JP3020270B2 - Manufacturing method of mash type cathode - Google Patents
Manufacturing method of mash type cathodeInfo
- Publication number
- JP3020270B2 JP3020270B2 JP2329714A JP32971490A JP3020270B2 JP 3020270 B2 JP3020270 B2 JP 3020270B2 JP 2329714 A JP2329714 A JP 2329714A JP 32971490 A JP32971490 A JP 32971490A JP 3020270 B2 JP3020270 B2 JP 3020270B2
- Authority
- JP
- Japan
- Prior art keywords
- nickel particles
- particles
- base metal
- type cathode
- porosity
- 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 - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ベース金属上に形成したニッケル粒子の焼
結体の気孔内に熱電子放射物質を塗り込んだマッシュ型
カソードの製造方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for producing a mash-type cathode in which thermionic emission material is applied to pores of a sintered body of nickel particles formed on a base metal.
第３図は従来のマッシュ型カソードの製造方法の一例
を示す。FIG. 3 shows an example of a conventional method for manufacturing a mash type cathode.
図において１は金属、２はベース金属、３はニッケル
粒子、６は熱電子放射物質、７はヒータである。In the figure, 1 is a metal, 2 is a base metal, 3 is nickel particles, 6 is a thermionic emission material, and 7 is a heater.
金型１に基体となるベース金属２（通常、ニッケル、
モリブデン等でできている）を挿入し、その上に、粒径
が５〜100μｍのニッケル粒子３を所定の厚さに堆積す
る〔図（ａ）〕。この際、ニッケル粒子３の層の厚さを
均一にするため、振動を加えたり、場合によってはプレ
ス機を使用して圧力を加える。A base metal 2 (usually nickel,
(Made of molybdenum or the like), and nickel particles 3 having a particle size of 5 to 100 μm are deposited thereon to a predetermined thickness [FIG. At this time, in order to make the thickness of the layer of the nickel particles 3 uniform, vibration is applied, or in some cases, pressure is applied using a press machine.
続いて、ベース金属２上に堆積したニッケル粒子３を
水素雰囲気中又は真空中で900〜1,300℃まで加熱し、焼
結させる。Subsequently, the nickel particles 3 deposited on the base metal 2 are heated to 900 to 1,300 ° C. in a hydrogen atmosphere or vacuum to be sintered.
金型１に入れたまま焼結させてもよく、図（ｂ）に示
すように金型１から取り出して焼結させてもよい。The sintering may be carried out while being placed in the mold 1, or may be taken out from the mold 1 and sintered as shown in FIG.
次に、焼結体のニッケル粒子３間の隙間すなわち気孔
内に熱電子放射物質６を塗り込み〔図（ｃ）〕、スリー
ブにベース金属２を溶接して取付け、ヒータ７を組み込
み、一体の構造のカソードに組み立てる〔図（ｄ）〕。Next, thermionic emission material 6 is applied to the gaps between the nickel particles 3 of the sintered body, that is, the pores [FIG. (C)], the base metal 2 is attached to the sleeve by welding, and the heater 7 is incorporated. Assemble to the cathode having the structure [FIG.
この種のカソードでは、寿命が焼結体の気孔内に塗り
込んだ熱電子放射物質の量に左右されるので、長寿命化
を計るには、焼結体の気孔率を大きくする必要がある。In this type of cathode, the life depends on the amount of thermionic emission material applied to the pores of the sintered body, so that it is necessary to increase the porosity of the sintered body in order to extend the life. .
しかるに、従来の製造方法では、焼結体の気孔率をニ
ッケル粒子３の大きさによってほとんど決まり、粒径が
５〜100μｍのニッケル粒子３では気孔率が10〜20％程
度のものしか得られない。However, in the conventional manufacturing method, the porosity of the sintered body is almost determined by the size of the nickel particles 3, and the nickel particles 3 having a particle size of 5 to 100 μm can only obtain a porosity of about 10 to 20%. .
また、従来の方法でも、金型１内でニッケル粒子３に
加えるプレス圧力を変えることにより、多少気孔率を制
御できるが、再現性が悪く、気孔率の大きさのコントロ
ールが困難であった。Also, in the conventional method, the porosity can be controlled to some extent by changing the pressing pressure applied to the nickel particles 3 in the mold 1, but the reproducibility is poor, and it is difficult to control the size of the porosity.
