CN107799199B - A kind of low cost low temperature sintering piezoresistor silver paste and preparation method thereof - Google Patents
A kind of low cost low temperature sintering piezoresistor silver paste and preparation method thereof Download PDFInfo
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- CN107799199B CN107799199B CN201711003354.1A CN201711003354A CN107799199B CN 107799199 B CN107799199 B CN 107799199B CN 201711003354 A CN201711003354 A CN 201711003354A CN 107799199 B CN107799199 B CN 107799199B
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 26
- 239000004332 silver Substances 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000009766 low-temperature sintering Methods 0.000 title abstract description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 38
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000002002 slurry Substances 0.000 claims abstract description 20
- 239000011521 glass Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 16
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003085 diluting agent Substances 0.000 claims abstract description 10
- 239000000654 additive Substances 0.000 claims abstract description 9
- 239000010936 titanium Substances 0.000 claims abstract description 9
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 9
- 230000000996 additive effect Effects 0.000 claims abstract description 8
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 18
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 8
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 238000005245 sintering Methods 0.000 claims description 7
- 235000010980 cellulose Nutrition 0.000 claims description 6
- 229920002678 cellulose Polymers 0.000 claims description 6
- 238000010791 quenching Methods 0.000 claims description 6
- 230000000171 quenching effect Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 238000000498 ball milling Methods 0.000 claims description 4
- 239000003960 organic solvent Substances 0.000 claims description 4
- 150000004671 saturated fatty acids Chemical class 0.000 claims description 4
- 235000003441 saturated fatty acids Nutrition 0.000 claims description 4
- 150000003384 small molecules Chemical class 0.000 claims description 4
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 claims description 2
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 2
- 239000012736 aqueous medium Substances 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 claims description 2
- 238000004090 dissolution Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000003208 petroleum Substances 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- 235000019197 fats Nutrition 0.000 claims 1
- 235000021003 saturated fats Nutrition 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Glass Compositions (AREA)
- Micromachines (AREA)
- Conductive Materials (AREA)
Abstract
A kind of low cost low temperature sintering piezoresistor silver paste and preparation method thereof, by mass fraction: micro silver powder A 30~70, micro silver powder B 20~30, micro silver powder C 5~20, glass powder 2~6, titanium valve 1~3, additive 1~3, organic diluent 1~15,1~15 precise a variety of materials of organic bond, and be stirred for uniformly；Then the characteristics of carrying out rolling, there is the service performance for improving slurry, device production cost can be greatly reduced.
Description
Technical field
The present invention relates to piezoresistor silver paste technical field, in particular to a kind of low cost low temperature is sintered varistor
Device silver paste and preparation method thereof.
Background technique
Piezoresistor is widely used, and from hand-held electronic product to industrial equipment, specification is varied with size.
With being widely used for hand-held electronic product, especially mobile phone, laptop computer, PDA, digital camera, Medical Instruments etc., electricity
The rate request of road system is higher, and requires operating voltage lower, this just proposes piezoresistor, and volume is smaller, performance
Higher requirement.Existing slurry sintering temperature is high, noble silver dosage is big.
Summary of the invention
The present invention provides a kind of low cost low temperature sintering piezoresistor silver pastes and preparation method thereof, solve sintering
The problem that temperature is high, noble silver dosage is larger has the service performance for improving slurry, device production cost can be greatly reduced
Feature.
To achieve the above object, the technical solution adopted by the present invention is that:
A kind of low cost low temperature sintering piezoresistor silver paste, in terms of mass fraction, comprising: micro silver powder A 30~70,
Micro silver powder B 20~30, micro silver powder C 5~20, glass powder 2~6, titanium valve 1~3, nickel powder 1~3, organic diluent 1~15, have
Machine adhesive 1~15.
The partial size of the micro silver powder A is 0.5~2.5 μm, and the partial size of micro silver powder B is 1.0~4.8 μm, the grain of micro silver powder C
Diameter is 0.5~2.0 μm.
The glass powder is by Bi2O3、CaO、SrO、ZnO、B2O3、SnO、P2O5、V2O5、K2O presses 40~65wt%, 6-
The ratio of 10wt%, 6~10wt%, 4~10wt%, 5~17wt%, 4-7wt%, 1~5wt%, 1~5wt%, 1~3wt%
It is sintered at 1100~1400 DEG C after mixing, water quenching, crushing, ball milling obtain.
The organic bond is in terms of mass fraction, 10~35 parts of small molecule celluloses, 2~5 parts of saturated fatty acids, 1-
5 parts of organically-modified additives, 60~90 parts of organic solvent compositions.
The organic diluent is diethylene glycol ether, butyl glycol ether, butyl carbitol, n-butanol, cyclohexanol, second
Ether, petroleum ether, butyl acetate, terebinthine several mixed liquors.
A kind of low cost low temperature sintering piezoresistor silver paste preparation method for material, including,
Step 1: the preparation of glass powder:
Powder configuration and sintering: Bi2O3、CaO、SrO、ZnO、B2O3、SnO、P2O5、V2O5、K2O presses 40~65wt%, 6-
The ratio of 10wt%, 6~10wt%, 4~10wt%, 5~17wt%, 4-7wt%, 1~5wt%, 1~5wt%, 1~3wt%
25min is sintered at 1100~1400 DEG C after mixing；
Subsequent processing: being cooled to 680 DEG C of progress water quenchings for above-mentioned mixing object, and the Primary product after water quenching is carried out
Sub-sieve is crushed to 15-25 μm of little particle with pulverizer, then according to specific requirements ball mill in aqueous medium existence condition
The lower processing for carrying out thinner grade, 3 μm of partial size <；
By above-mentioned step up to transition temperature at 345~380 DEG C, the pressure-sensitive slurry of low temperature that softening point is 400~485 DEG C
Material uses glass powder；
Step 2: the preparation of organic bond:
10~35 parts of small molecule celluloses, 2~5 parts of saturated fatty acids, 60~90 parts of organic solvent compositions；It is first anti-to glass
It answers added with solvent in kettle, temperature is controlled at 75~95 DEG C, gives certain mixing speed, is then slowly added into cellulose and is satisfied
And fatty acid, dissolve it sufficiently, dissolution time is 12~22h；
Step 3, the preparation method of slurry:
By mass fraction: micro silver powder A 30~70, micro silver powder B 20~30, micro silver powder C 5~20, glass powder 2~6, titanium
Powder 1~3, additive 1~3, organic diluent 1~15,1~15 precise a variety of materials of organic bond, and be stirred for
Uniformly；
Step 4:
By material mixed in step 3, rolling, slitting part carry out rolling on three-roller, so that mixture is in uniform cream
Shape object, obtains silver paste.
The condition of rolling is respectively on the three-roller, and condition one is that three-roller pressure is controlled in 20bar, 1. gap is
2. 1:15, gap are 1:30,3. gap is 1:10,4. gap is 1:15, and uniformly mixed material is added on three-roller and is premixed,
Time is 10min or so；
Then descend the control of three-roller pressure in 10bar in this gap, rolling 2 times；
Condition two is that three-roller pressure is controlled in 20bar, and 1. gap is 0:55,2. gap is 1:15,3. gap is 0:55,
4. gap is 0:30, rolling 2 times；
Condition three is that three-roller pressure is controlled in 20bar, and 1. gap is 0:35,2. gap is 0:30,3. gap is 0:25,
4. gap is 0:20；
The slurry form that rolling finishes is in light grey body of paste, is had preferable mobility, fineness≤10 μm, viscosity 95
±5kcps。
The partial size of the micro silver powder A is 0.8~2.5 μm, and the granularity of micro silver powder B is the granularity of 1.5~4.0 μm of micro silver powder C
It is 0.2~1.2 μm.
Further, the partial size of micro silver powder A is 1 μm, and the granularity of micro silver powder B is 2 μm, and the granularity of micro silver powder C is 1 μm.
Micro silver powder C and titanium valve addition manner are slowly added to during being in the roll milling process.
Beneficial effects of the present invention:
The glass powder of preparation has low softening point and transition temperature, and making it at a lower temperature has stronger adhesiveness；
The silver paste has preferable levelability, and good to print net performance, color is shallower, and silver-colored face is than one after being made into electrode
As slurry metallic luster it is more prominent；
This slurry changes the mismatch problem of shrinking percentage on the pressure-sensitive slurry of low temperature；By the addition of special additive,
Solve the problems, such as that the voltage drop that electrode is made is big；
It is low that electrode shows pressure sensitive voltage, the big advantage of capacity.
