CN101354961B - Method for preparing conductive cuprum slurry for ceramic capacitor electrode - Google Patents
Method for preparing conductive cuprum slurry for ceramic capacitor electrode Download PDFInfo
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- CN101354961B CN101354961B CN2007100441697A CN200710044169A CN101354961B CN 101354961 B CN101354961 B CN 101354961B CN 2007100441697 A CN2007100441697 A CN 2007100441697A CN 200710044169 A CN200710044169 A CN 200710044169A CN 101354961 B CN101354961 B CN 101354961B
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Abstract
The invention relates to material for an electrode of a ceramic capacitor, in particular to a preparation method for conductive copper slurry for electrodes of a ceramic capacitor. The method comprises the following steps of: taking two portions of ethyl cellulose and one portion of a phenolic resin or a phenolic epoxy resin, adding 7 portions of a solvent and heating up to 80-95 DEG C, and stirring intensively till complete dissolution to prepare an ivory translucent organic binding agent; taking 5 portions of superfine copper powder undergoing surface treatment with a mean diameter of 1-3mum and 0.1 portions of borosilicate glass powder which is filtered through a 300-400-mesh screen and has a D50 of 0.5-1.5mu m, and mixing intensively; adding 3 portions of the organic binding agent into the blended powder for intensive grinding; and grinding till the slurry has fine appearance and is even without particles, and then adding 1 portion of the organic binding agent and 1 portion of a diluent agent for even stirring to obtain the conductive copper slurry. The preparation method replaces the noble metal silver with the copper with a relatively low price to prepare the conductive slurry which reaches the same performance, thereby effectively reducing the manufacturing cost of the ceramic capacitor.
Description
Technical field
The present invention relates to the electrode material of ceramic capacitor, be specifically related to a kind of method for preparing conductive cuprum slurry for ceramic capacitor electrode.
Background technology
Ceramic capacitor is through the development in a nearly century; now formed highly stable technical system; with the pottery is medium; with screen printing mode at medium two sides silver coating electrode and welding lead; and use epoxy resin to be widely used in television set as basic device at present as the ceramic condenser of insulating protective layer, various electronic applications such as electronic instrument.Along with popularizing of recent two decades household electrical appliance, the demand of ceramic condenser increases year by year, and then also progressively increases as the conductive silver paste demand of capacitance electrode, and to 2005, only the conductive silver paste use amount of China was just above 100 tons.
Argent is as the primary raw material of conductive silver paste, and the content in the silver slurry surpasses 50%, and along with the increase of conductive silver paste use amount, China also increases fast to the demand of argent.But to beginning in 2006, the international prices of raw and semifnished materials went up fast, and the precious metal raw material price rapidly goes up especially, and in 2006 1 year, international silver-colored valency rising range surpasses 200%, and price steadiness falls after rise hopeless in high price at present.The silver valency goes up, and as the corresponding rise of conductive silver paste price that the ceramic capacitor prime cost constitutes, has improved the manufacturing cost of ceramic capacitor greatly, and the development and the scale that have also restricted each components and parts producer enlarge.Therefore, how to reduce cost and become the subject matter that each components and parts manufacturer faces at present.
Summary of the invention
The object of the present invention is to provide a kind of method for preparing conductive cuprum slurry for ceramic capacitor electrode, it uses the relatively low metallic copper of price to replace present noble metal silver to make electrocondution slurry and reaches identical performance, can effectively reduce the manufacturing cost of ceramic capacitor.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of method for preparing conductive cuprum slurry for ceramic capacitor electrode is characterized in that it comprises the steps:
Steps A: the preparation organic bond, get 2 parts of ethyl celluloses, 1 part of phenolic resins or novolac epoxy resin add 7 parts of solvents and are heated to 80-95 ℃, are stirred well to dissolving fully and make the translucent organic bond of milky;
Step B: get 5 parts of surface-treated superfine cupper powders, average grain diameter 1-3um, D500.5-1.5um, 0.1 part of the borosilicate glass powder after 300-400 orders filter fully mixes together;
Step C: the powder that mixes is added 3 parts of organic bonds fully mill;
Step D: be milled to slurry outward appearance exquisiteness, when evenly not having particle, add 1 part of organic bond again, 1 part of diluent stirs, and promptly can be made into conductive copper paste.
