JPS6352765B2 - - Google Patents
Info
- Publication number
- JPS6352765B2 JPS6352765B2 JP55099512A JP9951280A JPS6352765B2 JP S6352765 B2 JPS6352765 B2 JP S6352765B2 JP 55099512 A JP55099512 A JP 55099512A JP 9951280 A JP9951280 A JP 9951280A JP S6352765 B2 JPS6352765 B2 JP S6352765B2
- Authority
- JP
- Japan
- Prior art keywords
- anode
- lead wire
- metal powder
- aluminum
- anode lead
- 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
Links
- 229910052751 metal Inorganic materials 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 24
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 17
- 239000000843 powder Substances 0.000 claims description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 239000003990 capacitor Substances 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 10
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 8
- 229910052715 tantalum Inorganic materials 0.000 claims description 8
- 229910052758 niobium Inorganic materials 0.000 claims description 7
- 239000010955 niobium Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims 1
- 238000005245 sintering Methods 0.000 description 11
- 238000000465 moulding Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 239000010405 anode material Substances 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- WTKKCYNZRWIVKL-UHFFFAOYSA-N tantalum Chemical compound [Ta+5] WTKKCYNZRWIVKL-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Powder Metallurgy (AREA)
Description
【発明の詳細な説明】
本発明はタンタルまたはニオブなどの希少金属
を陽極物質にする固体電解コンデンサの陽極の製
造法に関するものである。タンタルまたはニオブ
を陽極物質とする固体電解コンデンサの陽極には
これらの金属粉末を成形して焼結した多孔質焼結
体が用いられ、そのリード線は金属粉末を成形焼
結する際に、これと一体に焼結接続される。とこ
ろで、タンタルやニオブは希少金属であるため、
金属粉末の微粉化によつて単位重量あたりの表面
積を拡大して静電容量を増大させる方法や陽極リ
ード線に使用するタンタル線又はニオブ線を細線
化することによつてその節約が行なわれている
が、一方ではタンタル線やニオブ線に代つて安価
なアルミニユーム線を陽極リード線として使用す
ることが考えられる。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing an anode for a solid electrolytic capacitor using a rare metal such as tantalum or niobium as the anode material. A porous sintered body made by molding and sintering these metal powders is used for the anode of a solid electrolytic capacitor that uses tantalum or niobium as the anode material. It is sintered and connected as one piece. By the way, since tantalum and niobium are rare metals,
Savings are achieved by increasing the surface area per unit weight by pulverizing the metal powder and increasing the capacitance, and by making the tantalum or niobium wire used for the anode lead wire thinner. However, it is conceivable to use an inexpensive aluminum wire as the anode lead wire instead of tantalum wire or niobium wire.
しかし、アルミニユームの融点はタンタル粉末
やニオブ粉末の焼結温度よりはるかに低いので、
アルミニユームの陽極リード線を焼結によつて接
続することはできない。したがつてアルミニユー
ムを陽極リード線とする場合は陽極金属粉末を焼
結しないでそのまま化成を行なう方法、すなわ
ち、非焼結法が行なわれる。この方法は陽極金属
粉末と陽極リード線との接触を良好にするため
と、コンデンサ製造工程中の機械的衝撃に耐える
ために、焼結法の場合よりも成形密度を高くする
必要がある。その結果、この非焼結陽極は固体電
解コンデンサを構成したときにそのtanδの値が大
きくなる。これは成形密度の増大により陰極材料
である二酸化マンガンの充填量が不足してコンデ
ンサの直列抵抗が増大するからである。 However, the melting point of aluminum is much lower than the sintering temperature of tantalum powder or niobium powder, so
Aluminum anode leads cannot be connected by sintering. Therefore, when aluminum is used as the anode lead wire, a method is used in which the anode metal powder is chemically converted as it is without sintering, that is, a non-sintering method is used. This method requires higher compaction density than the sintering method in order to ensure good contact between the anode metal powder and the anode lead wire and to withstand mechanical shock during the capacitor manufacturing process. As a result, this non-sintered anode has a large tan δ value when forming a solid electrolytic capacitor. This is because the increased molding density causes an insufficient filling amount of manganese dioxide, which is a cathode material, and increases the series resistance of the capacitor.
