Multifunctional TOPCon main grid glass powder modified by electronic ceramic powder and preparation method of multifunctional TOPCon main grid glass powder

Abstract

The invention discloses multifunctional TOPCon main grid glass powder modified by electronic ceramic powder and a preparation method of the multifunctional TOPCon main grid glass powder, the multifunctional TOPCon main grid glass powder comprises a glass powder component and an electronic ceramic powder component, and the glass powder component comprises 2-10 wt% of Bi2O3, 5-15 wt% of PbO, 0-10 wt% of TeO2, 10-30 wt% of CuO, 20-30 wt% of SiO2, 10-20 wt% of MnO2, 5-15 wt% of TiO2, 5-10 wt% of B2O3, 0-10 wt% of ZnO and 1-10 wt% of MO; wherein MO is two or three of Al2O3 (aluminum oxide), MgO (magnesium oxide), CaO (calcium oxide), Li2CO3 (lithium carbonate) and Y2O3 (yttrium oxide); the electronic ceramic powder is prepared from any one or two of NaNbO3 powder, TiO2 powder and (Na < 0.5 > Bi < 0.5 >) TiO3 powder. The glass powder is heated and melted by a muffle furnace, and then is subjected to quenching, crushing and ball milling. The electronic functional ceramic powder is prepared through a high-temperature solid-phase method reaction. The multifunctional TOPCon main grid glass powder is weak in corrosivity, high in weldability and welding resistance and excellent in electrical property, and has the advantages of being simple in preparation process, small and uniform in particle size, stable in performance, good in repeatability, moderate in glass-transition temperature and softening rate, wide in application condition and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of solar cells. More specifically, the present invention relates to a multifunctional TOPCon main grid glass powder modified by electronic ceramic powder and a preparation method thereof. Background Art

[0002] With the vigorous development of the photovoltaic industry, the iterative update of photovoltaic technology is becoming increasingly rapid, and the demand for efficiency improvement and cost reduction is also becoming increasingly urgent. Photovoltaic silver paste is the core auxiliary material of photovoltaic cells, which is used to make photovoltaic cell electrodes and directly affects the photoelectric conversion efficiency of photovoltaic cells. At the same time, its cost is second only to silicon wafers, accounting for about 10% of the cost of photovoltaic cells, and it directly affects the photoelectric conversion efficiency and cost of photovoltaic cells.

[0003] The conductive silver paste is composed of three parts: silver powder, glass powder, and organic carrier. Among them, the silver powder is the decisive conductive functional component; while the glass powder, as an important binder phase in the conductive paste, can form an excellent ohmic contact between the silver electrode and the silicon substrate by etching the antireflection film and the passivation layer. At the same time, the silver electrode can also obtain a high adhesion to the silicon substrate. Therefore, the silver powder and the glass powder largely affect the photoelectric conversion efficiency and reliability of the battery.

[0004] In the TOPCon main grid silver paste, while the silver electrode leads out the current, it is mainly used to provide reliable tensile force. However, the existing main grid glass powder has high contents of elements such as Pb, Bi, and Te, usually showing a low glass transition temperature, high fluidity, and high corrosiveness. It damages the surface of the battery chip and introduces a large number of defects, resulting in a decrease in battery efficiency. Summary of the Invention

[0005] An object of the present invention is to solve at least the above problems and / or defects and provide at least the advantages described hereinafter.

[0006] A multifunctional TOPCon main grid glass powder modified by electronic ceramic powder is provided, which includes a glass powder component and an electronic ceramic powder component. The glass powder component includes: 2-10 wt% of Bi2O3, 5-20 wt% of PbO, 0-10 wt% of TeO2, 10-30 wt% of CuO, 20-30 wt% of SiO2, 5-20 wt% of MnO2, 5-15 wt% of TiO2, 5-10 wt% of B2O3, 1-10 wt% of MO; where MO is two or three of Al2O3, MgO, CaO, Li2CO3, and Y2O3;

[0007] The electronic ceramic powder component includes NaNbO3, TiO2, (Na 0.5 Bi 0.5)Any one or two of TiO3 powders.

[0008] Preferably, the firing temperature of the glass powder composition is 1100 °C to 1400 °C, the glass transition temperature is 550 to 660 °C, and the softening rate m-CTE in the glass transition temperature range is 4.5×10 -3 ~7.2×10 -3 mm / K. The conventional tensile force is 3 to 4 N.

