CN114171238B - Low-resistance silver paste for automobile glass and preparation method thereof - Google Patents
Low-resistance silver paste for automobile glass and preparation method thereof Download PDFInfo
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 129
- 239000011521 glass Substances 0.000 title claims abstract description 85
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 72
- 239000004332 silver Substances 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 37
- 229910052751 metal Inorganic materials 0.000 claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 32
- 239000003960 organic solvent Substances 0.000 claims abstract description 25
- 239000002952 polymeric resin Substances 0.000 claims abstract description 25
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 239000002002 slurry Substances 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000005303 weighing Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 claims description 11
- 239000004925 Acrylic resin Substances 0.000 claims description 11
- 229920000178 Acrylic resin Polymers 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 238000005245 sintering Methods 0.000 claims description 9
- 239000001856 Ethyl cellulose Substances 0.000 claims description 8
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 claims description 8
- 229920001249 ethyl cellulose Polymers 0.000 claims description 8
- 235000019325 ethyl cellulose Nutrition 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 8
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 claims description 7
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 229940116411 terpineol Drugs 0.000 claims description 7
- 229920000896 Ethulose Polymers 0.000 claims description 5
- 239000001859 Ethyl hydroxyethyl cellulose Substances 0.000 claims description 5
- 239000000020 Nitrocellulose Substances 0.000 claims description 5
- 235000019326 ethyl hydroxyethyl cellulose Nutrition 0.000 claims description 5
- 229920001220 nitrocellulos Polymers 0.000 claims description 5
- WAEVWDZKMBQDEJ-UHFFFAOYSA-N 2-[2-(2-methoxypropoxy)propoxy]propan-1-ol Chemical compound COC(C)COC(C)COC(C)CO WAEVWDZKMBQDEJ-UHFFFAOYSA-N 0.000 claims description 4
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 claims description 2
- CRWNQZTZTZWPOF-UHFFFAOYSA-N 2-methyl-4-phenylpyridine Chemical compound C1=NC(C)=CC(C=2C=CC=CC=2)=C1 CRWNQZTZTZWPOF-UHFFFAOYSA-N 0.000 claims description 2
- QCAHUFWKIQLBNB-UHFFFAOYSA-N 3-(3-methoxypropoxy)propan-1-ol Chemical compound COCCCOCCCO QCAHUFWKIQLBNB-UHFFFAOYSA-N 0.000 claims description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 2
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 241000779819 Syncarpia glomulifera Species 0.000 claims description 2
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000001739 pinus spp. Substances 0.000 claims description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 2
- 229940036248 turpentine Drugs 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims description 2
- 238000010792 warming Methods 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 7
- 239000002253 acid Substances 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 description 8
- 239000002270 dispersing agent Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000006259 organic additive Substances 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000013003 hot bending Methods 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 229940023462 paste product Drugs 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010257 thawing Methods 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
- H01B1/14—Conductive material dispersed in non-conductive inorganic material
- H01B1/16—Conductive material dispersed in non-conductive inorganic 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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Conductive Materials (AREA)
Abstract
The invention relates to low-resistance silver paste for automobile glass and a preparation method thereof, wherein the silver paste comprises the following components in parts by weight: 85-88 parts of metal silver powder, 3-5 parts of superfine glass powder, 1-2 parts of high polymer resin and 6-10 parts of organic solvent, and the low-resistance silver paste for automobile glass is prepared through the steps of material preparation, carrier preparation, silver paste production and the like. Compared with the prior art, the silver paste has the advantages of low resistance, good acid resistance, high wear resistance and welding strength, good matching property with automobile glass ink and the like.
Description
Technical Field
The invention relates to the technical field of automobile glass silver paste, in particular to low-resistance silver paste for automobile glass and a preparation method thereof.
Background
The development of new energy automobiles is a necessary way for China to go from the automobile country to the automobile country, and is a strategic measure for coping with climate change and promoting green development. The back-end double-layer glass required by the new energy automobile is generally provided with a defogging frost heating wire, the heating wire is used for printing conductive silver paste on the surfaces of the automobile glass and the black glaze generally through a screen printing technology, and the conductive silver paste is attached to the surfaces of the new energy automobile glass and the black glaze through high-temperature treatment of a hot bending furnace at 650-750 ℃ for 7-8min to form a conductive silver layer. The resistance of the heating wire after sintering is generally 0.5-1.2 omega, the internal power supply is connected to the silver surfaces at the two sides of the glass of the new energy automobile in a lead-free solder tongue piece mode, and after 12-13V of voltage is applied, the whole silver heating wire starts to heat, and the temperature is heated to 60-80 ℃, so that the demisting and defrosting effects are achieved.
