JPH01176622A - Impregnated type cathode composition - Google Patents
Impregnated type cathode compositionInfo
- Publication number
- JPH01176622A JPH01176622A JP63000301A JP30188A JPH01176622A JP H01176622 A JPH01176622 A JP H01176622A JP 63000301 A JP63000301 A JP 63000301A JP 30188 A JP30188 A JP 30188A JP H01176622 A JPH01176622 A JP H01176622A
- Authority
- JP
- Japan
- Prior art keywords
- nickel
- chromium
- sleeve
- melting point
- point metal
- 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
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 238000002844 melting Methods 0.000 claims abstract description 10
- 230000008018 melting Effects 0.000 claims abstract description 9
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 claims abstract description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 6
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 239000011651 chromium Substances 0.000 claims abstract description 6
- 229910000423 chromium oxide Inorganic materials 0.000 claims abstract description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims description 7
- 239000011733 molybdenum Substances 0.000 claims description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 4
- 229910001182 Mo alloy Inorganic materials 0.000 abstract description 2
- 229910052759 nickel Inorganic materials 0.000 abstract description 2
- 239000010955 niobium Substances 0.000 abstract description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 abstract description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 abstract description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 abstract 3
- 229910045601 alloy Inorganic materials 0.000 abstract 3
- 239000000956 alloy Substances 0.000 abstract 3
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 abstract 3
- 229910001257 Nb alloy Inorganic materials 0.000 abstract 1
- 229910001362 Ta alloys Inorganic materials 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000788 chromium alloy Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- MOWMLACGTDMJRV-UHFFFAOYSA-N nickel tungsten Chemical compound [Ni].[W] MOWMLACGTDMJRV-UHFFFAOYSA-N 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は含浸型陰極構体に係り、特に含浸型陰極用スリ
ーブに関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to an impregnated cathode structure, and more particularly to a sleeve for an impregnated cathode.
（従来の技術）
近年、走査線を増加させ、解像度を改善したカラー受像
管や超高周波対応受像管等の開発が要請されている。ま
た、投写管等においても輝度の向上が望まれている。こ
れらの要請に応えるには、陰極からの放出電子密度を大
幅に増大させる必要がある。(Prior Art) In recent years, there has been a demand for the development of color picture tubes with increased scanning lines and improved resolution, picture tubes compatible with ultra-high frequencies, and the like. Furthermore, it is desired to improve the brightness of projection tubes and the like. To meet these demands, it is necessary to significantly increase the density of electrons emitted from the cathode.
含浸型陰極は、酸化物陰極に比べ大きな電流密度が得ら
れ、これまで撮像管、進行波管、クライスロン等の電子
管に用いられてきたが、受像管の分野では特殊用途にの
み限られた。これらの含浸型陰極の構造の一例として第
１図に示すように、ヒータ■はスリーブ■の内側に配設
され、スリーブの一端には内側にエミッタが含浸された
ディスり■を有するカップに）が嵌合されている。この
スリーブは、３本のストライプ■により、ホルダー〇へ
固定される。Impregnated cathodes can obtain larger current densities than oxide cathodes, and have been used in electron tubes such as image pickup tubes, traveling wave tubes, and klythrons, but in the field of picture tubes, they have been used only for special purposes. . As an example of the structure of these impregnated cathodes, as shown in Figure 1, the heater (2) is disposed inside a sleeve (2), and one end of the sleeve is a cup (with a disk (2) with an emitter impregnated inside). are fitted. This sleeve is fixed to the holder 〇 by three stripes ■.
（発明が解決しようとする問題点）
このような含浸型陰極では、酸化物陰極に比べ動作温度
が２００℃程度高く、それだけ多くのヒータ電力を要し
実用上の障害となっている。(Problems to be Solved by the Invention) In such an impregnated cathode, the operating temperature is about 200° C. higher than that of an oxide cathode, and a correspondingly large amount of heater power is required, which is a practical obstacle.
本発明は上記した大きなヒータ電力を抑えた熱効率の良
い含浸型陰極を提供することを目的とする。An object of the present invention is to provide an impregnated cathode with good thermal efficiency, which suppresses the above-mentioned large heater power.
（問題点を解決するための手段）
本発明は、外側が高融点金属、内側がニッケル−クロム
系合金で形成され、内表面がクロム酸化物で被覆された
カソードスリーブを有する含浸型陰極構体である。(Means for Solving the Problems) The present invention provides an impregnated cathode structure having a cathode sleeve formed of a high melting point metal on the outside, a nickel-chromium alloy on the inside, and coated with chromium oxide on the inner surface. be.
