CN108735337A - A kind of conductive silver paste and preparation method thereof - Google Patents
A kind of conductive silver paste and preparation method thereof Download PDFInfo
- Publication number
- CN108735337A CN108735337A CN201810350795.7A CN201810350795A CN108735337A CN 108735337 A CN108735337 A CN 108735337A CN 201810350795 A CN201810350795 A CN 201810350795A CN 108735337 A CN108735337 A CN 108735337A
- Authority
- CN
- China
- Prior art keywords
- silver paste
- conductive silver
- organic
- powder
- polyamide wax
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Conductive Materials (AREA)
Abstract
The invention discloses a kind of conductive silver paste and preparation method thereof, the conductive silver paste includes following component and respective percentage composition：Silver powder 45-80%, organic carrier 15-50%, the thixotropic agent 0.6-3.5% after activation and auxiliary agent 0.4-2.0%；The organic carrier includes following component and respective percentage composition：Organic resin 10-20%, organic solvent 80-90%；Organic solvent is selected from diethylene glycol, dibasic ester (DBE), diethylene glycol ether acetate, dibutyl phthalate.The present invention merges the preparation of organic adhesive phase and organic carrier, shortens the production cycle, improves production efficiency；Thixotropic agent and organic resin are separately disperseed in organic solvent, thixotropic agent dispersion can be avoided improper and lost activity, the thixotropic index of conductive silver paste is improved by the present invention；Commercially available polyamide wax is ground in grinder, obtains the smaller polyamide wax powder of grain size, thixotropic property can be not fully exerted.
Description
Technical field
The invention belongs to touch screen fields, and in particular to a kind of conductive silver paste and preparation method thereof.
Background technology
The 1970s, electric slurry started to rise, and touch screen silver paste is also met the tendency of, and especially touch screen is in mobile phone
After upper Successful utilization, it has been found that it can be optimized with that can save many cumbersome input steps with simplifying operation of equipment interface
Equipment appearance so that the advantages that human-computer interaction is more convenient, warm so that touch screen silver paste dosage is significantly increased.According to related media
Report, the annual average rate of increase of whole touch panel reach 50%, it can be seen that, it is not only currently huge to the demand of touch screen
Greatly, and the development prospect of touch screen is very optimistic.And the conductive silver paste needed for touch screen is manufactured, it is existing available on the market most
Number is all that content of halogen is exceeded, does not meet current environmental requirement.Touch screen conductive silver paste mainly by silver powder, organic resin, have
Solvent and auxiliary agent composition, now common organic resin is typically all that content of halogen is exceeded.Therefore it needs to develop a kind of environmental protection
The conductive silver paste of Halogen.
Number of patent application CN201610521951.2 discloses a kind of conductive silver paste and preparation method thereof, and this method uses nothing
The conductive silver paste that content of halogen is less than detection limit is prepared as Binder Phase in halogen organic resin.But this method preparation time
Long, production efficiency is not high；Organic adhesive phase and organic carrier are prepared separately in the method, and the production cycle is long, and thixotropic agent with have
Airborne body disperses in organic solvent together, and thixotropic agent at relatively high temperatures, is easy to lose activity for a long time.This method is prepared
Silver paste thixotropic index it is low, the silver wire resolution ratio printed out is not high, cannot be satisfied fining circuit print request.
Invention content
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of conductive silver paste and preparation method thereof.
The present invention provides a kind of conductive silver pastes, including following component and respective percentage composition：Silver powder 45-80%, it is organic
Carrier 15-50%, the thixotropic agent 0.6-3.5% after activation and auxiliary agent 0.4-2.0%.
Preferably, the thixotropic agent after the activation is polyamide wax powder.
Preferably, the organic carrier includes following component and respective mass percentage：Organic resin 10-20%, has
Solvent 80-90%；Organic solvent is selected from diethylene glycol, dibasic ester, diethylene glycol ether acetate, two fourth of phthalic acid
It is one or more in ester.
Preferably, the organic resin is selected from rosin, newtrex, focus ratio, polyamide, acrylic acid tree
It is a variety of in fat, Malin's acid resin, organic siliconresin.
Preferably, the silver powder is flake silver powder.
Preferably, the grain size D50 of the silver powder is 1.4-1.6 μm, tap density 3.4-3.8g/cm3。
Heretofore described auxiliary agent is one or more in oleic acid, dimethicone, BYK-110.