At present, all the conductive silver paste for the glass of the new energy automobile is imported silver paste, such as Zhuang Xinmo Feng, american happiness and the like foreign products, mainly including expensive and high-cost products, and the like, and the low-resistance conductive silver paste product for the lead-free solder of the domestic technology is urgently required to be developed.
Chinese patent CN101613186a discloses a leadless silver paste for high temperature sintering passenger car glass heating wire and its preparation method, the leadless silver paste comprises the following components (weight): 50% -85% of silver powder; 3% -7% of lead-free silver glass powder; 3% -12% of high polymer adhesive; 7% -23% of organic solvent; 1% -5% of superfine metal compound; and 0.5% -3% of additive, and mixing, dissolving, grinding and filtering the components to obtain the leadless silver paste for the high-temperature sintered bus glass heating wire. Chinese patent CN105761777a discloses a fine line silver paste for automotive glass and its preparation method, the raw materials are as follows: 60-80% of metal silver powder; 3-7% of glass powder; 1-8% of high polymer resin; 1-3% of organic additive; the fine wire silver paste for the automobile glass is prepared by the steps of proportioning, preparing a carrier, preparing silver paste, producing the silver paste and the like, wherein the organic solvent is 10-25%. Chinese patent CN109785991a discloses an antioxidation silver paste for passenger car front windshield and its preparation method, the raw materials are as follows: 60-80% of metal silver powder; 3-6% of glass powder; 2-8% of high polymer resin; 0.5 to 1.5 percent of organic additive; 0.5 to 4.5 percent of inorganic additive; 10-30% of organic solvent, and preparing antioxidant silver paste for front windshield of a passenger car through the steps of material preparation, carrier preparation, silver paste production and the like. Although the silver paste can be used for automobile glass, the resistance of the silver paste is still high.
Disclosure of Invention
The invention aims to provide low-resistance silver paste for automobile glass and a preparation method thereof, and the resistance of the silver paste is reduced.
The aim of the invention can be achieved by the following technical scheme: the low-resistance silver paste for the automobile glass comprises the following components in parts by weight: 85-88 parts of metal silver powder, 3-5 parts of superfine glass powder, 1-2 parts of high polymer resin and 6-10 parts of organic solvent.
Preferably, the metal silver powder is spherical silver powder, the particle size of the spherical silver powder is 1.0-2.0 mu m, the tap density is 5.5-6.5g/ml, and the apparent density is 2.5-3.5g/ml.
Further preferably, the specific surface area of the spherical silver powder is 0.5 to 0.8m 2/g.
Preferably, the superfine glass powder is lead-free glass powder, the grain diameter is 0.5-2 mu m, the sintering temperature is 650-750 ℃, and the superfine glass powder comprises the following components in parts by weight: 50-70 parts of Bi 2O3, 10-30 parts of B 2O3, 5-15 parts of ZnO, 3-10 parts of SiO 2, 3-10 parts of Sb 2O3, 0-3 parts of Al 2O3 and 0-3 parts of Na 2 O.
Preferably, the polymer resin is one or more of acrylic resin, ethyl cellulose, nitrocellulose, ethyl hydroxyethyl cellulose and wood rosin.
Further preferably, the polymer resin is an acrylic resin.
Preferably, the organic solvent is one or a mixture of more of terpineol, turpentine, diethylene glycol butyl ether, diethylene glycol dibutyl ether, butyl carbitol acetate, dipropylene glycol monomethyl ether and tripropylene glycol monomethyl ether.
Further preferably, the organic solvent is diethylene glycol butyl ether.
The preparation method of the low-resistance silver paste for the automobile glass comprises the following steps of:
(1) Preparing an organic carrier: weighing high polymer resin and organic solvent, heating the high polymer resin and the organic solvent, and filtering to remove impurities after the high polymer resin is completely dissolved to obtain an organic carrier;
(2) Preparing conductive silver paste: weighing metal silver powder and superfine glass powder, mixing with an organic carrier, and then dispersing at a high speed to obtain uniform slurry;
(3) Production of conductive silver paste: grinding the slurry in a three-roller mill, and controlling the fineness of the silver slurry to be below 12 mu m and the viscosity to be 20-30 Pa.S through fine adjustment of rollers to obtain the low-resistance silver slurry for the automobile glass.
Preferably, the heating and temperature raising process in the step (1) is to heat to 80 ℃ and keep the temperature constant, and the filtering and impurity removing process is carried out by adopting 300-400 mesh fabrics.
Preferably, the mixing process of the metal silver powder, the superfine glass powder and the organic carrier in the step (1) is carried out in a mixer, and the high-speed dispersing process is carried out in a high-speed dispersing machine, wherein the dispersing speed of the high-speed dispersing machine is 65-70r/min.
Compared with the prior art, the invention has the following advantages:
1. The silver paste has the advantages of low resistance, good acid resistance, higher wear resistance and welding strength, good matching property with automobile glass ink and the like;
2. According to the invention, through the arrangement of the metal silver powder with high tap density and low specific surface, the technical threshold of low resistance for automobile glass is broken through, the silver content of the silver paste is improved, the resistance of the silver paste is reduced, and the weldability of the silver paste is improved;
3. According to the invention, through selecting and matching the superfine glass powder, the adhesive force between the silver paste and the glass is improved;
4. the invention further improves the solid content of the silver paste by adopting the low molecular weight resin and the low viscosity organic solvent, reduces the low viscosity of the silver paste and is beneficial to the screen printing process;
5. the invention can realize the production and application of 88 percent high-silver-content low-resistance silver paste;
6. the raw materials used in the invention can meet the technical requirements of environmental protection at home and abroad.
Detailed Description
The following examples of the present invention are described in detail, and are given by way of illustration of the present invention, but the scope of the present invention is not limited to the following examples.
Example 1
The low-resistance silver paste for the automobile glass comprises the following raw materials in parts by weight: 88 parts of metal silver powder, 4 parts of superfine glass powder, 1 part of high polymer resin and 7 parts of organic solvent.
Wherein, the grain diameter of the metal silver powder is 1.76 mu m, the tap density is 5.88g/ml, the apparent density is 2.71g/ml, and the specific surface area is 0.55m 2/g; the superfine glass powder comprises the following components in parts by weight: bi 2O3 parts, B 2O3 parts, znO 8 parts, siO 2 parts, sb 2O3 parts, al 2O3 parts and Na 2 O1 parts, wherein the average particle size is 1.53 mu m, and the sintering temperature is 700 ℃; the high polymer resin is acrylic resin; the organic solvent is diethylene glycol butyl ether.
The preparation method of the low-resistance silver paste for the automobile glass in the embodiment specifically comprises the following steps:
(1) 1kg of a material is prepared according to the following components and mass:
(2) Preparing an organic carrier: weighing acrylic resin and diethylene glycol butyl ether, heating to 80 ℃ and keeping the temperature constant, and filtering and removing impurities on 400-mesh screen cloth after the acrylic resin is completely dissolved to obtain an organic carrier;
(3) Preparing conductive silver paste: weighing metal silver powder and superfine glass powder, fully mixing the metal silver powder and the superfine glass powder with an organic carrier in a mixer, and then dispersing at a high speed by using a high-speed dispersing agent to obtain uniform slurry;
(4) Production of conductive silver paste: grinding the slurry in a three-roller mill, and fine-adjusting the roller to ensure that the fineness of the silver slurry is 10 mu m and the viscosity is 28 Pa.S, thereby obtaining the low-resistance silver slurry for the automobile glass.
Example 2
The low-resistance silver paste for the automobile glass comprises the following raw materials in parts by weight: 85 parts of metal silver powder, 5 parts of superfine glass powder, 2 parts of high polymer resin and 8 parts of organic solvent.
Wherein, the grain diameter of the metal silver powder is 1.87 mu m, the tap density is 6.03g/ml, the apparent density is 2.64g/ml, and the specific surface area is 0.64m 2/g; the superfine glass powder comprises the following components in parts by weight: bi 2O3 parts, B 2O3 parts, znO 10 parts, siO 2 parts, sb 2O3 parts, al 2O3 parts and Na 2 O1 parts, wherein the average particle size is 1.82 mu m, and the sintering temperature is 720 ℃; the high polymer resin is ethyl cellulose; the organic solvent is terpineol and diethylene glycol butyl ether, and the weight ratio of the terpineol to the diethylene glycol butyl ether is 1:1.