Described method for preparing conductive cuprum slurry for ceramic capacitor electrode is characterized in that the solvent in the described steps A comprises terpinol, diethyl phthalate, dibutyl phthalate, dioctyl phthalate, one or more in the phenmethylol.
Described method for preparing conductive cuprum slurry for ceramic capacitor electrode, it is characterized in that the diluent among the described step D is a terpinol, diethyl phthalate, dioctyl phthalate, diethylene glycol monobutyl ether, one or more in the diethylene glycol monobutyl ether acetate.
Embodiment
The invention discloses a kind of method for preparing conductive cuprum slurry for ceramic capacitor electrode, it comprises the steps:
Steps A: preparation organic bond, get 2 parts of ethyl celluloses, 1 part of phenolic resins or novolac epoxy resin, add 7 parts of solvents and (comprise terpinol, diethyl phthalate, dibutyl phthalate, dioctyl phthalate, in the phenmethylol one or more) be heated to 8095 ℃, be stirred well to dissolving fully and make the translucent organic bond of milky;
Step B: get 5 parts of surface-treated superfine cupper powders, average grain diameter 1-3um, D500.5-1.5um, 0.1 part of the borosilicate glass powder after 300400 orders filter fully mixes together;
Step C: the powder that mixes is added 3 parts of organic bonds fully mill;
Step D: be milled to slurry outward appearance exquisiteness, during evenly no particle, add 1 part of organic bond again, 1 part of diluent (terpinol, diethyl phthalate, dioctyl phthalate, diethylene glycol monobutyl ether, in the diethylene glycol monobutyl ether acetate one or more) stir, promptly can be made into conductive copper paste.
The conductive copper paste that uses the inventive method to make, the outward appearance shiny red, viscosity 50-80Kcps, better mobile, use 200 order silk screen printings, clear patterns, indeformable.But at 5 minutes bone dries of 150 ℃ of heated-air dryings.
With the potsherd that prints at N
2High temperature sintering in the gas atmosphere, sintering temperature curve are step curve, (total 1 hour cycle is heated up cooling each 25 minutes, 600-700 ℃ of high temperature section 10 minutes).The potsherd that sinters can carry out welding lead by present normal process, and insulation such as seals at technological operation, makes the ceramic capacitor finished product.Its electrical property attribute reaches corresponding ceramic capacitor requirement fully, sees also table 1):
Embodiment 1
A kind of method for preparing conductive cuprum slurry for ceramic capacitor electrode
Steps A: preparation organic bond, get 2 parts of ethyl celluloses, 1 part in phenolic resins, add 7 parts of solvents and (comprise terpinol, diethyl phthalate, dibutyl phthalate, dioctyl phthalate, in the phenmethylol one or more) be heated to 80 ℃, be stirred well to dissolving fully and make the translucent organic bond of milky;
Step B: get 5 parts of surface-treated superfine cupper powders, average grain diameter 1, D500.5um, 0.1 part of the borosilicate glass powder after 300 orders filter fully mixes together;
Step C: the powder that mixes is added 3 parts of organic bonds fully mill;
Step D: be milled to slurry outward appearance exquisiteness, during evenly no particle, add 1 part of organic bond again, 1 part of diluent (terpinol, diethyl phthalate, dioctyl phthalate, diethylene glycol monobutyl ether, in the diethylene glycol monobutyl ether acetate one or more) stir, promptly can be made into conductive copper paste.