The present invention also provides a kind of preparation methods of conductive silver paste, include the following steps：
1) prepared by organic carrier：Organic resin 10-20% is weighed by mass percentage, organic solvent 80-90% is in 60-
It is stirred and evenly mixed at 95 DEG C；
2) thixotropic agent activates：Polyamide wax and dimethylbenzene are ground in water-bath grinder, obtained polyamide wax powder with
Butyl acetate is dispersed with stirring uniformly at 55-80 DEG C；
3) prepared by conductive silver paste：Silver powder 45-80%, organic carrier 15-50%, after activation are weighed by mass percentage
Polyamide wax powder 0.6-3.5% and auxiliary agent 0.4-2.0% are dispersed with stirring, and roll-in to silver paste reaches fineness requirement.
Preferably, the grain size D50 of polyamide wax powder described in step 2) is 4-5 μm.
Preferably, mixing speed described in step 2) is 500-600rpm, mixing time 15-40min.
Preferably, the fineness requirement of silver paste described in step 3) is no more than 6 μm.
Prepared in the present invention each raw material of conductive silver paste optimum quality percentage composition be silver powder 75%, organic carrier 23%,
Polyamide wax 1.34%, 0.22% dimethicone, 0.22% oleic acid and 0.22% BYK-110；Organic carrier is most
It is preferred that the DBE that material component and respective mass percentage are 10% is prepared, 60% diethylene glycol ether acetate, 10%
Dibutyl phthalate, 13% Malin's acid resin, 6% focus ratio, 0.7% rosin, 0.3% organosilicon tree
Fat.Electric conductivity using the conductive silver paste of above-mentioned most preferred scheme synthesis is best, and sheet resistance is 17m Ω/.
The beneficial effects of the invention are as follows：
1, the present invention merges the preparation of organic adhesive phase and organic carrier, shortens the production cycle, improves production efficiency.
2, the present invention separately disperses thixotropic agent and organic resin in organic solvent, individually activates, can avoid thixotroping
Agent dispersion is improper and loses activity, and improves the thixotropic index of conductive silver paste.
3, the present invention meets the requirement of environmental protection, the use of hybrid resin makes up using a variety of halogen-free organic resin mixing
Deficiency of the single resin in electric conductivity, adhesive force etc..
4, it is 40-50 μm that the thixotropic agent before present invention activation, which selects commercially available polyamide wax, grain size D50, then with dimethylbenzene
It is ground in water-bath grinder, obtains the polyamide wax powder that grain size D50 is 4-5 μm, grain size smaller, thixotropic property is fully sent out
It waves.
Thixotropy refers to system under agitation or other mechanisms, one kind that the viscosity or shear force of system change over time
Rheological phenomena, and system viscosity can be increased, and make it have thixotropic auxiliary agent and be referred to as thixotropic agent.Touch screen silver paste is being printed
In the process, it is desirable that the viscosity of silver paste becomes smaller, and at the end of printing, the viscosity of slurry becomes larger, and this requires silver pastes to have well
Thixotropy.
Conventional organic carrier is made of organic resin, thixotropic agent, organic solvent, and the preparation of thixotropic agent be divided into dissolving and it is molten
Swollen activation process, when being prepared for slurry, temperature is lower, and leads to the unstable of thixotropic agent and is precipitated, to influence slurry
Stability and without net tie printing effect.Widely used thixotropic agent is modified hydrogenated castor oil in touch screen silver paste now, but
It is that its result is not of great satisfaction in actual production, the range used is relatively narrow, is 50-70 DEG C.The present invention is using poly-
Amide waxe does thixotropic agent, and the more modified hydrogenated castor oil of temperature in use is wider, is -80 DEG C of room temperature.
The solvent type used when activation temperature and activation can influence the performance of thixotropic agent thixotropic property, entire to influence
The thixotropy of slurry.The activation of conventional thixotropic agent carries out during prepared by organic carrier or organic adhesive is mutually prepared,
The temperature of activation is higher, reaches 65 DEG C or more, and soak time 18-24h, activation temperature is excessively high, and thixotropy endowing agent can gradually dissolve
In a solvent, the thixotropy endowing agent being dissolved in solvent will lose gel network thixotroping structure, from molten during cooling
It is precipitated in agent, forms soft agglomerate gel particle, i.e., " returned thick ", and thixotropic agent is easy in prolonged activation process
Partly or entirely inactivation, thixotropy substantially reduce.If reducing activation temperature or soak time, the dispersion of resin being uneven.
