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M-type strontium ferrite is a traditional permanent magnetic materials in the automotive, computer, power tools, household appliances, office equipment and electro-acoustic field and other industries have wide applications in the world, driven by automation trends will have a very large space for development, how to ensure the price advantage of the ferrite under the premise of improving its magnetic properties has been the focus of social research. This article is in the magnetic Engineering Research Center of Anhui Province and Benxi Iron and Steel Co., Ltd. Universal joint development of high performance magnetic materials in the context of strontium ferrite, prepared using traditional ceramic anisotropic M-type strontium ferrite, the main research different additives and milling process on the secondary magnetic properties of the sample, by experiment to find the best secondary additive ratio, suitable milling process. Then through the MATS-2010 permanent measuring devices, X-ray diffraction (XRD), scanning electron microscopy (SEM), and other modern analytical testing methods, the sample structure and magnetic properties were characterized, the main results are as follows: 1, using scanning electron microscopy (SEM) and energy spectrum scattered radiation spectrometer (EDS) for BX Universal Presintered material for selection, choose the shape is good, less impurity Y30H-2 calcined material. 2, were done through CaCO3, Cr2O3, H3B03, Sorbitol on strontium ferrite magnetic properties, find the best dosage of additives range: CaCO3 = 0.7-0.9%, Cr203 = 0.3-0.5%, H3B03 = 0.2 ~ 0.4%, SiO2 = 0.3 ~ 0.4%, sorbitol 0.8% = 0.7. 3, by changing the milling time and ball milling method to study the magnetic properties of the samples and found that: When the milling time is 5h magnetic properties of the sample is the best; Benxi Universal Nanjing Nanda than homemade ball mill planetary ball mill Instrument The milling effect, remanence Br prepared sample results to improve the 10-20mT, Hcj to improve the 15-20kA · m-1. 4, of sintering temperature on the preparation of M-type strontium ferrite structure, remanence Br and coercivity Hcj of coercive force, the results show when the sintering temperature is 1235 ℃, the best the magnetic properties of samples. 5, in the optimum range of added value, do CaCO3, Cr2O3, H3BO3, SiO2, sorbitol orthogonal experiment, the experiment found that when CaCO3 = 0.8%, Cr203 = 0.3%, H3B03 = 0.2%, SiO2 = 0.4%, Sorbitol = 0.7%, the prepared sample magnetic best by Beijing Institute of Metrology magnetic measurements laboratory NIM-2000F ferrite magnets standard measuring device samples obtained magnetic Br = 410.2mT, Hcj = 316.0 kA · m-1, (BH) max = 31.8kJ · m-3. basically reached Japan TDK Corporation FB5H series of requirements. 6, using X-ray diffraction (XRD) and scanning electron microscopy (SEM) for achieving the requirements of Japan's TDK Corporation FB5H M-type strontium ferrite structure and morphology were characterized and found: Sample 5 is a single-phase strontium M Ferrite: hexagonal crystal morphology of the sample, the magnetization direction along the C axis should be neat, good orientation.
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