Influence of the MN/CA (Metal Nitrates to Citric Acid) Molar Ratio on the Processing of Nickel Zinc Ferrite Nanocrystalline Powders Synthesized by a Sol-Gel Auto Combustion Method
Nanocrystalline powders of the single phase nickel-zinc ferrite have been prepared by a sol-gel auto-combustion process. The nitrate-citrate gels were prepared from metal nitrates and citric acid solutions with various molar ratios of the metal nitrates to citric acid. The results showed that the nitrate citrate gels exhibit a self-propagating behavior after ignition in air. The thermal decomposition of nitrate-citrate gels and the phase evolution of the as-burnt powder were investigated by DTA/TG and XRD techniques respectively. Transmission electron microscope (TEM) was also used to characterize the microstructure of the material. The results also revealed that the molar ratio of the metal nitrates to citric acid has important effects on the formation temperature and the crystallite size which affect the magnetic properties of the nickel-zinc ferrite.
Nickel-zinc Sol-gel Auto combustion NanocrystaUine Soft ferrite
M.R.Barati S.A.Seyyed Ebrahimi A.Badiei
Center of Excellence in Magnetic Materials,School of Metallurgy and Materials,University of Tehran,T School of Chemistry,University of Tehran,Tehran,Iran
国际会议
The 10th International Conference on Ferrites(2008中国国际铁氧体研讨会)
成都
英文
45-46
2008-10-10（万方平台首次上网日期，不代表论文的发表时间）