JPH11181505A - Production of anode body for solid electrolytic capacitor - Google Patents
Production of anode body for solid electrolytic capacitorInfo
- Publication number
- JPH11181505A JPH11181505A JP24568298A JP24568298A JPH11181505A JP H11181505 A JPH11181505 A JP H11181505A JP 24568298 A JP24568298 A JP 24568298A JP 24568298 A JP24568298 A JP 24568298A JP H11181505 A JPH11181505 A JP H11181505A
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic capacitor
- anode body
- solid electrolytic
- anode
- powder
- 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.)
- Granted
Links
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、固体電解コンデン
サ用陽極体の製造方法に関し、特に弁作用金属粉末を使
用した陽極体の製造方法に関する。The present invention relates to a method for manufacturing an anode body for a solid electrolytic capacitor, and more particularly to a method for manufacturing an anode body using a valve metal powder.
【０００２】[0002]
【従来の技術】従来の固体電解コンデンサに用いられる
陽極体は図３に示すように、例えばタンタル、ニオブ、
チタン等の弁作用金属粉末２と液状バインダ３とを混合
することにより、弁作用金属２の造粒を行い、これを圧
縮成型により成形し、さらにこの成形体に陽極リード５
を植立したものを、高温・高真空燒結することにより得
ている。図４の１ｄ’は燒結後の陽極体である。2. Description of the Related Art As shown in FIG. 3, an anode body used in a conventional solid electrolytic capacitor is, for example, tantalum, niobium, or the like.
By mixing the valve metal powder 2 such as titanium and the liquid binder 3, the valve metal 2 is granulated and formed by compression molding.
Is obtained by sintering at high temperature and high vacuum. 1d ′ in FIG. 4 is the anode body after sintering.
【０００３】この従来の固体電解コンデンサ用陽極体の
製造方法では、弁作用金属粉末の流動性・成形性を高め
ることを目的としているため、バインダは液状である。
また特開平４−１３６１０２号公報には、液状バインダ
混合後の造粒粉の流れ性を良好にするために、粒度とし
て２０〜４００μｍの範囲に整粒して使用する技術が開
示されている。また、特開平５−６５５０２号公報に
は、流動層式造粒機を用いてタンタル粉末を造粒する方
法において、水あるいは燐酸のような無機バインダをス
プレーして造粒を行い、次いでＤＶＡ等の有機バインダ
ーをスプレーして造粒する方法が示されている。この方
法では無機バインダーの凝集性と有機バインダーの粘着
性の利用を期待している。In this conventional method for manufacturing an anode body for a solid electrolytic capacitor, the binder is in a liquid state because the purpose is to enhance the fluidity and moldability of the valve metal powder.
Japanese Patent Application Laid-Open No. 4-136102 discloses a technique in which granules are sized and used in a range of 20 to 400 μm in order to improve the flowability of granulated powder after mixing a liquid binder. JP-A-5-65502 discloses a method of granulating tantalum powder using a fluidized bed granulator, in which an inorganic binder such as water or phosphoric acid is sprayed to perform granulation, followed by DVA or the like. And granulating by spraying an organic binder. This method is expected to utilize the cohesiveness of the inorganic binder and the tackiness of the organic binder.
【０００４】[0004]
【発明が解決しようとする課題】上記した従来法におけ
る第１の問題点は、従来の固体電解コンデンサ用陽極体
の製造において、弁作用金属粉末を造粒する際に使用す
る液状バインダは、造粒粉の表面に極めて薄く膜状に付
着させているため、造粒粉の流れ性を改善することはで
きるが、固体電解コンデンサのｔａｎδ，ＥＳＲ特性を
改善することはできない点である。The first problem in the above-mentioned conventional method is that the liquid binder used for granulating the valve metal powder in the conventional production of an anode body for a solid electrolytic capacitor is difficult to produce. Since it is extremely thinly attached to the surface of the granular powder in the form of a film, the flowability of the granulated powder can be improved, but the tan δ and ESR characteristics of the solid electrolytic capacitor cannot be improved.
【０００５】その理由は、造粒粉の表面に薄く付着した
程度のバインダでは、燒結後の固体電解コンデンサ用陽
極体造粒粉間の空隙を大きくすることができず、固体電
解質層の含浸を促進することができないからである。[0005] The reason for this is that, with a binder that is thinly adhered to the surface of the granulated powder, it is not possible to increase the gap between the sintering anode granulated powder for a solid electrolytic capacitor and impregnate the solid electrolyte layer. Because it cannot be promoted.
