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摘要
Two-dimensional lamellar LaMnO3+delta powders comprised of nanoparticles were prepared by a citric acid-assisted sol-gel route. The calcined samples (60 wt%)-paraffin composites exhibit excellent microwave absorption properties. For all of the samples calcined at 700-900 A degrees C in interval of 100 A degrees C for 4 h under atmosphere, effective bandwidth (RL <-10dB) can cover 2-18 GHz at matching thickness of 1-5.5 mm. The optimal reflection loss (RL) of the samples calcined at 900 A degrees C is -24 dB at 8.0 GHz with a thickness of 2 mm. The excellent microwave absorption ability can be rationally attributed to microstructures and multiple-dielectric relaxation behaviors.
- 出版日期2017-7
- 单位沈阳工业大学
