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Tape casting of cobalt ferrite from nonaqueous slurry |
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| Authors: | Gang Jian Dongxiang Zhou Junyou Yang Qiuyun Fu |
| Institution: | 1. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China;2. MOE Engineering Research Center for Information Functional Ceramics, Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China;3. State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China |
| Abstract: | This paper describes the fabrication of CoFe2O4 thick films using the tape casting method from nonaqueous slurry. CoFe2O4 particles with average size of ∼800 nm were prepared by the solid-state reaction method. Sediment volumes and viscosity were tested to study the effects of dispersant in reducing aggregations in slurry. Slurry with 0.25 wt% dispersant amounts and 41.3 wt% solid content showed the optimal stability and rheological properties. A tape velocity of 8 cm/s was used in this study considering the non-Newtonian flow behavior at low shear rate. CoFe2O4 ceramic films sintered at 1150 °C for 2 h have dense structure (relative density of 94%) and exhibited ferromagnetic properties with in-plane saturation magnetization of ∼324 emu/cm3. |
| Keywords: | Cobalt ferrite Thick film Tape casting Slurry Ferromagnetic property |
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