期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 29, 期 11, 页码 2333-2341出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2009.01.028
关键词
Ferrites; Thermal spraying; Solid-state reaction; Magnetic properties; Dielectric properties
资金
- Ministry for Higher Education, Science and Technology of the Republic of Slovenia
- Tekes
- Finnish Funding Agency of Technology and Innovation
- Ministry of Innovation, Science, Research and Technology of the State of North Rhine-Westphalia of Germany
- INRIM
Thick coatings of barium hexaferrite with the compositions BaFe(12)O(19) and BaCoTiFe(10)O(19) were prepared using atmospheric plasma spraying (APS) technology. The coatings were prepared from pre-reacted powders of the desired composition. The as-deposited coatings were poorly crystallized, but their crystallinity was improved with a subsequent annealing. The crystallization mechanism of the sprayed hexaferrites was studied during annealing up to 1300 degrees C, using X-ray powder diffraction combined with thermal analysis and with electron microscopy including microanalysis. Single-phase coatings were obtained after annealing treatments at 1100-1300 degrees C. Their magnetic properties showed that they would be suitable for absorbers at microwave and mm-wave frequencies, depending on the coating phase's composition, the crystallinity and the thicknesses. (C) 2009 Elsevier Ltd. All rights reserved.
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