CN103065798A - Slice-typed niobium oxide capacitor graphite and silver paste layer preparation method - Google Patents
Slice-typed niobium oxide capacitor graphite and silver paste layer preparation method Download PDFInfo
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- CN103065798A CN103065798A CN2013100145129A CN201310014512A CN103065798A CN 103065798 A CN103065798 A CN 103065798A CN 2013100145129 A CN2013100145129 A CN 2013100145129A CN 201310014512 A CN201310014512 A CN 201310014512A CN 103065798 A CN103065798 A CN 103065798A
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Abstract
The invention discloses a slice-typed niobium oxide capacitor graphite and silver paste layer preparation method. The slice-typed niobium oxide capacitor graphite and silver paste layer preparation method includes the steps that a well-filmed niobium oxide block core is immersed into water-based graphite, benzyl alcohol solution and silver paste, and is dried and solidified and the like, and thereby finishing preparation of the niobium oxide capacitor graphite and silver paste layer. The slice-typed niobium oxide capacitor graphite and silver paste layer preparation method effectively restrains capacity change of niobium oxide capacitor at a high temperature of 125 DEG C by adopting treatment process of adding dipping benzyl alcohol solution before adding oiliness graphite, and thereby improving reliability and stability of the niobium oxide capacitor at a high temperature surrounding.
Description
Technical field
The invention belongs to field of capacitor manufacture, particularly relate to a kind of sheet type niobium oxide capacitor graphite, silver slurry layer preparation method.
Background technology
The niobium oxide capacitor is a kind of with the Novel electrolytic capacitor of niobium monoxide powder as core material, it not only has, and the tantalum capacitor volume is little, capacity is large, loss angle tangent is little, the advantage of electric performance stablity, also have and use the first-selected product of Low-voltage Low-power electronics that the voltage range of decrease is little, not burning feature, so niobium oxide capacitor becomes high speed processing.
At present, graphite, silver slurry layer are as the negative electrode of niobium capacitor, and traditional preparation method of niobium capacitor graphite, silver slurry layer is as follows: the tantalum niobium piece that tunicle is good immerses watersoluble plumbago, immerses oiliness graphite after the hot setting cooling, immerses at last the silver slurry.The niobium oxide capacitor adopts the preparation method's of this conventional graphite, silver slurry layer shortcoming to be: capacitor volume change under 125 DEG C high temperature is large, and capacitor can cause output waveform distortion, circuit to work because ambient temperature is too high.
Summary of the invention
For the problems referred to above, the present invention aims to provide a kind of graphite, silver slurry layer preparation method of sheet type niobium oxide capacitor, utilize the niobium oxide capacitor of the method manufacturing to satisfy the technical standard requirement 125 ℃ of lower volume change, and can under 125 ℃ environment, keep normal operation.
The technical scheme that the present invention takes is:
A kind of sheet type niobium oxide capacitor graphite, silver slurry layer preparation method, described the method may further comprise the steps:
1) the niobium oxide piece fuse that tunicle is good immerses watersoluble plumbago, and impregnating depth is 3/4～4/5 of fuse height, and dip time is 1～10S;
2) after the taking-up, sop up the unnecessary watersoluble plumbago in fuse bottom with kraft capacitor paper, room temperature is placed 5～10min, puts into 140～200 ℃ of baking ovens again and solidifies 10～60min;
3) niobium oxide piece fuse takes out and is cooled to room temperature, immerses benzyl alcohol solution, and impregnating depth is 3/4～4/5 of fuse total height, and dip time is 1～10S;
4) after the taking-up, the fuse that will flood benzyl alcohol solution immerses oiliness graphite, and impregnating depth is 3/4～4/5 of fuse total height, and dip time is 1～10S;
5) slowly take out, sop up the unnecessary oiliness graphite in fuse bottom with kraft capacitor paper, room temperature is placed 5～10min, puts into 140～200 ℃ of baking ovens again and solidifies 10～60min;
6) above-mentioned niobium oxide piece fuse taking-up is cooled to room temperature, immerses the silver slurry, impregnating depth is 3/4～4/5 of fuse total height, and dip time is 1～10S;
7) after the taking-up, sop up the unnecessary silver slurry in fuse bottom with kraft capacitor paper, room temperature is placed 5～10min, puts into 160～230 ℃ of baking ovens again and solidifies 10～60min.
