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Electrode material for aluminum electrolytic capacitor and method for manufacturing the material

A technology of aluminum electrolytic capacitors and electrode materials, which is applied in the direction of electrolytic capacitors, capacitor electrodes, capacitors, etc., can solve the problems of insufficient porosity, gaps buried in gaps, difficulty in obtaining electrostatic capacity, etc., and achieve the effect of easy control and easy electrostatic capacity

Inactive Publication Date: 2012-11-28
TOYO ALUMINIUM KK
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0014] However, in the technique of Patent Document 3, since the control technique of the formed voids and the obtained porosity are insufficient, when forming an anodic oxide film with various voltages depending on the applied voltage, there are cases where the voids are buried or the interval between the voids is too wide. Difficulty in obtaining the required capacitance

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  • Electrode material for aluminum electrolytic capacitor and method for manufacturing the material
  • Electrode material for aluminum electrolytic capacitor and method for manufacturing the material

Examples

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preparation example Construction

[0051] 2. Preparation method of electrode material for aluminum electrolytic capacitor

[0052] The preparation method of the electrode material for aluminum electrolytic capacitor of the present invention is characterized in that, the method comprises:

[0053] (1) The first step of forming a film made of a paste composition containing powder of at least one of aluminum and aluminum alloys, and cellulose other than nitrocellulose resin, on a substrate. resin; and

[0054] (2) In the second process, the film is sintered at a temperature of 560° C. to 660° C.; and the etching process is not included.

[0055] The preparation method of the present invention having the above-mentioned characteristics has the following characteristics, in particular, a specific paste composition is used in the first step. By using a cellulose resin other than nitrocellulose as an essential component of the paste composition, it is possible to control aluminum or aluminum alloy powder particles...

Embodiment 1～9

[0100] Cellulose resins other than nitrocellulose were dissolved in a solvent (toluene-IPA), mixed with aluminum powder (JIS A1080, manufactured by Toyo Aluminum Co., Ltd.) with an average particle diameter of 5.0 μm, and dispersed to obtain Coating solution with solid content shown in 1. This coating solution was applied to both sides of a 30 μm thick aluminum foil (JIS 1N30-H18) with a comma coater to almost the same thickness, and the film was then dried. The aluminum foil was sintered in an argon atmosphere at a temperature of 615° C. for 7 hours to obtain an electrode material. The thickness of the sintered electrode material is about 130 μm.

[0101] The electrostatic capacity and porosity of the prepared electrode materials are shown in Table 1.

[0102] Table 1

[0103]

[0104]

[0105] Existing Examples 1 and 2 and Examples 1 to 9 are electrode materials obtained by a preparation method that does not include etching treatment, but in Existing Examples 1 and ...

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Abstract

The invention provides an electrode material for an aluminum electrolytic capacitor, which has a high porosity and a high capacitance and does not require etching. Specifically, the electrode material for an aluminum electrolytic capacitor is characterized in that the material is composed of a sintered body of aluminum or that of at least one kind of aluminum alloy, and the porosity of the sintered body is 35-55%.

Description

technical field [0001] The invention relates to an electrode material for an aluminum electrolytic capacitor, in particular to an anode electrode material for a medium-high voltage aluminum electrolytic capacitor and a preparation method thereof. Background technique [0002] At present, there are mainly aluminum electrolytic capacitors, tantalum electrolytic capacitors and ceramic capacitors used as capacitors. [0003] Ceramic capacitors are made by using barium titanate as a dielectric, sandwiching it with precious metals and sintering it. Since ceramic capacitors have a thick dielectric, they have lower capacitance than aluminum and tantalum electrolytic capacitors, but they are small and less prone to heat generation. [0004] Tantalum electrolytic capacitors have an oxide film formed on the tantalum powder. Tantalum electrolytic capacitors have the following characteristics: their electrostatic capacity is worse than that of aluminum electrolytic capacitors and highe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/04H01G9/00H01G9/052
CPCH01G9/045Y02T10/7022H01G9/052Y02T10/70H01G9/0525
Inventor 平敏文目秦将志
Owner TOYO ALUMINIUM KK
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