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Flame synthesis of mixed tin‐silver‐copper nanopowders and conductive coatings
Author(s) -
Sharma Munish K.,
Qi Di,
Buchner Raymond D.,
Swihart Mark T.,
Scharmach William J.,
Papavassiliou Vasilis
Publication year - 2016
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.15132
Subject(s) - materials science , sintering , tin , copper , electrical resistivity and conductivity , coating , conductivity , metallurgy , electrical conductor , nanoparticle , chemical engineering , composite material , nanotechnology , chemistry , electrical engineering , engineering
The single‐step direct synthesis of tin‐silver‐copper nanopowders and nanostructured coatings using the flame‐based high‐temperature reducing jet (HTRJ) process is reported. Nanostructured coatings were deposited and sintered within the HTRJ reactor to study the effect of reductive sintering temperature on their electrical conductivity and surface morphology. Although the ultimate application of these nanoparticles is in printed electronics, which requires dispersing them as stable inks before depositing and sintering them, our approach of direct deposition from the gas phase provides an upper limit on the conductivity achievable with a given composition. The directly deposited coatings had high electrical conductivity, including a value of 2 × 10 6 S/m for 36 wt % Cu‐40 wt % Ag‐24 wt % Sn sintered at 200°C. This is twice the conductivity of a pure silver coating prepared under similar conditions. Moreover, similarly high electrical conductivity was achieved using only 20% Ag with sintering at 300°C. © 2015 American Institute of Chemical Engineers AIChE J , 62: 408–414, 2016