CN103617843A - Method for producing back silver paste - Google Patents
Method for producing back silver paste Download PDFInfo
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- CN103617843A CN103617843A CN201310621298.3A CN201310621298A CN103617843A CN 103617843 A CN103617843 A CN 103617843A CN 201310621298 A CN201310621298 A CN 201310621298A CN 103617843 A CN103617843 A CN 103617843A
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- powder
- glass dust
- silver paste
- paste
- silver powder
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Abstract
The invention relates to a method for producing back silver paste. The method includes the following steps that S1, organic carriers, glass powder and silver powder are prepared; S2, the silver powder and the glass powder are weighed and poured into a mechanical blender mixer to be mixed, discharging is carried out after even mixing, and thus a mixture of the silver powder and the glass powder is obtained; S3, the organic carriers are added into the mixture of the silver powder and the glass powder, afterwards, the mixture together with the organic carriers is poured into a rotation type blender to be evenly stirred in a rotating mode, in the rotation stirring process, low-speed mixing is conducted first at the rotating speed of 30-100 turns/min until a pasty material with dry powder is achieved, then, the rotating speed is accelerated to 120-280 turns/min, and fast rotating mixing and vacuum pumping are carried out; S4, the mixture after being stirred in the rotating mode is ground for 5-10 times through a three-high mill, so that the back silver paste is obtained. According to the preparation method, the paste is rotated at a low speed to obtain the pastry material without the dry powder, then the paste is rotated and stirred at a high speed, vacuum pumping is further conducted, it is guaranteed that bubbles can be effectively removed, meanwhile, liquid components in the paste can be prevented from being extracted, paste formula proportion unbalance is avoided, and the viscosity is increased.
Description
Technical field
The present invention relates to back silver paste, be specifically related to a kind of production method of back silver paste.
Background technology
Back silver paste of solar cell, as the back silver slurry of solar cell size, is the important source material of solar cell, affects the key factor of solar cell power conversion.The preparation process of existing back silver paste or do not vacuumize step, cause slurry to contain a large amount of bubbles, silver slurry quality after impact coating, or with vacuumizing step, but vacuumize for a long time, easily cause liquid component in slurry to be extracted by undue, cause formula of size proportional imbalance, it is large that viscosity becomes, and affects the coating property of slurry.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of production method of back silver paste, the formula of size ratio obtaining by the method be difficult for unbalance and in it bubble can effectively be removed.
The technical issues that need to address of the present invention are achieved through the following technical solutions: a kind of production method of back silver paste, and it comprises following basic step:
S1. prepare respectively organic carrier, glass dust and silver powder;
S2. weigh silver powder and glass dust, pour in mechanical batch mixer and mix, evenly rear discharging to be mixed obtains the compound of silver powder and glass dust;
S3. in the compound of silver powder and glass dust, add organic carrier, pour subsequently in rotary agitator Stirring into even, in Stirring process, first with the rotating speed slow-speed of 30 ~ 100 revs/min, being mixed to form does not have the pasty state material of dry powder, then revs up and turn soon and mix and vacuumize to 120 ~ 280 revs/min;
S4. the mixture after Stirring is ground 5 ~ 10 times with three-high mill, obtain back silver paste.
Preferably, in described S1 step, the process of preparing organic carrier is: thickener is joined in organic solvent in proportion, organic solvent is heated to 60 ~ 90 ℃ by water-bath or oil bath, be stirred to thickener and dissolve completely, obtain organic carrier, then organic carrier is remained on 30 ~ 40 ℃ stand-by.
Further preferably, the whipping temp in described step S2 and S3 all remains on 30 ~ 40 ℃.
Preferably, in described step S1, the weight ratio of thickener and organic solvent is 5～10%:90 ~ 95%.
Preferably, in described step S2, the weight ratio of silver powder and glass dust is 85～90%:10 ~ 15%.
Preferably, in described step S3, silver powder and the compound of glass dust and the weight ratio of organic carrier are 75 ~ 80%:20 ~ 25%.
Preferably, described glass dust is unleaded bismuth borosilicate system.
