TY - JOUR
T1 - Improvement in magnetic and microwave absorption properties of nano-Fe 3 O 4 @CFs composites using a modified multi-step EPD process
AU - Movassagh-Alanagh, Farid
AU - Bordbar Khiabani, Aidin
AU - Salimkhani, Hamed
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017/10/31
Y1 - 2017/10/31
N2 - In this research, structural, magnetic and microwave absorption properties of multifunctional nano-Fe 3 O 4 @carbon fibers (CFs) composites in the frequency range of 8.2–18 GHz were investigated. The nano-Fe 3 O 4 particles (30 nm) were successfully prepared using co-precipitation method. These particles were then deposited on CFs using two conventional and modified multi-step electrophoretic deposition (EPD) processes to investigate the contributing effects of uniformity of coating on their magnetic and microwave absorption properties. The magnetic properties measurements represented that the coercivity (H c ), saturation magnetization (M s ) and residual magnetization (M rs ) values of the coated CFs using the conventional EPD process were 531.4 Oe, 15.2 emu/g and 5.2 emu/g, respectively, while for the CFs coated with modified EPD process these values were 167.8 Oe, 33.1 emu/g and 1.7 emu/g, respectively. It was found that by employing conventional EPD process, the maximum reflection loss (RL) of −9.87 dB was obtained for the composite containing 20 wt.% nano-Fe 3 O 4 @CFs and 80 wt.% epoxy-resin with the thickness of 2 mm, while by using the modified multi-step EPD process, due to enhancement of deposited coating quality, the achieved maximum RL was approximately increased by −0.64 dB and reached to −10.51 dB with an effective absorption bandwidth of about 4 GHz for the similar sample with the same thickness and weight ratio of nano-Fe 3 O 4 @CFs composites to epoxy 828.
AB - In this research, structural, magnetic and microwave absorption properties of multifunctional nano-Fe 3 O 4 @carbon fibers (CFs) composites in the frequency range of 8.2–18 GHz were investigated. The nano-Fe 3 O 4 particles (30 nm) were successfully prepared using co-precipitation method. These particles were then deposited on CFs using two conventional and modified multi-step electrophoretic deposition (EPD) processes to investigate the contributing effects of uniformity of coating on their magnetic and microwave absorption properties. The magnetic properties measurements represented that the coercivity (H c ), saturation magnetization (M s ) and residual magnetization (M rs ) values of the coated CFs using the conventional EPD process were 531.4 Oe, 15.2 emu/g and 5.2 emu/g, respectively, while for the CFs coated with modified EPD process these values were 167.8 Oe, 33.1 emu/g and 1.7 emu/g, respectively. It was found that by employing conventional EPD process, the maximum reflection loss (RL) of −9.87 dB was obtained for the composite containing 20 wt.% nano-Fe 3 O 4 @CFs and 80 wt.% epoxy-resin with the thickness of 2 mm, while by using the modified multi-step EPD process, due to enhancement of deposited coating quality, the achieved maximum RL was approximately increased by −0.64 dB and reached to −10.51 dB with an effective absorption bandwidth of about 4 GHz for the similar sample with the same thickness and weight ratio of nano-Fe 3 O 4 @CFs composites to epoxy 828.
KW - Carbon fiber
KW - Electrophoretic deposition
KW - Magnetic properties
KW - Microwave absorption
UR - https://www.scopus.com/pages/publications/85019976648
U2 - 10.1016/j.apsusc.2017.05.207
DO - 10.1016/j.apsusc.2017.05.207
M3 - Article
AN - SCOPUS:85019976648
SN - 0169-4332
VL - 420
SP - 726
EP - 739
JO - Applied Surface Science
JF - Applied Surface Science
ER -