【０００６】第２の問題点は、前項にて記載した特開平
４−１３６１０２号公報の場合にも該当するが、従来の
固体電解コンデンサ用陽極体形成に用いる弁作用金属粉
末の造粒粉粒度を２０〜４００μｍに揃えることによ
り、造粒粉の流れ性は良くなるが、固体電解コンデンサ
のｔａｎδ，ＥＳＲ特性は改善困難なことである。[0006] The second problem also corresponds to the case of Japanese Patent Application Laid-Open No. 4-136102 described in the preceding paragraph, but the granulated powder particle size of the valve action metal powder used for forming the conventional anode body for a solid electrolytic capacitor is known. Is adjusted to 20 to 400 μm, the flowability of the granulated powder is improved, but it is difficult to improve the tan δ and ESR characteristics of the solid electrolytic capacitor.
【０００７】その理由は、造粒粉の整粒により微小な粒
子が取り除かれ、造粒粉間の空隙は整粒前よりは一旦は
大きくなるものの、固体電解コンデンサ用陽極体成形時
の圧縮加工によりその空隙は非常に小さくなり、結果的
に空隙は整粒を実施していない造粒粉を使用した場合と
殆ど変わらなくなってしまうからである。[0007] The reason is that the fine particles are removed by sizing the granulated powder, and the gap between the granulated powders is once larger than before the sizing, but the compression processing at the time of forming the anode body for the solid electrolytic capacitor is performed. Thereby, the voids become very small, and as a result, the voids become almost the same as when using granulated powder that has not been subjected to sizing.
【０００８】第３の問題点は、整粒しない造粒粉（粒度
分布１〜５００μｍ）に単に固形有機物を添加してもｔ
ａｎδ，ＥＳＲ特性は改善困難なことである。The third problem is that simply adding a solid organic substance to granulated powder (particle size distribution: 1 to 500 μm) which is not sized is not effective.
The an δ and ESR characteristics are difficult to improve.
【０００９】その理由は、造粒粉中に添加された固形有
機物は固体電解コンデンサ用陽極体の焼成時に揮発し空
間を形成するものの、その空間の近傍の隙間は微小な造
粒粉によって埋められ、固形有機物により形成された多
数の空間は結局各々孤立した状態となり固体電解質層の
含浸は促進されないからである。The reason is that the solid organic matter added to the granulated powder volatilizes when the anode body for a solid electrolytic capacitor is fired and forms a space, but the gap near the space is filled with fine granulated powder. This is because a large number of spaces formed by the solid organic matter end up in an isolated state, and the impregnation of the solid electrolyte layer is not promoted.
【００１０】上記の事実から理解されるように、本発明
の目的は、ｔａｎδ特性、ＥＳＲ特性が改善できる固体
電解コンデンサ用陽極体の製造方法を提供することにあ
る。As understood from the above facts, an object of the present invention is to provide a method for manufacturing an anode body for a solid electrolytic capacitor which can improve tan δ characteristics and ESR characteristics.
【００１１】[0011]
【課題を解決するための手段】本発明の固体電解コンデ
ンサ用陽極体の製造方法は、弁作用金属を圧縮・成形
し、陽極リードを植立して成型体を形成する工程と、前
記成型体を高温・高真空中で燒結する工程とを有する固
体電解コンデンサ用陽極体の製造方法において、前記成
型体を、弁作用金属の凝集粉または造粒粉と固形有機物
とを組合せて形成することを特徴とするものである。According to the present invention, there is provided a method for manufacturing an anode body for a solid electrolytic capacitor, comprising the steps of: compressing and molding a valve metal and implanting an anode lead to form a molded body; And a step of sintering the solid body in a high temperature and high vacuum, wherein the molded body is formed by combining an agglomerated powder or granulated powder of a valve action metal with a solid organic matter. It is a feature.