The preparation method of the low-resistance silver paste for the automobile glass in the embodiment specifically comprises the following steps:
(1) 1kg of a material is prepared according to the following components and mass:
(2) Preparing an organic carrier: weighing ethyl cellulose, diethylene glycol butyl ether and terpineol, heating to 80 ℃ and keeping the temperature constant, and filtering and removing impurities on 400-mesh cloth after the ethyl cellulose is completely dissolved to obtain an organic carrier;
(3) Preparing conductive silver paste: weighing metal silver powder and superfine glass powder, fully mixing the metal silver powder and the superfine glass powder with an organic carrier in a mixer, and then dispersing at a high speed by using a high-speed dispersing agent to obtain uniform slurry;
(4) Production of conductive silver paste: grinding the slurry in a three-roller mill, and fine-adjusting the roller to ensure that the fineness of the silver slurry is 9 mu m and the viscosity is 26 Pa.S, thereby obtaining the low-resistance silver slurry for the automobile glass.
Example 3
The low-resistance silver paste for the automobile glass comprises the following raw materials in parts by weight: 87 parts of metal silver powder, 4 parts of superfine glass powder, 2 parts of high polymer resin and 7 parts of organic solvent.
Wherein, the grain diameter of the metal silver powder is 1.66 mu m, the tap density is 5.69g/ml, the apparent density is 2.56g/ml, and the specific surface area is 0.72m 2/g; the superfine glass powder comprises the following components in parts by weight: bi 2O3 parts, B 2O3 parts, znO 8 parts, siO 2 parts, sb 2O3 parts, al 2O3 parts and Na 2 O1 parts, wherein the average particle size is 1.53 mu m, and the sintering temperature is 700 ℃; the high polymer resin is acrylic resin and ethyl cellulose, and the weight ratio of the acrylic resin to the ethyl cellulose is 1:1; the organic solvent is diethylene glycol butyl ether.
The preparation method of the low-resistance silver paste for the automobile glass in the embodiment specifically comprises the following steps:
(1) 1kg of a material is prepared according to the following components and mass:
(2) Preparing an organic carrier: weighing acrylic resin, ethyl cellulose and diethylene glycol butyl ether, heating to 80 ℃ and keeping the temperature constant, and filtering and removing impurities on 400-mesh screen cloth after the acrylic resin is completely dissolved to obtain an organic carrier;
(3) Preparing conductive silver paste: weighing metal silver powder and superfine glass powder, fully mixing the metal silver powder and the superfine glass powder with an organic carrier in a mixer, and then dispersing at a high speed by using a high-speed dispersing agent to obtain uniform slurry;
(4) Production of conductive silver paste: grinding the slurry in a three-roller mill, and fine-adjusting the roller to ensure that the fineness of the silver slurry is 10 mu m and the viscosity is 25 Pa.S, thereby obtaining the low-resistance silver slurry for the automobile glass.
The results of the performance test of the silver pastes of examples 1 to 3 are shown in the following table:
Example 4
The low-resistance silver paste for the automobile glass comprises the following raw materials in parts by weight: 88 parts of metal silver powder, 3 parts of superfine glass powder, 1.5 parts of high polymer resin and 6 parts of organic solvent.
Wherein the grain diameter of the metal silver powder is 1.0 mu m; the superfine glass powder comprises the following components in parts by weight: bi 2O3 parts, B 2O3 parts, znO 5 parts, siO 2 parts, sb 2O3 parts and Na 2 O3 parts, wherein the average particle size is 0.5 mu m, and the sintering temperature is 650 ℃; the high polymer resin is nitrocellulose; the organic solvent is tripropylene glycol monomethyl ether.
The preparation method of the low-resistance silver paste for the automobile glass in the embodiment specifically comprises the following steps:
(1) 1kg of a material is prepared according to the following components and mass:
(2) Preparing an organic carrier: weighing nitrocellulose and tripropylene glycol monomethyl ether, heating to 80 ℃ and keeping the temperature constant, and filtering and removing impurities on 300-mesh screen cloth after the nitrocellulose is completely dissolved to obtain an organic carrier;
(3) Preparing conductive silver paste: weighing metal silver powder and superfine glass powder, fully mixing the metal silver powder and the superfine glass powder with an organic carrier in a mixer, and then dispersing at a high speed by using a high-speed dispersing agent to obtain uniform slurry;
(4) Production of conductive silver paste: grinding the slurry in a three-roller mill, and fine-adjusting the roller to ensure that the fineness of the silver slurry is 11 mu m and the viscosity is 30 Pa.S, thereby obtaining the low-resistance silver slurry for the automobile glass.
Example 5
The low-resistance silver paste for the automobile glass comprises the following raw materials in parts by weight: 88 parts of metal silver powder, 3 parts of superfine glass powder, 1.5 parts of high polymer resin and 10 parts of organic solvent.