Specific embodiment
It elaborates below with reference to embodiment to the present invention.
Embodiment 1
The various raw material of balance precise for being 0.01g with accuracy:
Step 1:
Glass powder 30g is weighed, titanium valve 10g (being handled using front surface) is stirred for uniformly；
Step 2:
It weighs 300g micro silver powder A and 200g micro silver powder B, 50g micro silver powder C and pours into three kinds of silver powder in blender and halve
It is even；
Step 3:
Organic bond 350g, diluent 50g, additive 10g is weighed to be added in blender and obtain in step 2 jointly
Silver powder mix 30min again；
Step 4:
Three-roll grinder is started, rolling is carried out as follows:
1) in 20bar, gap condition carries out the control of three-roller pressure as follows, and uniformly mixed material is added on three-roller
Premix, time 15min；
| Gap is 1. | Gap is 2. | Gap is 3. | Gap is 4. |
| 1:15 | 1:30 | 1:10 | 1:15 |
2) for the control of three-roller pressure in 10bar, gap condition carries out rolling as follows, and rolling 2 times；
| Gap is 1. | Gap is 2. | Gap is 3. | Gap is 4. |
| 1:15 | 1:30 | 1:10 | 1:15 |
3) for the control of three-roller pressure in 20bar, gap condition carries out rolling as follows, and rolling 2 times；
| Gap is 1. | Gap is 2. | Gap is 3. | Gap is 4. |
| 0:55 | 1:05 | 0:55 | 0:30 |
4) for the control of three-roller pressure in 20bar, gap condition carries out rolling as follows, and rolling 1 time；
| Gap is 1. | Gap is 2. | Gap is 3. | Gap is 4. |
| 0:35 | 0:30 | 0:25 | 0:20 |
The slurry form that rolling finishes is in light grey body of paste, is had preferable mobility, fineness≤10 μm, viscosity is
100±5kcps。
Embodiment 2
The various raw material of balance precise for being 0.01g with accuracy:
Step 1:
Glass powder 35g is weighed, titanium valve 30g (being handled using front surface) is stirred for uniformly；
Step 2:
It weighs 400g micro silver powder A and 200g micro silver powder B, 50g micro silver powder C and pours into three kinds of silver powder in blender and halve
It is even；
Step 3:
Organic bond 300g, diluent 25g, additive 25g is weighed to be added jointly in blender and silver powder in step 2
30min is mixed again；
Step 4:
Three-roll grinder is started, rolling is carried out as follows:
1) in 20bar, gap condition carries out the control of three-roller pressure as follows, and uniformly mixed material is added on three-roller
Premix, time are 15min or so.
| Gap is 1. | Gap is 2. | Gap is 3. | Gap is 4. |
| 1:15 | 1:30 | 1:10 | 1:15 |
2) for the control of three-roller pressure in 10bar, gap condition carries out rolling as follows, and rolling 2 times.
| Gap is 1. | Gap is 2. | Gap is 3. | Gap is 4. |
| 1:15 | 1:30 | 1:10 | 1:15 |
3) for the control of three-roller pressure in 20bar, gap condition carries out rolling as follows, and rolling 2 times.
| Gap is 1. | Gap is 2. | Gap is 3. | Gap is 4. |
| 0:55 | 1:05 | 0:55 | 0:30 |
4) for the control of three-roller pressure in 20bar, gap condition carries out rolling as follows, and rolling 1 time.
| Gap is 1. | Gap is 2. | Gap is 3. | Gap is 4. |
| 0:35 | 0:30 | 0:20 | 0:25 |
The slurry form that rolling finishes is in light grey body of paste, is had preferable mobility, fineness≤10 μm, viscosity is
105±5kcps。
Embodiment 3
The various raw material of balance precise for being 0.01g with accuracy:
Step 1:
Glass powder 40g is weighed, titanium valve 15g (being handled using front surface) is stirred for uniformly；
Step 2:
It weighs 350g micro silver powder A and 200g micro silver powder B, 50g micro silver powder C and pours into three kinds of silver powder in blender and halve
It is even；
Step 3:
Organic bond 300g, diluent 35g, additive 10g is weighed to be added jointly in blender and silver powder in step 2
30min is mixed again；
Step 4:
Three-roll grinder is started, rolling is carried out as follows:
1) in 20bar, gap condition carries out the control of three-roller pressure as follows, and uniformly mixed material is added on three-roller
Premix, time are 10min or so.
