จำนวน Repository ( 2 )
การศึกษาแก้วเซรามิกชีวภาพที่ประกอบด้วยผลึกเฟอร์โรแมกเนติกระดับนาโนจากระบบที่มีและไม่มีซิลิกาเป็นองค์ประกอบด้วยวิธีอินคอเปอเรชัน
The aim of this work was to study the magnetic properties of magnetic glass-ceramics with composition system SiO2-CaO-Na2O-P2O5-BaO-Fe2O3. The magnetic glass–ceramics were prepared by conventional melting at 1300oC for 2 h of the coprecipitation derived starting products and heat treated at different temperatures. The structure and microstructure of the samples were characterized by X-ray diffraction energy dispersive X-ray analysis (EDXA) and scanning electron microscopy. The magnetic measurement showed that the samples which contained barium ferrite exhibited magnetic behavior which is similar to soft magnetic materials. Finally the samples were soaked in simulated body fluid (SBF) for 14 days. The apatite was found to form on the surface layer of glass-ceramics and it increases with the barium ferrite content was increased.
การศึกษาประสิทธิภาพทางแม่เหล็กจากวัสดุคอมโพสิต ที่ใช้ในอุตสาหกรรม
The magnetic properties of Ba2FeMoO6 (BFMO) BaCO3 (Barium carbonate 99.9%) Fe(NO3)3.9H2O (Iron(II) nitrate 99.0%) and Mo03 (Molybdenum trioxide 99.0%) have been characterized. A slurry was prepared by mixing the powders with deionized (DI) water at a ratio of 1:7.5: by solid state reaction method through compression. In the case of BFMO sintering at 800 °C for a 4 6 and 10 hours. exhibited the largest hysteresis loop at 50 K. In addition the values of Ms and Mr indicate ferromagnetic behaviour in BFMO ceramics sintered from 600 °C to 800 °C. Finally the value of magnetization was reduced by using a lower sintering temperature SEM analysis revealed the physical appearance of sintered BFMO ceramic and showed the morphology of the BFMO powder was. coarse with an average diameter of 2 microns