【００１２】上記した本発明において、使用する凝集粉
または造粒粉の大きさが５０〜２００μｍであり、ま
た、使用する固形有機物の平均粒径が２０μｍ以下であ
り、かつその添加量が陽極体重量比で１〜１０％の範囲
であることが好ましい。In the above-mentioned present invention, the size of the agglomerated powder or granulated powder to be used is 50 to 200 μm, the average particle size of the solid organic substance to be used is 20 μm or less, and the amount of the added The weight ratio is preferably in the range of 1 to 10%.
【００１３】上記した本発明において使用する固形有機
物は、成形体を焼結する際の焼結条件において完全に熱
分解しうるものであることが好ましく、固形有機物がポ
リビニアルコール系またはアクリル系固形バインダまた
は樟脳であることが好ましい。The solid organic substance used in the present invention is preferably one that can be completely thermally decomposed under the sintering conditions for sintering the molded body. The solid organic substance is preferably a polyvinyl alcohol-based or acryl-based solid. Preferably it is a binder or camphor.
【００１４】本発明の一つの実施の態様によれば、１〜
３００μｍの粒度分布を有する弁作用金属粉末と液状バ
インダーとを混合して造粒したのち、分級して５０〜２
００μｍの造粒粉を得、次いで平均粒径２０μｍ以下の
固形有機物を陽極体重量比として１〜１０重量％の範囲
で混合し、陽極リードを植立して成型体を形成する工程
と、前記成型体を高温・高真空下で燒結する工程とを有
する固体電解コンデンサ用陽極体の製造方法が提供され
る。According to one embodiment of the present invention,
After mixing and granulating a valve metal powder having a particle size distribution of 300 μm and a liquid binder, the mixture is classified to 50-2.
Obtaining a granulated powder having a particle size of 00 μm, then mixing a solid organic substance having an average particle diameter of 20 μm or less in a range of 1 to 10% by weight as an anode body weight ratio, and implanting an anode lead to form a molded body; A step of sintering the molded body under a high temperature and a high vacuum.
【００１５】[0015]
【発明の実施の形態】一般に、分級した造粒粉を用いる
ことにより造粒粉粒子間の空隙が大きくできるようにな
る。しかし、この造粒粉をそのまま使用すると陽極体の
圧縮成型時に空隙が狭くなり効果が半減してしまう。そ
のため、本発明においては上記のように、さらに固形有
機物を混合することを特徴とする。これにより造粒粉の
圧縮成形時に造粒粉間に固形有機物が存在することにな
り、この成形体を燒結することにより固形有機物は焼き
飛ばされ、成形体中の空間が確保され、さらにそれらの
空間同士も分級した造粒粉の間に生じる空隙により連結
されるため、その後の固体電解質層の陽極体への含浸が
容易となる。DESCRIPTION OF THE PREFERRED EMBODIMENTS In general, the use of classified granulated powder makes it possible to increase the gap between granulated powder particles. However, if this granulated powder is used as it is, the voids become narrower during compression molding of the anode body, and the effect is reduced by half. Therefore, the present invention is characterized by further mixing a solid organic substance as described above. As a result, solid organic matter is present between the granulated powder during compression molding of the granulated powder, and the solid organic matter is burned off by sintering the molded body, and the space in the molded body is secured, and furthermore, Since the spaces are also connected to each other by the voids generated between the classified granulated powders, the subsequent impregnation of the solid electrolyte layer into the anode body becomes easy.
【００１６】本発明において、弁作用金属を圧縮成形
し、陽極リードを植立して成形体を形成する工程と、成
形体を高温・高真空中で燒結する工程とにより、固体電
解コンデンサ用陽極体を製造する際の工程自体について
は、それぞれ、通常実施される製造条件がそのまま適用
できる。In the present invention, a positive electrode for a solid electrolytic capacitor is formed by a step of compression molding a valve metal and implanting an anode lead to form a molded body, and a step of sintering the molded body in a high temperature and high vacuum. Regarding the steps themselves for producing the body, the production conditions usually carried out can be applied as they are.
【００１７】しかしながら、成形体を形成する際には、
固形有機物を弁作用金属の凝集粉または造粒粉中に存在
させることが必要であり、その際凝集粉または造粒粉の
大きさは５０〜２００μｍであることが好ましい。この
場合の造粒粉の大きさが５０μｍに満たない場合には造
粒粉間の隙間が確保し難く、２００μｍを越える場合は
造粒粉が崩れ易くなるため好ましくない。However, when forming a molded body,
It is necessary that the solid organic substance be present in the agglomerated powder or granulated powder of the valve action metal. In this case, the size of the agglomerated powder or granulated powder is preferably 50 to 200 μm. In this case, if the size of the granulated powder is less than 50 μm, it is difficult to secure a gap between the granulated powders, and if it exceeds 200 μm, the granulated powder is liable to collapse, which is not preferable.