| Gap is 1. | Gap is 2. | Gap is 3. | Gap is 4. |
| 1:15 | 1:30 | 1:10 | 1:15 |
2) for the control of three-roller pressure in 10bar, gap condition carries out rolling as follows, and rolling 2 times.
| Gap is 1. | Gap is 2. | Gap is 3. | Gap is 4. |
| 1:15 | 1:30 | 1:10 | 1:15 |
3) for the control of three-roller pressure in 20bar, gap condition carries out rolling as follows, and rolling 2 times.
| Gap is 1. | Gap is 2. | Gap is 3. | Gap is 4. |
| 0:55 | 1:15 | 0:55 | 0:30 |
4) for the control of three-roller pressure in 20bar, gap condition carries out rolling as follows, and rolling 1 time.
The slurry form that rolling finishes is in light grey body of paste, is had preferable mobility, fineness≤10 μm, viscosity 95
±5kcps。
After the slurry prepared is stablized 12h, the slurry is obtained after crossing 300 mesh screens, is printed simultaneously in pressure sensitive substrate
It dries at 120-150 DEG C, is sintered under 400-480 DEG C of low temperature, finally carry out performance detection.
Product and test after the dry ball milling of the glass powder prepared；
Granularity and molten state test: being 3 μm with laser particle analyzer test granularity；Powder after taking ball milling is put into aluminium oxide
The sintering experiment under different temperatures is carried out in crucible, observes its molten state (powder almost all after 480 DEG C of sintering 10min
Fusing shows smooth glass surface after cooling).
A kind of high performance pressure sensitive silver paste is invented, this silver paste sintering temperature is between 400-480 DEG C, and the silver paste can be made
It is used for substitution high-content silver paste, base metal slurry (copper slurry, aluminium paste, nickel slurry etc.) can be coated on the silver paste surface layer.
Claims (8)
1. a kind of low cost low temperature is sintered piezoresistor silver paste, which is characterized in that in terms of mass fraction, comprising: micro silver powder A
30~70, micro silver powder B 20~30, micro silver powder C 5~20, glass powder 2~6, titanium valve 1~3, nickel powder 1~3, organic diluent 1
~15, organic bond 1~15；
The glass powder is by Bi2O3、CaO、SrO、ZnO、B2O3、SnO、P2O5、V2O5、K2O presses 40~65wt%, 6-10wt%,
6~10wt%, 4~10wt%, 5~17wt%, 4-7wt%, 1~5wt%, 1~5wt%, 1~3wt% ratio mixing after
It is sintered at 1100~1400 DEG C, water quenching, crushing, ball milling obtain；
The organic bond based on mass fraction, 10~35 parts of small molecule celluloses, 2~5 parts of saturated fatty acids, 1-5 parts
Organically-modified additive, 60~90 parts of organic solvent compositions.
2. a kind of low cost low temperature according to claim 1 is sintered piezoresistor silver paste, which is characterized in that described
The partial size of micro silver powder A is 0.5~2.5 μm, and the granularity of micro silver powder B is 1.0~4.8 μm, and the granularity of micro silver powder C is 0.5~2.0 μ
m。
3. a kind of low cost low temperature according to claim 1 is sintered piezoresistor silver paste, which is characterized in that described
The partial size of micro silver powder A is 1 μm, and the granularity of micro silver powder B is 2 μm, and the granularity of micro silver powder C is 1 μm.
4. a kind of low cost low temperature according to claim 1 is sintered piezoresistor silver paste, which is characterized in that described
Organic diluent is diethylene glycol ether, butyl glycol ether, butyl carbitol, n-butanol, cyclohexanol, ether, petroleum ether, acetic acid
Butyl ester, terebinthine several mixed liquors.