In order to enable thixotroping activity preferably to play, when thixotropic agent and resin are separately boiled, organic carrier system can be adjusted respectively
The temperature of standby and thixotropic agent activation, makes both to be optimal level, the thixotropic property of thixotropic agent obtains maximum performance.
In the implementation process of the present invention, although can be by the tanning temperature of the two by separated tanning thixotropic agent and resin
It is adjusted to most preferably, but since can solvent be also the key factor that influences thixotropic agent and utmostly activate, is touched by existing
The limitation of screen silver paste dicyandiamide solution is touched, the activity of the modified hydrogenated castor oil of thixotropic agent does not obtain maximum performance.The present invention selects
It has taken with the more matched thixotropic agent polyamide wax of existing solvent butyl acetate, and has passed through attrition process polyamide
Wax makes up to best granularity.
Specific implementation mode
The preparation of silver powder
32Kg silver nitrates are dissolved under agitation in the deionized water of 40 DEG C of 300L, it is water-soluble to prepare silver nitrate
Liquid is added 3Kg oleic acid dispersants, is sufficiently mixed under stirring condition, and be aided with ultrasonic disperse, obtains silver salt solution.
10Kg sodium hydroxides are dissolved under agitation in the deionized water of 25 DEG C of 100L, sodium hydroxide is completely molten
Solution is configured to sodium hydrate aqueous solution.
10Kg sodium borohydrides are dissolved under agitation in 25 DEG C or so of 1000L deionized waters, reducing agent is obtained
Solution.
3Kg hydroxymethyl celluloses are completely dissolved under agitation in the deionized water of 25 DEG C or so of 20L, are obtained
Settle agent solution.
Under conditions of being stirred continuously, sodium hydrate aqueous solution is added slowly in silver salt solution, until solution
PH value is equal to 9, stops, being stirred for 20min, obtain the first mixed solution.The first mixed solution is at the uniform velocity flowed into 25min again
It in reducing agent solution, is sufficiently mixed under stirring condition, and be aided with ultrasonic disperse, obtains the second mixed solution.Then by sedimentation agent
Solution is added in the second mixed solution, stirs 20min, stops stirring, completes the synthesis of silver powder.
Waste reaction solution is filtered out, with the diafiltration repeatedly of 40 DEG C of deionized waters, until the conductivity of diafiltration waste water is less than 10 μ S/
Cm adds ethyl alcohol diafiltration, is put into 50 DEG C of baking oven until drying.By the silver powder after drying according to ratio of grinding media to material be 1:2 are added ball
In grinding jar, ball is the zirconia ball of a diameter of 2-3mm, and 2kg oleic acid is added in ball grinder, is taken out after ball milling 3h, piece is made
Shape silver powder.
The grain size D50 of gained silver powder is 1.4-1.6 μm, tap density 3.4-3.8g/cm3。
Embodiment 1
A kind of conductive silver paste, composition and weight percentage are：80% silver powder, 15% organic carrier, 3.5% lives
Polyamide wax powder after change, 0.5% dimethicone, 0.5% oleic acid, 0.5% BYK-110.
