Abstract:

In the present study, the microstructural and magnetic characterization of the commercial SrFe12O19 magnets have been carried out.Density calculations for Y30BH and DM33H samples yielded 9.4 and 4.9 g/cm3, respectively corresponding to low porosity percentages.Scanning Electron Microscopy (SEM) examinations confirmed that there is a low amount of intergranular porosity. The magnetic hysteresis curves have been determined by using Vibrating Sample Magnetometer (VSM). The saturation and remanent magnetization of Y30BH sample have been 56.45 emu/g and 32 emu/g, respectively thus they have been higher than those of DM33H sample. Improved magnetization of Y30BH sample can be attributed to the high content of strontium hexaferrite phase with a lower coercivity, Hc 3750 Oe. Maximum energy products, (BH)max have been calculated to be 55.7 and 34.2 kJ/m3, respectively for Y30BH and DM33H magnets.

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