5. a kind of low cost low temperature is sintered piezoresistor silver paste preparation method for material, which is characterized in that including,
Step 1: the preparation of glass powder:
Powder configuration and sintering: Bi2O3、CaO、SrO、ZnO、B2O3、SnO、P2O5、V2O5、K2O presses 40~65wt%, 6-
The ratio of 10wt%, 6~10wt%, 4~10wt%, 5~17wt%, 4-7wt%, 1~5wt%, 1~5wt%, 1~3wt%
25min is sintered at 1100~1400 DEG C after mixing；
Subsequent processing: above-mentioned mixing object is cooled to 680 DEG C of progress water quenchings, the Primary product after water quenching is divided
Sieve, 15-25 μm of little particle is crushed to pulverizer, then according to specific requirements ball mill under aqueous medium existence condition
The processing of the thinner grade of progress, 3 μm of partial size <；
By above-mentioned step up to transition temperature at 345~380 DEG C, the pressure-sensitive slurry of the low temperature that softening point is 400~485 DEG C is used
Glass powder；
Step 2: the preparation of organic bond:
10~35 parts of small molecule celluloses, 2~5 parts of saturated fatty acids, 60~90 parts of organic solvent compositions；First to glass reaction kettle
In added with solvent, temperature is controlled at 75~95 DEG C, is given certain mixing speed, is then slowly added into cellulose and saturated fat
Fat acid, dissolves it sufficiently, and dissolution time is 12~22h；
Step 3, the preparation method of slurry:
By mass fraction: micro silver powder A 30~70, micro silver powder B 20~30, micro silver powder C 5~20, glass powder 2~6, titanium valve 1~
3, additive 1~3, organic diluent 1~15,1~15 precise a variety of materials of organic bond, and be stirred for uniformly；
Step 4:
By material mixed in step 3, rolling, slitting part carry out rolling on three-roller, so that mixture is in uniform paste,
Obtain silver paste.
6. a kind of low cost low temperature according to claim 5 is sintered piezoresistor silver paste preparation method for material, feature exists
In, the condition of rolling is respectively on the three-roller, and condition one is that three-roller pressure is controlled in 20bar, 1. gap is 1:15,
2. gap is 1:30,3. gap is 1:10,4. gap is 1:15, and uniformly mixed material is added on three-roller and is premixed, the time
For 10min or so；
Then descend the control of three-roller pressure in 10bar in this gap, rolling 2 times；
Condition two is that three-roller pressure is controlled in 20bar, and 1. gap is 0:55,2. gap is 1:15,3. gap is 0:55, gap
4. for 0:30, rolling 2 times；
Condition three is that three-roller pressure is controlled in 20bar, and 1. gap is 0:35,2. gap is 0:30,3. gap is 0:25, gap
4. being 0:20；
The slurry form that rolling finishes is in light grey body of paste, is had preferable mobility, fineness≤10 μm, and viscosity is 95 ±
5kcps。
7. a kind of low cost low temperature according to claim 5 is sintered piezoresistor silver paste preparation method for material, feature exists
In the partial size of the micro silver powder A is 0.8~2.5 μm, and the granularity of micro silver powder B is that the granularity of 1.5~4.0 μm of micro silver powder C is 0.2
~1.2 μm.
8. a kind of low cost low temperature according to claim 5 is sintered piezoresistor silver paste preparation method for material, the rolling
Micro silver powder C and titanium valve addition manner are slowly added to during being in the process.
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|---|---|---|---|---|
| CN108899108A (en) * | 2018-06-06 | 2018-11-27 | 彩虹集团新能源股份有限公司 | A kind of low temperature touch screen printing silver paste and preparation method thereof |
| CN109545423A (en) * | 2018-11-01 | 2019-03-29 | 上海匡宇科技股份有限公司 | Electrode of solar battery silver paste composition |
| CN115910509A (en) * | 2022-11-11 | 2023-04-04 | 淄博中领电子有限公司 | Surface junction varistor sheet and its preparation process and electromagnetic pollution absorbing device |
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| CN102768872A (en) * | 2012-06-29 | 2012-11-07 | 彩虹集团电子股份有限公司 | Lead-free environment friendly silver paste for piezoresistor and preparation method thereof |
| CN103854718A (en) * | 2012-12-03 | 2014-06-11 | 西北稀有金属材料研究院 | Solar cell front electrode slurry material and preparation method thereof |
| CN104123977A (en) * | 2014-06-30 | 2014-10-29 | 彩虹集团电子股份有限公司 | Annular piezoresistor silver paste, preparation method and application thereof |
| CN107258002A (en) * | 2015-02-27 | 2017-10-17 | 大州电子材料 | Silver paste composition, using its formed solar cell preceding electrode and use its solar cell |
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