As the present invention further optimization scheme, described step 1) watersoluble plumbago is former client China ink according to volume ratio: deionized water=1:(2～10) preparation.
As the present invention further optimization scheme, described step 4) oiliness graphite is former client China ink according to volume ratio: phenmethylol=1:(1～5) preparation.
As the present invention further optimization scheme, described step 6) silver slurry is former bottle silver slurry according to volume ratio: butyl acetate=1:(2～10) preparation.
The present invention has effectively suppressed the sheet type niobium oxide capacitor in the 125 DEG C high temperature volume change owing to adopted the treatment process that increases the dipping benzyl alcohol solution before oiliness graphite, has improved the reliability and stability of niobium oxide capacitor in hot environment.
Embodiment
The invention will be further described below in conjunction with specific embodiment, is used for explaining the present invention in illustrative examples and the explanation of this invention, but not as a limitation of the invention.
Embodiment 1
1) the niobium oxide piece fuse immersion volume ratio that tunicle is good is former client China ink: the watersoluble plumbago of deionized water=1:2, impregnating depth are 3/4 of fuse height, and dip time is 3S;
2) after the taking-up, sop up the unnecessary watersoluble plumbago in fuse bottom with kraft capacitor paper, room temperature is placed 5min, puts into 140 ℃ of baking ovens again and solidifies 10min;
3) niobium oxide piece fuse takes out and is cooled to room temperature, immerses benzyl alcohol solution, and impregnating depth is 3/4 of fuse total height, and dip time is 3S;
4) after the taking-up, it is former client China ink that the fuse that flooded benzyl alcohol solution is immersed volume ratio: the oiliness graphite of phenmethylol=1:2, impregnating depth are 3/4 of fuse total height, and dip time is 3S;
5) slowly take out, sop up the unnecessary oiliness graphite in fuse bottom with kraft capacitor paper, room temperature is placed 5min, puts into 140 ℃ of baking ovens again and solidifies 10min;
6) above-mentioned niobium oxide piece fuse taking-up is cooled to room temperature, immersing volume ratio is former bottle silver slurry: the silver of butyl acetate=1:2 is starched, and impregnating depth is 3/4 of fuse total height, and dip time is 3S;
7) after the taking-up, sop up the unnecessary silver slurry in fuse bottom with kraft capacitor paper, room temperature is placed 5min, puts into 160 ℃ of baking ovens again and solidifies 10min.
Embodiment 2
1) the niobium oxide piece fuse immersion volume ratio that tunicle is good is former client China ink: the watersoluble plumbago of deionized water=1:10, impregnating depth are 4/5 of fuse height, and dip time is 10S;
2) after the taking-up, sop up the unnecessary watersoluble plumbago in fuse bottom with kraft capacitor paper, room temperature is placed 10min, puts into 200 ℃ of baking ovens again and solidifies 60min;
3) niobium oxide piece fuse takes out and is cooled to room temperature, immerses benzyl alcohol solution, and impregnating depth is 4/5 of fuse total height, and dip time is 10S;
4) after the taking-up, it is former client China ink that the fuse that flooded benzyl alcohol solution is immersed volume ratio: the oiliness graphite of phenmethylol=1:5, impregnating depth are 4/5 of fuse total height, and dip time is 10S;
5) slowly take out, sop up the unnecessary oiliness graphite in fuse bottom with kraft capacitor paper, room temperature is placed 10min, puts into 200 ℃ of baking ovens again and solidifies 60min;
6) above-mentioned niobium oxide piece fuse taking-up is cooled to room temperature, immersing volume ratio is former bottle silver slurry: the silver of butyl acetate=1:10 is starched, and impregnating depth is 4/5 of fuse total height, and dip time is 10S;
7) after the taking-up, sop up the unnecessary silver slurry in fuse bottom with kraft capacitor paper, room temperature is placed 10min, puts into 230 ℃ of baking ovens again and solidifies 60min.
