybdenum alloys, and also have good wettability with end caps and filaments made of high-melting point metals such as tungsten, molybdenum, and tantalum. Embodiment that facilitates assembly of cathode assembly An embodiment of the present invention will be described below with reference to the drawings.
第１図は、この実施例の断面図である。FIG. 1 is a sectional view of this embodiment.
図において、ｌは中央に位置するリード線、２はそれと
平行に配置されているリード線であり、その寸法はリー
ド線１に比べて短く形成されている。３は円柱状部分の
一端に鍔状部分が形成されているエンドキャップで、そ
の中心軸に沿って貫通孔が設けられており、この孔にリ
ード線１の端部が挿入されてろう付けされ、リード線１
に固定されている。４はエンドキャップ３とほぼ同じ形
状のエンドキャップで、その鍔状部分にて他方のリード
線２の先端部にろう付けもしくは溶接などの方法で取り
付けられている。そして、このエンドキャップ４には、
その中心軸に沿ってリード線１の太さよりも径の大きな
貫通孔が形成されており、リード線１がこの貫通孔と同
軸になるよう挿通配置されている。前記貫通孔の内壁面
とリード線１との間隙は、通電時、その間で放電が生じ
ない程度の寸法とされている。In the figure, 1 is a lead wire located at the center, 2 is a lead wire arranged parallel to the lead wire 1, and the lead wire 2 is shorter than the lead wire 1. 3 is an end cap in which a flange-like part is formed at one end of a cylindrical part, and a through hole is provided along the central axis of the end cap, and the end of the lead wire 1 is inserted into this hole and brazed. , lead wire 1
Fixed. Reference numeral 4 designates an end cap having approximately the same shape as the end cap 3, and its brim-shaped portion is attached to the tip of the other lead wire 2 by a method such as brazing or welding. And in this end cap 4,
A through hole having a diameter larger than the thickness of the lead wire 1 is formed along the central axis, and the lead wire 1 is inserted through the hole so as to be coaxial with the through hole. The gap between the inner wall surface of the through hole and the lead wire 1 is dimensioned to such an extent that no discharge occurs therebetween when electricity is applied.
５はコイル状のフィラメントで、その端部にそれぞれエ
ンドキャップ３．４の円柱状の部分が挿入されて保持さ
れている。６，７はろう材で、フィラメント５の端部と
エンドキャップ３，４とを接続している。Reference numeral 5 denotes a coiled filament, and the cylindrical portions of end caps 3.4 are inserted into and held at the ends of each filament. 6 and 7 are brazing materials that connect the ends of the filament 5 and the end caps 3 and 4.
前記ろう材６，７はニッケルとモリブデンとからなり、
その組成比率はニッケルが１０〜３０重量％て、残部が
モリブデンである。The brazing filler metals 6 and 7 are made of nickel and molybdenum,
Its composition ratio is 10 to 30% by weight of nickel, and the remainder is molybdenum.
−ツケルとモリブデンとからなるろう材６，７は、第２
図に示すよ・うに、その融点がニッケルの含有比率が大
きくなるに従って単調に低くなる。- The brazing filler metals 6 and 7 made of copper and molybdenum are
As shown in the figure, the melting point decreases monotonically as the nickel content increases.
その含有比率が１０重量％以上になると、融点が１６６
０℃以下となり、ルテニウム−モリブデン共晶合金の融
点に比べて非常に低（なる。ところが、ニッケル含有比
率が３０重量％を超えると、ニッケルの蒸気圧が高く、
また管内の真空度が高いことから、それが蒸発して、マ
グネトロンの管内の壁面に付着するという不都合が生じ
る。このため、ニッケルの含有量は１０〜３０重量％で
あることが望ましい。When the content ratio is 10% by weight or more, the melting point is 166%.
0℃ or less, which is very low compared to the melting point of the ruthenium-molybdenum eutectic alloy.However, if the nickel content exceeds 30% by weight, the vapor pressure of nickel is high;
Furthermore, since the degree of vacuum inside the tube is high, there is the problem that it evaporates and adheres to the wall surface inside the magnetron tube. For this reason, it is desirable that the nickel content is 10 to 30% by weight.
