水热法与氧化物法低温共烧NiCuZn铁氧体性能比较

A comparison in performance of low temperature co-fired NiCuZn ferrites prepared by both hydrothermal synthesis and oxide methods

分别采用水热法与氧化物法制备Ni0.5Cu0.1Zn0.4Fe2O4铁氧体材料。基于低温共烧的要求,研究两种工艺铁氧体粉料电磁性能及显微结构的差异。结果表明,以硝酸盐为原材料的水热法可制备出良好烧结活性的NiCuZn铁氧体粉体,在添加一定量的Bi2O3及MoO3时,水热合成粉料的μi的温度稳定性较好,饱和磁通密度Bs较高,晶粒尺寸均匀、结构致密性好。

Ni0.5Cu0.1Zn0.4Fe2O4 ferrites were prepared by both hydrothermal synthesis and oxide methods. Based on requirement for low temperature co-firing, we investigated the difference in magnetic properties and microstructure of ferrites between the two methods. The result shows that NiCuZn ferrite could be synthesized by hydrothermal synthesis methods with good sintering activity. As doping a certain amount of Bi203 and MOO3, hydrothermal synthesis ferrite shows stable temperature characteristics on initial permeability（μi）, higher saturation magnetic flux density（Bs）, for its uniform grain size and good densification.