Embodiment 3
1) the niobium oxide piece fuse immersion volume ratio that tunicle is good is former client China ink: the watersoluble plumbago of deionized water=1:5, impregnating depth are 3/4 of fuse height, and dip time is 5S;
2) after the taking-up, sop up the unnecessary watersoluble plumbago in fuse bottom with kraft capacitor paper, room temperature is placed 10min, puts into 180 ℃ of baking ovens again and solidifies 30min;
3) niobium oxide piece fuse takes out and is cooled to room temperature, immerses benzyl alcohol solution, and impregnating depth is 3/4 of fuse total height, and dip time is 5S;
4) after the taking-up, it is former client China ink that the fuse that flooded benzyl alcohol solution is immersed volume ratio: the oiliness graphite of phenmethylol=1:3, impregnating depth are 3/4 of fuse total height, and dip time is 5S;
5) slowly take out, sop up the unnecessary oiliness graphite in fuse bottom with kraft capacitor paper, room temperature is placed 10min, puts into 180 ℃ of baking ovens again and solidifies 30min;
6) above-mentioned niobium oxide piece fuse taking-up is cooled to room temperature, immersing volume ratio is former bottle silver slurry: the silver of butyl acetate=1:5 is starched, and impregnating depth is 3/4～4/5 of fuse total height, and dip time is 1～10S;
7) after the taking-up, sop up the unnecessary silver slurry in fuse bottom with kraft capacitor paper, room temperature is placed 10min, puts into 200 ℃ of baking ovens again and solidifies 30min.
Contrast above embodiment, embodiment 3 is optimum preparation method of the present invention, and the niobium oxide capacitor that employing this method is made is the volume change value of control capacitor when 125 DEG C high temperature effectively, makes it satisfy the technical standard requirement.
Choosing specification in the present embodiment is volume change parameter list such as table 1 and the table 2 of niobium oxide capacitor under 125 DEG C high temperature of 4V-330 μ F, 4V-470 μ F:
Table 14V-330 μ F
Table 24V-470 μ F
The volume change ginseng table of contrast same size traditional handicraft niobium oxide capacitor under 125 DEG C high temperature, such as table 3 and table 4:
Table 34V-330 μ F specification product capability value
Table 44V-470 μ F specification product capability value
Table 1, table 2 are compared with table 3, table 4 respectively, the niobium oxide capacitor of preparation method of the present invention and traditional handicraft preparation relatively, when 125 DEG C high temperature, the volume change of the niobium oxide capacitor of same model capacity obviously significantly reduces, and can satisfy sheet type niobium oxide capacitor technology standard.
Technical scheme of the present invention is not limited to the restriction of above-mentioned specific embodiment, and the technology distortion that every technical scheme according to the present invention is made all falls within protection scope of the present invention.
Claims (4)
1. a sheet type niobium oxide capacitor graphite, silver slurry layer preparation method is characterized in that described the method may further comprise the steps:
1) the niobium oxide piece fuse that tunicle is good immerses watersoluble plumbago, and impregnating depth is 3/4～4/5 of fuse height, and dip time is 1～10S;
2) after the taking-up, sop up the unnecessary watersoluble plumbago in fuse bottom with kraft capacitor paper, room temperature is placed 5～10min, puts into 140～200 ℃ of baking ovens again and solidifies 10～60min;
3) niobium oxide piece fuse takes out and is cooled to room temperature, immerses benzyl alcohol solution, and impregnating depth is 3/4～4/5 of fuse total height, and dip time is 1～10S;
4) after the taking-up, the fuse that will flood benzyl alcohol solution immerses oiliness graphite, and impregnating depth is 3/4～4/5 of fuse total height, and dip time is 1～10S;
5) slowly take out, sop up the unnecessary oiliness graphite in fuse bottom with kraft capacitor paper, room temperature is placed 5～10min, puts into 140～200 ℃ of baking ovens again and solidifies 10～60min;
6) above-mentioned niobium oxide piece fuse taking-up is cooled to room temperature, immerses the silver slurry, impregnating depth is 3/4～4/5 of fuse total height, and dip time is 1～10S;
7) after the taking-up, sop up the unnecessary silver slurry in fuse bottom with kraft capacitor paper, room temperature is placed 5～10min, puts into 160～230 ℃ of baking ovens again and solidifies 10～60min.