【００１８】固形有機物の平均粒径は２０μｍ以下、好
ましくは１０μｍ程度であり、粒度分布は通常１〜３０
μｍの範囲である。平均粒径が２０μｍを越える場合
は、粒径の大きい固形有機物の比率が高くなり、固形有
機物周辺の微細な空隙がつぶれてしまうために好ましく
ない。また、その添加量は、陽極体重量比で１〜１０％
であることが好ましく、１％に満たない場合は添加の効
果が非常に小さく、１０％を越える場合は炭素等の残留
物質が多くなり不適である。The average particle size of the solid organic matter is 20 μm or less, preferably about 10 μm, and the particle size distribution is usually 1 to 30 μm.
It is in the range of μm. If the average particle diameter exceeds 20 μm, the ratio of solid organic substances having a large particle diameter increases, and fine voids around the solid organic substances are undesirably collapsed. The amount of addition is 1 to 10% by weight of the anode body.
When the content is less than 1%, the effect of addition is extremely small, and when it exceeds 10%, residual substances such as carbon are increased, which is not suitable.
【００１９】本発明で特に用いられる固形有機物は、成
形体を高温・真空中で燒結する際の燒結条件において完
全に分解し得るものであれば使用可能である。このよう
な条件を満たす一般的固形有機物としては多数挙げられ
るが、なかでもＰＶＡ系またはアクリル系固形バイン
ダ、あるいは樟脳の使用が好ましい。As the solid organic substance particularly used in the present invention, any solid organic substance can be used as long as it can be completely decomposed under the sintering conditions when sintering the molded body in a high temperature and vacuum. There are many general solid organic substances satisfying such conditions, and among them, use of a PVA-based or acrylic solid binder or camphor is preferred.
【００２０】本発明の好ましい態様について図面を用い
て具体的に説明する。図１は本発明の固体電解コンデン
サ用陽極体の製造方法により形成された成形体の断面図
である。Preferred embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is a sectional view of a molded body formed by the method for producing an anode body for a solid electrolytic capacitor of the present invention.
【００２１】まず１〜３００μｍ程度の粒度分布を有す
る弁作用金属粉末２と液状バインダ３を混合し、造粒粉
７（不図示）を得る。次にこの造粒粉７を分級し、通常
粒径５０〜２００μｍの範囲の分級造粒粉（不図示）の
みを取り出す。これに平均粒径２０μｍ以下の固形有機
物４を陽極体重量比で１〜１０ｗｔ％となるように加え
混合粉を得る。この混合粉に陽極リード５を埋設して圧
縮成形して成形体１ａ（図１）を作成した後、これを高
温・高真空中で燒結することにより固体電解コンデンサ
用陽極体１ｂ（図２）を得ることができる。First, a valve metal powder 2 having a particle size distribution of about 1 to 300 μm and a liquid binder 3 are mixed to obtain a granulated powder 7 (not shown). Next, the granulated powder 7 is classified, and only a classified granulated powder (not shown) having a particle size of usually 50 to 200 μm is taken out. Solid organic matter 4 having an average particle diameter of 20 μm or less is added to the mixture so that the weight ratio of the anode body is 1 to 10% by weight to obtain a mixed powder. An anode lead 5 is embedded in this mixed powder and compression-molded to form a molded body 1a (FIG. 1), which is then sintered in a high temperature and high vacuum to form an anode body 1b for a solid electrolytic capacitor (FIG. 2). Can be obtained.
