Micro-bead glass for conductive silver paste and preparation method of micro-bead glass

Abstract

The invention discloses micro-bead glass for conductive silver paste and a preparation method of the micro-bead glass. The micro-bead glass is composed of the following components in parts by weight:10-50 parts of tellurium dioxide, 15-70 parts of bismuth oxide, 2-10 parts of zinc oxide, 1-15 parts of molybdenum oxide, 5-20 parts of lithium oxide, 0.3-5 parts of magnesium oxide, 0.2-5 parts of aluminum oxide, 0.3-5 parts of boric acid and 0.2-2 parts of potassium oxide. The particle size D50 of glass micro-bead powder is 1-2 microns; the glass micro-bead powder is fed into a mixed solution formed by terpilenol, butyl carbitol acetate, oleic acid and polyvinylpyrrolidone; and stirring is carried out for 3-6 hours under a heat preservation condition at 80 DEG C, so that the spherical glassbeads with an organic coating layer is obtained. According to the micro-bead glass disclosed by the invention, lubricity of a slurry system is improved, ink permeability is increased, a problem of material shortage in fine grid lines is avoided, molten glass cannot flow easily when the slurry is sintered, and a fine line shape is kept.

Description

technical field [0001] The invention relates to a microbead glass for conductive silver paste, which belongs to the technical field of solar cell functional materials. Background technique [0002] Photovoltaic cells, as an important branch of new clean energy, have achieved rapid development in recent years. Photovoltaic cell technology is also changing with each passing day. The entire industry chain is actively improving the conversion efficiency of photovoltaic cells and reducing costs through technological innovation, striving to achieve grid parity and replace traditional high pollution. energy. [0003] Crystalline silicon photovoltaic cells are currently the most important type of photovoltaic cells, accounting for more than 90%. The principle of photoelectric conversion is: boron-doped P-type silicon and phosphorus-doped N-type silicon form a PN junction. The junction then absorbs photon energy to excite electron transitions, forming electron-hole pairs, and thus g...

AI Technical Summary

Problems solved by technology

If the screen opening is narrow, the ink permeability of the paste printing is poor, and it is easy to cause a local shortage of material in the fine grid after printing, thereby increasing the series resistance of the battery and affecting the photoelectric conversion efficiency of the solar cell.

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