(Ni{sub}0.2Cu{sub}0.2Zn{sub}0.6O){sub}1.01(Fe{sub}2O{sub}3){sub}0.99 nanocrystalline powders were synthesized by a citrate precursor method. The nanocrystals with grain sizes in the range from 10nm to 60nm were obtained at various calcining temperatures. Because of excellent sintering activity, the nanocrystals can be sintered below 900°C without the addition of sintering aids. The sintered body possesses fine-grained microstructure, showing high initial permeability up to 700 with high DC resistivity of 10{sup}9 - 10{sup}10 ohm·cm. Influences of initial particle size as well as sintering temperature on microstructures and properties of sintered body were studied. The results show that the nanocrystalline Ni-Cu-Zn ferrite is a promising material for high frequency MLCI application.
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