[0009] Preferably, the electronic ceramic powder composition is prepared by high-temperature solid-phase reaction, the pre-firing temperature is 800 to 900 °C, the sintering temperature is 1150 °C to 1400 °C, and the holding time is 3 to 6 h. All the obtained electronic ceramic powder compositions are pure phases.

[0010] Preferably, the particle size distribution of the powder of the multifunctional TOPCon main grid glass powder is: MV is 0.5 to 3.0 μm, D 10 <0.2 μm, D 50 is 0.4 to 2.0 μm, D 90 is 1.8 to 7.5 μm, D 100 <10 μm.

[0011] Preferably, the preparation method of the glass powder composition includes:

[0012] S1. According to the mass fraction ratio of the glass powder composition, Bi2O3, PbO, TeO2, CuO, SiO2, MnO2, TiO2, B2O3, MO are formulated into glass raw materials according to the formula, where MO is two or three of Al2O3, MgO, CaO, Li2CO3, Y2O3;

[0013] S2. Place the crucible containing the glass raw materials in a muffle furnace and heat it at a certain heating rate to form a molten glass liquid;

[0014] S3. Take out the obtained molten glass liquid from the muffle furnace and pour it into cold water for water quenching treatment;

[0015] S4. Put the solid sample obtained by water quenching into a pulverizer for pulverization according to a certain amount, and then use pure water as the medium and add it to a ball mill tank with zirconium balls for ball milling for 4 to 6 h to obtain a glass dispersion;

[0016] S5. Put the obtained glass dispersion into an oven at 150 °C and dry it thoroughly for 12 h, then put it into a sieve shaker for sieving, and sieve it under a 300-mesh sieve to obtain glass powder with an average particle size of 0.5 to 3.0 μm, that is, the glass powder composition is obtained.

[0017] Preferably, in S2, the heating rate is 100-350 °C / h, the firing temperature is 1100 °C - 1400 °C, and the firing time is 1-2 h.

[0018] Preferably, the preparation method of the electronic ceramic powder composition includes:

[0019] S11. According to the stoichiometry in the chemical formulas of NaNbO3, TiO2, (Na 0.5 Bi 0.5 )TiO3, weigh Na2CO3, Nb2O5, TiO2, and Bi2O3 with a purity of 99.99% respectively. After mixing all the weighed raw materials evenly, put them into a nylon jar. Using zirconia balls as grinding balls and anhydrous ethanol as the ball-milling medium, mix and ball-mill for 18-24 h. Separate the zirconia balls, dry the raw material mixture at 80-100 °C for 12-24 h, grind it with a mortar, and pass through a 120-mesh sieve;

[0020] S12. Place the raw material mixture passed through a 120-mesh sieve in step S11 into an alumina crucible, compact it with an agate rod, cover it, pre-burn it, and naturally cool it to room temperature. Grind it with a mortar to obtain a pre-burned powder;

[0021] S13. Put the pre-burned powder into a nylon jar. Using zirconia balls as grinding balls and anhydrous ethanol as the ball-milling medium, mix and ball-mill for 12-24 h. Separate the zirconia balls, dry the pre-burned powder at 80-100 °C for 12-24 h, grind it with a mortar, and pass through a 180-mesh sieve;

[0022] S14. Compress the powder after secondary ball-milling in a crucible, sinter it with two-stage heating, and naturally cool it to room temperature with the furnace to prepare a powder sample.

[0023] S15. Add the obtained powder sample into a zirconia ball-milling jar, use anhydrous ethanol as the medium, ball-mill for 4-6 h, then discharge it, put it into an oven at 100-180 °C and dry it thoroughly for 24 h. Grind it with a mortar and screen it to obtain an electronic ceramic powder composition with an average particle size of 0.5-3.0 μm.

[0024] Preferably, in S12, the pre-burning temperature is 850-950 °C, and the pre-burning time is 2-5 h.

[0025] Preferably, in S14, the specific method of two-stage heating sintering includes: first heat it to 1000 °C at a rate of 10 °C / min, and then heat it to 1150-1350 °C at a heating rate of 2-5 °C / min and sinter for 2-5 h.

[0026] A preparation method of a multifunctional TOPCon main grid glass powder modified by electronic ceramic powder, comprising: mixing the glass powder components obtained by high-temperature quenching and the electronic ceramic powder components obtained by high-temperature solid-phase reaction in a mass ratio of 1:0.5-10 through ball milling to make them uniformly mixed.

