JPS6055942B2 - Cathode manufacturing method - Google Patents

Cathode manufacturing method

Info

Publication number
JPS6055942B2
JPS6055942B2 JP50102809A JP10280975A JPS6055942B2 JP S6055942 B2 JPS6055942 B2 JP S6055942B2 JP 50102809 A JP50102809 A JP 50102809A JP 10280975 A JP10280975 A JP 10280975A JP S6055942 B2 JPS6055942 B2 JP S6055942B2
Authority
JP
Japan
Prior art keywords
cathode
nickel
layer
manufacturing
reducing agent
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.)
Expired
Application number
JP50102809A
Other languages
Japanese (ja)
Other versions
JPS5227260A (en
Inventor
紘一郎 住
明男 大越
喜一 植野
昭一 村本
虎雄 青塚
昭彦 阿部
英昭 中川
昭 中山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP50102809A priority Critical patent/JPS6055942B2/en
Publication of JPS5227260A publication Critical patent/JPS5227260A/en
Publication of JPS6055942B2 publication Critical patent/JPS6055942B2/en
Expired legal-status Critical Current

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  • Electrodes For Cathode-Ray Tubes (AREA)
  • Solid Thermionic Cathode (AREA)

Description

【発明の詳細な説明】 本発明は、例えば陰極線管、真空管等に使用されるカ
ソードの製法に係わる。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing cathodes used, for example, in cathode ray tubes, vacuum tubes, and the like.

従来のカソードの製法としては、BaCO。 The conventional cathode manufacturing method is BaCO.

、(Ba−Br)CO3又は(Ba−Br−Ca)CO
3等の各炭酸塩粉末をニトロセルロースの如き有機バイ
ンダ及び酢酸イソアミル又は酢酸エチルの如き有機溶媒
にて懸濁液を作り、これを陰極基体金属(ベースメタル
)上に吹付け、浸漬、泳動電着等によつて被覆して後、
管に組込み排気、熱活性、エージング等の工程を経て工
ミッションを得るようにしている。 又、高電流密度に
耐えるカソードの場合には、例えば上記の炭酸塩粉末と
ニッケルNiの如き金属粉末とタングステンW)タンタ
ルTaNNi−W合金等の還元剤を混合して成る混合物
を陰極基体金属上にプレス、焼結して被覆し、以後排気
、熱活性、エージング工程を経て工ミッションを得るよ
うにする製法が考えられる。
, (Ba-Br)CO3 or (Ba-Br-Ca)CO
A suspension of each carbonate powder such as No. 3 is prepared in an organic binder such as nitrocellulose and an organic solvent such as isoamyl acetate or ethyl acetate, and this suspension is sprayed onto the cathode base metal, immersed, and electrophoretically applied. After covering with
It is assembled into a pipe and undergoes processes such as evacuation, thermal activation, and aging to obtain a working mission. In addition, in the case of a cathode that can withstand high current density, for example, a mixture made by mixing the carbonate powder described above, a metal powder such as nickel (Ni), and a reducing agent such as tungsten (W), tantalum (TaNNi-W) alloy, etc., is applied onto the cathode base metal. A possible manufacturing method is to press, sinter, coat, and then pass through exhaust, heat activation, and aging steps to obtain a finish.

しかし乍ら、前者の吹付、浸漬、泳動電着等による製
法では、量産時においてその熱電子放出物質層の層厚の
コントロールが難かしい。
However, in the former method of manufacturing by spraying, dipping, electrophoretic electrodeposition, etc., it is difficult to control the layer thickness of the thermionic emission material layer during mass production.