本発明は上記の事情に鑑みてなされたもので、同程度
の粒径のニッケル粒子で従来より気孔率の大きいものを
得ることができ、気孔率の大きさを容易にコントロール
できる方法を提供することを目的とする。The present invention has been made in view of the above circumstances, and provides a method capable of obtaining nickel particles having substantially the same particle size and having a higher porosity than conventional ones, and easily controlling the size of the porosity. The purpose is to:
本発明の製造方法は、ベース金属上のニッケル粒子の
焼結体を、粒径が５〜100μｍのニッケル粒子に該ニッ
ケル粒子の焼結温度より低い温度で分解気化する粒径が
上記ニッケル粒子と同程度の有機物ポリマー粉末粒子を
所定の割合で混合した粉末をベース金属上に堆積し、水
素雰囲気中又は真空中で加熱、上記ニッケル粒子を燃焼
させて形成するものである。The production method of the present invention is characterized in that a sintered body of nickel particles on a base metal is converted into nickel particles having a particle size of 5 to 100 μm at a temperature lower than the sintering temperature of the nickel particles. A powder in which organic polymer powder particles of the same degree are mixed at a predetermined ratio is deposited on a base metal, heated in a hydrogen atmosphere or in a vacuum, and burns the nickel particles to form the powder.
上記の方法によると、ニッケル粒子の間に適当に有機
物ポリマー粉末粒子が挟まり、ニッケル粒子間の間隔が
広がり、有機物ポリマー粉末粒子が分解気化したあとに
大きな隙間ができ、気孔率が高くなる。According to the above method, the organic polymer powder particles are appropriately sandwiched between the nickel particles, the interval between the nickel particles is widened, and a large gap is formed after the organic polymer powder particles are decomposed and vaporized, thereby increasing the porosity.
第１図は本発明の一実施例を示す。 FIG. 1 shows an embodiment of the present invention.
図において1,2,3,6,7は第３図の同一符号と同一また
は相当するものを示し、５は粒径が５〜100μｍのニッ
ケル粒子３にニッケル粒子３の焼結温度より低い温度で
分解気化する粒径がニッケル粒子３と同程度の有機物ポ
リマー粉末粒子を所定の割合で混合した粉末である。In the figure, 1,2,3,6,7 are the same or corresponding to the same reference numerals in FIG. 3, and 5 is a temperature lower than the sintering temperature of nickel particles 3 having a particle size of 5 to 100 μm. This is a powder obtained by mixing organic polymer powder particles having a particle size that is decomposed and vaporized in the same manner as the nickel particles 3 at a predetermined ratio.
金型１に基体となるベース金属２を挿入し、そのベー
ス金属２上に、ニッケル粒子３に有機物ポリマー粉末粒
子を所定の割合で混合した粉末５を所定の厚さに堆積し
〔図（ａ）〕、水素雰囲気中又は真空中で加熱し、粉末
５中の有機物ポリマー粉末粒子を分解気化させ、温度を
900〜1,300℃まで上げてニッケル粒子３を焼結させる
〔図（ｂ）〕。A base metal 2 serving as a base is inserted into a mold 1, and a powder 5 obtained by mixing organic polymer powder particles with nickel particles 3 at a predetermined ratio is deposited on the base metal 2 to a predetermined thickness [FIG. )], Heated in a hydrogen atmosphere or in a vacuum to decompose and vaporize the organic polymer powder particles in the powder 5, and reduce the temperature.
The temperature is raised to 900 to 1,300 ° C. to sinter the nickel particles 3 [FIG.
続いて、従来と同じ手順により、焼結体の気孔内に熱
電子放射物質６を塗り込み〔図（ｃ）〕、スリーブに取
付け、ヒータ７を組み込み、一体の構造のカソードに組
み立てる〔図（ｄ）〕。Subsequently, the thermoelectron emitting substance 6 is applied to the pores of the sintered body by the same procedure as in the prior art [FIG. (C)], attached to the sleeve, the heater 7 is assembled, and the cathode having an integral structure is assembled [FIG. d)].
第２図は本発明の方法によって気孔率が大きくなる状
況を示す。FIG. 2 shows a situation where the porosity is increased by the method of the present invention.
図において2,3は第１図の同一符号と同一のものを示
し、４はニッケル粒子３の焼結温度より低い温度で分解
気化する粒径がニッケル粒子３と同程度の有機物ポリマ
ー粉末粒子であり、図（ａ）は焼結前、図（ｂ）は焼結
後の状態を示す。In the figure, reference numerals 2 and 3 denote the same components as those shown in FIG. The figure (a) shows the state before sintering, and the figure (b) shows the state after sintering.
焼結後、有機物ポリマー粉末粒子４の分解気化したあ
とに大きな隙間ができ、気孔率が大きくなる。After sintering, large gaps are formed after the organic polymer powder particles 4 are decomposed and vaporized, and the porosity increases.
