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Inorganic glass powder and preparation method for same, as well as conductive paste and preparation method for same

A technology of inorganic glass powder and conductive paste, which is applied to conductive materials, circuits, electrical components and other directions dispersed in non-conductive inorganic materials, can solve the problem of low adhesion strength between film layers and silicon substrates, and achieve battery photoelectric conversion. High efficiency, good appearance and low energy consumption

Active Publication Date: 2013-07-03
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of low adhesion strength between the film layer and the silicon substrate after sintering the conductive paste for crystalline silicon solar cells, and further improve the adhesion force of the metal film layer to silicon. The present invention provides an inorganic glass Powder, its composition is MF X -Bi 2 o 3 -B 2 o 3 -SiO 2 -ZnO, when X=2, M is one or more of Be, Mg, Ca, Sr, Ba, Zn; when X=3, M is one or more of Al, Ga, In ; When X=4, M is Ti or Zr

Method used

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preparation example Construction

[0017] The present invention also provides a method for preparing inorganic glass powder, comprising the following steps: step 1, MF X 、 Bi 2 o 3 , B 2 o 3 , SiO 2 , ZnO mixed evenly, heat up, preheat and keep warm, then heat up and smelt, and water quench and filter to obtain glass beads; step 2, mix the glass beads obtained in step 1 with zirconia balls and deionized water for ball milling, filter, and dry to obtain this product. Invent the inorganic glass powder. MF X It is a metal fluoride, when X=2, M is Be, Mg, Ca, Sr, Ba, Zn metal; when X=3, M is Al, Ga, In metal; when X=4, M is Ti or Zr metal.

[0018] The above-mentioned inorganic glass powder preparation method can be specifically described as: the MF X Mix the metal fluoride powder and the above-mentioned oxide powder evenly in a certain proportion, put it into a porcelain crucible, put it into a silicon carbide rod furnace, heat it up to 500-600°C and keep it for 0.5-1h, then raise it to 1200-1300°C for mel...

Embodiment 1

[0029] Step 1, the preparation of inorganic glass powder: get the CaF of 15wt% 2 , 42wt% Bi 2 o 3 , 25wt% B 2 o 3 , 10wt% SiO 2 , 3wt% of ZnO, 3.5wt% of CaO, and 1.5wt% of MgO were mixed evenly with a V-type mixer, put into a porcelain crucible, put into a silicon carbide rod furnace, and preheated to 550°C and kept for 0.5h. Then rise to 1250°C, smelt for 0.5h, quench and filter with water, put the obtained glass beads into a ball mill tank, control the mass ratio, zirconia balls: glass beads: deionized water = 2:1:0.5, tank speed 100 rpm , ball milled for 72 hours, filtered, and dried to obtain inorganic glass powder A1 with a median particle size D50 of 1.5 μm;

[0030] Step 2, the configuration of the organic carrier: according to the mass ratio of butyl carbitol: terpineol: butyl carbitol acetate = 70:20:10, the organic solvent is mixed evenly to form the mixed solvent of the slurry. Based on the total amount of carrier, get 90wt% mixed solvent, add 8.0wt% ethyl cel...

Embodiment 2

[0034] With the 15wt% CaF in step 1 in embodiment 1 2 Change to 10wt%CaF 2 and 5wt%MgF 2 , make inorganic glass powder, all the other are identical with embodiment 1.

[0035] Finally, the solar cell conductive paste S2 is prepared.

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Abstract

The invention discloses an inorganic glass powder and a preparation method for the same, wherein the component of the inorganic glass powder is MFX-Bi2O3-B2O3-SiO2-ZnO; when X is equal to 2, M is one or more of Be, Mg, Ca, Sr, Ba and Zn; when X is equal to 3, M is one or more of Al, Ga and In; and when X is equal to 4, M is one or more of Ti or Zr. The invention further provides a conductive paste and a preparation method for the same. The inorganic glass powder provided by the invention has good wettability for a metal powder and a silicon matrix; after the conductive paste containing a small amount of the inorganic glass powder is printed onto a monocrystalline silicon solar cell or a polycrystalline silicon solar cell via a silk screen and sintered to form a film, the binding layer of silicon and conductive metals is compact and uniform, the formed aluminium film is good in adhesion force with the silicon matrix, and the formed silver film is high in welding strength with a photovoltaic welding strip and good in appearance; and moreover, the paste is low in sintering peak temperature, low in energy consumption, and high in the obtained cell photoelectric conversion efficiency.

Description

technical field [0001] The invention relates to the technical field of solar cell conductive paste, in particular to an inorganic glass powder and a preparation method thereof, as well as a crystalline silicon solar cell conductive paste containing the inorganic glass powder and a preparation method thereof. Background technique [0002] Conductive paste is one of the electronic information materials, and it is also the main auxiliary material for making crystalline silicon solar cells, which occupies a considerable proportion in the cost of crystalline silicon solar cell materials. Silicon solar cells are an inexhaustible green and renewable energy source, and the current international research is very active. The composition, production, printing and sintering process of the conductive paste all have a great influence on the performance of the solar cell. Conductive paste is generally made by mixing and grinding conductive materials, inorganic glass powder, and organic ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00C03C8/24H01B1/16H01B1/22H01B13/00
Inventor 谭伟华陈东锋姜占锋
Owner BYD CO LTD
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