すなわち、吹付法では吹付銃の詰りにより層厚にバラツ
キが生じ、また浸漬法及び泳動電着法においては液の管
理が困難である。さらに吹付法では懸濁液の無駄が多く
懸濁液の利用効率の点で劣つている。後者の焼結による
製法ては製造工程が複雑となる欠点があつた。 本発明
には、上述の点に鑑み、印刷により信造工程の簡略化を
図ると共に初期工ミッション特性を良好ならしめ且つ工
ミッションの寿命を保証することができるようにしたカ
ソードの製法を提供せんとするものである。
That is, in the spraying method, the layer thickness varies due to clogging of the spray gun, and in the dipping method and electrophoretic electrodeposition method, it is difficult to control the liquid. Furthermore, the spraying method wastes a lot of suspension and is inferior in terms of suspension utilization efficiency. The latter manufacturing method using sintering had the disadvantage that the manufacturing process was complicated. In view of the above-mentioned points, the present invention provides a cathode manufacturing method that simplifies the reliability manufacturing process by printing, improves the initial manufacturing characteristics, and guarantees the life of the manufacturing process. That is.

本発明に於ては、例けばBaC0。 In the present invention, for example, BaC0.

、(Ba−Br)C03(Ba−Br−Ca)COaの
如きアルカリ土類金属の炭酸塩粉末と陰極基体金属すな
わちニツケルータングステンーマンガン合金、ニッケル
−タングステン合金、ニッケル−アルミニウム合金、ニ
ッケル−シリコン合金、ニッケル−モリブデン合金等の
如きニッケル及び還元剤の合金粉末とを混合し、この混
合物を例えばエチルセルロース、ニトロセルロース等の
有機バインダーと、このバインダーを溶解する有機溶媒
にて印刷に適したペースト状体とし、このペースト状体
を加熱され所定電位が与えられる基体上に印刷し、カソ
ード物質層を形成するものである。次にこのカソード物
質層を例えは陰極線管或は真空管等に組込み、通常の排
気、分解、熱活性、エージング工程を経て工ミッション
をとり出すようになす。下記に上述のカソード物質とな
るペースト状体の実施例を示す。
, (Ba-Br)C03(Ba-Br-Ca)COa and a cathode base metal such as nickel-tungsten-manganese alloy, nickel-tungsten alloy, nickel-aluminum alloy, nickel-silicon. An alloy powder of nickel and a reducing agent such as a nickel-molybdenum alloy or a nickel-molybdenum alloy is mixed, and this mixture is mixed with an organic binder such as ethyl cellulose or nitrocellulose and an organic solvent that dissolves this binder to form a paste suitable for printing. This paste-like material is printed on a substrate that is heated and given a predetermined potential to form a cathode material layer. This cathode material layer is then incorporated into, for example, a cathode ray tube or a vacuum tube, and subjected to conventional evacuation, decomposition, thermal activation, and aging steps to extract the material. Examples of the paste-like material serving as the above-mentioned cathode material are shown below.

アルカリ土類金属の炭酸塩 50fニッケル
−タングステン合金粉末(タングステン25%含有 粒
径10μ)50yエチルセルロース
4yカルビトール(UCC社製) 13y
ベンジルアルコール(溶剤) 13y上記の各
成分を最終的に得られるカソード物質に影響を与ないボ
ールミル用ポット(例えばアルミナ製)に入れ、ボール
もアルミナ製とし、30〜100r′.P.mで攪拌し
ペースト状体を得る。
Alkaline earth metal carbonate 50f nickel-tungsten alloy powder (contains 25% tungsten, particle size 10μ) 50y ethyl cellulose
4y Carbitol (manufactured by UCC) 13y
Benzyl alcohol (solvent) 13y Place each of the above components into a ball mill pot (made of alumina, for example) that does not affect the final cathode material, use an alumina ball as well, and heat for 30 to 100 r'. P. Stir at m to obtain a paste.

攪拌、混合の方法はボールを用いなくともよく、その他
の方法も考えられる。尚、上記炭酸塩とニッケル−タン
グステン合金粉末との混合比としては、炭酸塩:ニツケ
ルータングステン合金粉末=50:50.が好適である
が、10:90〜90:10の範囲においても可能であ
る。また、上記溶剤は乾きにくいように適度の蒸気圧を
有することが望ましく、例えばエチルカルビトール等も
使用できる。次に、第1図及び第2図を用いて本発明の
製法.を平面形積層カソードに適用した場合につき説明
する。
The method of stirring and mixing does not require the use of a ball, and other methods may also be considered. The mixing ratio of the carbonate and the nickel-tungsten alloy powder is carbonate:nickel-tungsten alloy powder = 50:50. is preferable, but a range of 10:90 to 90:10 is also possible. Further, it is desirable that the above-mentioned solvent has an appropriate vapor pressure so as not to dry easily, and for example, ethyl carbitol and the like can be used. Next, the manufacturing method of the present invention will be described using FIGS. 1 and 2. The case where this is applied to a planar laminated cathode will be explained.

第1図及び第2図はトリニトロン(登録商標)型カラー
陰極線管用のもので、傍熱形構成を採る平面形積層カソ
ードである。
1 and 2 are for a Trinitron® type color cathode ray tube, which is a planar laminated cathode having an indirectly heated configuration.

本発明においては、耐熱性絶縁基板例えばセラミックよ
りなる平板状の基板1上にタングステンWのみ或はトリ
ウムn1レニウムReの一種又は双方が添加されたタン
グステンWより成り帯状をなす発熱体層即ち通電により
ジュール熱を生ずるヒータ層2を被着形成する。このヒ
ータ層2は基板1上の3部分に於て夫々密度を大とした
ジグザグ模様状の主ヒータ部3R,3G及び3Bと基板
周辺部分を繞る如き副ヒータ部4とを有して成り、主ヒ
ータ部3R,3G及び3Bで局部的に高温加熱されるよ
うになす。この場合、各主ヒータ部3R,3G及び3B
と副ヒータ部4は図示のように互に直列接続し両端5A
及び5Bを給電点とする。このヒータ層2・上に絶縁層
例えばアルミナ層6を被覆する。次に、このアルミナ層
6上の各主ヒータ部3R,3G及び3Bに対応する位置
に夫々例えばタングステンよりなるカソード電極層7を
被着し、各カソード電極層7上に夫々上述のアルカリ土
類炭酸塩粉末8とニッケルN1及び還元剤の合金粉末9
と有機バインダーと溶媒とより成るペースト状体を印刷
し、カソード物質層10を形成する。ここで、カソード
電極層7上には必要に応じて電気伝導性を向上させるた
めのニッケルNiメッキ11を施す。なお12は各カソ
ード電極層7より基板の側方に延長するリード部で、こ
の各リード部12の端部よりカソード電位を与えるに供
するカソード端子13R,13G及び13Bを導出する
。14A及び14Bはヒータ電源端子である。
In the present invention, on a flat plate-shaped substrate 1 made of a heat-resistant insulating substrate, for example, ceramic, a band-shaped heating element layer made of tungsten W alone or tungsten W to which one or both of thorium n1 rhenium Re is added is formed. A heater layer 2 that generates Joule heat is deposited. This heater layer 2 has main heater parts 3R, 3G, and 3B in a zigzag pattern with increased density in three parts on the substrate 1, and a sub-heater part 4 that extends around the peripheral part of the substrate. , the main heater parts 3R, 3G, and 3B locally heat to a high temperature. In this case, each main heater section 3R, 3G and 3B
and the sub-heater part 4 are connected in series to each other as shown in the figure, and the voltage at both ends is 5A.
and 5B are the power feeding points. This heater layer 2 is coated with an insulating layer, for example, an alumina layer 6. Next, a cathode electrode layer 7 made of, for example, tungsten is deposited on the alumina layer 6 at a position corresponding to each of the main heater parts 3R, 3G, and 3B. Carbonate powder 8, nickel N1 and reducing agent alloy powder 9
A paste-like material consisting of an organic binder and a solvent is printed to form a cathode material layer 10. Here, nickel Ni plating 11 is applied on the cathode electrode layer 7 as necessary to improve electrical conductivity. Note that 12 is a lead portion extending from each cathode electrode layer 7 to the side of the substrate, and cathode terminals 13R, 13G, and 13B for applying a cathode potential are led out from the end of each lead portion 12. 14A and 14B are heater power supply terminals.

