ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
New chemical synthesis procedure for the preparation of nickel zinc doped W-typehexagonal barium ferrite and aluminium doped yttrium-iron garnet nanoparticles has beendeveloped, using the nitrate-citrate sol-gel auto-combustion method (NCSAM). The crystallinephase attributes, microstructure, morphology, specific surface area, Curie temperature (TC),permeability, thermal behavior of the as-burnt phase and the heat treated powders werecharacterized using XRD, SEM, FT-IR, BET, TG-DTA and AC magnetic permeability withfrequency shift. In the case of the hexaferrite, the pure W-type ferrite phase is formed during 4 hourannealing at a temperature of 1200 ºC, the garnet phase is formed at a lower temperature i.e. 1000ºC. Furthermore it has been confirmed, that the AC magnetic permeabilities of the garnet materialsare strongly depending on the chemical composition
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.589.167.pdf
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