Black conductive silver paste for automobile glass and preparation method thereof

By adding silver nickelite to the conductive silver paste and selecting appropriate glass powder and metal silver fine powder, the problem of poor sintering caused by heat reflected during high-temperature sintering is solved, and the effect of improving the sintering quality of automotive glass at a lower sintering temperature is achieved.

CN119889762AActive Publication Date: 2025-04-25SHANGHAI BAOYIN ELECTRONICS MATERIALS CO LTD
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Patent Information

Application Number
CN202411986954.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-04-25
Estimated Expiration
2044-12-31

AI Technical Summary

Technical Problem

During the high-temperature sintering process of existing conductive silver paste, the reflected heat causes poor sintering of automobile glass, which cannot meet the sintering process requirements of thickened automobile glass.

Method used

By adding silver nickelite, selecting appropriate glass powder and metal silver powder, combining polymer resin and organic additives, a black conductive silver paste can be prepared, which can improve the sintering effect of the silver paste at a lower sintering temperature.

Benefits of technology

It is achieved to improve the sintering quality of automotive glass under 700-720°C sintering conditions, meet the process requirements of thickening automotive glass, and maintain the conductivity, welding and color requirements.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to black conductive silver paste for automobile glass and a preparation method of the black conductive silver paste. The black conductive silver paste comprises 68-88% of metal silver powder; 3-6% of silver nickelate; 3-7% of glass powder; 0.5-9% of polymer resin; 0.5-2% of an organic additive; 4.5-25% of an organic solvent; the preparation method comprises the following steps: firstly, mixing polymer resin and an organic solvent, heating, dissolving and filtering to obtain an organic carrier; adding the organic additive into the organic carrier, mixing, adding the metal silver powder, the silver nickelate and the glass powder into a mixer, and uniformly mixing and dispersing to obtain uniform black paste; and finally, the black paste is ground in a three-roller mill, the fineness of the black silver paste is controlled to be 15 microns or below, the viscosity of the black silver paste is 20-30 Pa.S, and the black conductive silver paste is obtained. Compared with the prior art, the conductive silver paste provided by the invention not only can meet the sintering process of the existing thickened automobile glass, has good matching property with black glaze, and can well meet the color requirement of conductive silver paste for automobiles in the future on the premise of meeting the conductivity, weldability and weldability.
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Citation Information

Patent Citations

  • An antioxidant silver paste for bus windshields and its preparation method

    CN109785991B

  • Conductive silver paste for automotive coated glass and preparation method thereof

    CN116665949B

  • Environmental-friendly black glaze for automotive glass and preparation method of black glaze

    CN102643023A

  • Acid-resistant and antioxidant silver paste for automotive glass and method for preparing acid-resistant and antioxidant silver paste

    CN105753335A

  • Anti-oxidation silver paste for car windshield glass and preparation method thereof

    CN109785991A

Cited By

  • Black conductive silver paste for automotive glass and preparation method therefor

    WO2026143941A1