Rational Construction of Uniform CoNi-Based Core-Shell Microspheres with Tunable Electromagnetic Wave Absorption Properties.

ABSTRACT: Core-shell particles with integration of ferromagnetic core and dielectric shell are attracting extensive attention for promising microwave absorption applications. In this work, CoNi microspheres with conical bulges were synthesized by a simple and scalable liquid-phase reduction method. Subsequent coating of dielectric materials was conducted to acquire core-shell structured CoNi@TiO₂ composite particles, in which the thickness of TiO₂ is about 40 nm. The coating of TiO₂ enables the absorption band of CoNi to effectively shift from K_u to S band, and endows CoNi@TiO₂ microspheres with outstanding electromagnetic wave absorption performance along with a maximum reflection loss of 76.6 dB at 3.3 GHz, much better than that of bare CoNi m

SUBMITTER: Chen N 

PROVIDER: S-EPMC5816601 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature