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Anode tantalum block and preparation method thereof

A tantalum block and anode technology, which is applied in the field of anode tantalum block and its preparation, can solve the problems of large heat generation, restricted filtering effect, shortened product life, etc., so as to improve the use effect, reduce the ESR value, and improve the life and reliability. Effect

Inactive Publication Date: 2018-05-29
CHINA ZHENHUA GRP XINYUN ELECTRONICS COMP ANDDEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development and deepening of the industrial revolution, the precision requirements for components are becoming more and more stringent. As an important member of components, the reliability requirements for capacitors are also getting higher and higher, especially for non-solid tantalum electrolytic capacitors. Due to the particularity of this type of product, it is difficult to find a substitute at present, and compared with ceramic capacitors or solid tantalum capacitors, the equivalent series resistance value (ESR value) of this type of product is often higher, making the product The heat generated during use is greater, resulting in shorter product life, and at the same time restricting the filtering effect of such products, etc.

Method used

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  • Anode tantalum block and preparation method thereof
  • Anode tantalum block and preparation method thereof
  • Anode tantalum block and preparation method thereof

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preparation example Construction

[0027] The present invention also provides a method for preparing an anode tantalum block, which includes:

[0028] S.1 Press tantalum powder to form the green body of the anode tantalum block.

[0029] Among them, preferably, the specific volume of tantalum powder is 1000-70000μF·V / g, such as 2000μF·V / g, 3000μF·V / g, 4000μF·V / g, 8000μF·V / g, 10000μF·V / g, 15000μF·V / g, 25000μF·V / g, 40000μF·V / g, 60000μF·V / g or 65000μF·V / g, etc. At the same time, tantalum powder within this range is used to prepare the above-mentioned anode tantalum block, which can effectively improve the above-mentioned Electricity of the anode tantalum block.

[0030] Preferably, it also includes related parameters of designing a standard anode tantalum block forming sheet according to the specification and size of the anode tantalum block before pressing, and the relevant parameters include forming voltage, design specific volume, forming density, sintering temperature, and sintering time.

[0031] Wherein, t...

Embodiment 1

[0039] A kind of anode tantalum block, it is made by following method:

[0040] (1) According to the production principle of non-solid tantalum capacitors, the tantalum powder used for forming the anode tantalum block is selected, and the specific volume of the tantalum powder is 15000μF·V / g.

[0041] (2) Since the breakdown voltage of tantalum powder with a specific volume of 15000μF·V / g is about 200V, and the rated voltage of the product is 100V, the formation voltage of the anode tantalum block is designed to be 150V, and the external dimensions are based on this specification. set as According to the conventional compaction density range of this kind of tantalum powder is 5 ~ 6g / cm 3, set the compaction density to 5.5g / cm 3 .

[0042] (3) Use the tantalum powder selected in step (1) and select a conventional cylindrical mold according to the relevant parameters in step (2) to press to form an anode tantalum block.

[0043] (4) Vacuum sinter the formed anode tantalum b...

Embodiment 2

[0049] A method for preparing an anode tantalum block capable of reducing the ESR value of a non-solid electrolytic tantalum capacitor, comprising the following steps:

[0050] (1) According to the production principle of non-solid tantalum capacitors, the tantalum powder used for forming the anode tantalum block is selected, and the specific volume of the tantalum powder is 15000μF·V / g.

[0051] (2) Since the breakdown voltage of tantalum powder with a specific volume of 15000μF·V / g is about 200V, and the rated voltage of the product is 100V, the formation voltage of the anode tantalum block is designed to be 150V, and the external dimensions are based on this specification. set as According to the conventional compaction density range of this kind of tantalum powder is 5 ~ 6g / cm 3 , set the compaction density to 5.5g / cm 3 .

[0052] (3) Use the tantalum powder selected in step (1), and select a 4-petal cylinder according to the relevant parameters in step (2), that is, t...

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Abstract

The invention relates to an anode tantalum block and a preparation method thereof. The anode tantalum block comprises a column-shaped tantalum block body. A side wall of the column-shaped tantalum block body is provided with multiple grooves with equal intervals along a radial direction, each groove passes through two ends of the tantalum block body along an axial direction, the depth of each of the grooves is 5% to 80% of the radius of the tantalum block body, and the ESR value of a non-solid electrolyte tantalum capacitor is reduced. The preparation method of the anode tantalum block comprises the steps of pressing tantalum powder to form a green body of the anode tantalum block and carrying out vacuum sintering. The anode tantalum block which effectively reduces the ESR value of the non-solid electrolyte tantalum capacitor is prepared, and the industrial production is facilitated at the same time.

Description

technical field [0001] The invention relates to the technical field of manufacturing non-solid electrolyte tantalum capacitors, and in particular to an anode tantalum block and a preparation method thereof. Background technique [0002] Tantalum electrolytic capacitors are widely used in various civil and military electronic products due to their small size, large capacity, small leakage current, low loss, long life and many other excellent properties. With the development and deepening of the industrial revolution, the precision requirements for components are becoming more and more stringent. As an important member of components, the reliability requirements for capacitors are also getting higher and higher, especially for non-solid tantalum electrolytic capacitors. Due to the particularity of this type of product, it is difficult to find a substitute at present, and compared with ceramic capacitors or solid tantalum capacitors, the equivalent series resistance value (ESR ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/048H01G9/052H01G9/145
CPCH01G9/048H01G9/052H01G9/145H01G2009/05
Inventor 曾金萍潘齐凤肖毅王成兴李传龙张勇石洪富张麟朱文娟朱静琳陈果
Owner CHINA ZHENHUA GRP XINYUN ELECTRONICS COMP ANDDEV CO LTD
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