Compared with prior art, advantage of the present invention and beneficial effect are: the preparation method of back silver paste of the present invention makes can fully mix between silver powder and glass dust by the premix of solid powder, reaches the microscopic uniformity between solid powder; On this basis, when solid powder and liquid material mixing, first slurry slow-speed is obtained not having after the thickener of powder High Rotation Speed to be again uniformly mixed and to vacuumize, can avoid the liquid component in slurry to be extracted away under long vacuum state, few owing to producing bubble in low speed rotation whipping process, in High Rotation Speed whipping process, produce bubble many, vacuumize with High Rotation Speed whipping process and carry out guaranteeing that bubble effectively removes simultaneously, avoid again the liquid component in slurry to be extracted, avoid causing formula of size proportional imbalance, viscosity to become large simultaneously.
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is described further.Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.
Embodiment 1
The preparation method of back silver paste of the present invention, comprises following basic step:
S1. prepare respectively organic carrier, glass dust and silver powder; Wherein the concrete preparation method of organic carrier is: by thickener ethyl cellulose is joined in organic solvent terpinol, terpinol is heated to 60 ℃ by water-bath or oil bath, after being stirred to ethyl cellulose and dissolving completely, obtain organic carrier, and by organic carrier remain on 30 ℃ stand-by, the weight ratio of thickener and organic solvent is 5%:95%; Glass dust is unleaded bismuth borosilicate system;
S2. weigh silver powder and glass dust, pour in mechanical batch mixer and mix, the weight ratio of silver powder and glass dust is 85%:15%, and evenly rear discharging to be mixed obtains the compound of silver powder and glass dust, and mixture temperature remains on 30 ℃;
S3. in the compound of silver powder and glass dust, add organic carrier, the compound of silver powder and glass dust and the weight ratio of organic carrier are 75%:25%; Pour subsequently in rotary agitator Stirring into even, in Stirring process, first with the rotating speed slow-speed of 100 revs/min, being mixed to form does not have the pasty state material of dry powder, then revs up and turn soon and mix and vacuumize to 280 revs/min; Wherein whipping temp all remains on 30 ℃;
S4. the mixture after Stirring is ground 10 times with three-high mill, obtain back silver paste.
Embodiment 2
The preparation method of back silver paste of the present invention, comprises following basic step:
S1. prepare respectively organic carrier, glass dust and silver powder; Wherein the concrete preparation method of organic carrier is: by thickener ethyl cellulose is joined in organic solvent terpinol, terpinol is heated to 90 ℃ by water-bath or oil bath, after being stirred to ethyl cellulose and dissolving completely, obtain organic carrier, and by organic carrier remain on 40 ℃ stand-by, the weight ratio of thickener and organic solvent is 10%:90%; Glass dust is unleaded bismuth borosilicate system;
S2. weigh silver powder and glass dust, pour in mechanical batch mixer and mix, the weight ratio of silver powder and glass dust is 90%:10%, and evenly rear discharging to be mixed obtains the compound of silver powder and glass dust, and mixture temperature remains on 40 ℃;
S3. in the compound of silver powder and glass dust, add organic carrier, the compound of silver powder and glass dust and the weight ratio of organic carrier are 80%:20%; Pour subsequently in rotary agitator Stirring into even, in Stirring process, first with the rotating speed slow-speed of 30 revs/min, being mixed to form does not have the pasty state material of dry powder, then revs up and turn soon and mix and vacuumize to 120 revs/min; Wherein whipping temp all remains on 40 ℃;
S4. the mixture after Stirring is ground 5 times with three-high mill, obtain back silver paste.
Embodiment 3
The preparation method of back silver paste of the present invention, comprises following basic step:
S1. prepare respectively organic carrier, glass dust and silver powder; Wherein the concrete preparation method of organic carrier is: by thickener ethyl cellulose is joined in organic solvent terpinol, terpinol is heated to 75 ℃ by water-bath or oil bath, after being stirred to ethyl cellulose and dissolving completely, obtain organic carrier, and by organic carrier remain on 35 ℃ stand-by, the weight ratio of thickener and organic solvent is 8%:92%; Glass dust is unleaded bismuth borosilicate system;
S2. weigh silver powder and glass dust, pour in mechanical batch mixer and mix, the weight ratio of silver powder and glass dust is 88%:12%, and evenly rear discharging to be mixed obtains the compound of silver powder and glass dust, and mixture temperature remains on 35 ℃;
S3. in the compound of silver powder and glass dust, add organic carrier, the compound of silver powder and glass dust and the weight ratio of organic carrier are 78%:22%; Pour subsequently in rotary agitator Stirring into even, in Stirring process, first with the rotating speed slow-speed of 80 revs/min, being mixed to form does not have the pasty state material of dry powder, then revs up and turn soon and mix and vacuumize to 200 revs/min; Wherein whipping temp all remains on 35 ℃;
S4. the mixture after Stirring is ground 8 times with three-high mill, obtain back silver paste.