1) prepared by organic carrier：Weigh the DBE for accounting for organic resin and organic solvent gross mass 10%, 60% diethylene glycol
Ethyl ether acetate ester, 10% dibutyl phthalate, 13% Malin's acid resin, 6% focus ratio, 0.7% pine
Perfume (or spice), 0.3% organic siliconresin are added in the double-planet power batch mixer batch mixer with water bath with thermostatic control, and adjusting bath temperature is
It 65 DEG C, mixing speed 800rpm, batch mixing 2h, crosses while hot during 200 mesh stainless steels sieve imports in turning barrel；
2) thixotropic agent activates：By polyamide wax (grain size D50 is 40-50 μm) purchased in market, bead, dimethylbenzene and press certain
Ratio be added in the sand mill with circulator bath, the ratio of polyamide wax and bead is 1.2：1.0, the amount of dimethylbenzene is with energy
It soaks subject to polyamide wax and bead.Grinding condition is 20 DEG C of bath temperature, grinding rate 2000rpm, 90min.It has ground
Cheng Hou, carries out ball powder separation, and filtering, drying obtain the polyamide wax powder that grain size D50 is 4-5 μm, by polyamide wax powder and diethyl
The addition of glycol monobutyl ether acetate has in the sand mill of water bath with thermostatic control, and the ratio of polyamide wax powder and butyl acetate is
1：10,65 DEG C, mixing speed 600rpm of temperature is set, 30min is stirred, is imported in transfer container；
3) prepared by conductive silver paste：Weigh the silver powder of 80% above-mentioned preparation, the organic carrier of 15% above-mentioned preparation, 3.5%
Polyamide wax powder after activation, 0.5% dimethicone, 0.5% oleic acid, 0.5% BYK-110 are placed in mixing tank,
Disperseed using double-planet power batch mixer.It is rolled using three-roller after room temperature dispersion, until fineness is less than or equal to 6 μ
m。
Embodiment 2
A kind of conductive silver paste, composition and weight percentage are：45% silver powder, 50% organic carrier, 3% activation
Polyamide wax powder afterwards, 2% dimethicone.
1) prepared by organic carrier：Weigh the diethylene glycol for accounting for organic resin and organic solvent gross mass 90%, 3.7% pine
Perfume (or spice), 6.3% newtrex are added in the double-planet power batch mixer batch mixer with water bath with thermostatic control, and it is 80 to adjust bath temperature
DEG C, mixing speed 600rpm, batch mixing 2h are crossed during 200 mesh stainless steels sieve imports while hot in turning barrel；
2) thixotropic agent activates：Polyamide wax (grain size D50 is 40-50 μm) purchased in market, bead, dimethylbenzene are added band and followed
In the sand mill of ring water-bath, the mass ratio of polyamide wax and bead is 1.2：1.0, the amount of dimethylbenzene is can soak polyamide wax
Subject to bead, grinding condition is 20 DEG C of bath temperature, grinding rate 2000rpm, 90min, after the completion of grinding, carries out ball powder
Separation, filtering, drying obtain the polyamide wax powder that grain size D50 is 4-5 μm；By polyamide wax powder and butyl acetic acid
Ester addition has in the sand mill of water bath with thermostatic control, and the mass ratio of polyamide wax powder and butyl acetate is 1：10, setting
55 DEG C, mixing speed 500rpm of temperature stirs 40min, imports in transfer container；
3) prepared by conductive silver paste：Weigh the silver powder of 45% above-mentioned preparation, the organic carrier of 50% above-mentioned preparation, after activation
3% polyamide wax powder, 2% dimethicone are placed in mixing tank, are disperseed using double-planet power batch mixer.Room temperature
It is rolled using three-roller after dispersion, until fineness is less than or equal to 6 μm.
Embodiment 3
A kind of conductive silver paste, composition and weight percentage are：70% silver powder, 29% organic carrier, 0.6% lives
Polyamide wax powder after change, 0.2% dimethicone, 0.2% oleic acid.
1) prepared by organic carrier：Weigh the DBE for accounting for organic resin and organic solvent gross mass 10%, 40% diethylene glycol
Ethyl ether acetate ester, 10% dibutyl phthalate, 25% diethylene glycol, 3% polyamide, 10% acrylic acid
Resin, 2% focus ratio are added in the double-planet power batch mixer batch mixer with water bath with thermostatic control, and adjusting bath temperature is
It 95 DEG C, mixing speed 800rpm, batch mixing 2h, crosses while hot during 200 mesh stainless steels sieve imports in turning barrel；
2) thixotropic agent activates：Polyamide wax (grain size D50 is 40-50 μm) purchased in market, bead, dimethylbenzene are added band and followed
In the sand mill of ring water-bath, the mass ratio of polyamide wax and bead is 1.2：1.0, the amount of dimethylbenzene is can soak polyamide wax
Subject to bead, grinding condition is 20 DEG C of bath temperature, grinding rate 2000rpm, 90min, after the completion of grinding, carries out ball powder
Separation, filtering, drying obtain the polyamide wax powder that grain size D50 is 4-5 μm；By polyamide wax powder and butyl acetic acid
Ester addition has in the sand mill of water bath with thermostatic control, and the mass ratio of polyamide wax powder and butyl acetate is 1：10, setting
80 DEG C, mixing speed 600rpm of temperature stirs 15min, imports in transfer container；
3) prepared by conductive silver paste：Weigh the silver powder of 70% above-mentioned preparation, the organic carrier of 29% above-mentioned preparation, 0.6%
Polyamide wax powder after activation, 0.2% dimethicone, 0.2% oleic acid are placed in mixing tank, mixed using double-planet power
Material machine is disperseed.It is rolled using three-roller after room temperature dispersion, until fineness is less than or equal to 6 μm.
