Abstract
Co
1−
x
Zn
x
Fe
2
O
4
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 Co
3+
and Zn
2+
ions are found to occupy both tetrahedral and octahedral sites, and correspondingly, the fraction of Fe
3+
ions in B-site decreases nonlinearly in ferrites. The lattice parameters are found to concern with Zn
2+
, and the activation energy deduces from crystal strain and crystal vibrate increases with content Zn
2+
. The redistribution of the Co
3+
and Zn
2+
ions between tetrahedral and octahedral sites is related to the providing a selective tetrahedral and octahedral sites infrared radiance of Co
1−
x
Zn
x
Fe
2
O
4
ceramics with increasing
x
.