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以不同质量的C粉替代Fe粉作为合成燃料,通过自蔓延高温合成(SHS)反应制备NiCuZn铁氧体粉体,并将合成粉体压成环进行烧结。采用X射线衍射、扫描电子显微镜、振动探针式磁强计和阻抗分析仪研究了C粉含量对NiCuZn铁氧体烧结样品的物相、形貌、密度及磁性能的影响。结果表明:相对于Fe粉,以C粉为SHS燃料合成NiCuZn铁氧体不会引入杂质;在C含量为5%时,获得NiCuZn铁氧体固相反应充分,具有单一的尖晶石相;其比饱和磁化强度为45.5A.m2/kg,比剩余磁化强度为12.1 A.m2/kg,矫顽力为13.1 A/m。975℃烧结2 h的样品在1 MHz频率下的磁导率高达5936。
Different quality of C powder instead of Fe powder as a synthetic fuel, NiCuZn ferrite powder by SHS reaction, and the synthesis of powder pressed into rings for sintering. The effects of C content on the phase, morphology, density and magnetic properties of NiCuZn ferrite sintered samples were investigated by X-ray diffraction, scanning electron microscopy, vibrating probe magnetometer and impedance analyzer. The results show that no NiCuZn ferrite is synthesized when C powder is used as SHS fuel compared with Fe powder. When C content is 5%, NiCuZn ferrite has a solid phase reaction with a single spinel phase. The specific magnetization was 45.5A.m2 / kg, the remanent magnetization was 12.1 A.m2 / kg and the coercivity was 13.1 A / m. Samples sintered at 975 ° C for 2 h had permeability of 5936 at 1 MHz.