Embodiment 4
A kind of conductive silver paste, composition and weight percentage are：60% silver powder, 37% organic carrier, 2% activation
Polyamide wax powder afterwards, 0.5% oleic acid, 0.5% BYK-110.
1) prepared by organic carrier：Weigh the DBE for accounting for organic resin and organic solvent gross mass 10%, 60% diethylene glycol
Ethyl ether acetate ester, 10% dibutyl phthalate, 13% Malin's acid resin, 6% focus ratio, 0.7% pine
Perfume (or spice), 0.3% organic siliconresin are added in the double-planet power batch mixer batch mixer with water bath with thermostatic control, and adjusting bath temperature is
It 60 DEG C, mixing speed 700rpm, batch mixing 2h, crosses while hot during 200 mesh stainless steels sieve imports in turning barrel；
2) thixotropic agent activates：Polyamide wax (grain size D50 is 40-50 μm) purchased in market, bead, dimethylbenzene are added band and followed
In the sand mill of ring water-bath, the mass ratio of polyamide wax and bead is 1.2：1.0, the amount of dimethylbenzene is can soak polyamide wax
Subject to bead, grinding condition is 20 DEG C of bath temperature, grinding rate 2000rpm, 90min, after the completion of grinding, carries out ball powder
Separation, filtering, drying obtain the polyamide wax powder that grain size D50 is 4-5 μm；By polyamide wax powder and butyl acetic acid
Ester addition has in the sand mill of water bath with thermostatic control, and the mass ratio of polyamide wax powder and butyl acetate is 1：10, setting
65 DEG C, mixing speed 500rpm of temperature stirs 40min, imports in transfer container；
3) prepared by conductive silver paste：Weigh the silver powder of 60% above-mentioned preparation, the organic carrier of 37% above-mentioned preparation, 2% work
Polyamide wax powder after change, 0.5% oleic acid, 0.5% BYK-110 are placed in mixing tank, using double-planet power batch mixer
Disperseed.It is rolled using three-roller after room temperature dispersion, until fineness is less than or equal to 6 μm.
Comparative example 1
1) prepared by organic resin Binder Phase：The formula of organic resin by weight is：Diethylene glycol monobutyl ether 30g, alcohol ester
12 20g, tributyl citrate 10g, phenolic resin 20g, epoxy resin 15g, acrylic resin 5g.It is weighed by recipe requirements a
Component is put into the double star action edge dispersant that water-bath jacket temperature is 90 DEG C and is sufficiently mixed, and incorporation time for 24 hours, is cooled to
Room temperature obtains organic resin Binder Phase.
2) prepared by organic carrier：The formulation by weight group of organic carrier becomes：Ethyl cellulose 5g, terpinol 60g, diethyl two
Alcohol monobutyl ether acetate ester 30g, lecithin 1g, Span -852g, modified hydrogenated castor oil 2g.Each component is weighed by recipe requirements, is put
Entering to have and be sufficiently mixed in the double star action edge dispersant that water-bath jacket temperature is 60 DEG C, incorporation time is for 24 hours, to be cooled to room temperature,
Obtain organic carrier.
3) prepared by conductive silver paste：The formulation by weight group of electrocondution slurry becomes：Flake silver powder 72g, organic resin Binder Phase
10g, organic carrier 15g, butyl titanate 0.5g, dimethicone 1.5g, BYK-1101g.
Each component is weighed by recipe requirements, is put into the double star action edge dispersant that water-bath jacket temperature is 25 DEG C fully
Mixing, then takes out and is placed on three-roll grinder rolling repeatedly, forms the uniform conductive silver paste that fineness is less than or equal to 6 μm.
1 gained conductive silver paste of embodiment 1-4 and comparative example, tests its thixotropic index.Thixotropic index be 10rpm viscosity numbers/
50rpm viscosity numbers, the test method of conductive silver paste viscosity are to be measured with viscosity apparatus, and condition is Brookfiled SC4-
1410rpm, 25 DEG C.
