期刊
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
卷 100, 期 -, 页码 29-36出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ijthermalsci.2015.09.013
关键词
Ceramic-polymer composite; Thermal conductivity; Vertical alignment; Magnetic field
资金
- NRF grant - MEST [2014R1A2A1A11049625]
- National Research Foundation of Korea [2014R1A2A1A11049625] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Anisotropic boron nitride (BN) was vertically aligned along the direction of heat transport using a magnetic field. Iron oxide nanoparticres deposited onto the BN surface act as a magnetically responsive material allowing particle alignment. The amount of iron oxide deposited, and therefore the magnetic response, is easily controlled by modulating the precursors. The polarization of paramagnetic iron oxide in the magnetic field leads to the formation of vertical particle arrangements. The thermal conductivity of the synthesized vertically aligned composite increased from 1.765 W m(-1) K-1 to 3.445 W m(-1) K-1 with 30 vol% filler loading that is a 1.96-fold increase compared with a randomly oriented composite. The filler content affected both particle dispersion and arrangements, with homogeneously dispersed fillers aggregating due to induced dipole interactions into column-like structures with favorable thermal transport properties. (C) 2015 Elsevier Masson SAS. All rights reserved.
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