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Thermal conductivity estimation of inkjet-printed silver nanoparticle ink during continuous wave laser sintering

Title
Thermal conductivity estimation of inkjet-printed silver nanoparticle ink during continuous wave laser sintering
Author
문승재
Keywords
Thermal conductivity; Electrical resistance; Silver nanoparticle ink; Inkjet-printing
Issue Date
2015-06
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v. 85, Page. 904-909
Abstract
We determined the thermal conductivity of silver nanoparticle ink during laser sintering by applying the Wiedemann-Franz law to two-dimensional heat conduction equations. Ink with 34 wt% silver (Ag) nanoparticles with an average size of approximately 50 nm was printed on Eagle-XG (SamsungCorning) glass substrate by inkjet printing. Inkjet-printed patterns were irradiated with a 532 nm continuous wave laser at various laser intensities. To obtain a transient thermal conductivity trace of the ink during the laser sintering process, in-situ electrical resistance data were measured to estimate the thermal conductivity of the inkjet-printed ink using the Wiedemann-Franz law. Two-dimensional heat conduction equations were iteratively solved to obtain transient temperature information about the sintered ink. As the laser sintering temperature increased, the surface morphology of the sintered ink affected the thermal conductivity of the laser-sintered ink. Thermal conductivity of the laser-sintered Ag nanoparticle ink was estimated by considering the thermal conductivity of the air confined in pores. (C) 2015 Elsevier Ltd. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0017931015000642http://hdl.handle.net/20.500.11754/25849
ISSN
0017-9310; 1879-2189
DOI
10.1016/j.ijheatmasstransfer.2015.01.056
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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