To embodiment 1-4 and 1 gained conductive silver paste of comparative example with 325 mesh stainless steel cloths be printed on PET-ITO films and
On Glass-ITO films, 10-15 μm of thicknesses of layers is printed, through 45-60min or 150 DEG C of solidification 30min of 130 DEG C of solidifications, cured film
7-12 μm of layer thickness tests the performance of the conductive silver paste cured film.
Embodiment 1-4 and 1 gained conductive silver paste items test result of comparative example are shown in Table 1.
The viscosity of 1 silver paste of table, the performance of thixotropic index and cured film
The sheet resistance of silver paste cured film is measured to be carried out according to the regulation of GB/T 17473.3, and printed pattern 0.6mm × 60mm is surveyed
It converts after solidification film resistance and thickness；The adhesive force of silver paste cured film uses hundred lattice methods of testing, after cross-cut tester scribing line, 3M#600 glue
Band peel test.
As can be seen from the above table, the adhesive force of 1 gained silver paste of embodiment 1-4 and comparative example is 5B, illustrates that gained is conductive
Silver paste all has excellent adhesive ability on PET-ITO films and Glass-ITO films, and conductive silver paste cures obtained by embodiment 1-4
The sheet resistance of film is less than the sheet resistance of 1 gained conductive silver paste cured film of comparative example, illustrates leading for the conductive silver paste obtained using this method
It is electrically more preferable, it is smaller on the influence of the electric conductivity of silver paste that polyamide wax is added.The thixotropic index of conductive silver paste obtained by embodiment 1-4
More than the thixotropic index of 1 gained conductive silver paste of comparative example, illustrate that the thixotropic property of the conductive silver paste obtained using this method is more preferable,
Because thixotropic agent and organic resin are separately disperseed in organic solvent, thixotropic agent dispersion can be avoided improper and lost by the present invention
Activity, to improve the thixotropic index of conductive silver paste.
Those of ordinary skills in the art should understand that：The discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under the thinking of the present invention, above example
Or can also be combined between the technical characteristic in different embodiments, and there are different aspects present invention as described above
Many other variations, in order to it is concise they do not provided in details.Therefore, all within the spirits and principles of the present invention,
Any omission, modification, equivalent replacement, improvement for being made etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of conductive silver paste, which is characterized in that including following component and respective mass percentage：Silver powder 45-80%, it is organic
Carrier 15-50%, the thixotropic agent 0.6-3.5% after activation and auxiliary agent 0.4-2.0%.
2. conductive silver paste as described in claim 1, which is characterized in that the thixotropic agent after the activation is polyamide wax powder.
3. conductive silver paste as described in claim 1, which is characterized in that the organic carrier includes following component and respective quality
Percentage composition：Organic resin 10-20%, organic solvent 80-90%；Organic solvent is selected from diethylene glycol, dibasic ester, diethyl two
It is one or more in alcohol ethyl ether acetate ester, dibutyl phthalate.
4. conductive silver paste as claimed in claim 1 or 2, which is characterized in that the organic resin be selected from rosin, newtrex,
It is a variety of in focus ratio, polyamide, acrylic resin, Malin's acid resin, organic siliconresin.
5. conductive silver paste as claimed in claim 1 or 2, which is characterized in that the silver powder is flake silver powder.
6. conductive silver paste as claimed in claim 1 or 2, which is characterized in that the grain size D50 of the silver powder is 1.4-1.6 μm, is shaken
Real density is 3.4-3.8g/cm3。
7. a kind of preparation method of conductive silver paste, which is characterized in that include the following steps：
1) prepared by organic carrier：Organic resin 10-20% is weighed by mass percentage, organic solvent 80-90% is at 60-95 DEG C
Under stir and evenly mix；
2) thixotropic agent activates：Polyamide wax and dimethylbenzene are ground in water-bath grinder, obtained polyamide wax powder and diethyl
Glycol monobutyl ether acetate is dispersed with stirring uniformly at 55-80 DEG C；
3) prepared by conductive silver paste：Silver powder 45-80%, organic carrier 15-50%, the polyamides after activation are weighed by mass percentage
Amine wax powder 0.6-3.5% and auxiliary agent 0.4-2.0% are dispersed with stirring, and roll-in to silver paste reaches fineness requirement.