【００２２】この陽極体１ｂを公知の固体電解コンデン
サの製造方法にしたがって、酸化皮膜層、固体電解層、
グラファイト層、銀ペースト層等の陰極層を順次形成す
る。従来技術により得られる陽極体１ｄと比較して、本
発明の固体電解コンデンサ陽極体の表面および内部は、
空隙が増加しているために特に固体電解質層の陽極体中
への含浸が促進され、結果として固体電解コンデンサの
ｔａｎδ、ＥＳＲが従来品に対比して５〜４０％程度低
下する。According to a known method for manufacturing a solid electrolytic capacitor, the anode body 1b is formed with an oxide film layer, a solid electrolytic layer,
A cathode layer such as a graphite layer and a silver paste layer is sequentially formed. Compared with the anode body 1d obtained by the prior art, the surface and inside of the solid electrolytic capacitor anode body of the present invention are:
Since the voids are increased, impregnation of the solid electrolyte layer into the anode body is particularly promoted, and as a result, tan δ and ESR of the solid electrolytic capacitor are reduced by about 5 to 40% as compared with the conventional product.
【００２３】[0023]
【実施例】次に、本発明の実施例について図面を参照し
て詳細に説明する。Next, embodiments of the present invention will be described in detail with reference to the drawings.
【００２４】図１は本発明の固体電解質コンデンサ用陽
極体の製造方法により形成された成形体の断面図であ
る。１ａは未燒結成形体であり、１ａ’はその部分拡大
図である。FIG. 1 is a sectional view of a molded article formed by the method for producing an anode for a solid electrolyte capacitor according to the present invention. 1a is an unsintered compact, and 1a 'is a partially enlarged view thereof.
【００２５】成形体用の分級造粒粉８は、次の工程によ
り製造したものである。すなわち、第１工程として１〜
３００μｍ程度の粒度分布を有するＴａ，Ａｌ等の弁作
用金属粉末２とＰＶＡ，ＰＶＢ等をメチルセロソルブ等
の溶剤で溶解させた液状バインダ３を陽極体重量比で１
〜３ｗｔ％の範囲で添加して混合・造粒して１〜５００
μｍ程度の粒度分布を有する造粒粉７を製造し、第２工
程としてこの造粒粉７から分級により取り出した粒径５
０〜２００μｍの範囲の分級造粒粉８を得たものであ
る。図５は、造粒粉７と分級造粒粉８の粉末粒度分布と
相対粒子量との関係を示したものである。The classified granulated powder 8 for a compact is produced by the following steps. That is, 1 to 1
A valve metal powder 2 such as Ta or Al having a particle size distribution of about 300 μm and a liquid binder 3 in which PVA, PVB or the like is dissolved in a solvent such as methyl cellosolve are mixed at a weight ratio of 1 to the anode body.
Add in the range of ~ 3 wt%, mix and granulate to 1 ~ 500
A granulated powder 7 having a particle size distribution of about μm is produced, and as a second step, a particle size 5 extracted from the granulated powder 7 by classification is used.
This is to obtain classified granulated powder 8 in the range of 0 to 200 µm. FIG. 5 shows the relationship between the particle size distribution of the granulated powder 7 and the classified granulated powder 8 and the relative particle amount.
【００２６】この分級造粒粉８に平均粒径２０μｍ以下
のＰＶＡ、樟脳等の固形有機物を陽極体重量比にして１
〜１０ｗｔ％の範囲で、通常、Ｖ型混合器等により添加
・混合する。A solid organic substance such as PVA or camphor having an average particle diameter of 20 μm or less is added to the classified granulated powder 8 in an anode body weight ratio of 1%.
Usually, it is added and mixed in a range of 10 wt% to 10 wt% by a V-type mixer or the like.
【００２７】図２は図１の成形体より公知の方法により
焼成して得られる固体電解コンデンサ用陽極体を示した
ものである。１ｂは燒結成形体であり、１ｂ’はその部
分拡大図である。FIG. 2 shows an anode body for a solid electrolytic capacitor obtained by firing the molded body of FIG. 1 by a known method. 1b is a sintered compact, and 1b 'is a partially enlarged view thereof.
【００２８】図６は、図に示すＡ〜Ｄの４種の造粒粉の
粒径とＥＳＲとの関係を表すグラフである。なお、ＥＳ
Ｒの測定は、ＪＩＳ Ｃ５１０２−１９９４の７．８頃
および７、１１項記載に準拠して行った。この実験にお
ける使用造粒粉に対する固形バインダの添加量は５ｗｔ
％である。ただしＡには添加していない。グラフでは本
発明の好ましい範囲５０〜２００μｍを越える範囲であ
る２００μｍ以上の領域でもＥＳＲ低減効果が現れるこ
とを示している。しかしながら実際には、陽極体に使用
される粉末重量に大きなバラツキが生じるため、コンデ
ンサの容量バラツキの原因となり、採用には不適とな
る。FIG. 6 is a graph showing the relationship between the particle diameters of the four types of granulated powders A to D shown in the figure and ESR. Note that ES
The measurement of R was carried out according to JIS C5102-1994 at about 7.8 and paragraphs 7 and 11. The amount of the solid binder added to the granulated powder used in this experiment was 5 wt.