アルミニユームを陽極リード線として使用する
方法に、多孔質焼結体に直接、溶接する方法もあ
るが、この方法は溶接時の加熱によつて陽極金属
が酸化汚染されてコンデンサの漏れ電流特性が劣
化する。酸化を防止するために、真空中又は不活
性ガス中で溶接することは設備および作業が複雑
になつて生産性が低下する。 Another method of using aluminum as an anode lead wire is to weld it directly to a porous sintered body, but this method oxidizes and contaminates the anode metal due to heating during welding, which deteriorates the capacitor's leakage current characteristics. do. Welding in a vacuum or in an inert gas to prevent oxidation complicates equipment and operations and reduces productivity.
本発明は前記非焼結法および溶接法のもつ欠点
を排除したこれに代る新しいアルミニユーム陽極
リード線の接続法により、タンタルやニオブ等の
希少金属の陽極多孔質焼結体にアルミニユーム陽
極リード線を接続した固体電解コンデンサの陽極
の製造法を提供することを目的とするものであ
る。以下その実施例を図面について説明する。第
１図は本発明の製造法により得られる陽極リード
端子を備えた固体電解コンデンサの陽極を示して
いる。１はタンタルやニオブ等の希少金属粉末を
成形焼結した陽極多孔質焼結体、２はその中心部
に設けたリード線の埋設孔、３はアルミニユーム
陽極リード線で、該リード線３は前記埋設孔２の
内部に圧入されたタンタル、ニオブ等の希少金属
粉末、又はアルミニユーム粉末、あるいはこれら
の混合物よりなる金属粉末４によつて多孔質焼結
体１と一体的に結合されている。以上のように本
発明においては陽極金属粉末の多孔質焼結体１に
陽極リード線３が接続されるので、前記非焼結法
による従来例のようにtanδを増大させることな
く、また、溶接法による従来例のように加熱によ
る陽極金属の酸化汚染を避けることができる。 The present invention utilizes a new aluminum anode lead wire connection method that eliminates the drawbacks of the non-sintering method and the welding method, and provides an aluminum anode lead wire to a porous sintered anode of rare metals such as tantalum and niobium. The object of the present invention is to provide a method for manufacturing an anode for a solid electrolytic capacitor connected to a solid electrolytic capacitor. Examples thereof will be described below with reference to the drawings. FIG. 1 shows an anode of a solid electrolytic capacitor equipped with an anode lead terminal obtained by the manufacturing method of the present invention. 1 is an anode porous sintered body formed by molding and sintering rare metal powder such as tantalum or niobium; 2 is a hole for embedding a lead wire in the center; 3 is an aluminum anode lead wire; It is integrally bonded to the porous sintered body 1 by a metal powder 4 made of rare metal powder such as tantalum or niobium, aluminum powder, or a mixture thereof, which is press-fitted into the buried hole 2 . As described above, in the present invention, since the anode lead wire 3 is connected to the porous sintered body 1 of the anode metal powder, there is no need to increase tan δ unlike the conventional example using the non-sintering method, and it is possible to weld It is possible to avoid oxidation contamination of the anode metal due to heating as in the conventional method.
次に本発明の陽極製造法を第２図について説明
する。多孔質焼結体１に設ける埋設孔２は金属粉
末の焼結前の成形時に金型によつて所定の形状に
あらかじめ形成される。埋設孔２は金属粉末４の
圧入を容易にするために入口を拡大したラツパ型
のものとし、金属粉末４を充填する際には振動を
与える。陽極リード線３を挿入し、金属粉末４を
埋設孔２に充填した多孔質焼結体１はウレタンゴ
ムやシリコンゴム等に弾性物よりなる弾性容器５
に収容される。６は弾性容器５と同様の弾性材料
よりなる弾性蓋である。弾性容器５と弾性蓋６と
によつて包被された多孔質焼結体１はダイス７と
上下のパンチ８，９とよりなる金型内において等
方的に加圧されて埋設孔２内の金属粉末４を圧縮
し、陽極リード線３と多孔質焼結体１とを電気的
および機械的に一体に結合する。加圧は多孔性焼
結体１を破損しない程度の圧力で行なわれ、1000
Kg／cm2以上の圧力が使用可能である。弾性容器５
および弾性蓋６は加圧の際に多孔質焼結体１が損
傷するのを防止する。 Next, the anode manufacturing method of the present invention will be explained with reference to FIG. The embedded holes 2 provided in the porous sintered body 1 are preformed into a predetermined shape using a mold during molding of the metal powder before sintering. The buried hole 2 is of a trumpet type with an enlarged entrance to facilitate press-fitting of the metal powder 4, and vibration is applied when filling the metal powder 4. The porous sintered body 1 into which the anode lead wire 3 is inserted and the buried hole 2 filled with metal powder 4 is an elastic container 5 made of an elastic material such as urethane rubber or silicone rubber.
be accommodated in. Reference numeral 6 denotes an elastic lid made of the same elastic material as the elastic container 5. The porous sintered body 1 covered by the elastic container 5 and the elastic lid 6 is isotropically pressurized in the mold consisting of the die 7 and the upper and lower punches 8 and 9, and is pressed inside the burial hole 2. The metal powder 4 is compressed, and the anode lead wire 3 and the porous sintered body 1 are electrically and mechanically bonded together. Pressure is applied at a pressure that does not damage the porous sintered body 1.
