Abstract
Silver powder was produced through water atomization with a pressure of 80 MPa and a flow rate of 220 L/min. Scanning electron microscopy analysis showed that as-prepared silver particles were aggregated and had various types of morphologies such as spherical, spheroidal and irregular. The volume average particle size of as-prepared silver powder was 7.7 μm at the drain rate of 0.024 kg/s. The particle size decreased with decreasing the drain rate. Powder X-ray diffraction revealed that the silver powder with a single phase and high crystallinity was formed. Surface treatment of silver powders classified to 5 μm was performed at 10,000°C by radio-frequency (RF) plasma under argon atmosphere. RF plasma treatment led to the formation of spherical particles from irregular particles. The crystallinity and crystallite of silver powder were increased by RF plasma treatment. X-ray photoelectron spectroscopy showed that the oxygen content in silver particles decreased from 500 ppm to 45 ppm. Thermomechanical analysis revealed that the shrinkage of silver powder reduced by the RF plasma treatment. It was clear that the particle characterization of silver powder was significantly modified by RF plasma treatment. The specific resistivity of silver paste sintered at 900°C exhibited 1.89×10-8 Ωm.
Highlights
Silver powder has been used in various industrial applications as electronic devices [1,2]
It was found that smaller particle sizes were produced at 80 MPa, as has been previously reported [14] for metal powders produced with water atomization
A silver powder was produced through water atomization with high water pressure and flow rate
Summary
Silver powder has been used in various industrial applications as electronic devices [1,2]. They are important for electrode material in ceramic capacitor [3,4] and silicon solar cells [5,6]. Silver powder has been synthesized for the above applications by chemical reduction method [7,8]. In a chemical reduction method, dispersants must be added to starting solution during the chemical reaction to prevent agglomeration of particle after drying. Chemical reduction method is time-consuming and complex process, as there are a number of processes involved, such as chemical reaction, separation, collection, and drying. Chemical reduction method has a high environmental-load because a large amount of solvent is discharge
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Metallurgical & Materials Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
