JPH03163725A - Oxide cathode - Google Patents
Oxide cathodeInfo
- Publication number
- JPH03163725A JPH03163725A JP1299526A JP29952689A JPH03163725A JP H03163725 A JPH03163725 A JP H03163725A JP 1299526 A JP1299526 A JP 1299526A JP 29952689 A JP29952689 A JP 29952689A JP H03163725 A JPH03163725 A JP H03163725A
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- oxide
- cathode
- substrate
- layer
- 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
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000001257 hydrogen Substances 0.000 claims abstract description 12
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 12
- 239000000758 substrate Substances 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 6
- 239000000956 alloy Substances 0.000 claims abstract description 6
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 5
- 229910052804 chromium Inorganic materials 0.000 claims abstract 3
- 229910052759 nickel Inorganic materials 0.000 claims abstract 3
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 229910052735 hafnium Inorganic materials 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract 1
- 150000001342 alkaline earth metals Chemical class 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 12
- 229910018487 Ni—Cr Inorganic materials 0.000 description 2
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
- Solid Thermionic Cathode (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はブラウン管等に用いられる酸化物陰極に係り、
特に、陰極温度および電子放出（エミツション）立上り
時間が安定な酸化物陰極に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an oxide cathode used in cathode ray tubes, etc.
In particular, it relates to an oxide cathode with stable cathode temperature and electron emission rise time.
［従来の技術］
微量の活性金属を含み、その表面に少なくともＢａを含
むアルカリ土類金属の酸化物からなる層を形成したＮｉ
基体と、該基体に固定配置したＮｉ−Ｃｒ合金製のスリ
ーブとからなる酸化物陰極では、ヒータからの熱吸収を
良くしてエミッションの立上り時間を短くする目的で、
スリーブ表面にＣｒの酸化物の層を形成する。この場合
、Ｃｒの酸化物の層は、通常、スリーブを湿潤水素ある
いはこれを主体とする雰囲気中で加熱することにより形
成する．
なお、Ｎｉ−Ｃｒ製のスリーブを有する陰極については
、例えば、特開昭５１ − １０７５６号公報等に開示
されている。[Prior Art] Ni contains a trace amount of active metal and has a layer of an alkaline earth metal oxide containing at least Ba formed on its surface.
In an oxide cathode consisting of a base and a Ni-Cr alloy sleeve fixed to the base, in order to improve heat absorption from the heater and shorten the emission rise time,
A layer of Cr oxide is formed on the surface of the sleeve. In this case, the Cr oxide layer is usually formed by heating the sleeve in wet hydrogen or an atmosphere mainly composed of hydrogen. Note that a cathode having a sleeve made of Ni-Cr is disclosed in, for example, Japanese Patent Laid-Open No. 10756/1983.
［発明が解決しようとする課題］
しかしながら、上記Ｃｒ酸化物層の形或はスリーブがそ
れまでに受けた加工、熱処理等の前歴の影響を受け不安
定であるため、僅かな工程条件の変動によって変動し、
従って、その熱吸収効率が変動するため、エミッション
の立上り時間が変動するだけでなく、カソード温度も変
動して、短寿命やエミッションスランプの原因となるな
どの問題があった。[Problems to be Solved by the Invention] However, since the shape of the Cr oxide layer or the sleeve is unstable due to the influence of the previous history of processing, heat treatment, etc., fluctuate,
Therefore, since the heat absorption efficiency fluctuates, not only the emission rise time fluctuates, but also the cathode temperature fluctuates, causing problems such as short life and emission slump.
本発明の目的は、上記従来技術の有していた課題を解決
して、Ｃｒ酸化物層の形威を促進かつ均一化して、陰極
温度およびエミッション立上り時間の安定な酸化物陰極
を提供することにある。An object of the present invention is to solve the above-mentioned problems of the prior art and to provide an oxide cathode with stable cathode temperature and emission rise time by promoting and uniformizing the shape of the Cr oxide layer. It is in.
［課題を解決するための手段］
上記目的は、微量の活性金属を含み、その表面に少なく
とも Ｂａを含むアルカリ土類金属の酸化物からなる層
を形威したＮｉ基体と、該基体に固定配置したスリーブ
とからなる酸化物陰極において、上記スリーブを、Ｎｉ
およびＣｒを主材料とし、これにＴｉ％Ｚｒ，Ｈｆの中
から選ばれる少なくとも一種の元素を重量比０．１〜ｌ
Ｏ％の範囲で含んだ合金からなり、かつ、湿潤水素ある
いはこれを主体とする雰囲気中で加熱することによりそ
の表面にＣｒを主体とする酸化物の層を形成したスリー
ブとする酸化物陰極とすることによって達成することが
できる。[Means for Solving the Problems] The above object is to provide a Ni substrate containing a trace amount of active metal and having a layer of an alkaline earth metal oxide containing at least Ba on its surface, and a Ni substrate fixedly disposed on the substrate. In the oxide cathode, the sleeve is made of Ni.
and Cr as the main material, and at least one element selected from Ti%Zr, Hf in a weight ratio of 0.1 to 1
An oxide cathode having a sleeve made of an alloy containing Cr in the range of 0% and having a layer of an oxide mainly composed of Cr formed on its surface by heating in wet hydrogen or an atmosphere mainly composed of hydrogen. This can be achieved by
［作用］
スリーブ材料を上記内容の材料とし、これを上記条件下
で加熱処理することによって、スリーブ表面におけるＣ
ｒ酸化物層の形成が促進、かつ、均一化され、さらにＴ
ｉ， Ｚｒ，あるいはＨｆ自体も酸化物を形成してスリ
ーブの熱吸収効率を向上させるため、陰極温度およびエ
ミッション立上り時間が安定化する。[Operation] By using the sleeve material as described above and heat-treating it under the above conditions, C on the sleeve surface can be reduced.
The formation of the r oxide layer is promoted and made uniform, and the T
Since i, Zr, or Hf itself forms oxides and improves the heat absorption efficiency of the sleeve, the cathode temperature and emission rise time are stabilized.
［実施例］
以下、本発明の酸化物陰極について、実施例によって具
体的に説明する。[Example] Hereinafter, the oxide cathode of the present invention will be specifically explained with reference to Examples.
実施例 ｌ
第１図は本発明酸化物陰極の一実施例の構成を示す断面
図で、微量の活性金属を含むＮｉ基体ｌ、該基体１上に
設けた少なくともＢａを含むアルカリ土類金属酸化物層
２、レーザ溶接により基体１に固定配置したＮｉ−２０
％Ｃｒ−０，５％Ｔｊ製スリーブ３からなることを示す
。また、４は陰極を加熱するためのヒータを示す。ここ
で、上記スリーブ３は、露点２０℃の湿潤水素雰囲気中
で９２０℃ ８分間加熱して、その表面にＣｒを主体と
する酸化物層を形威させたものを用いた。Embodiment 1 FIG. 1 is a sectional view showing the structure of an embodiment of the oxide cathode of the present invention, in which a Ni substrate 1 containing a trace amount of active metal, an alkaline earth metal oxide containing at least Ba provided on the substrate 1. Material layer 2, Ni-20 fixedly arranged on the base 1 by laser welding
It shows that the sleeve 3 is made of %Cr-0.5%Tj. Further, 4 indicates a heater for heating the cathode. Here, the sleeve 3 was heated at 920° C. for 8 minutes in a wet hydrogen atmosphere with a dew point of 20° C. to form an oxide layer mainly composed of Cr on its surface.
上記構威の本発明の酸化物陰極と、スリーブにＴｉ１Ｚ
ｒ％Ｈｆを含まないＮｉ−２０％Ｃｒ合金を用いた従来
構成の酸化物陰極とをブラウン管に実装して、それらの
エミッション特性の比較測定を行った。その結果、本発
明構威の酸化物陰極は従来構成の酸化物陰極と比べて、
エミッション立上り時間（陽極電流が４５０ｕＡ に達
するまでに要する時間）が約７％短縮され、また、陰極
温度も分布幅が約３０％狭まるという結果が得られた。The oxide cathode of the present invention having the above structure and Ti1Z in the sleeve.
An oxide cathode having a conventional configuration using a Ni-20%Cr alloy that does not contain r%Hf was mounted on a cathode ray tube, and their emission characteristics were compared and measured. As a result, compared to the oxide cathode of the conventional structure, the oxide cathode of the present invention has
The results showed that the emission rise time (the time required for the anode current to reach 450 uA) was shortened by about 7%, and the cathode temperature distribution width was narrowed by about 30%.
