期刊
CERAMICS INTERNATIONAL
卷 44, 期 18, 页码 22370-22377出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.08.364
关键词
3D printing; Sr ferrite; Gelation; Ceramic slurry
资金
- State Key Lab of Advanced Metals and Materials, China [2018-Z06]
- National Science Foundation, United States [IRES 1358088]
3D gel-printing (3DGP) opens new possibilities to process complex-shaped Sr ferrite parts for magnetic applications. In this study, a novel 3DGP process based on the hydroxyethyl methacrylate gelation system was employed to prepare complex-shaped Sr ferrite samples. To obtain highly loaded pseudo-plastic slurries, the Sr ferrite powder was modified by 1 wt% silane coupling agent and 2.5 vol% polymer Silok7050S was introduced into the ceramic slurry as a dispersant. In the printed samples, good dimensional accuracy and surface quality were achieved with a relatively low surface roughness of 5 mu m. After sintering, the Sr ferrite ceramics exhibited good surface quality and the surface roughness was 3.2 mu m. A homogeneous microstructure was observed. The bending strength for the sintered samples with the relative density of 97% was 83 MPa. In addition, the corresponding coercivity, remanence, and maximum magnetic energy product values were 271.2 kA/m, 0.383 T, and 26.34 kJ/m(3), respectively.
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