14 مرداد 1399
حامد بحيرايي

حامد بحیرایی

مرتبه علمی: استادیار
نشانی:
تحصیلات: دکترای تخصصی / فیزیک حالت جامد
تلفن: 09376003569
دانشکده: علوم پایه

مشخصات پژوهش

عنوان
The role of iron ions on microstructural and magnetic properties of MgCuZn ferrites prepared by sol-gel auto-combustion process
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Sol-gel processes Nanopowders Ceramics Microstructure Permeability
سال 1397
مجله MATERIALS RESEARCH BULLETIN
پژوهشگران حامد بحیرایی

چکیده

Mg0.3Cu0.2Zn0.5Fe2-xO4-3x/2 nanopowders (x = 0.00, 0.01, 0.02, 0.03 and 0.04) have been prepared by combustion route. The nanopowders were compacted and sintered at 900 °C for 4 h. Effect of iron ions on the microstructure as well as the electromagnetic properties of the sintered samples was studied. The results revealed that the content of Fe ions could influence the sintering behavior, microstructure, Curie temperature and magnetic properties of samples. The XRD patterns showed the formation of cubic spinel structure for all samples. However, the presence of a small amount of CuO as an impurity phase within the sample with x = 0.04 was detected. The microstructural evaluations revealed that the variation of iron content significantly affects densification and grain growth of samples. Saturation magnetization and Curie temperature were decreased with x. Also, the real part of permeability achieved a maximum while the resonance frequency reached a minimum when x = 0.03. With further increasing x, the real part of permeability dramatically decreased.