Above-mentioned each embodiment is further illustrating that foregoing of the present invention is made, but the scope that should not be construed as the above-mentioned theme of the present invention only limits to above-described embodiment.It should be pointed out that for those skilled in the art, not departing under the prerequisite of the technology of the present invention principle, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a production method for back silver paste, is characterized in that, comprises following basic step:
S1. prepare respectively organic carrier, glass dust and silver powder;
S2. weigh silver powder and glass dust, pour in mechanical batch mixer and mix, evenly rear discharging to be mixed obtains the compound of silver powder and glass dust;
S3. in the compound of silver powder and glass dust, add organic carrier, pour subsequently in rotary agitator Stirring into even, in Stirring process, first with the rotating speed slow-speed of 30 ~ 100 revs/min, being mixed to form does not have the pasty state material of dry powder, then revs up and turn soon and mix and vacuumize to 120 ~ 280 revs/min;
S4. the mixture after Stirring is ground 5 ~ 10 times with three-high mill, obtain back silver paste.
2. the production method of back silver paste as claimed in claim 1, it is characterized in that, in described S1 step, the process of preparing organic carrier is: thickener is joined in organic solvent in proportion, organic solvent is heated to 60 ~ 90 ℃ by water-bath or oil bath, be stirred to thickener and dissolve completely, obtain organic carrier, then organic carrier is remained on 30 ~ 40 ℃ stand-by.
3. the production method of back silver paste as claimed in claim 2, is characterized in that, the whipping temp in described step S2 and S3 all remains on 30 ~ 40 ℃.
4. the production method of back silver paste as claimed in claim 1, is characterized in that, in described step S1, the weight ratio of thickener and organic solvent is 5～10%:90 ~ 95%.
5. the production method of back silver paste as claimed in claim 1, is characterized in that, in described step S2, the weight ratio of silver powder and glass dust is 85～90%:10 ~ 15%.
6. the production method of back silver paste as claimed in claim 1, is characterized in that, in described step S3, the compound of silver powder and glass dust and the weight ratio of organic carrier are 75 ~ 80%:20 ~ 25%.
7. the production method of the back silver paste as described in claim 1 to 5 any one, is characterized in that, described glass dust is unleaded bismuth borosilicate system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310621298.3A CN103617843A (en) | 2013-11-29 | 2013-11-29 | Method for producing back silver paste |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310621298.3A CN103617843A (en) | 2013-11-29 | 2013-11-29 | Method for producing back silver paste |
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| CN103617843A true CN103617843A (en) | 2014-03-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106952691A (en) * | 2017-03-20 | 2017-07-14 | 北京市合众创能光电技术有限公司 | The technique that whole temperature control makes positive silver paste |
| CN108597679A (en) * | 2018-04-13 | 2018-09-28 | 浙江中希电子科技有限公司 | A kind of surface treatment method of front side silver paste silver powder used for solar batteries |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814551A (en) * | 2010-01-15 | 2010-08-25 | 宁波晶鑫电子材料有限公司 | Preparation method of back silver paste of solar cell |
| US20110232747A1 (en) * | 2010-05-04 | 2011-09-29 | E. I. Du Pont De Nemours And Company | Thick-film pastes and solar cells made therefrom |
| CN103022433A (en) * | 2012-11-23 | 2013-04-03 | 彩虹集团公司 | Method for preparing lithium battery slurry |
-
2013
- 2013-11-29 CN CN201310621298.3A patent/CN103617843A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814551A (en) * | 2010-01-15 | 2010-08-25 | 宁波晶鑫电子材料有限公司 | Preparation method of back silver paste of solar cell |
| US20110232747A1 (en) * | 2010-05-04 | 2011-09-29 | E. I. Du Pont De Nemours And Company | Thick-film pastes and solar cells made therefrom |
| CN103022433A (en) * | 2012-11-23 | 2013-04-03 | 彩虹集团公司 | Method for preparing lithium battery slurry |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106952691A (en) * | 2017-03-20 | 2017-07-14 | 北京市合众创能光电技术有限公司 | The technique that whole temperature control makes positive silver paste |
| CN108597679A (en) * | 2018-04-13 | 2018-09-28 | 浙江中希电子科技有限公司 | A kind of surface treatment method of front side silver paste silver powder used for solar batteries |
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Application publication date: 20140305 |