[0027] The present invention has at least the following beneficial effects:

[0028] The present invention reduces the content of Pb, Bi, and Te elements in the glass powder, weakens the etching of the anti-reflection film on the silicon wafer by the glass powder. At the same time, elements with relatively high contents such as Cu, Mn, and Mg, and trace element Y are introduced, endowing the main grid electrode with high welding tensile force, and meeting the requirements of the glass powder for high efficiency of TOPCon main grid and reliable component tensile force at the same time.

[0029] Electronic ceramic powders such as NaNO3, (Na 0.5 Bi 0.5 )NbO3, TiO2, etc. have special electrical properties and are often used in photocatalysis, electrocatalysis, and as a modification layer for carrier interface transport in perovskite batteries, which can greatly improve the catalytic efficiency and battery efficiency. Similarly, the above-mentioned electronic ceramic powders are prepared by high-temperature solid-phase reaction and have high stability. When they are mixed with the glass powder in a specific ratio, relying on the fluidity of the glass powder during high-temperature sintering, they are driven to the contact interface between the crystalline silicon and the metal electrode, and can play their interface modification role, improve the carrier transport ability, and thus improve the photoelectric conversion efficiency of the crystalline silicon battery.

[0030] The glass powder modified by electronic ceramic powder obtained by the present invention has high solderability and soldering resistance, excellent electrical properties, and has the characteristics of simple preparation process, relatively fine and uniform particle size, stable performance, good repeatability, moderate glass transition temperature and softening rate, and wide application range.

[0031] Other advantages, objectives, and features of the present invention will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present invention. Description of the Drawings

[0032] Figure 1 Thermomechanical property analysis of glass powder 1 and glass powder 2 prepared in Examples 1 to 4;

[0033] Figure 2 XRD diagrams of the electronic ceramic powders prepared in Examples 1 to 4;

[0034] Figure 3 Photoluminescence test of the multifunctional TOPCon main grid glass powder modified by electronic ceramic powder prepared in Examples 1 to 4 and Comparative Examples 1-2 on the TOPCon main grid;

[0035] Figure 4 Tensile tests of the multifunctional TOPCon main grid glass powder modified by electronic ceramic powder prepared in Examples 1 to 4 at different welding temperatures on the TOPCon main grid;

[0036] Figure 5 Aging tests of the multifunctional TOPCon main grid glass powder modified by electronic ceramic powder prepared in Examples 1 to 4 at 150 °C on the TOPCon main grid. Detailed implementation mode

[0037] The following further elaborates on the present invention in conjunction with the accompanying drawings, enabling those skilled in the art to implement it with reference to the text of the specification.

[0038] It should be understood that terms such as "having", "comprising", and "including" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0039] Example 1

[0040] A preparation method of a multifunctional TOPcon main grid glass powder modified by electronic ceramic powder, comprising: mixing glass powder 1 and electronic ceramic powder NaNbO3 in a mass ratio of 1:0.5 by ball milling to prepare a multifunctional TOPCon main grid glass powder modified by electronic ceramic powder.

[0041] Among them, the preparation method of glass powder 1 includes:

[0042] S1. According to the mass fraction ratio, 10 wt% Bi2O3, 20 wt% PbO, 4 wt% TeO2, 20 wt% CuO, 20 wt% SiO2, 5 wt% MnO2, 10 wt% TiO2, 5 wt% B2O, 6 wt% MO, where MO is a mixture of Al2O3 and Y2O3 in a mass ratio of 1:2. Weigh 500 g of glass raw materials according to the formula, mix them evenly and place them in an alumina crucible;

[0043] S2. Place the crucible containing the glass powder mixture in S1 in a muffle furnace, heat it to 1300 °C at a heating rate of 350 °C / h, and fire it for 1 h to form a molten glass liquid;

[0044] S3. Take out the obtained molten glass liquid from the muffle furnace and pour it into cold water for water quenching treatment;

[0045] S4. Put a certain amount of the solid sample obtained by water quenching into a pulverizer for pulverization, and then use pure water as the medium and add it to a ball mill tank with zirconium balls for ball milling for 6 h.

[0046] S5. Put the obtained glass solution into an oven at 150 °C and dry it thoroughly for 12 h, then put it into a sieve shaker for sieving. Sieving under a 300-mesh sieve to obtain glass powder with an average particle size of 0.5 μm.

