JPH02301933A - Impregnated type cathode - Google Patents
Impregnated type cathodeInfo
- Publication number
- JPH02301933A JPH02301933A JP1123730A JP12373089A JPH02301933A JP H02301933 A JPH02301933 A JP H02301933A JP 1123730 A JP1123730 A JP 1123730A JP 12373089 A JP12373089 A JP 12373089A JP H02301933 A JPH02301933 A JP H02301933A
- Authority
- JP
- Japan
- Prior art keywords
- heater
- cathode
- impregnated
- sintered
- foot section
- 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
- 239000000843 powder Substances 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 5
- 239000001257 hydrogen Substances 0.000 abstract description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000758 substrate Substances 0.000 abstract description 5
- 238000004070 electrodeposition Methods 0.000 abstract description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 abstract description 2
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 2
- 239000011733 molybdenum Substances 0.000 abstract description 2
- DECCZIUVGMLHKQ-UHFFFAOYSA-N rhenium tungsten Chemical compound [W].[Re] DECCZIUVGMLHKQ-UHFFFAOYSA-N 0.000 abstract description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000020 Nitrocellulose Substances 0.000 abstract 1
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229920001220 nitrocellulos Polymers 0.000 abstract 1
- 229910000679 solder Inorganic materials 0.000 abstract 1
- 238000005219 brazing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
Landscapes
- Solid Thermionic Cathode (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、含浸型陰極に関し、特にヒータを埋込み固定
した含浸型陰極に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an impregnated cathode, and particularly to an impregnated cathode in which a heater is embedded and fixed.
従来、この種の含浸型陰極は、第２図に示すような構造
よりなっていた。すなわち、電子放射物質が含浸された
陰極基体１はモリブデン等の高融点金属からなる陰極ス
リーブ２の一端開口部にろう材３にでろう接されている
。ヒータ２４は、この陰極スリーブ２内に配設され、埋
込剤８により固定されている。このヒータ２４の埋込む
前の形状としては、二重らせん状に成形された部分は予
め電着法により酸化アルミニウムが被覆形成されている
が、ヒータ２４の２本の足の部分はヒータ２４の原線の
ままで露出していた。Conventionally, this type of impregnated cathode has had a structure as shown in FIG. That is, a cathode base 1 impregnated with an electron emitting substance is soldered to an opening at one end of a cathode sleeve 2 made of a high melting point metal such as molybdenum using a brazing material 3. The heater 24 is disposed within the cathode sleeve 2 and fixed with an implant 8. As for the shape of the heater 24 before it is embedded, the double spiral shaped portion is coated with aluminum oxide by electrodeposition, but the two leg portions of the heater 24 are coated with aluminum oxide. It was exposed in its original form.
° 〔発明が解決しようとする課題〕−上述した従来の
含浸型陰極は、ヒータ２４の足の部分がヒータ２４原線
のままで露出しているので、ヒータ２４に電圧を印加し
た瞬間、ラッシュ電流が流れ、このヒータ２４足部の温
度が局部的に上昇するという欠点がある。° [Problems to be Solved by the Invention] - In the conventional impregnated cathode described above, the leg portions of the heater 24 are exposed as the heater 24 original wires, so the moment a voltage is applied to the heater 24, a rush occurs. There is a drawback that current flows and the temperature at the foot of the heater 24 locally increases.
この問題は、埋込剤８で固定するヒータ２４の線形が細
くなる程、ヒータ２４足の温度が上がりやすい傾向にあ
り、ヒータ２４電圧印加のＯＮ。The problem with this problem is that the narrower the linear shape of the heater 24 fixed with the embedding agent 8, the more likely the temperature of the heater 24 feet will rise, and the voltage application to the heater 24 may be turned on.
ＯＦＦを繰り返１−行った場合、ヒータ断線につながる
という問題があった。There was a problem in that if the heater was turned off repeatedly, the heater would break.
