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Spray pyrolysis of phase pure AgCu particles using organic cosolvents

Published online by Cambridge University Press:  25 September 2013

Kai Zhong ,
George Peabody ,
Elizabeth Blankenhorn ,
Howard Glicksman  and
Sheryl Ehrman
Kai Zhong
Affiliation:
Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20740
George Peabody
Affiliation:
Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20740
Elizabeth Blankenhorn
Affiliation:
Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20740
Howard Glicksman
Affiliation:
DuPont Electronic Technologies, Research Triangle Park, North Carolina 27709
Sheryl Ehrman*
Affiliation:
Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20740
*
a)Address all correspondence to this author. e-mail: sehrman@umd.edu
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Abstract

Nano- and micron-sized metal particles have important applications in catalysis and in the medical and electronic industries. For applications requiring high conductivity, such as thick film conductive pastes or isotropic conductive adhesives, AgCu particles combine high conductivity with advantages of lower costs. Here, we report the generation of AgCu particles by spray pyrolysis, a process that has the advantages of simple experimental setup, large-scale production ability, and controllable particle size. Solutions of copper nitrate and silver nitrate dissolved in deionized water with either 40 vol% ethanol (ET) or 40 vol% ethylene glycol (EG) were used as the precursor. Phase separation was observed during the generation of AgCu particles, and the particles were mainly Ag-rich and Cu-rich solid solutions. The short reactor residence time experiments indicated that both the cosolvent properties and operating conditions affect the particle formation process and change the structure of particles.

Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 19 , 14 October 2013 , pp. 2753 - 2761
Copyright
Copyright © Materials Research Society 2013 

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