Multiwalled carbon nanotube (MWCNT)/Ca1−xBaxBi2Nb2O9 (0 ≤ x ≤ 1)-layered thick film microwave-absorbing composites were prepared through the screen-printing method. The multilayered thick film composites were designed to improve their microwave absorption capabilities and the thickness of prepared thick films is around 115 μm. The layered thick film composites were synthesized with functionalized MWCNTs and co-precipitated Ca1−xBaxBi2Nb2O9 (0 ≤ x ≤ 1) (x = 0, 0.2, 0.4, 0.6, 0.8, and 1) Aurivillius-type ceramics. The microwave absorption, transmission and reflection properties were investigated in the J, X, and Ku-bands with a frequency range of 6–18 GHz. The multilayered thick film composites showed enhanced microwave absorption properties in the broadband frequency region. The multilayered composite with x = 0.8 had 1.5 times better microwave absorption than the only MWCNT thick film. This work presents a new approach to the fabrication of multilayered composites with enhanced microwave absorbance via simple screen-printing method.
Bibliographical noteFunding Information:
One of the authors, Dr. Vijaya R. Puri, gratefully acknowledges UGC New Delhi, India for the Research Scientist ‘C’ award. The author Gopal Kulkarni acknowledges DST-SERB for providing JRF under project No. [SERB/F/2139/2016-17]. Authors VDP, GKK, and VRP are thankful to UGC-SAP, DST-FIST, Department of Physics, Shivaji University, Kolhapur for their assistance. The author Hyung-Ho Park acknowledges the Nano-Convergence Foundation ( www.nanotech2020.org ) funded by the Ministry of Science and ICT (MSIT, Korea) & the Ministry of Trade, Industry and Energy (MOTIE, Korea) [Project Name: Commercialization development of super thermal insulation aerogel composite foam for cold insulation material].
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry