Dendrite Silver Powder for High-Conductivity Resin Loading
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Solution Overview
Problem
Existing silver powders require a large amount to impart high conductivity to resins, and there is a need for a more efficient method to achieve this with a smaller quantity.
Innovation Solution
A silver powder with dendrite-shaped particles having a thin trunk and numerous branches, produced through electrolysis using a specific electrolyte solution containing hydantoin or its derivatives, ensuring high conductivity even with a smaller amount added.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional silver powders are used to impart conductivity to resins, then sufficient conductivity can be achieved, but a large amount of silver powder is required
Solution Approach 1:
The invention changes the morphological parameters of silver particles from conventional spherical or irregular shapes to dendrite shapes with specific characteristics (trunk thickness 10-280 nm, branches per length 6-30 branches/μm). This parameter change in particle morphology dramatically improves conductivity efficiency, allowing high conductivity to be achieved with smaller amounts of silver powder added to the resin.
2Quantity of substance
If dendrite silver particles with joined branches are used, then high bulk density is achieved, but conductivity efficiency per unit amount is reduced
Solution Approach 1:
The invention applies local quality by maintaining dendrite particle morphology with thin trunks and numerous branches rather than allowing branches to join together. This preserves the high surface area to volume ratio and branching structure locally, ensuring high conductivity efficiency while achieving appropriate bulk density for resin incorporation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The silver powder achieves high conductivity in resins with a smaller amount, maintaining or exceeding conventional conductivity levels while reducing the required quantity, and is suitable for conductive resin compositions.
Implementation Method 1
a step of reducing silver ions through electrolysis of an electrolyte solution containing silver ions and hydantoin or a derivative thereof
Data Source
AI summary
A silver powder containing dendrite silver particles is provided. The dendrite silver particles are in a dendrite shape having one trunk and a plurality of branches branching from the trunk. The thickness of the trunk of the dendrite silver particles is from 10 to 280 nm. The number of the branches per length of the trunk is from 6 to 30 branches/μm. The percentage by number of the dendrite silver particles in the whole of silver particles is 50 N % or more. This silver powder is produced by reducing silver ions through electrolysis of an electrolyte solution containing silver ions and hydantoin or a derivative thereof.