以上、スリーブ材料としてＮｉ−２０％Ｃ ｒ−０，
５％Ｔｉを用い、これを湿潤水素雰囲気中で加熱するこ
とによってその表面にＣｒを主体とする酸化物層を形成
した場合の例について説明したが、上記Ｔｉの代りにＺ
ｒ， Ｈｆ，あるいはそれらを複合添加した合金を用い
た場合にも同様の結果が得られた。また、スリーブを加
熱酸化させる雰囲気として、上記湿潤水素の代りに水蒸
気を含んだ水素と窒素との混合ガスを用いた場合にも同
様の結果が得られ、さらには、Ｎｉ−Ｃｒ合金中のＣｒ
を選択的に酸化し得る雰囲気であればなんでも用いるこ
とができる。Above, the sleeve material is Ni-20%Cr-0,
An example was explained in which an oxide layer mainly composed of Cr was formed on the surface of 5% Ti by heating it in a wet hydrogen atmosphere.
Similar results were obtained when using alloys containing r, Hf, or a combination of them. Similar results were also obtained when a mixed gas of hydrogen and nitrogen containing water vapor was used instead of the wet hydrogen as the atmosphere for heating and oxidizing the sleeve.
Any atmosphere that can selectively oxidize can be used.
なお、Ｔｉ，Ｚｒ，Ｈｆの添加量は、熱吸収効率を向上
させるためには０．１％以上とすることが望ましく、ま
た、加工性を維持するためには１０％以下とする必要が
ある６
［発明の効果］
以上述べてきたように、ブラウン管等に用いられる酸化
物陰極を本発明構或の陰極とすることによって、ヒータ
からの熱吸収効率を向上させるためのＣｒを主体とする
酸化物膜をスリーブ表面に安定、かつ、均一に形或する
ことができるため、エミッション立上り時間および陰極
温度の安定した酸化物陰極を得ることができた。Note that the amount of Ti, Zr, and Hf added is preferably 0.1% or more in order to improve heat absorption efficiency, and it is necessary to be 10% or less in order to maintain workability. 6 [Effects of the Invention] As described above, by using the oxide cathode used in cathode ray tubes, etc. as the cathode of the present invention, Cr-based oxide can be used to improve the heat absorption efficiency from the heater. Since the chemical film could be stably and uniformly formed on the sleeve surface, an oxide cathode with stable emission rise time and cathode temperature could be obtained.
第１図は本発明酸化物陰極の一実施例の構成を示す断面
図である。
１・・・Ｎｉ基体、２・・・アルカリ土類金属酸化物層
、３・・・スリーブ、
４・・・ヒータ
１〜−−−−−Ｎｉ巻体
２−−−−−−アノレカリ上類金Ｊ，わ（イと物層３−
−−−−−スリーフ“
４−−−−−−ヒータFIG. 1 is a sectional view showing the structure of an embodiment of the oxide cathode of the present invention. DESCRIPTION OF SYMBOLS 1...Ni base, 2...Alkaline earth metal oxide layer, 3...Sleeve, 4...Heater 1-----Ni winding body 2--Anolekali upper class Kim J, Wa (I and Monolayer 3-
−−−−−Sleeve “4−−−−−Heater
Claims (1)
を含むアルカリ土類金属の酸化物からなる層を形成した
Ｎｉ基体と、該基体に固定配置したスリーブとからなる
酸化物陰極において、上記スリーブが、ＮｉおよびＣｒ
を主材料とし、これにＴｉ、Ｚｒ、Ｈｒの中から選ばれ
る少なくとも一種の元素を重量比０．１〜１０％の範囲
で含んだ合金からなり、かつ、湿潤水素あるいはこれを
主体とする雰囲気中で加熱することによりその表面にＣ
ｒを主体とする酸化物の層を形成したスリーブであるこ
とを特徴とする酸化物陰極。1. Contains a trace amount of active metal, with at least Ba on the surface
An oxide cathode comprising a Ni substrate on which a layer of an alkaline earth metal oxide containing Ni and a sleeve is fixedly arranged on the substrate, wherein the sleeve is made of Ni and Cr.
The main material is an alloy containing at least one element selected from Ti, Zr, and Hr in a weight ratio of 0.1 to 10%, and wet hydrogen or an atmosphere mainly composed of hydrogen. C on the surface by heating inside
An oxide cathode characterized in that it is a sleeve formed with an oxide layer mainly composed of r.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1299526A JPH03163725A (en) | 1989-11-20 | 1989-11-20 | Oxide cathode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1299526A JPH03163725A (en) | 1989-11-20 | 1989-11-20 | Oxide cathode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03163725A true JPH03163725A (en) | 1991-07-15 |
Family
ID=17873739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1299526A Pending JPH03163725A (en) | 1989-11-20 | 1989-11-20 | Oxide cathode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03163725A (en) |
-
1989
- 1989-11-20 JP JP1299526A patent/JPH03163725A/en active Pending
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