Abstract
Nanocrystalline Co1-xNixFe2O4 ferrite powder with 0 ≤ x ≤ 1 was prepared by the spraying-coprecipitation method. The microstructure of Co1-xNixFe2O4 ferrite powder was characterized by thermogravimetry-differential scanning calorimetry, X-ray diffraction (XRD), transmission electron microscope and specific surface area test. The magnetic properties of Co1-xNixFe2O4 ferrite were measured with a vibrating sample magnetometer at room temperature. The results show that uniform and fine nanocrystalline Co1-xNixFe2O4 ferrite powders are obtained by the spraying-coprecipitation method. Nanocrystalline Co1-xNixFe2O4 ferrite has a solid solution of the spinel structure according to the XRD patterns. The grain size of powder calcined at 600°C for 1.5 h is about 40 nm. There are few agglomerates with average sizes below 100 nm. The specific saturation magnetization and coercivity of nanocrystalline Co1-xNixFe2O4 ferrite decrease with the increase of the content of Ni2+ at room temperature.
Original language | English |
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Pages (from-to) | 160-163 |
Number of pages | 4 |
Journal | Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society |
Volume | 35 |
Issue number | 2 |
State | Published - Feb 2007 |
Keywords
- Cobalt-nickel ferrite
- Magnetic property
- Nanocrystalline materials
- Spraying-coprecipitation method