2. a niobium oxide capacitor graphite claimed in claim 1, silver slurry layer preparation method, it is characterized in that: described step 1) watersoluble plumbago is former client China ink according to volume ratio: deionized water=1:(2～10) preparation.
3. a niobium oxide capacitor graphite claimed in claim 1, silver slurry layer preparation method, it is characterized in that: described step 4) oiliness graphite is former client China ink according to volume ratio: phenmethylol=1:(1～5) preparation.
4. a niobium oxide capacitor graphite claimed in claim 1, silver slurry layer preparation method, it is characterized in that: described step 6) silver slurry is former bottle silver slurry according to volume ratio: butyl acetate=1:(2～10) preparation.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021940A (en) * | 2014-05-29 | 2014-09-03 | 中国振华（集团）新云电子元器件有限责任公司 | Cathode preparation process for reducing niobium oxide capacitor equivalent series resistance |
| CN106057468A (en) * | 2016-06-14 | 2016-10-26 | 东莞市联洲知识产权运营管理有限公司 | Preparation process of chip type niobium electrolytic capacitor |
| CN113178333A (en) * | 2021-04-28 | 2021-07-27 | 中国振华(集团)新云电子元器件有限责任公司(国营第四三二六厂) | Silver paste dipping method for tantalum capacitor |
| CN115394559A (en) * | 2022-09-23 | 2022-11-25 | 中国振华(集团)新云电子元器件有限责任公司(国营第四三二六厂) | Method for reducing ESR (equivalent series resistance) of graphite silver paste process of solid electrolyte sheet type tantalum capacitor |
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| CN1614725A (en) * | 2004-12-07 | 2005-05-11 | 宁夏星日电子股份有限公司 | Producing method for solid niobium capacitor |
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| CN101329951A (en) * | 2008-05-23 | 2008-12-24 | 电子科技大学 | High-frequency nonpolarity solid tantalum electrolytic capacitor with lead wire and manufacturing method thereof |
| US20110096466A1 (en) * | 2009-10-23 | 2011-04-28 | Avx Corporation | External Coating for a Solid Electrolytic Capacitor |
| CN102820135A (en) * | 2012-08-24 | 2012-12-12 | 中国振华（集团）新云电子元器件有限责任公司 | Method for reducing change rate of high-temperature capacitance of niobium capacitor |
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| CN1614725A (en) * | 2004-12-07 | 2005-05-11 | 宁夏星日电子股份有限公司 | Producing method for solid niobium capacitor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021940A (en) * | 2014-05-29 | 2014-09-03 | 中国振华（集团）新云电子元器件有限责任公司 | Cathode preparation process for reducing niobium oxide capacitor equivalent series resistance |
| CN104021940B (en) * | 2014-05-29 | 2016-09-07 | 中国振华（集团）新云电子元器件有限责任公司 | A kind of negative electrode preparation technology reducing niobium oxide capacitor equivalent series resistance |
| CN106057468A (en) * | 2016-06-14 | 2016-10-26 | 东莞市联洲知识产权运营管理有限公司 | Preparation process of chip type niobium electrolytic capacitor |
| CN113178333A (en) * | 2021-04-28 | 2021-07-27 | 中国振华(集团)新云电子元器件有限责任公司(国营第四三二六厂) | Silver paste dipping method for tantalum capacitor |
| CN115394559A (en) * | 2022-09-23 | 2022-11-25 | 中国振华(集团)新云电子元器件有限责任公司(国营第四三二六厂) | Method for reducing ESR (equivalent series resistance) of graphite silver paste process of solid electrolyte sheet type tantalum capacitor |
| CN115394559B (en) * | 2022-09-23 | 2023-06-20 | 中国振华(集团)新云电子元器件有限责任公司(国营第四三二六厂) | Method for reducing ESR (equivalent series resistance) of graphite silver paste process of solid electrolyte sheet type tantalum capacitor |
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Application publication date: 20130424 |