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Constructing and optimizing core–shell structured Co@TiO2 as highly efficient electromagnetic wave absorber.
- Source :
- Journal of Materials Science: Materials in Electronics; Dec2021, Vol. 32 Issue 23, p27636-27646, 11p
- Publication Year :
- 2021
-
Abstract
- To achieve highly efficient electromagnetic wave absorber, elaborately designing magnetic–dielectric Co@TiO<subscript>2</subscript> microspheres with core–shell configuration are successfully constructed through a facile sequential process of liquid phase reduction–sol–gel–annealing. Owing to the core–shell configuration and the synergistic effect among magnetic and dielectric components, the annealed sample shows outstanding electromagnetic wave absorption (EMA) in X and K<subscript>u</subscript> band. Impressively, a maximum reflection loss (RL<subscript>max</subscript>) is reached –56.6 dB at a coating thickness of 2.3 mm with corresponding effective absorption bandwidth (EAB<subscript>10</subscript>) of 7.2 GHz (including 65% of K<subscript>u</subscript> band and 82.5% of X band), much stronger than those of as-prepared Co (EAB<subscript>10</subscript> of 1.6 GHz, RL<subscript>max</subscript> of 14.6 dB) and pristine Co@TiO<subscript>2</subscript> (EAB<subscript>10</subscript> of 2.9 GHz, RL<subscript>max</subscript> of 16.3 dB). An EAB<subscript>10</subscript> covering completely the whole X and K<subscript>u</subscript> band could be obtained by controlling the thickness only from 2.0 mm to 2.5 mm. The composites have both outstanding RL and wide EAB<subscript>10</subscript> with the thin coating thickness, reinforcing that fabricating core–shell configuration composites is an efficient strategy to boost the EMA efficiency. [ABSTRACT FROM AUTHOR]
- Subjects :
- ELECTROMAGNETIC wave absorption
ELECTROMAGNETIC waves
SURFACE coatings
Subjects
Details
- Language :
- English
- ISSN :
- 09574522
- Volume :
- 32
- Issue :
- 23
- Database :
- Complementary Index
- Journal :
- Journal of Materials Science: Materials in Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 153416540
- Full Text :
- https://doi.org/10.1007/s10854-021-07137-1