论文部分内容阅读
Ni~(3+)and Cr~(3+)doped Fe Mn Co-Cu-O spinels have been prepared by solid phase sin- tering.The valence states and distribution of transition ions in the spinel crystals are inferred by the consideration of thermodynamic principle and crystalline field theory. The microstructure and performance of those are studied by X-ray diffraction(XRD), Fourier transform infrared(FT-IR),and IRE-2 infrared radiant instrument.Ni~(3+) and Cr~(3+)occupy the vacancies or substitute the other ions in the spinel structures and form diverse spinel structures,which exhibit infrared integral emissivities of 0.93 in the whole band,and 0.94 in the band within 14-25μm too.The content of Fe_2O_3 and MnO_2 in the spinel crystals changes,maybe it induces infrared radiativity of spinels differently.
Ni ~ (3+) and Cr ~ (3+) doped Fe Mn Co-Cu-O spinels have been prepared by solid phase sin- tering.The valence states and distribution of transition ions in the spinel crystals are inferred by the consideration of thermodynamic principle and crystalline field theory. The microstructure and performance of those are studied by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), and IRE- 2 infrared radiant instrument. Ni ~ (3+) and Cr ~ (3+) occupy the vacancies or substitute the other ions in the spinel structures and form diverse spinel structures, which exhibit infrared integral emissivities of 0.93 in the whole band, and 0.94 in the band within 14-25 μm too. The content of Fe 2 O 3 and MnO_2 in the spinel crystals changes, maybe it induces infrared radiativity of spinels differently.