例えば、従来の結果ではヒータ２４の線径が５０μｍの
ヒータ２４を埋込みラッシュ電流か流れた時のヒータ足
部の温度が約１７００°Ｃの含浸型陰極で、ヒータ電圧
印加ＯＮ 、○ドＦを繰返しな場合、約１万回でヒータ
断線が発生していた。For example, in the conventional results, an impregnated cathode was used in which the heater 24 with a wire diameter of 50 μm was embedded and the temperature at the foot of the heater was approximately 1700°C when a rush current flowed. In the case of repeated use, heater breakage occurred after about 10,000 times.
本発明の目的は、ヒータ断線のない含浸型陰極を提供す
ることにある。An object of the present invention is to provide an impregnated cathode without heater disconnection.
本発明は、電子放射物質が含浸された陰極基体と、該陰
極基体が一端開口部に接合された陰極スリーブと、該陰
極スリーブ内に配設され埋込剤により固定されたヒータ
とを備えた含浸型陰極において、前記埋込剤から収り出
された前記ヒータの足部の芯線表面が粒径１ｔＬｍ以上
１０μｍ以下の金属粉末の焼結層で被覆されている。The present invention includes a cathode substrate impregnated with an electron-emitting substance, a cathode sleeve in which the cathode substrate is joined to an opening at one end, and a heater disposed within the cathode sleeve and fixed with an embedding agent. In the impregnated cathode, the surface of the core wire of the foot of the heater extracted from the embedding agent is coated with a sintered layer of metal powder having a particle size of 1 tLm or more and 10 μm or less.
次に、本発明の実施例について図面を参照して説明する
。Next, embodiments of the present invention will be described with reference to the drawings.
・第１図は本発明の一実施例の断面図である。- Fig. 1 is a sectional view of one embodiment of the present invention.
第１図に示すように、電子放射物質か含浸された陰極基
体１は、この陰極基体１を支持するモリブデン製の陰（
がスリーブ２の一端開口部に、ろう材３てろう接、支持
されている。この陰極基体１は、ヒータ４により加熱さ
れる。このヒータ１１は、まず、線径５０μｍの３％レ
ニウム−タングステン線を二重コイル状に成形した後、
ヒータ足部５の部分を、粒径的１μｍのタングステン線
末と酢酸メチルと蛸化綿からなる金属ペースト溶諭中に
浸漬し、次に、乾燥させる。この作業を被γグ径が８０
μｍになるまで繰返し、この後、１７５０℃の水素炉で
約１０分間焼結させ、ヒータ足部５に金属粉末の焼結層
６を形成する。As shown in FIG.
A brazing material 3 is soldered and supported at one end opening of the sleeve 2. This cathode substrate 1 is heated by a heater 4. This heater 11 is made by first forming a 3% rhenium-tungsten wire with a wire diameter of 50 μm into a double coil shape, and then
The portion of the heater leg 5 is immersed in a metal paste solution consisting of tungsten wire powder with a particle size of 1 μm, methyl acetate, and cotton wool, and then dried. This work is done when the gamma diameter is 80mm.
The process is repeated until the thickness reaches μm, and then sintering is performed in a hydrogen furnace at 1750° C. for about 10 minutes to form a sintered layer 6 of metal powder on the heater foot 5.
次に、このヒータ４の二重コイル状に成形した部分に、
酸化アルミニウムを電着法により披ン岑させ、１６５０
°（′、の水素炉中で焼結させることにより、絶縁層７
を形成さぜヒータ４が完成する。Next, in the part formed into a double coil shape of this heater 4,
Aluminum oxide was deposited by electrodeposition, 1650
By sintering in a hydrogen furnace at °(', the insulating layer 7
The heater 4 is completed.
このヒータ４は、さらに、先の陰極スリーブ２の内に配
設され、酸化アルミニウムの粉末である埋込剤８で埋込
まれた後、＋７５（’１℃の水素炉中て′焼結固定され
る事により、含浸型陰極か完成する。This heater 4 is further disposed inside the cathode sleeve 2, embedded with a embedding agent 8 made of aluminum oxide powder, and then sintered and fixed in a hydrogen furnace at +75°C (1°C). By doing so, an impregnated cathode is completed.