このように、ニッケルとモリブデンとからなるろう材は
、その融点が低いため、ろう付けのための段面がルテニ
ウム−モリブデン合金を用いる場合に比べて安価なもの
でよい。その上、これは高価なルテニウムを含まないた
め、価格がルテニウム−モリブデン系合金に比べて約１
０分の１から２分の１と安価であり、さらにタングステ
ンなどに対する濡れ性もよい。このため、エンドキャッ
プと７トラメントとのろう付（Ｊが非常に容易となり、
陰極構体の価格をより一層低減できる。それにより、マ
グネトロンを容易にコストダウンすることができる。As described above, since the brazing material made of nickel and molybdenum has a low melting point, the stepped surface for brazing may be less expensive than when a ruthenium-molybdenum alloy is used. Moreover, it does not contain expensive ruthenium, so the price is about 10% lower than that of ruthenium-molybdenum alloys.
It is 1/0 to 1/2 cheaper, and has good wettability to tungsten and the like. For this reason, brazing (J) between the end cap and the 7-trament becomes very easy.
The price of the cathode structure can be further reduced. Thereby, the cost of the magnetron can be easily reduced.
上記実施例では、エンドキャップとフィラメントとのろ
う付けについてのみ説明をしたが、リード線とエンドキ
ャップとをろう材６．７と同じ組成のろう材で接合して
一体化してもよいことはいうまでもないことである。In the above embodiment, only the brazing between the end cap and the filament was explained, but it is also possible to integrate the lead wire and the end cap by joining them with a brazing material having the same composition as the brazing material 6.7. Of course.
発明の効果
本発明の陰極構体は、リード線とエンドキャップとをニ
ッケルとモリブデンとからなる合金でろう付けしたもの
であるため、その融点が低くてろう付けが非常に容易で
あり、また材料費が安価であることから、マグネトロン
の価格を低減することができる。Effects of the Invention Since the cathode structure of the present invention is made by brazing the lead wire and the end cap with an alloy consisting of nickel and molybdenum, its melting point is low and brazing is very easy, and the material cost is also low. Since the magnetron is inexpensive, the price of the magnetron can be reduced.
第１図は本発明を実施した陰極構体の断面図、第２図は
ニッケルーモリブデン合金の成分比率と融点との関係を
示す図である。
１．２・・・・・・リード線、３，４・・・・・・エン
ドキャップ、５・・・・・・フィラメント、６，７・・
・・・・ろう材。
代理人の氏名 弁理士 中尾敏男 ほか１名Ｚｚ−ワー
ドｆ民
Ｑ４−エンど千７ツフ。
５−−スラメシト
６．７−−−５ Ｍ７
窮 １ 図FIG. 1 is a sectional view of a cathode structure embodying the present invention, and FIG. 2 is a diagram showing the relationship between the component ratio and melting point of a nickel-molybdenum alloy. 1.2...Lead wire, 3,4...End cap, 5...Filament, 6,7...
・・・Brazing material. Name of agent: Patent attorney Toshio Nakao and one other person ZZ-Ward Fmin Q4-Endosen7tsufu. 5--Surameshito 6.7--5 M7 Kaku 1 Figure
Claims (2)
リブデンとの合金からなるろう材で接続されていること
を特徴とするマグネトロン用陰極構体。(1) A cathode structure for a magnetron, characterized in that a filament and an end pad are connected with a brazing material made of an alloy of nickel and molybdenum.
あることを特徴とする特許請求の範囲第１項に記載のマ
グネトロン用陰極構体。(2) The cathode assembly for a magnetron according to claim 1, wherein the nickel content of the brazing material is 10 to 30% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17695986A JPS6334834A (en) | 1986-07-28 | 1986-07-28 | Cathode structure for magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17695986A JPS6334834A (en) | 1986-07-28 | 1986-07-28 | Cathode structure for magnetron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6334834A true JPS6334834A (en) | 1988-02-15 |
Family
ID=16022706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17695986A Pending JPS6334834A (en) | 1986-07-28 | 1986-07-28 | Cathode structure for magnetron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6334834A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100825832B1 (en) | 2007-02-27 | 2008-04-28 | 안의현 | Method for manufacturing magnetron cathode structure and fusion method for fusing filament and molybdenum head of structure and method for manufacturing same |
-
1986
- 1986-07-28 JP JP17695986A patent/JPS6334834A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100825832B1 (en) | 2007-02-27 | 2008-04-28 | 안의현 | Method for manufacturing magnetron cathode structure and fusion method for fusing filament and molybdenum head of structure and method for manufacturing same |
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