Embodiment 2
A kind of method for preparing conductive cuprum slurry for ceramic capacitor electrode
Steps A: preparation organic bond, get 2 parts of ethyl celluloses, 1 part of novolac epoxy resin, add 7 parts of solvents and (comprise terpinol, diethyl phthalate, dibutyl phthalate, dioctyl phthalate, in the phenmethylol one or more) be heated to 95 ℃, be stirred well to dissolving fully and make the translucent organic bond of milky;
Step B: get 5 parts of surface-treated superfine cupper powders, average grain diameter 3um, D501.5um, 0.1 part of the borosilicate glass powder after 400 orders filter fully mixes together;
Step C: the powder that mixes is added 3 parts of organic bonds fully mill;
Step D: be milled to slurry outward appearance exquisiteness, during evenly no particle, add 1 part of organic bond again, 1 part of diluent (terpinol, diethyl phthalate, dioctyl phthalate, diethylene glycol monobutyl ether, in the diethylene glycol monobutyl ether acetate one or more) stir, promptly can be made into conductive copper paste.
By the foregoing description checking, use the inventive method to prepare conductive cuprum slurry for ceramic capacitor electrode, present conductive silver paste can be effectively replaced, and N need be increased except sintering process
2Outside the atmosphere, other technologies can be abideed by existing operating procedure and remain unchanged the fringe cost of having avoided process variations to bring.The ceramic capacitor of Sheng Chaning when the primary raw material cost significantly reduces, has greatly improved the market competitiveness of components and parts like this.
Being preferred embodiment of the present invention only in sum, is not to be used for limiting practical range of the present invention.Be that all equivalences of doing according to the content of the present patent application claim change and modification, all should be technology category of the present invention.
Claims (3)
1. a method for preparing conductive cuprum slurry for ceramic capacitor electrode is characterized in that it comprises the steps:
Steps A: the preparation organic bond, get 2 parts of ethyl celluloses, 1 part of phenolic resins or novolac epoxy resin add 7 parts of solvents and are heated to 80-95 ℃, are stirred well to dissolving fully and make the translucent organic bond of milky;
Step B: get 5 parts of surface-treated superfine cupper powders, average grain diameter 1-3um, D50 0.5-1.5um, 0.1 part of the borosilicate glass powder after the 300-400 order filters fully mixes together;
Step C: the powder that mixes is added 3 parts of organic bonds fully mill;
Step D: be milled to slurry outward appearance exquisiteness, when evenly not having particle, add 1 part of organic bond again, 1 part of diluent stirs, and promptly can be made into conductive copper paste.
2. method for preparing conductive cuprum slurry for ceramic capacitor electrode according to claim 1 is characterized in that solvent in the described steps A comprises one or more in terpinol, diethyl phthalate, dibutyl phthalate, dioctyl phthalate, the phenmethylol.
3. method for preparing conductive cuprum slurry for ceramic capacitor electrode according to claim 1 and 2 is characterized in that diluent among the described step D is one or more in terpinol, diethyl phthalate, dioctyl phthalate, diethylene glycol monobutyl ether, the diethylene glycol monobutyl ether acetate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100441697A CN101354961B (en) | 2007-07-25 | 2007-07-25 | Method for preparing conductive cuprum slurry for ceramic capacitor electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100441697A CN101354961B (en) | 2007-07-25 | 2007-07-25 | Method for preparing conductive cuprum slurry for ceramic capacitor electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101354961A CN101354961A (en) | 2009-01-28 |
| CN101354961B true CN101354961B (en) | 2011-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007100441697A Expired - Fee Related CN101354961B (en) | 2007-07-25 | 2007-07-25 | Method for preparing conductive cuprum slurry for ceramic capacitor electrode |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505137A (en) * | 2014-12-10 | 2015-04-08 | 南京工业大学 | Conductive copper paste and preparation method and use thereof |
| CN109686473B (en) * | 2019-01-29 | 2020-06-30 | 大连海外华昇电子科技有限公司 | Soft-end electrode copper paste for multilayer ceramic capacitor and application |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1965381A (en) * | 2004-06-09 | 2007-05-16 | 费罗公司 | Copper termination inks containing lead free and cadmium free glasses for capacitors |
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- 2007-07-25 CN CN2007100441697A patent/CN101354961B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1965381A (en) * | 2004-06-09 | 2007-05-16 | 费罗公司 | Copper termination inks containing lead free and cadmium free glasses for capacitors |
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| CN101354961A (en) | 2009-01-28 |
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