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Novel Ag/Si composite particles through galvanic displacement and its conductive application
Chenfan Yang1, Xuelong Liu1, Tiezheng Lv1
1College of Materials Science and Engineering, Hunan University, Changsha, 410012 Hunan China.
Springerplus
|September 22, 2016
Summary
Researchers created novel silver/silicon (Ag/Si) composite particles from silicon sludge. These conductive fillers offer a cost-effective alternative for electronic applications, reducing precious metal usage.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Silicon (Si) sludge from wafer slicing is a waste product.
- Developing cost-effective conductive materials is crucial for electronics.
Purpose of the Study:
- To synthesize novel silver/silicon (Ag/Si) composite sub-micro particles.
- To utilize silicon sludge as a precursor for conductive fillers.
- To evaluate the properties and potential applications of the synthesized Ag/Si composite particles.
Main Methods:
- Galvanic displacement reaction to synthesize Ag/Si composite particles.
- Characterization using X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy dispersive X-ray (EDX).
- Electrical property analysis, including resistivity measurements of screen-printed conductive ink.
Main Results:
- Successfully synthesized Ag/Si composite sub-micro particles with a hetero-epitaxial growth mechanism.
- The composite particles retained the flake shape of Si sludge with a narrow size distribution.
- An Ag/Si composite-based conductive ink exhibited low resistivity at the µΩ cm level without formulation optimization.
Conclusions:
- Silicon sludge can be transformed into highly conductive Ag/Si composite particles.
- These particles are suitable as conductive fillers in various applications.
- The synthesis method offers a way to reduce the consumption of precious metals.
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