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A kind of manufacturing method of anode

A manufacturing method and anode technology, applied in capacitor electrodes, capacitors, circuits, etc., can solve the problems of low product capacity extraction rate, local pelletization of tantalum powder, dead holes in pellets, etc., to reduce friction and reduce dead holes. "Proportion, the effect of improving liquidity

Active Publication Date: 2019-01-18
SHENZHEN SURPASS STRUCTURE CERAMICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking tantalum capacitors as an example, if you want to achieve miniaturization, you must use ultra-high specific volume tantalum powder, and as the specific volume of tantalum powder increases, the particle size of tantalum powder becomes smaller and smaller, making the tantalum powder after reconciliation easy to localize. Pelletization, resulting in some "dead holes" easily appearing inside the pellet after the anode block is formed. When the cathode layer is covered with manganese dioxide, the interior is not easy to penetrate, resulting in low capacity extraction rate of the product, large loss and other quality problems

Method used

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  • A kind of manufacturing method of anode
  • A kind of manufacturing method of anode

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Effect test

Embodiment 1

[0028] Tantalum powder with a specific volume of 100000 μF·V / g was used to press into an anode block with a powder weight of 26 mg and a size of 1.16 mm×2.35 mm×1.75 mm. The specific steps are: take 5 g of polycarbonate with a molecular weight of 200,000 and dissolve it in 65 g of acetone, and stir it evenly for later use; mix the polycarbonate solution with 200 g of tantalum powder, place it in a rotary agitator, and stir it at 60°C for 2 hours; Import the mixed tantalum powder into the powder tank of the molding machine, and continuously press the anode block; put the formed anode block into the sintering furnace, dewax at 400°C for 30 minutes, then heat up to the firing temperature for 20 minutes for sintering, and then cool Below 50°C, form an anode and put it in a vacuum drying dish to cool to room temperature for later use.

Embodiment 2

[0030] Tantalum powder with a specific volume of 120000 μF·V / g was used to press into an anode block with a powder weight of 26 mg and a size of 1.15 mm×2.35 mm×1.75 mm. The specific steps are: take 6g of polycarbonate with a molecular weight of 300,000 and dissolve it in 94g of acetone, stir well for later use; mix the polycarbonate solution with 200g of tantalum powder evenly, place it in a rotary stirrer, and stir at 60°C for 2 hours; Import the mixed tantalum powder into the powder tank of the molding machine, and continuously press the anode block; put the formed anode block into the sintering furnace, dewax at 400°C for 30 minutes, then heat up to the firing temperature for 20 minutes for sintering, and then cool Below 50°C, form an anode and put it in a vacuum drying dish to cool to room temperature for later use.

Embodiment 3

[0032] Tantalum powder with a specific volume of 150000 μF·V / g was used to press into an anode block with a powder weight of 9.8 mg and a size of 1.04 mm×1.20 mm×1.40 mm. The specific steps are: take 8 g of polycarbonate with a molecular weight of 300,000 and dissolve it in 92 g of acetone, and stir it evenly for later use; mix the polycarbonate solution with 200 g of tantalum powder, place it in a rotary agitator, and stir it at 60°C for 2 hours; Import the mixed tantalum powder into the powder tank of the molding machine, and continuously press the anode block; put the formed anode block into the sintering furnace, dewax at 400°C for 30 minutes, then heat up to the firing temperature for 20 minutes for sintering, and then cool Below 50°C, form an anode and put it in a vacuum drying dish to cool to room temperature for later use.

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Abstract

The invention discloses a manufacturing method of an anode. The method comprises the following steps: S1, dissolving a polycarbonate adhesive into a solvent to prepare an adhesive solution; S2, uniformly mixing anode powder into the adhesive solution, and stirring the mixture until the solvent is completely volatilized; S3, compacting the well mixed anode power in the second step to form an anode block; and S4, dewaxing and sintering the anode block to form the anode. The manufacturing method of the anode, disclosed by the invention, can improve the capacity extraction rate of a solid electrolytic capacitor.

Description

technical field [0001] The invention relates to a method for manufacturing an anode. Background technique [0002] With the development of science and technology, various terminal electronic products are becoming more and more miniaturized, which in turn requires the continuous miniaturization of electronic components. In addition, with the rise of electronic products in the field of smart wearables, the miniaturization of electronic components has become urgent. Taking tantalum capacitors as an example, if you want to achieve miniaturization, you must use ultra-high specific volume tantalum powder, and as the specific volume of tantalum powder increases, the particle size of tantalum powder becomes smaller and smaller, making the tantalum powder after reconciliation easy to localize. Pelletization, resulting in some "dead holes" easily appearing inside the anode block after forming the anode block. When the cathode layer is covered with manganese dioxide, the interior is n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042H01G9/04
CPCH01G9/04H01G9/042
Inventor 齐兆雄吴维芬曾台彪曾宪旦方金富
Owner SHENZHEN SURPASS STRUCTURE CERAMICS CO LTD
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