[0047] The preparation method of electronic ceramic powder NaNbO3 includes:

[0048] S11. According to the stoichiometry in the chemical formula of NaNbO3, respectively weigh Na2CO3 and Nb2O5 with a purity of 99.99%. After mixing all the weighed raw materials evenly, put them into a nylon jar. Using zirconium balls as grinding balls and anhydrous ethanol as the ball-milling medium, mix and ball-mill thoroughly for 24 h, separate the zirconium balls, dry the raw material mixture at 100 °C for 12 h, grind it with a mortar, and pass through a 120-mesh sieve;

[0049] S12. Put the raw material mixture after passing through a 120-mesh sieve into an alumina crucible, compact it with an agate rod, cover it, pre-burn at 900 °C for 4 h, naturally cool to room temperature, and grind it with a mortar to obtain pre-burned powder;

[0050] S13. Put the pre-burned powder into a nylon jar, use zirconium balls as grinding balls and anhydrous ethanol as the ball-milling medium, mix and ball-mill thoroughly for 24 h, separate the zirconium balls, dry the pre-burned powder at 100 °C for 12 h, grind it with a mortar, and pass through a 180-mesh sieve;

[0051] S14. Put the powder after secondary ball-milling into a crucible and compact it. First, heat it to 1000 °C at a heating rate of 10 °C / min, then heat it to 1300 °C at a heating rate of 5 °C / min, sinter for 5 h, and naturally cool to room temperature with the furnace to prepare electronic ceramic powder materials.

[0052] S15. Add the powder sample obtained in S14 above into a zirconium ball milling jar, use anhydrous ethanol as the medium, ball-mill for 6 h, then discharge it, put it into an oven at 150 °C and dry it thoroughly for 24 h, grind it with a mortar and sieve it to obtain electronic ceramic powder NaNbO3 with an average particle size of 0.5 μm.

[0053] Example 2

[0054] A preparation method of a multifunctional TOPcon main grid glass powder modified by electronic ceramic powder, including: Mix glass powder 1 and electronic ceramic powder (Na 0.5 Bi 0.5 )TiO3 by ball milling according to a mass ratio of 1:0.5 to prepare a multifunctional TOPCon main grid glass powder modified by electronic ceramic powder.

[0055] Among them, the preparation steps of glass powder 1 are the same as those in Example 1.

[0056] Electronic ceramic powder (Na 0.5 Bi 0.5)The preparation method of (Na

[0057] Bi)TiO3 includes: 0.5 Bi 0.5 ) According to the stoichiometry in the chemical formula of (NaBi)TiO3, weigh Na2CO3, TiO2, and B2O3 with a purity of 99.99% respectively. After mixing all the weighed raw materials evenly, put them into a nylon pot. Using zirconium balls as grinding balls and anhydrous ethanol as the ball-milling medium, mix and ball-mill thoroughly for 24 h. Separate the zirconium balls, dry the raw material mixture at 100 °C for 12 h, grind it with a mortar, and pass through a 120-mesh sieve;

[0058] S12. Place the raw material mixture after passing through the 120-mesh sieve in an alumina crucible, compact it with an agate rod, cover it, pre-burn at 900 °C for 4 h, naturally cool to room temperature, and grind it with a mortar to obtain pre-burned powder;

[0059] S13. Put the pre-burned powder into a nylon pot, use zirconium balls as grinding balls and anhydrous ethanol as the ball-milling medium, mix and ball-mill thoroughly for 24 h. Separate the zirconium balls, dry the pre-burned powder at 100 °C for 12 h, grind it with a mortar, and pass through a 180-mesh sieve;

[0060] S14. Put the powder after secondary ball-milling into a crucible and compact it. First, heat it to 1000 °C at a heating rate of 10 °C / min, then heat it to 1250 °C at a heating rate of 5 °C / min, sinter for 3 h, and naturally cool to room temperature with the furnace to prepare an electronic ceramic powder material.

[0061] S15. Add the powder sample obtained in S14 above into a zirconium ball milling pot, use anhydrous ethanol as the medium, ball-mill for 6 h, then discharge it, put it into an oven at 150 °C and dry it thoroughly for 24 h, grind it with a mortar and screen it to obtain an electronic ceramic powder (Na 0.5 Bi 0.5 )TiO3 with an average particle size of 0.5 μm.