%. However, it was not added to A. The graph shows that the ESR reduction effect appears even in a region of 200 μm or more, which is a range exceeding the preferable range of 50 to 200 μm of the present invention. However, in practice, a large variation occurs in the weight of the powder used for the anode body, which causes a variation in the capacity of the capacitor, which is unsuitable for use.
【００２９】図７は、固形有機物として使用したアクリ
ル系固形バインダの添加量およびバインダ粒径とＥＳＲ
との関係を表すグラフである。この実験においては５０
〜２００μｍの大きさを有する造粒粉に固形バインダを
添加したものである。FIG. 7 shows the addition amount of the acrylic solid binder used as the solid organic substance, the binder particle size, and the ESR.
It is a graph showing the relationship with. In this experiment, 50
It is obtained by adding a solid binder to granulated powder having a size of about 200 µm.
【００３０】本発明における固形有機物の好ましい添加
量範囲は１〜１０ｗｔ％であるが、それ以上の添加を行
う場合は、陽極体の単位体積当たりの金属粉末分が減少
し、容量の低下を招き、ＥＳＲが上昇し、また残留炭素
量が増加するため洩れ電流も増大し、コンデンサ特性の
劣化を招いている。一方、固形バインダの粒径が増大す
るＥＳＲ低減効果が小さくなることもわかる。In the present invention, the preferred range of the amount of the solid organic substance is 1 to 10 wt%. However, when the amount is more than that, the amount of the metal powder per unit volume of the anode body is reduced, and the capacity is reduced. , ESR increases, and the amount of residual carbon increases, so the leakage current also increases, leading to deterioration of capacitor characteristics. On the other hand, it can also be seen that the ESR reduction effect of increasing the particle size of the solid binder is reduced.
【００３１】[0031]
【発明の効果】本発明の効果は、本発明の製造方法によ
り製造された固体電解コンデンサ用陽極体を使用した固
体電解コンデンサが、ｔａｎδおよびＥＳＲ特性におい
て５〜４０％程度低くすることができることである。図
６および７はその一例を示したものである。The effect of the present invention is that the solid electrolytic capacitor using the solid electrolytic capacitor anode body manufactured by the manufacturing method of the present invention can lower the tan δ and ESR characteristics by about 5 to 40%. is there. 6 and 7 show one example.
【００３２】この特性向上の理由は、本発明により製造
された固体電解コンデンサ用陽極体は、その形成材料と
して粒径５０〜２００μｍの弁作用金属造粒粉に平均粒
径２０μｍ以下の固形有機物を１〜１０ｗｔ％混合させ
た混合粉を用いているため、陽極体中の空間・空隙を確
保することができ、この空隙が陰極層形成時における固
体電解質層の陽極体への含浸を容易とし、さらにその含
浸厚みも大きくするからである。The reason for the improvement of the characteristics is that the anode body for a solid electrolytic capacitor manufactured according to the present invention is made of a valve action metal granulated powder having a particle diameter of 50 to 200 μm and a solid organic substance having an average particle diameter of 20 μm or less. Since the mixed powder mixed with 1 to 10 wt% is used, a space and a void in the anode body can be secured, and this gap facilitates the impregnation of the solid electrolyte layer into the anode body when the cathode layer is formed, This is because the impregnation thickness is further increased.
【図１】本発明の実施例の方法により製造された燒結前
の固体電解コンデンサ用陽極体（成形体）およびその断
面図である。FIG. 1 is a cross-sectional view of an anode body (formed body) for a solid electrolytic capacitor before sintering manufactured by a method according to an embodiment of the present invention and a molded body.
【図２】本発明の実施例の方法により製造された燒結後
の固体電解コンデンサ用陽極体およびその断面図であ
る。FIG. 2 is a sectional view of an anode body for a solid electrolytic capacitor after sintering manufactured by a method according to an embodiment of the present invention and a sectional view thereof.