8. the preparation method of conductive silver paste as claimed in claim 7, which is characterized in that polyamide wax powder described in step 2)
Grain size D50 is 4-5 μm.
9. the preparation method of conductive silver paste as claimed in claim 7, which is characterized in that mixing speed described in step 2) is
500-600rpm, mixing time 15-40min.
10. the preparation method of conductive silver paste as claimed in claim 7, which is characterized in that the fineness of silver paste described in step 3)
It is required that for no more than 6 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810350795.7A CN108735337A (en) | 2018-04-18 | 2018-04-18 | A kind of conductive silver paste and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810350795.7A CN108735337A (en) | 2018-04-18 | 2018-04-18 | A kind of conductive silver paste and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108735337A true CN108735337A (en) | 2018-11-02 |
Family
ID=63939038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810350795.7A Pending CN108735337A (en) | 2018-04-18 | 2018-04-18 | A kind of conductive silver paste and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108735337A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109686473A (en) * | 2019-01-29 | 2019-04-26 | 大连海外华昇电子科技有限公司 | A kind of multilayer ceramic capacitor is starched and is applied with soft termination electrode copper |
| CN111356252A (en) * | 2020-04-03 | 2020-06-30 | 苏州星烁纳米科技有限公司 | Electrothermal film, conductive silver paste and preparation method of electrothermal film |
| CN112825276A (en) * | 2019-11-21 | 2021-05-21 | 江西佳银科技有限公司 | High-performance solar front conductive silver paste and preparation method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002150837A (en) * | 2000-11-14 | 2002-05-24 | Fujikura Kasei Co Ltd | Conductive paste |
| CN102360586A (en) * | 2011-09-28 | 2012-02-22 | 邓水斌 | Conductive silver paste with low resistance used for touch screen and preparation method thereof |
| CN103094662A (en) * | 2013-01-21 | 2013-05-08 | 东莞市智源电子科技有限公司 | Low-temperature solidifying environment-friendly conductive silver paste and preparation method thereof |
| CN103400634A (en) * | 2013-07-22 | 2013-11-20 | 上海玻纳电子科技有限公司 | Conductive silver paste used for crystalline silicon solar cell front electrode and preparation method thereof |
| CN103435854A (en) * | 2013-08-29 | 2013-12-11 | 中国人民解放军国防科学技术大学 | Organic carrier for crystalline silicon solar cell electrode slurry and preparation method thereof |
| CN104575686A (en) * | 2015-01-21 | 2015-04-29 | 华南理工大学 | Low cost copper-doped conductive silver paste and preparation method thereof |
| CN105513668A (en) * | 2016-01-25 | 2016-04-20 | 深圳市思迈科新材料有限公司 | Conductive silver paste for nano-silver film low-temperature setting and preparation method thereof |
| CN106158065A (en) * | 2015-04-17 | 2016-11-23 | 北京中科纳通电子技术有限公司 | A kind of anti-silver of handset touch panel special low temperature solidification migrates laser-induced thermal etching conductive silver paste and preparation method thereof |
| CN106158068A (en) * | 2016-07-05 | 2016-11-23 | 湖南省国银新材料有限公司 | conductive silver paste and preparation method thereof |
| CN106816199A (en) * | 2017-01-23 | 2017-06-09 | 湖南省国银新材料有限公司 | A kind of high square resistance crystal silicon solar energy battery front electrode silver slurry and preparation method thereof |
-
2018
- 2018-04-18 CN CN201810350795.7A patent/CN108735337A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002150837A (en) * | 2000-11-14 | 2002-05-24 | Fujikura Kasei Co Ltd | Conductive paste |
| CN102360586A (en) * | 2011-09-28 | 2012-02-22 | 邓水斌 | Conductive silver paste with low resistance used for touch screen and preparation method thereof |
| CN103094662A (en) * | 2013-01-21 | 2013-05-08 | 东莞市智源电子科技有限公司 | Low-temperature solidifying environment-friendly conductive silver paste and preparation method thereof |
| CN103400634A (en) * | 2013-07-22 | 2013-11-20 | 上海玻纳电子科技有限公司 | Conductive silver paste used for crystalline silicon solar cell front electrode and preparation method thereof |
| CN103435854A (en) * | 2013-08-29 | 2013-12-11 | 中国人民解放军国防科学技术大学 | Organic carrier for crystalline silicon solar cell electrode slurry and preparation method thereof |