[0062] Example 3

[0063] A preparation method of a multifunctional TOPcon main grid glass powder modified by an electronic ceramic powder includes: Mix glass powder 1 and the electronic ceramic powder TiO2 in a mass ratio of 1:0.5 by ball milling to prepare a multifunctional TOPCon main grid glass powder modified by an electronic ceramic powder.

[0064] The preparation method of glass powder 1 in this example is the same as that in Example 1.

[0065] The preparation method of the electronic ceramic powder TiO2 includes:

[0066] S11. Weigh TiO2 with a purity of 99.99% separately and put it into a nylon pot. Using zirconium balls as grinding balls and anhydrous ethanol as the ball-milling medium, mix and ball-mill for 24 h. Separate the zirconium balls, dry the raw material mixture at 100 °C for 12 h, grind it with a mortar, and pass through a 120-mesh sieve;

[0067] S12. Place the raw material mixture after passing through the 120-mesh sieve in an alumina crucible, compact it with an agate rod, cover it, pre-burn at 900 °C for 4 h, naturally cool to room temperature, and grind it with a mortar to obtain the pre-burned powder;

[0068] S13. Put the pre-burned powder into a nylon pot, use zirconium balls as grinding balls and anhydrous ethanol as the ball-milling medium, mix and ball-mill for 24 h, separate the zirconium balls, dry the pre-burned powder at 100 °C for 12 h, grind it with a mortar, and pass through a 180-mesh sieve;

[0069] S14. Put the powder after secondary ball-milling into a crucible and compact it. First, heat it to 1000 °C at a heating rate of 10 °C / min, then heat it to 1400 °C at a heating rate of 5 °C / min, sinter for 5 h, and naturally cool to room temperature with the furnace to prepare the electronic ceramic powder material.

[0070] S15. Add the powder sample obtained in S14 above into a zirconium ball milling pot, use anhydrous ethanol as the medium, ball-mill for 6 h, then discharge it, put it into an oven at 150 °C and dry it thoroughly for 24 h, grind it with a mortar and screen it to obtain the electronic ceramic powder TiO2 with an average particle size of 0.5 μm.

[0071] Example 4

[0072] A preparation method of a multifunctional TOPCon main grid glass powder modified by an electronic ceramic powder, comprising: mixing glass powder 2 and electronic ceramic powder TiO2 in a mass ratio of 1:0.5 by ball milling to prepare a multifunctional TOPCon main grid glass powder modified by an electronic ceramic powder.

[0073] In the preparation method of glass powder 2 used in this example, according to 14 wt% PbO, 5 wt% TeO2, 30 wt% CuO, 20 wt% SiO2, 5 wt% MnO2, 10 wt% ZnO, 10 wt% B2O3, 6 wt% MO, where MO is a mixture of MgO and Y2O3 in a mass ratio of 1:2. The preparation method of glass powder 2 is the same as that in Example 1.

[0074] The preparation method of the electronic ceramic powder TiO2 is the same as that in Example 3.

[0075] Comparative Example 1

[0076] This comparative example provides a TOPCon main grid glass powder and its preparation method, which have the same composition and preparation method as glass powder 1 in Example 1. The difference between this comparative example and Examples 1 - 4 is that the glass powder 1 in this comparative example is not modified with electronic ceramic powder, and there are no preparation steps S11 - S15.

[0077] Comparative Example 2

[0078] This comparative example provides a TOPCon main grid glass powder and its preparation method, which have the same composition and preparation method as glass powder 2 in Example 4. The difference between this comparative example and Examples 1 - 4 is that the glass powder 1 in this comparative example is not modified with electronic ceramic powder, and there are no preparation steps S11 - S15.

[0079] The four multifunctional TOPcon main grid glass powders prepared in Examples 1 - 4 and the TOPCon main grid glass powder in the comparative example were all configured into 200 g of main grid silver paste according to the mass ratio of silver powder, glass powder, and organic carrier of 85:1.5:13.5.

[0080] The organic carrier includes resin, organic solvent, and organic additives. Among them, the organic additives include a dispersant and a thixotropic agent; the preparation method of the organic carrier includes: mixing and stirring 45 wt% dimethyl adipate, 20 wt% diethylene glycol butyl ether, 10 wt% styrene - butadiene copolymer, 5 wt% ethyl cellulose, 5 wt% fatty alcohol cetyl ester, 3 wt% rosin modified phenolic resin, 4 wt% phenoxy resin, 5 wt% polyether fatty acid (dispersant), and 3 wt% polyacetamide wax (thixotropic agent), heating and stirring at a constant temperature of 90 °C for 3 h, dispersing at 600 rpm, and then standing and cooling to obtain the organic carrier.