【図３】従来の製造方法により製造された燒結前の固体
電解コンデンサ用陽極体（成形体）およびその断面図で
ある。FIG. 3 is a cross-sectional view of an anode body (formed body) for a solid electrolytic capacitor before sintering manufactured by a conventional manufacturing method and a sintered body.
【図４】従来の製造方法により製造された燒結後の固体
電解コンデンサ用陽極体およびその断面図である。FIG. 4 is a cross-sectional view of an anode body for a solid electrolytic capacitor after sintering manufactured by a conventional manufacturing method and the same.
【図５】通常の弁作用金属粉末および本発明の陽極体原
料として使用する造粒粉の粒度分布を示したグラフであ
る。FIG. 5 is a graph showing the particle size distribution of normal valve action metal powder and granulated powder used as a raw material for an anode body of the present invention.
【図６】固体電解質コンデンサ用陽極体に使用する造粒
粉の粒径とＥＳＲ特性の関係を示す例である。FIG. 6 is an example showing the relationship between the particle size of granulated powder used for an anode body for a solid electrolyte capacitor and ESR characteristics.
【図７】固体電解質コンデンサ用陽極体に使用する固形
バインダの添加量および粒径とＥＳＲ特性の関係を示す
例である。FIG. 7 is an example showing the relationship between the addition amount and particle size of a solid binder used for an anode body for a solid electrolyte capacitor and ESR characteristics.
１ａ 本発明の方法にて製造した成形体（未燒結） １ｂ 本発明の方法にて製造した陽極体（燒結後） １ｃ 従来の成形体（未燒結） １ｄ 従来の陽極体（燒結後） ２ 弁作用金属粉末 ３ 液状バインダ ４ 固形有機物 ５ 陽極リード ６ 空孔 ７ 造粒粉 ８ 本発明において使用する分級造粒粉 1a Molded body manufactured by the method of the present invention (unsintered) 1b Anode body manufactured by the method of the present invention (after sintering) 1c Conventional formed body (unsintered) 1d Conventional anode body (after sintering) 2 Valve Working metal powder 3 Liquid binder 4 Solid organic matter 5 Anode lead 6 Void 7 Granulated powder 8 Classified granulated powder used in the present invention
Claims (9)
を植立して成型体を形成する工程と、前記成型体を高温
・高真空中で燒結する工程とを有する固体電解コンデン
サ用陽極体の製造方法において、前記成型体を、弁作用
金属凝集粉または造粒粉と固形有機物とを組み合わせて
形成することを特徴とする固体電解コンデンサ用陽極体
の製造方法。1. An anode for a solid electrolytic capacitor, comprising: a step of compressing and molding a valve metal and implanting an anode lead to form a molded body; and a step of sintering the molded body in a high temperature and high vacuum. In a method for manufacturing a body, a method for manufacturing an anode body for a solid electrolytic capacitor, characterized in that the molded body is formed by combining a valved metal aggregated powder or granulated powder with a solid organic substance.
粉の大きさが５０〜２００μｍであることを特徴とする
請求項１に記載の固体電解コンデンサ用陽極体の製造方
法。2. The method for producing an anode body for a solid electrolytic capacitor according to claim 1, wherein the size of the agglomerated powder or granulated powder of the valve action metal used is 50 to 200 μm.
ｍ以下であり、かつその添加量が陽極体重量比で１〜１
０％であることを特徴とする請求項１に記載の固体電解
コンデンサ用陽極体の製造方法。3. The solid organic substance used has an average particle size of 20 μm.
m or less and the amount of addition is 1 to 1 in terms of the weight of the anode body.
The method for producing an anode body for a solid electrolytic capacitor according to claim 1, wherein the amount is 0%.
条件において完全に熱分解し得るものであることを特徴
とする請求項１に記載の固体電解コンデンサ用陽極体の
製造方法。4. The method for producing an anode body for a solid electrolytic capacitor according to claim 1, wherein the solid organic substance is capable of being completely thermally decomposed under sintering conditions when the molded body is sintered.
アクリル系および樟脳からなる群から選ばれたものであ
ることを特徴とする請求項１に記載の固体電解コンデン
サ用陽極体の製造方法。5. The method according to claim 1, wherein the solid organic substance is a polyvinyl alcohol type.
