Abstract
Co1−xZnxFe2O4 ferrites were prepared by solid state reaction. The microstructure and performance were studied by X-ray diffraction, X-ray absorption fine-structure analysis and IRE-2 infrared radiant test. It is found that infrared radiance show a nonlinear change with x, exhibiting the infrared radiance of this material improved and the average radiance in the 8–14 µm waveband reached 0.91. The Co3+ and Zn2+ ions are found to occupy both tetrahedral and octahedral sites, and correspondingly, the fraction of Fe3+ ions in B-site decreases nonlinearly in ferrites. The lattice parameters are found to concern with Zn2+, and the activation energy deduces from crystal strain and crystal vibrate increases with content Zn2+. The redistribution of the Co3+ and Zn2+ ions between tetrahedral and octahedral sites is related to the providing a selective tetrahedral and octahedral sites infrared radiance of Co1−xZnxFe2O4 ceramics with increasing x.
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