本実施例の含浸型陰極を用いて、従来の含浸型陰極との
ヒータ電圧印加時のヒータ足の温度を比較すると、従来
タイプに比べ、約４００℃低下するという結果を得た。When the impregnated cathode of this example was compared with a conventional impregnated cathode in terms of the temperature of the heater leg when a heater voltage was applied, it was found that the temperature of the heater leg was about 400° C. lower than that of the conventional type.
さらに、ヒータ電圧印加ＯＮ、ＯＦＦの繰返しの比較評
価を行った結束、従来のものは、約１万回でヒータの断
線が発生するものがあったのに対し、本実施例の含浸型
陰極は、２万回経過してもヒータが断線するという問題
は発生しないという実績を得た。Furthermore, with the conventional bundling, which was compared and evaluated by repeatedly applying heater voltage ON and OFF, the heater broke after about 10,000 cycles, whereas the impregnated cathode of this example We have obtained a track record that the problem of heater disconnection does not occur even after 20,000 cycles.
以上説明したように本発明は、ヒータ足部に金属粉末の
焼結層を被覆形成することにより、ヒータに電圧を印加
した瞬間のラッシュ電流が流れた場合も、このヒータ足
部の温度上昇を軽減する効果がある。As explained above, the present invention prevents the temperature rise of the heater foot even when a rush current flows at the moment a voltage is applied to the heater by coating the heater foot with a sintered layer of metal powder. It has a mitigating effect.
さらには、多数回のヒータ電圧印加ＯＮ、ＯＦＦに対し
てもヒータ断線を防止することができる効果がある。Furthermore, there is an effect that heater disconnection can be prevented even when heater voltage application is turned ON and OFF many times.
図面の簡単な説明
第１図は本発明の一実施例の断面図、第２図は従来の禽
浸型陰（支）の−例の断面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of an example of a conventional immersion shade.
］・・・陰極基体、２・陰極スリーブ、３・・・ろう材
、４，２４・・ヒータ、５・・ヒータ足部、６・・金属
粉末焼結層、７・・・絶縁層、８・・埋込剤。]... Cathode base, 2. Cathode sleeve, 3... Brazing material, 4, 24... Heater, 5... Heater foot, 6... Metal powder sintered layer, 7... Insulating layer, 8 ...embedding agent.
Claims (1)
端開口部に接合された陰極スリーブと、該陰極スリーブ
内に配設され埋込剤により固定されたヒータとを備えた
含浸型陰極において、前記埋込剤から取り出された前記
ヒータの足部の芯線表面が粒径１μｍ以上１０μｍ以下
の金属粉末の焼結層で被覆された事を特徴とする含浸型
陰極。An impregnated cathode comprising a cathode base impregnated with an electron emitting substance, a cathode sleeve with the cathode base joined to an opening at one end, and a heater disposed within the cathode sleeve and fixed with an embedding agent. . An impregnated cathode, characterized in that the surface of the core wire of the foot portion of the heater taken out from the embedding agent is coated with a sintered layer of metal powder having a particle size of 1 μm or more and 10 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1123730A JPH02301933A (en) | 1989-05-16 | 1989-05-16 | Impregnated type cathode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1123730A JPH02301933A (en) | 1989-05-16 | 1989-05-16 | Impregnated type cathode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02301933A true JPH02301933A (en) | 1990-12-14 |
Family
ID=14867932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1123730A Pending JPH02301933A (en) | 1989-05-16 | 1989-05-16 | Impregnated type cathode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02301933A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019160526A (en) * | 2018-03-12 | 2019-09-19 | キヤノン電子管デバイス株式会社 | Impregnated cathode structure |
-
1989
- 1989-05-16 JP JP1123730A patent/JPH02301933A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019160526A (en) * | 2018-03-12 | 2019-09-19 | キヤノン電子管デバイス株式会社 | Impregnated cathode structure |
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