论文部分内容阅读
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.
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 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 The redistribution of the Co3 + and Zn2 + ions between the tetrahedral and octahedral sites is related to the providing a selective tetrahedral and octahedral sites infrared radiance of Co1-xZnxFe2O4 ceramics with increasing x.