ISSN:
1662-9752
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
This work involved a morphological, microstructural and magnetic characterization ofnanosized powders and sintered samples of Ni-Zn ferrite doped with chromium. The effect ofsubstituting Fe3+ for Cr3+ on the final characteristics of the powders and sintered samples wasinvestigated. The Ni-Zn ferrite powders were prepared by combustion reaction using nitrates andurea as fuel, based on the concepts of propellant chemistry. The samples were uniaxially compactedby dry pressing (385 MPa) and sintered at 1200oC/2h, using a heating rate of 5ºC/min. The Ni-Znpowders and compacted samples were characterized by X-ray diffraction (XRD), scanning electronmicroscopy (SEM), and the measures of their magnetic properties. The results revealed theformation of the cubic crystalline phase of the inverse spinel of Ni-Zn-Cr ferrite. The averagecrystallite size was 21 nm and 57 nm while the saturation magnetization was 47.0 and 73.1 emu/gfor the powder and the sintered sample, respectively
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.591-593.120.pdf
Permalink