[0081] After processes such as grinding and defoaming, a 24 μm opening mesh screen was selected, and the main grid silver paste was printed on the front of a 182 - type TOPCon battery by screen printing, and rapid temperature sintering was carried out under sintering conditions with a peak of 780 °C. A PL tester of model RST - PL - 300M was used to characterize the corrosion degree of the sintered electrode on the silicon wafer. A thermal mechanical analyzer TMAF003 of Netzsch, Germany was used to analyze the thermodynamic properties of the above glass powder. The battery electrodes were welded at 350 °C and 360 °C, and the battery slices welded at 360 °C were placed in an oven at 150 °C for 1 h, and then a tensile test was carried out on them using a tensile machine.

[0082] Figure 1 It shows that the glass transition points of the main grid glass powder 1 and glass powder 2 prepared in Examples 1 - 4 are between 550 °C and 660 °C, and the softening rate is 4.5×10 -3 ~7.2×10 -3 mm / K, Figure 1The solid line represents glass powder 1, and the dashed line represents glass powder 2.

[0083] Figure 2 The XRD patterns of the electronic ceramic powders NaNbO3, (Na 0.5 Bi 0.5 )TiO3, and TiO2 prepared in Examples 1 to 4 are shown.

[0084] From Figure 3 it can be seen that through solid-phase reaction, the multifunctional TOPcon main grid glass powders prepared in Examples 1 to 3 and Example 4 have shallower corrosion of the silicon wafer and more obvious gray-scale improvement compared with Comparative Example 1 and Comparative Example 2.

[0085] Figure 4 And Figure 5 shows the tensile performance of the multifunctional TOPcon main grid glass powders prepared in Examples 1 to 4, and their conventional tensile strength and aged tensile strength are superior to those of the TOPCon main grid glass powder of Comparative Example 1. Thus, it can be seen that the glass powder material obtained in the present invention has both low corrosion and high tensile strength characteristics, and excellent electrical properties, and is an alternative material for multifunctional TOPCon main grid glass powder modified by electronic ceramic powders.

[0086] The number of devices and the processing scale described here are used to simplify the description of the present invention. Applications, modifications, and variations of the present invention will be apparent to those skilled in the art.

[0087] Although the embodiments of the present invention have been disclosed above, it is not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those skilled in the art, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples here.

Claims

1. A multifunctional TOPCon main grid glass powder modified by electronic ceramic powder, characterized in that, It includes a glass powder component and an electronic ceramic powder component. The glass powder component includes: 2-10 wt% of Bi2O3, 5-20 wt% of PbO, 0-10 wt% of TeO2, 10-30 wt% of CuO, 20-30 wt% of SiO2, 5-20 wt% of MnO2, 5-15 wt% of TiO2, 5-10 wt% of B2O3, 0-10 wt% of ZnO, 1-10 wt% of MO; where MO is two or three of Al2O3, MgO, CaO, Li2CO3, Y2O3. The electronic ceramic powder composition includes any one or two of NaNbO3, TiO2, (Na 0.5 Bi 0.5 )TiO3 powder 2. The multifunctional TOPCon main grid glass powder modified by electronic ceramic powder as described in claim 1, wherein, The firing temperature of the glass powder composition is 1100°C to 1400°C, the glass transition temperature is 550 to 660°C, and the softening rate m-CTE in the glass transition temperature range is 4.5×10 -3 ~7.2×10 -3 mm / K, and the conventional tensile force is 3 to 4N.

3. The multifunctional TOPCon main grid glass powder modified by electronic ceramic powder as described in claim 1, wherein The electronic ceramic powder component is prepared by high-temperature solid-phase reaction. The pre-sintering temperature is 800-900 °C, the sintering temperature is 1150 °C - 1400 °C, and the heat preservation time is 3-6 h. All the obtained electronic ceramic powder components are pure phases.

4. The multifunctional TOPCon main grid glass powder modified by electronic ceramic powder as described in claim 1, wherein The powder particle size distribution of the multifunctional TOPCon main grid glass powder is as follows: MV is 0.5 - 3.0 μm, D 10 < 0.2 μm, D 50 is 0.4 - 2.0 μm, D 90 is 1.8 - 7.5 μm, D 100 < 10 μm.

