Structure, Infrared Radiation Properties and Mssbauer Spectroscopic Investigations of Co_(0.6)Zn_(0.4)Ni_xFe_(2-x)O_4 Ceramics  

作　　者：Ying Zhang Jun Lin Dijiang Wen 

机构地区：[1]Inorganic Materials Department, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China [2]Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China

出　　处：《Journal of Materials Science & Technology》2010年第8期687-692,共6页材料科学技术（英文版）

基　　金：supported by the Key Project in Science and Technology Innovation Cultivation Program of Soochow University,China (Contract No.Q3109808)

摘　　要：Ferrite compound Co0.6Zn0.4NixFe2-xO4 was synthesized by solid state reaction. The structure and performance of Co0.6Zn0.4NixFe2-xO4 compounds were studied by Moessbauer spectroscopy, X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS） and infrared radiant tester. Moessbauer spectroscopy and XPS analysis show the valence states and distribution of cations in Co0.6Zn0.4NixFe2-xO4. Zn2＋ has invariably shown preference for the tetrahedral sites, and Ni2＋ has the preference for the octahedral sites. The occupancy of Fe3＋ linearly increases on the tetrahedral sites, and sharply decreases on the octahedral sites with increasing x, owing to its gradual replacement by Ni2＋ on the octahedral sites. It indicates that due to the occupation of octahedral sites by the majority of Ni2＋, Fe3＋ decreasingly migrated from the octahedral sites to the tetrahedral sites and substituted Co3＋ sites, which made the number of Co3＋ in the tetrahedral sites decreasing. According to the measurement results of XRD and the infrared radiant tester analysis, the lattice parameter and infrared radiance have shown a nonlinear variation, exhibiting the infrared average radiance of 0.92 in the 8-14μm waveband, and the results demonstrate that these Co-Zn-Ni spinel ferrites have potential for application in a wide range of infrared heating and drying materials.Ferrite compound Co0.6Zn0.4NixFe2-xO4 was synthesized by solid state reaction. The structure and performance of Co0.6Zn0.4NixFe2-xO4 compounds were studied by Moessbauer spectroscopy, X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS） and infrared radiant tester. Moessbauer spectroscopy and XPS analysis show the valence states and distribution of cations in Co0.6Zn0.4NixFe2-xO4. Zn2＋ has invariably shown preference for the tetrahedral sites, and Ni2＋ has the preference for the octahedral sites. The occupancy of Fe3＋ linearly increases on the tetrahedral sites, and sharply decreases on the octahedral sites with increasing x, owing to its gradual replacement by Ni2＋ on the octahedral sites. It indicates that due to the occupation of octahedral sites by the majority of Ni2＋, Fe3＋ decreasingly migrated from the octahedral sites to the tetrahedral sites and substituted Co3＋ sites, which made the number of Co3＋ in the tetrahedral sites decreasing. According to the measurement results of XRD and the infrared radiant tester analysis, the lattice parameter and infrared radiance have shown a nonlinear variation, exhibiting the infrared average radiance of 0.92 in the 8-14μm waveband, and the results demonstrate that these Co-Zn-Ni spinel ferrites have potential for application in a wide range of infrared heating and drying materials.

关 键 词：Infrared radiance Moessbauer spectroscopy NIO Spinel ferrites 

分 类 号：O481.4[理学—固体物理] TQ630.71[理学—物理]