斯くして平面形積層カソード15を得る。上述せる本発
明によれば、印刷によつてカソード物質層10の形成が
できるので、カソードの製造工程が簡略化され、またカ
ソード物質層10の層厚のコントロールが良好となり且
つ剥離されにくく信頼性の高いカソードが得られる。
In this way, a planar laminated cathode 15 is obtained. According to the present invention described above, since the cathode material layer 10 can be formed by printing, the cathode manufacturing process is simplified, and the layer thickness of the cathode material layer 10 can be well controlled, and it is difficult to peel off and is reliable. A high cathode can be obtained.

又、カソード物質層10は従来のカソード材である炭酸
塩とベースメタルである金属即ちニッケルと還元剤の合
金による混合物をもつて構成しているので、炭酸塩と還
元剤との接触面積が大きくなり初期工ミッション特性を
良好にする。
Furthermore, since the cathode material layer 10 is composed of a mixture of an alloy of carbonate, which is a conventional cathode material, nickel, which is a base metal, and a reducing agent, the contact area between the carbonate and the reducing agent is large. This improves the initial engineering mission characteristics.

さらに工ミッションの寿命は還元剤の出方で決まるもの
であるが、本発明では還元剤の拡散が長時間に亘つて行
なわれ得るので工ミッションの長寿命化が図れるもので
ある。尚、上例においては陰極線管の平面形積層カソー
ドの製造に適用したが、他の一般の陰極線管あるいは真
空管のカソードの製造にも適用できる。
Further, the life of the machining mechanism is determined by the way the reducing agent is released, and in the present invention, the reducing agent can be diffused over a long period of time, so that the life of the machining mechanism can be extended. In the above example, the present invention was applied to the manufacture of a planar laminated cathode for a cathode ray tube, but it can also be applied to the manufacture of cathodes for other general cathode ray tubes or vacuum tubes.

さらに表示管に於て、その表示部となる所定パターンの
カソード部の製造にも適用できる。
Furthermore, the present invention can also be applied to manufacturing a cathode portion having a predetermined pattern that becomes the display portion of a display tube.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明を平面形積層カソードに適用した場合の
平面図、第2図はその要部の拡大断面図である。 1は絶縁基板、2はヒータ層、7はカソード電極層、8
は炭酸塩、9はニッケルと還元剤との合金粉末、10は
カソード物質である。
FIG. 1 is a plan view when the present invention is applied to a planar laminated cathode, and FIG. 2 is an enlarged sectional view of the main parts thereof. 1 is an insulating substrate, 2 is a heater layer, 7 is a cathode electrode layer, 8
is a carbonate, 9 is an alloy powder of nickel and a reducing agent, and 10 is a cathode material.

Claims (1)

【特許請求の範囲】[Claims] 1 加熱され所定電位が与えられるカソード電極上に、
アルカリ土類金属の炭酸塩粉末とニッケル及び還元剤の
合金粉末と有機バインダー及び有機溶媒とより成るペー
スト状体を印刷し、カソード物質層を形成するようにし
たことを特徴とするカソードの製法。
1 On the cathode electrode which is heated and given a predetermined potential,
A method for producing a cathode, comprising printing a paste-like material consisting of an alkaline earth metal carbonate powder, an alloy powder of nickel and a reducing agent, an organic binder, and an organic solvent to form a cathode material layer.
JP50102809A 1975-08-25 1975-08-25 Cathode manufacturing method Expired JPS6055942B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50102809A JPS6055942B2 (en) 1975-08-25 1975-08-25 Cathode manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50102809A JPS6055942B2 (en) 1975-08-25 1975-08-25 Cathode manufacturing method

Publications (2)

Publication Number Publication Date
JPS5227260A JPS5227260A (en) 1977-03-01
JPS6055942B2 true JPS6055942B2 (en) 1985-12-07

Family

ID=14337365

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50102809A Expired JPS6055942B2 (en) 1975-08-25 1975-08-25 Cathode manufacturing method

Country Status (1)

Country Link
JP (1) JPS6055942B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS587740A (en) * 1981-06-30 1983-01-17 インタ−ナシヨナル・ビジネス・マシ−ンズ・コ−ポレ−シヨン Electron emission layer
JPS6445039A (en) * 1987-08-13 1989-02-17 Sony Corp Manufacture of electron tube cathode device

Also Published As

Publication number Publication date
JPS5227260A (en) 1977-03-01

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