Glass powder, preparation method of glass powder, conductive silver slurry and preparation method of conductive silver slurry

Abstract

The invention provides glass powder which contains 5-30% of sodium stannate, 1-20% of sodium metaborate, 1-20% of sodium silicate and 40-70% of bismuth telluride by mass. The glass powder overcomes the traditional shortcomings, does not require processes such as high temperature melting and quenching and can be obtained by simply directly mixing components evenly. A preparation method of the glass powder is simple, and the glass powder is excellent in performance. Conductive silver slurry is further provided. The conductive silver slurry contains 65-90% of the glass powder, 1-10% of sliver powder and 5-30% of organic carrier by mass.

Description

technical field [0001] The invention belongs to the field of conductive paste, and in particular relates to a glass powder, a preparation method thereof, and a conductive paste prepared by using the glass powder. Background technique [0002] The front and back conductive pastes for solar cells are generally prepared from raw materials such as metal powder, glass powder and organic vehicle. Taking the conductive silver paste as an example, the glass powder is melted at high temperature, and the sunlight anti-reflection layer (usually SiNx or TiO) on the silicon surface is 2 Film) melts, so that the silver in the paste can contact the silicon surface, and the silver powder can form Ag / Si conductive islands with silicon at high temperature under the action of glass frit, and the silver wire and silicon can form a good ohmic contact; at the same time , The glass adhesive attaches the silver powder to the surface of the silicon wafer, connects the conductive islands together, a...

AI Technical Summary

Problems solved by technology

[0011] The present invention provides a glass powder with simple preparation method and superior performance in order to solve the problems of cumbersome steps, high temperature danger, time-consuming and labor-consuming preparation method of glass powder in the prior art.