Doping CaO, CoO To The NiCuZn Ferrites's Magnetic Research

Soft magnetisc ferrites material is one kind of very important foundation Functional Materials, not only because it has high magnetic conductivity, high saturation magnetization and low coercive force, but also has low loss, high resistivity characteristics, therefore is widely applied in each kind of electronic products.In recent years as a result of the electronic component and the electronic device to the piece type, the miniaturization and the multi-purpose directions developed, therefore set a higher request to the NiCuZn soft magnetism ferrites material's comprehensive electromagnetism performance. But doping is one important means that improves and enhances the NiCuZn soft magnetism ferrites material's comprehensive electromagnetism performance,therefore many researchers have carried on the single-doping and the compound-doping research to the NiCuZn ferrites. This article is based on previous research,applies X-ray diffractiometer, vibrating magnetometer and Mossbauer spectrometer to dopes CaO solely and compound dopes CaO and CoO in the NiCuZn ferrites has conducted the research. The main results of this paper are given as follows:1. Analytical present NiCuZn ferrites's single-doping and compound-doping research of present situation.2. Combined with the sample's XRD figure, Ms-T figure and Mossbauer spectra, We have studied a single doping CaO on (NiO)0.30(CuO)0.20(ZnO)0.50Fe2O3 ferrite's microstructure and magnetic properties. We found that the NiCuZn ferrite grain size achieve a nanometer level prepared by the high-energy mechanical ball milling, doping right amount CaO along with calcining heat elevation, the sample's diffraction peak is incisive gradually, the peak width stricted, and was helpful to control crystal grain's growth, thus caused the grain size to be evener, the solid phase response was complete, and was helpful in increasing the sample's saturatio magnetization and enhancing the sample's Curie temperature; But when doped excess CaO, it could make the material of crystal cell parameters increase, iron ions reduced in A throne of digits and increased in the throne of digits of B, resulting in molecular magnetic moment decrease, macro affections saturation magnetization and magnetic susceptibility reduced. In addition, in the entire doping's process, the 57Fe atomic nucleus's resonating absorption spectrum's spectral line width has increased, but the hypefine field actually presents the declining trend.3. Combined with the sample's XRD figure, magnetic hysteresis loops and Mossbauer spectra,We have analysised and studied CaO and CoO compound doping to the (NiO)0.30(CuO)0.20(ZnO)0.50Fe2O3 ferrite's microstructure and magnetism performance influence. We have discovered When compound doping CaO and CoO mole compared to equal, and does not surpass the sample quality time 2.3%, the preparation NiCuZn ferrites material solid phase response is complete, the production crystal grain structure is complete, has the model ferrous magnetic hysteresis loop, and has the biggest saturatio magnetization and the big coercive force, and A and B sites on 57Fe atomic nucleus's resonance absorption spectral line's homogeneity different functions move the relativity and the relative area compared to presented the maximum value, and by now A and B on ultra fine field obtained the maximum value.Eventually,We have summarized the work of this paper and discussed the potential of researching direction of NiCuZn ferrite.