| CN104575686A (en) * | 2015-01-21 | 2015-04-29 | 华南理工大学 | Low cost copper-doped conductive silver paste and preparation method thereof |
| CN106158065A (en) * | 2015-04-17 | 2016-11-23 | 北京中科纳通电子技术有限公司 | A kind of anti-silver of handset touch panel special low temperature solidification migrates laser-induced thermal etching conductive silver paste and preparation method thereof |
| CN105513668A (en) * | 2016-01-25 | 2016-04-20 | 深圳市思迈科新材料有限公司 | Conductive silver paste for nano-silver film low-temperature setting and preparation method thereof |
| CN106158068A (en) * | 2016-07-05 | 2016-11-23 | 湖南省国银新材料有限公司 | conductive silver paste and preparation method thereof |
| CN106816199A (en) * | 2017-01-23 | 2017-06-09 | 湖南省国银新材料有限公司 | A kind of high square resistance crystal silicon solar energy battery front electrode silver slurry and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109686473A (en) * | 2019-01-29 | 2019-04-26 | 大连海外华昇电子科技有限公司 | A kind of multilayer ceramic capacitor is starched and is applied with soft termination electrode copper |
| CN112825276A (en) * | 2019-11-21 | 2021-05-21 | 江西佳银科技有限公司 | High-performance solar front conductive silver paste and preparation method thereof |
| CN112825276B (en) * | 2019-11-21 | 2022-12-23 | 江西佳银科技有限公司 | High-performance solar front conductive silver paste and preparation method thereof |
| CN111356252A (en) * | 2020-04-03 | 2020-06-30 | 苏州星烁纳米科技有限公司 | Electrothermal film, conductive silver paste and preparation method of electrothermal film |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106862588B (en) | A kind of preparation method of laser engraving touch screen silver paste super fine silver powder | |
| CN108735337A (en) | A kind of conductive silver paste and preparation method thereof | |
| CN105772743B (en) | A kind of preparation method of flake silver powder applied to touch screen | |
| CN103400634B (en) | A kind of crystal silicon solar energy battery front electrode conductive silver paste and preparation method thereof | |
| CN102097183B (en) | Process for preparing conductive slurry for crystalline silicon solar cell front electrode | |
| CN105504999A (en) | Double-component conductive ink and preparing method thereof | |
| CN102360586B (en) | Conductive silver paste with low resistance used for touch screen and preparation method thereof | |
| CN103295659B (en) | Conductive paste for solar cell and preparation method thereof | |
| CN104308183A (en) | Preparation method for flake silver powder for electronic paste | |
| CN104153222A (en) | Direct injection ink-jet printing dispersion ink and preparation method thereof | |
| CN106158068A (en) | conductive silver paste and preparation method thereof | |
| CN106251931A (en) | Low-temperature cured conductive silver slurry and preparation method thereof | |
| CN104575686A (en) | Low cost copper-doped conductive silver paste and preparation method thereof | |
| CN103094662B (en) | Low-temperature solidifying environment-friendly conductive silver paste and preparation method thereof | |
| CN105414560A (en) | Method for preparing small-grain-size flake silver powder for high-resolution display screen paste | |
| CN106887271A (en) | Modified lead-free silver slurry of a kind of Graphene and preparation method thereof | |
| CN114054769A (en) | Silver micro powder and preparation method and application thereof | |
| CN105938732A (en) | Thermal curing conductive slurry and preparation method thereof | |
| CN101407628B (en) | Method for producing water-soluble PTC functional conductive carbon paste | |
| CN105062211A (en) | Halogen-free mirror ink and preparation method thereof | |
| CN108766696A (en) | A kind of slice type piezoresistor palladium-silver slurry | |
| CN102286223A (en) | Pigment composition for drawing of children and preparation method thereof | |
| CN103627254B (en) | Ceramic ink-jet printing used yellow glaze printing ink for ceramic ink-jet printing and preparation method thereof | |
| CN105817647A (en) | Preparation method for flake sliver powder used for solar rear silver paste | |
| CN105513672A (en) | Preparation method for flaky rhombic silver powder slurry on back of solar cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181102 |