Densification behavior and microstructuralcharacteristics of nanocrystalline LiZn ferrites with chemicallyderived additives were investigated. NanocrystallineLi_(0.3)Zn_(0.4)Fe_(2.3)O_4 powders having a ? 15 nm sizewere prepared at a low temperature of 450 deg C by a chemicalsynthesis using a combustible polyacrylic acid (PAA). Smallamounts of Si, Ca and Mn were incorporated into thenanocrystalline ferrites via sol-gel reactions utilizing tetraethylorthosilicate, calcium isopropoxide and manganese acetate. Thisprocess was believed to give a homogeneous distribution of theadditives over the nanocrystalline ferrites. A uniformmicrostructure was obtained without any evidence ofexaggerated grain growth after sintering at 1100 deg C.Saturation magnetization and coercive force were found toincrease with the chemical additives. The results were comparedwith those of the same composition, but processed by theconventional batch-mixing of corresponding oxide additives.
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