5. The multifunctional TOPCon main grid glass powder modified by electronic ceramic powder as described in claim 1, wherein The preparation method of the glass powder component includes: S1. According to the mass fraction ratio of the glass powder component, Bi2O3, PbO, TeO2, CuO, SiO2, MnO2, TiO2, B2O3, and MO are formulated into glass raw materials according to the formula, where MO is two or three of Al2O3, MgO, CaO, Li2CO3, Y2O3. S2. Place the crucible containing the glass raw materials in a muffle furnace and heat it at a certain heating rate to form a molten glass liquid. S3. Take out the obtained molten glass liquid from the muffle furnace and pour it into cold water for water quenching treatment. S4. Put the solid sample obtained by water quenching into a crusher for crushing according to a certain amount, and then use pure water as the medium and add it to a ball mill tank with zirconium balls for ball milling for 4-6 h to obtain a glass dispersion. S5. Put the obtained glass dispersion into an oven at 150 °C and dry it thoroughly for 12 h, then put it into a sieve shaker for sieving, and sieve it under a 300-mesh sieve to obtain glass powder with an average particle size of 0.5-3.0 μm, that is, the glass powder component is obtained.

6. The multifunctional TOPCon main grid glass powder modified by electronic ceramic powder as claimed in claim 5, wherein In S2, the heating rate is 100-350 °C / h, the firing temperature is 1100 °C - 1400 °C, and the firing time is 1-2 h.

7. The multifunctional TOPCon main grid glass powder modified by electronic ceramic powder as described in claim 1, wherein, The preparation method of the electronic ceramic powder component includes: S11, according to NaNbO3, TiO2, (Na 0.5 Bi 0.5 ) The stoichiometric amount in the chemical formula of TiO3 is to weigh Na2CO3, Nb2O5, TiO2 and Bi2O3 with a purity of 99.99% respectively, mix all the weighed raw materials evenly and put them into a nylon jar, use zirconium balls as grinding balls and anhydrous ethanol as ball milling medium, mix and mill them thoroughly for 18 to 24 hours, separate the zirconium balls, dry the raw material mixture at 80 to 100°C for 12 to 24 hours, grind it with a mortar, and pass it through a 120-mesh sieve; S12. Place the raw material mixture after passing through a 120-mesh sieve in an alumina crucible, compact it with an agate rod, cover it, pre-sinter it, and naturally cool it to room temperature, then grind it with a mortar to obtain pre-sintered powder. S13. Put the pre-sintered powder into a nylon tank, use zirconium balls as grinding balls and anhydrous ethanol as the ball milling medium, mix and ball mill it fully for 12-24 h, separate the zirconium balls, dry the pre-sintered powder at 80-100 °C for 12-24 h, grind it with a mortar, and pass it through a 180-mesh sieve. S14. The powder after secondary ball milling is put into a crucible and compacted, sintered by two-stage heating, and naturally cooled to room temperature with the furnace to prepare a powder sample. S15. Add the obtained powder sample into a zirconium ball mill tank, use anhydrous ethanol as the medium, ball mill it for 4-6 h, then discharge it, put it into an oven at 100-180 °C and dry it thoroughly for 24 h, grind it with a mortar and sieve it to obtain an electronic ceramic powder component with an average particle size of 0.5-3.0 μm.

8. The multifunctional TOPCon main grid glass powder modified by electronic ceramic powder as claimed in claim 7, wherein, In S12, the pre-sintering temperature is 850-950 °C, and the pre-sintering time is 2-5 h.

9. The multifunctional TOPCon main grid glass powder modified by electronic ceramic powder as described in claim 7, characterized in that In S14, the specific method of two-stage heating and sintering includes: first heating to 1000°C at a rate of 10°C / min, and then heating to 1150 - 1350°C at a heating rate of 2 - 5°C / min and sintering for 2 - 5 hours.

10. A preparation method of a multifunctional TOPCon main grid glass powder modified by electronic ceramic powder as described in any one of claims 1-9, characterized in that, including: It is prepared by ball-milling and mixing the glass powder component obtained by high-temperature quenching and the electronic ceramic powder component obtained by high-temperature solid phase at a mass ratio of 1:0.5 - 10 until evenly mixed.

Images