A magnetic powder, M-type barium hexaferrite (BaFe12O19), was consolidated with the spark plasma sin-tering process. Three different holding temperatures, 850℃, 875℃ and 900℃ were applied to the spark plasma sinteringprocess with the same holding times, heating rates and compaction pressure of 30 MPa. The relative density was mea-sured simultaneously with spark plasma sintering and the convergent relative density after cooling was found to be pro-portional to the holding temperature. The full relative density was obtained at 900℃ and the total sintering time wasonly 33.3 min, which was much less than the conventional furnace sintering method. The higher holding temperaturealso led to the higher saturation magnetic moment (σs) and the higher coercivity (Hc) in the vibrating sample magne-tometer measurement. The saturation magnetic moment (σs) and the coercivity (Hc) obtained at 900℃ were 56.3 emu/g and541.5 Oe for each.

 Abstract  1. Introduction  2. Experimental  3. Results and Discussion  4. Conclusion  Acknowledgments  References

• Jung, Im Doo(Department of Mechanical Engineering, Pohang University of Science and Technology)
• Kim, Youngmoo( Agency for Defense Development) | Kim, Youngmoo
• Hong, Yang-Ki( Department of Electrical and Computer Engineering, The University of Alabama AL35487) | Hong, Yang-Ki
• Park, Seong Jin( Department of Mechanical Engineering, Pohang Universit) | Park, Seong Jin