Effects of Addition of Na2O, Sb2O3, CaO, and ZrO2 on the Properties of Lithium Zinc Ferrite |
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Authors: | Nicolae Rezlescu Elena Rezlescu |
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Affiliation: | Institute of Technical Physics, Iasi 6600, Romania |
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Abstract: | Some effects of CaO, Na2O, Sb2O3, and ZrO2 additions on Li0.3Zn0.4Fe2.3O4 ferrite were studied to improve its density and other material properties. The densification behavior of the ferrite depended on the amount and type of additive. A relative density of ~98.5% was achieved with the addition of CaO. The grain size decreased with the addition of Na2O, CaO, and Sb2O3. The permeability and electrical resistivity increased with additives. CaO remarkably increased resistvity, whereas, ZrO2 increased permeability. Na2O and Sb2O3 increased the Curie temperature, whereas CaO and ZrO2 decreased it. These effects were attributed to mainly additive segregation on the grain boundaries, which suppressed grain-size development during the sintering of lithium zinc ferrite. |
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