（作用）
外側の高融点金属は、高温強度が大きく、含浸型陰極の
寿命中のスリーブ変形を防止することができる。また、
内側のニッケル−クロム系合金は。(Function) The outer high-melting point metal has high high-temperature strength and can prevent sleeve deformation during the life of the impregnated cathode. Also,
The inner nickel-chromium alloy.
その表面にクロムの選択黒化膜を形成させることにより
、ヒータからの輻射熱を有効に吸収することができ、高
エネルギー効率、即ち低消費電力化を実現するものであ
る。By forming a selective blackening film of chromium on the surface, radiant heat from the heater can be effectively absorbed, achieving high energy efficiency, that is, low power consumption.
高融点金属は、モリブデン、タンタル、ニオブ等の単体
又は合金であればよく、ニッケル−クロム系合金はニッ
ケルにクロムを１〜３０重量％含有したものである。ク
ロムは、選択酸化により、表面に輻射率の大きな酸化ク
ロム膜を形成するためのものである。また、ニッケル−
クロム合金にクロムよりも酸化しにくいタングステン、
モリブデン、コバルト等を強化材として含有させる方が
寿命中の電子放射動作上好ましい。また、高融点金属と
しては、量産的にモリブデンを用いるのが好ましく、ス
リーブ加工工程中の熱処理として水素を用いることがで
きる。The high melting point metal may be a single substance or an alloy of molybdenum, tantalum, niobium, etc., and the nickel-chromium alloy is nickel containing 1 to 30% by weight of chromium. Chromium is used to form a chromium oxide film with high emissivity on the surface by selective oxidation. Also, nickel-
Tungsten, which is more difficult to oxidize than chromium, is added to the chromium alloy.
It is preferable to contain molybdenum, cobalt, etc. as a reinforcing material in terms of electron emission operation during the life. Further, as the high melting point metal, it is preferable to use molybdenum for mass production, and hydrogen can be used for heat treatment during the sleeve processing step.
（実施例） 以下、本発明の含浸型陰極構体の一実施例を説明する。(Example) An embodiment of the impregnated cathode structure of the present invention will be described below.
外側にモリブデン、内側にニッケル−２０重量％クロム
−４重量％タングステンをクラッドさせた外径１．６ｍ
ｍ、肉厚２０．のスリーブを引抜法により作製し、長さ
３．５ｍに切断した。露点２０℃の湿水素雰囲気中で、
このスリーブを１０００℃、３０分加熱し、内表面にク
ロム酸化物を形成せしめ黒化させた。このとき、内表面
の熱輻射率は０．２から０．８へ変化することが認めら
れた。Outer diameter 1.6m, clad with molybdenum on the outside and nickel-20wt% chromium-4wt% tungsten on the inside.
m, wall thickness 20. A sleeve was produced by a drawing method and cut into a length of 3.5 m. In a wet hydrogen atmosphere with a dew point of 20°C,
This sleeve was heated at 1000° C. for 30 minutes to form chromium oxide on the inner surface and make it black. At this time, it was observed that the thermal emissivity of the inner surface changed from 0.2 to 0.8.
そこで、本発明のスリーブを用いて第１図に示すような
構造の含浸型陰極とし、２８インチのカラーブラウン管
に組み込んで電子放出特性を評価した。また、比較例と
してモリブデン製のカソードスリーブを使用し九含浸型
陰極を備える２８インチのカラーブラウン管を製作し、
電子放出特性を評価した。その際、カソードスリーブの
外径、肉厚、長さはそれぞれ１．６ｍｍ、 ２０１Ｉ３
．３．５腫と本発明のタララドスリーブと同一とした。Therefore, the sleeve of the present invention was used to make an impregnated cathode with a structure as shown in FIG. 1, and the cathode was incorporated into a 28-inch color cathode ray tube to evaluate electron emission characteristics. In addition, as a comparative example, a 28-inch color cathode ray tube with nine impregnated cathodes was manufactured using a cathode sleeve made of molybdenum.
The electron emission characteristics were evaluated. At that time, the outer diameter, wall thickness, and length of the cathode sleeve were each 1.6 mm, 201I3.
．． 3.5 tumor and the Talarad sleeve of the present invention.