Pressures greater than Kg/ cm2 can be used. Elastic container 5
And the elastic lid 6 prevents the porous sintered body 1 from being damaged during pressurization.
以上述べたように、本発明の固体電解コンデン
サの製造法は多孔質焼結体を弾性容器に収納して
金型内に圧縮するきわめて簡単な手段によつて実
施することができるので生産性が高く量産に適し
ている。 As described above, the method for manufacturing a solid electrolytic capacitor of the present invention can be carried out by an extremely simple method of storing a porous sintered body in an elastic container and compressing it in a mold, thereby increasing productivity. It is expensive and suitable for mass production.
さらに詳述すると本体部を予め焼結しているた
めに焼結工程での不純物の揮発で得られる金属純
度の向上によるコンデンサ特性の向上、本体の機
械的強度の向上によるコンデンサ製造のための処
理工程での特性劣化の低減など、本体部が圧縮成
形されただけの未焼結電極では得られない特性が
得られる。 More specifically, since the main body is pre-sintered, impurities are volatilized during the sintering process, resulting in improved metal purity, which improves the capacitor properties, and improves the mechanical strength of the main body, which is a process used to manufacture capacitors. It provides properties that cannot be obtained with an unsintered electrode whose main body is simply compression molded, such as reduced property deterioration during the process.
第１図：本発明の製造法により得られる陽極の
縦断面図、第２図：本発明の製造法の説明図
〔記号〕、１……多孔質焼結体、２……埋設孔、
３……陽極リード線、４……金属粉末、５……弾
性容器、６……弾性蓋、７……ダイス、８……下
パンチ、９……上パンチ。
Figure 1: Longitudinal cross-sectional view of an anode obtained by the manufacturing method of the present invention, Figure 2: Explanatory diagram of the manufacturing method of the present invention [Symbols], 1... Porous sintered body, 2... Buried hole,
3...Anode lead wire, 4...Metal powder, 5...Elastic container, 6...Elastic lid, 7...Dice, 8...Lower punch, 9...Upper punch.
Claims (1)
多孔質焼結体に陽極リード線の埋設孔を設け、該
埋設孔に前記希少金属粉末又はアルミニユーム若
しくはこれらの混合物よりなる金属粉末と共にア
ルミニユーム陽極リード線を挿入し、これらを弾
性容器に収納して金型により外部から等方的に加
圧して前記金属粉末を圧縮することによつて前記
アルミニユーム陽極リード線を前記埋設孔に一体
的に埋設固定することを特徴とする固体電解コン
デンサ陽極の製造法。1. An anode porous sintered body made of a rare metal such as tantalum or niobium is provided with a hole for embedding the anode lead wire, and an aluminum anode lead wire is inserted into the hole together with the rare metal powder or metal powder made of aluminum or a mixture thereof. The aluminum anode lead wire is integrally buried and fixed in the buried hole by inserting the aluminum anode lead wire into the hole, storing them in an elastic container, and isotropically applying pressure from the outside with a mold to compress the metal powder. A method for manufacturing a solid electrolytic capacitor anode characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9951280A JPS5724530A (en) | 1980-07-21 | 1980-07-21 | Anode for solid electrolytic condenser and method of producing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9951280A JPS5724530A (en) | 1980-07-21 | 1980-07-21 | Anode for solid electrolytic condenser and method of producing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5724530A JPS5724530A (en) | 1982-02-09 |
| JPS6352765B2 true JPS6352765B2 (en) | 1988-10-20 |
Family
ID=14249300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9951280A Granted JPS5724530A (en) | 1980-07-21 | 1980-07-21 | Anode for solid electrolytic condenser and method of producing same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5724530A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7257636B2 (en) * | 2018-10-12 | 2023-04-14 | パナソニックＩｐマネジメント株式会社 | Solid electrolytic capacitor and manufacturing method thereof |
-
1980
- 1980-07-21 JP JP9951280A patent/JPS5724530A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5724530A (en) | 1982-02-09 |
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