Paper Title:
Microwave Absorption of BaLa0.5Fe11.5O19/SiO2 Nano-Powders
  Abstract

Nano-size BaM hexaferrites (BaLa0.5Fe11.5O19) were synthesized in the presence of SiO2 nano- particles by sol-gel method. The X-ray diffraction (XRD) patterns of ferrites annealed at above 900°C manifested that all the species had hexagonal crystal structure and no diffraction peaks of SiO2 found. Compared with BaLa0.5Fe11.5O19 powders, those synthesized in the presence of SiO2 nano-particles presented in smaller powder size, as proved by scanning electron microscopy (SEM). As a result, SiO2 nanoparticles promoted the formation of more homogeneous and finer ferrite crystal while the structure of hexaferrites consisted with that synthesized without SiO2 nano-particles. Microwave absorbing properties were evaluated. As a result, BaLa0.5Fe11.5O19/SiO2 showed good microwave absorbing properties with the maximum absorption more than 20dB.

  Info
Periodical
Advanced Materials Research (Volumes 105-106)
Edited by
Wei Pan and Jianghong Gong
Pages
380-382
DOI
10.4028/www.scientific.net/AMR.105-106.380
Citation
Z. D. Han, Q. R. Zhao, L. M. Dong, Z. Wu, X. Y. Zhang, "Microwave Absorption of BaLa0.5Fe11.5O19/SiO2 Nano-Powders", Advanced Materials Research, Vols. 105-106, pp. 380-382, 2010
Online since
April 2010
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