Submicron hollow silver powder, its preparation method and uses

CN119772167BActive Publication Date: 2026-05-26JIANGXI JIAYIN SCI & TECH LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: JIANGXI JIAYIN SCI & TECH LTD
Filing Date: 2025-01-13
Publication Date: 2026-05-26

AI Technical Summary

Technical Problem

The preparation process of hollow structure silver powder in the existing technology is complicated, and it is difficult to control the high crystallinity and tap density. As a result, the conversion efficiency of domestic silver powder in the photovoltaic industry is low, the sintering activity and printing line shape are poor, and it is difficult to meet the needs of high-performance silver paste.

Method used

By optimizing the chemical deposition process and utilizing a nanobubble generator and a spiral submicrochannel reactor, the nucleation and crystallization processes were precisely controlled to prepare submicron hollow silver powder with high sintering activity and excellent conductivity. A specific combination of dispersants was used to prevent silver particle agglomeration, ensuring the integrity and stability of the hollow structure.

Benefits of technology

It significantly improves the conversion efficiency of photovoltaic cells, enhances the conductivity and antibacterial properties of submicron hollow silver powder, reduces the breakage rate, and broadens its application prospects in high-tech fields.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention belongs to the field of conductive materials technology. It provides a method for preparing submicron hollow silver powder, employing a nanobubble generator to produce bubbles in a reaction solution. A spiral submicrochannel reactor is used to create a hypergravity field to control the reaction solution in the reactor, achieving high-density directional deposition and crystallization of silver on the surface of spherical or near-spherical bubbles, thus regulating the crystal structure, morphology, density, and particle size of the hollow silver powder. By optimizing the chemical deposition process and precisely controlling the nucleation and crystallization processes, dispersibility is improved, resulting in submicron hollow silver powder with high sintering activity and excellent conductivity, significantly improving the conversion efficiency of photovoltaic cells.

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