比較品で６．３Ｖ、 ９００＋ａＡでカソード表面の温
度を一定になるようにし、評価したところ７２０ｍＡに
なった。従って電子放出の電流密度２．５Ａ／Ｊが安定
して得られるヒータ電力比は１本発明における陰極が０
．８と比較品よりも約り０％小さい値となった。A comparison product was evaluated at 6.3V and 900+aA to keep the temperature of the cathode surface constant, and the result was 720mA. Therefore, the heater power ratio at which an electron emission current density of 2.5 A/J can be stably obtained is 1 when the cathode in the present invention is 0.
．． 8, which is approximately 0% smaller than the comparative product.
さらに、寿命特性はモリブデン製スリーブを使用した場
合と遜色なく、カソードスリーブの変形に帰因するカラ
ーブラウン管における色づれ等の発生は見られなかった
。Furthermore, the life characteristics were comparable to those using a molybdenum sleeve, and no color shift or the like in the color cathode ray tube due to deformation of the cathode sleeve was observed.
以上説明したように、本発明によればヒータ電力の少な
い熱効率の良好な含浸型陰極構体を実現することができ
る。As described above, according to the present invention, it is possible to realize an impregnated cathode assembly with good thermal efficiency and low heater power.
第１図は含浸型陰極構体を一部切断して示す斜視図であ
る。
■・・・ヒータ ■・・・スリーブ■・・
・ディスク （へ）・・・カップ■・・・スト
ラップ ■・・・ホルダー代理人 弁理士 則
近 憲 佑
同 竹花喜久男FIG. 1 is a partially cutaway perspective view of an impregnated cathode assembly. ■・・・Heater ■・・・Sleeve■・・
・Disc (to)...Cup■...Strap ■...Holder agent Patent attorney Rules
Ken Ken Yudo Kikuo Takehana
Claims (4)
おいて、前記スリーブの外側が高融点金属、内側がニッ
ケル−クロム系合金で形成され、前記スリーブの内表面
をクロム酸化物で被覆したことを特徴とする含浸型陰極
構体。(1) An impregnated cathode structure having a disk and a sleeve, characterized in that the outer side of the sleeve is made of a high melting point metal, the inner side is made of a nickel-chromium alloy, and the inner surface of the sleeve is coated with chromium oxide. Impregnated cathode structure.
タングステン、モリブデン、コバルトの群から選ばれた
少なくとも１つの元素を含有してなることを特徴とする
特許請求の範囲第１項記載の含浸型陰極構体。(2) The impregnated type according to claim 1, wherein the nickel-chromium alloy contains at least one element selected from the group consisting of tungsten, molybdenum, and cobalt. Cathode structure.
する特許請求の範囲第１項記載の含浸型陰極構体。(3) The impregnated cathode structure according to claim 1, wherein the high melting point metal is molybdenum.
０重量％クロム−１〜６重量％タングステンであること
を特徴とする特許請求の範囲第１項記載の含浸型陰極構
体。(4) The nickel-chromium alloy is nickel-1 to nickel-3
The impregnated cathode structure according to claim 1, characterized in that the content is 0% by weight chromium and 1 to 6% by weight tungsten.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63000301A JPH01176622A (en) | 1988-01-06 | 1988-01-06 | Impregnated type cathode composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63000301A JPH01176622A (en) | 1988-01-06 | 1988-01-06 | Impregnated type cathode composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01176622A true JPH01176622A (en) | 1989-07-13 |
Family
ID=11470079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63000301A Pending JPH01176622A (en) | 1988-01-06 | 1988-01-06 | Impregnated type cathode composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01176622A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4143087A1 (en) * | 1990-12-29 | 1992-07-02 | Gold Star Co | Impregnated cathode |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5947857A (en) * | 1982-09-11 | 1984-03-17 | Eiden Kk | System for inserting additional circuit in stereo modulator and demodulator |
| JPS61288339A (en) * | 1985-06-17 | 1986-12-18 | Matsushita Electronics Corp | Indirectly-heated cathode for cathode-ray tube |
-
1988
- 1988-01-06 JP JP63000301A patent/JPH01176622A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5947857A (en) * | 1982-09-11 | 1984-03-17 | Eiden Kk | System for inserting additional circuit in stereo modulator and demodulator |
| JPS61288339A (en) * | 1985-06-17 | 1986-12-18 | Matsushita Electronics Corp | Indirectly-heated cathode for cathode-ray tube |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4143087A1 (en) * | 1990-12-29 | 1992-07-02 | Gold Star Co | Impregnated cathode |
| DE4143087C2 (en) * | 1990-12-29 | 1999-12-02 | Gold Star Co | Impregnated cathode |
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