なお、使用する有機物ポリマーは、ニッケル粒子３の
焼結温度より低い温度で分解気化するものであればよ
く、例えば、メタクリル酸メチル、メタクリル酸イソブ
チル、ｎ−アクリル酸メチルを初め、アクリル系樹脂や
ポリエステル系、ビニル系樹脂等でもよい。The organic polymer to be used may be any one that can be decomposed and vaporized at a temperature lower than the sintering temperature of the nickel particles 3, and examples thereof include methyl methacrylate, isobutyl methacrylate, n-methyl acrylate, acrylic resin, Polyester-based and vinyl-based resins may be used.
本発明の方法では、有機物ポリマー粉末粒子４とニッ
ケル粒子３の混合比を変えることにより、再現性よく気
孔率の大きさを調製することができ、容易に気孔率の大
きさを揃えることができる。In the method of the present invention, the porosity can be adjusted with good reproducibility by changing the mixing ratio of the organic polymer powder particles 4 and the nickel particles 3, and the porosity can be easily equalized. .
なお、ニッケル粒子３と有機物ポリマー粉末粒子４を
混合する際よく混ぜ合わせておかないと、部分的に気孔
率の小さいものなどができるので、注意を要する。It should be noted that if the nickel particles 3 and the organic polymer powder particles 4 are not sufficiently mixed when they are mixed well, particles having a small porosity can partially be formed, and therefore care must be taken.
以上説明したように、本発明によると、焼結体の気孔
率を従来より大きくできるとともに、再現性よく気孔率
の大きさを調整することができ、カソードの長寿命化に
寄与する効果が大である。As described above, according to the present invention, the porosity of the sintered body can be made larger than before, and the size of the porosity can be adjusted with good reproducibility. It is.
第１図は本発明の一実施例を示す説明図、第２図は本発
明の方法によると気孔率が大きくなる状況を示す説明
図、第３図は従来のマッシュ型カソードの製造方法の一
例を示す説明図である。 １……金型、２……ベース金属、３……ニッケル粒子、
４……有機物ポリマー粉末粒子、５……ニッケル粒子３
と有機物ポリマー粉末粒子４の混合粉末、６……熱電子
放射物質、７……ヒータ、 なお図中同一符号は同一または相当するものを示す。FIG. 1 is an explanatory view showing one embodiment of the present invention, FIG. 2 is an explanatory view showing a situation where porosity increases according to the method of the present invention, and FIG. 3 is an example of a conventional method for manufacturing a mash type cathode. FIG. 1 ... mold, 2 ... base metal, 3 ... nickel particles,
4 ... organic polymer powder particles, 5 ... nickel particles 3
, A mixed powder of organic polymer powder particles 4, 6... Thermionic emission material, 7... A heater.
Claims (1)
結体の気孔内に熱電子放射物質を塗り込んだマッシュ型
カソードの製造方法において、 ベース金属上のニッケル粒子の焼結体を、粒径が５〜10
0μｍのニッケル粒子に該ニッケル粒子の焼結温度より
低い温度で分解気化する粒径が上記ニッケル粒子と同程
度の有機物ポリマー粉末粒子を所定の割合で混合した粉
末をベース金属上に堆積し、水素雰囲気中又は真空中で
加熱、上記ニッケル粒子を燃焼させて形成することを特
徴とするマッシュ型カソードの製造方法。1. A method for manufacturing a mash-type cathode in which thermionic emission material is applied to pores of a sintered body of nickel particles formed on a base metal, wherein the sintered body of nickel particles on the base metal is granulated. Diameter 5-10
A powder in which organic polymer powder particles having a particle size that decomposes and evaporates at a temperature lower than the sintering temperature of the nickel particles at a temperature lower than the sintering temperature of the nickel particles at a predetermined ratio is deposited on a base metal, and hydrogen is deposited on the base metal. A method for producing a mash-type cathode, wherein the mash-type cathode is formed by heating in an atmosphere or in a vacuum and burning the nickel particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2329714A JP3020270B2 (en) | 1990-11-30 | 1990-11-30 | Manufacturing method of mash type cathode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2329714A JP3020270B2 (en) | 1990-11-30 | 1990-11-30 | Manufacturing method of mash type cathode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04206350A JPH04206350A (en) | 1992-07-28 |
| JP3020270B2 true JP3020270B2 (en) | 2000-03-15 |
Family
ID=18224452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2329714A Expired - Fee Related JP3020270B2 (en) | 1990-11-30 | 1990-11-30 | Manufacturing method of mash type cathode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3020270B2 (en) |
-
1990
- 1990-11-30 JP JP2329714A patent/JP3020270B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04206350A (en) | 1992-07-28 |
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