The method for producing an anode body for a solid electrolytic capacitor according to claim 1, wherein the anode body is selected from the group consisting of acrylic and camphor.
ルミニウムからなる群から選ばれたものであることを特
徴とする請求項１に記載の固体電解コンデンサ用陽極体
の製造方法。6. The method of claim 1, wherein the valve metal is selected from the group consisting of tantalum, niobium and aluminum.
する弁作用金属粉末と液状バインダーとを混合し造粒し
分級したものであることを特徴とする請求項２に記載の
固体電解コンデンサ用陽極体の製造方法。7. The solid electrolytic capacitor according to claim 2, wherein the granulated powder is a mixture of a valve metal powder having a particle size distribution of 1 to 300 μm and a liquid binder, granulated and classified. Of manufacturing anode body for use.
またはポリビニルブチラールを溶剤に溶解したものであ
ることを特徴とする請求項７に記載の固体電解コンデン
サ用陽極体の製造方法。8. The method for producing an anode body for a solid electrolytic capacitor according to claim 7, wherein the liquid binder is obtained by dissolving polyvinyl alcohol or polyvinyl butyral in a solvent.
用金属粉末と液状バインダーとを混合して造粒したの
ち、分級して５０〜２００μｍの造粒粉を得、次いで平
均粒径２０μｍ以下の固形有機物を陽極体重量比として
１〜１０重量％の範囲で混合し、陽極リードを植立して
成型体を形成する工程と、前記成型体を高温・高真空化
で燒結する工程とを有する固体電解コンデンサ用陽極体
の製造方法。9. After mixing and granulating a valve metal powder having a particle size distribution of 1 to 300 μm and a liquid binder, the mixture is classified to obtain a granulated powder of 50 to 200 μm, and then having an average particle size of 20 μm or less. The method comprises the steps of mixing a solid organic substance in a weight ratio of 1 to 10% by weight of an anode body, implanting an anode lead to form a molded body, and sintering the molded body at high temperature and high vacuum. A method for manufacturing an anode body for a solid electrolytic capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10245682A JP3077679B2 (en) | 1997-09-01 | 1998-08-31 | Method for manufacturing anode body for solid electrolytic capacitor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23612697 | 1997-09-01 | ||
| JP9-236126 | 1997-09-01 | ||
| JP10245682A JP3077679B2 (en) | 1997-09-01 | 1998-08-31 | Method for manufacturing anode body for solid electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11181505A true JPH11181505A (en) | 1999-07-06 |
| JP3077679B2 JP3077679B2 (en) | 2000-08-14 |
Family
ID=26532501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10245682A Expired - Lifetime JP3077679B2 (en) | 1997-09-01 | 1998-08-31 | Method for manufacturing anode body for solid electrolytic capacitor |
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| Country | Link |
|---|---|
| JP (1) | JP3077679B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7204866B2 (en) | 2000-06-01 | 2007-04-17 | Cabot Supermetals K.K. | Niobium or tantalum powder and method for production thereof, and solid electrolytic capacitor |
| JP2012054574A (en) * | 2001-03-16 | 2012-03-15 | Showa Denko Kk | Niobium for capacitor, and capacitor using niobium sintered body |
| JP2014084505A (en) * | 2012-10-24 | 2014-05-12 | Toho Titanium Co Ltd | Method for manufacturing a porous thin titanium film |
| CN110814348A (en) * | 2019-11-22 | 2020-02-21 | 湖南艾华集团股份有限公司 | Preparation method of sintered aluminum foil with high specific volume |
-
1998
- 1998-08-31 JP JP10245682A patent/JP3077679B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7204866B2 (en) | 2000-06-01 | 2007-04-17 | Cabot Supermetals K.K. | Niobium or tantalum powder and method for production thereof, and solid electrolytic capacitor |
| JP2012054574A (en) * | 2001-03-16 | 2012-03-15 | Showa Denko Kk | Niobium for capacitor, and capacitor using niobium sintered body |
| JP2014084505A (en) * | 2012-10-24 | 2014-05-12 | Toho Titanium Co Ltd | Method for manufacturing a porous thin titanium film |
| CN110814348A (en) * | 2019-11-22 | 2020-02-21 | 湖南艾华集团股份有限公司 | Preparation method of sintered aluminum foil with high specific volume |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3077679B2 (en) | 2000-08-14 |
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