Wherein the grain diameter of the metal silver powder is 2.0 mu m; the superfine glass powder comprises the following components in parts by weight: bi 2O3 parts, B 2O3 parts, znO 15 parts, siO 2 parts, sb 2O3 parts and Al 2O3 parts, wherein the average particle size is 2 mu m, and the sintering temperature is 750 ℃; the high polymer resin is ethyl hydroxyethyl cellulose; the organic solvent is terpineol.
The preparation method of the low-resistance silver paste for the automobile glass in the embodiment specifically comprises the following steps:
(1) 1kg of a material is prepared according to the following components and mass:
(2) Preparing an organic carrier: weighing ethyl hydroxyethyl cellulose and terpineol, heating to 80 ℃ and keeping the temperature constant, and filtering and removing impurities on 300-mesh screen cloth after the ethyl hydroxyethyl cellulose is completely dissolved to obtain an organic carrier;
(3) Preparing conductive silver paste: weighing metal silver powder and superfine glass powder, fully mixing the metal silver powder and the superfine glass powder with an organic carrier in a mixer, and then dispersing at a high speed by using a high-speed dispersing agent to obtain uniform slurry;
(4) Production of conductive silver paste: grinding the slurry in a three-roller mill, and fine-adjusting the roller to ensure that the fineness of the silver slurry is 12 mu m and the viscosity is 20 Pa.S, thereby obtaining the low-resistance silver slurry for the automobile glass.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (8)
1. The low-resistance silver paste for the automobile glass is characterized by comprising the following components in parts by weight: 85-88 parts of metal silver powder, 3-5 parts of superfine glass powder, 1-2 parts of high polymer resin and 6-10 parts of organic solvent;
The metal silver powder is spherical silver powder, the particle size of the spherical silver powder is 1.0-2.0 mu m, the tap density is 5.5-6.5g/ml, and the apparent density is 2.5-3.5g/ml;
The specific surface area of the spherical silver powder is 0.5-0.8 m 2/g;
the superfine glass powder is lead-free glass powder, the grain diameter is 0.5-2 mu m, the sintering temperature is 650-750 ℃, and the superfine glass powder comprises the following components in parts by weight: 50-70 parts of Bi 2O3, 10-30 parts of B 2O3, 5-15 parts of ZnO, 3-10 parts of SiO 2, 3-10 parts of Sb 2O3, 0-3 parts of Al 2O3 and 0-3 parts of Na 2 O.
2. The low-resistance silver paste for automotive glass according to claim 1, wherein the polymer resin is one or more of acrylic resin, ethylcellulose, nitrocellulose, ethylhydroxyethyl cellulose, and wood rosin.
3. The low-resistance silver paste for automotive glass according to claim 2, wherein said polymer resin is an acrylic resin.
4. The low-resistance silver paste for automobile glass according to claim 1, wherein the organic solvent is one or a mixture of a plurality of terpineol, turpentine, diethylene glycol butyl ether, diethylene glycol dibutyl ether, butyl carbitol acetate, dipropylene glycol monomethyl ether and tripropylene glycol monomethyl ether.
5. The low resistance silver paste for automotive glass according to claim 4, wherein said organic solvent is diethylene glycol butyl ether.
6. A method for preparing the low-resistance silver paste for automotive glass according to any one of claims 1 to 5, comprising the steps of:
(1) Preparing an organic carrier: weighing high polymer resin and organic solvent, heating the high polymer resin and the organic solvent, and filtering to remove impurities after the high polymer resin is completely dissolved to obtain an organic carrier;
(2) Preparing conductive silver paste: weighing metal silver powder and superfine glass powder, mixing with an organic carrier, and then dispersing at a high speed to obtain uniform slurry;
(3) Production of conductive silver paste: grinding the slurry in a three-roller mill, and controlling the fineness of the silver slurry to be below 12 mu m and the viscosity to be 20-30 Pa.S through fine adjustment of rollers to obtain the low-resistance silver slurry for the automobile glass.
7. The method of preparing low resistance silver paste for automotive glass according to claim 6, wherein the heating and warming process in step (1) is heating and warming to 80 ℃ and keeping constant temperature, and the filtering and impurity removing process is performed by using 300-400 mesh cloth.
8. The method for preparing low-resistance silver paste for automotive glass according to claim 6, wherein the mixing process of the metal silver powder, the ultrafine glass powder and the organic carrier in the step (1) is performed in a mixer, and the high-speed dispersing process is performed in a high-speed dispersing machine, wherein the dispersing speed of the high-speed dispersing machine is 65-70r/min.
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