准低烧结温度条件下制备的高磁导率NiZn铁氧体

High permeability NiZn ferrites sintered at a low temperature of 930℃

通过减小原材料粒度和在主配方中添加适量CuO,显著降低了NiZn铁氧体样品的烧结温度,在930℃低烧结温度条件下制备的NiZn铁氧体样品的晶粒更完整,组织更致密,使得材料的初始磁导率>1500。与传统工艺条件下制备的磁导率相当的NiZn铁氧体相比,本文中使用较低的NiO含量、预烧温度和烧结温度,制备的NiZn铁氧体具有更好的性能和较低的生产成本。

The NiZn ferrites with initial permeability over 1500 were sintered at 930℃ through the increase of CuO content and the decrease of granularity of raw materials particles. The permeability of NiZn ferrite sintered at 930℃ was the same as that prepared by conventional method. Moreover, the NiZn ferrite sintered at 930℃ has higher density, lower loss and better temperature characteristic. SEM analysis shows that the grains of the NiZn ferrite sintered at 930℃ was more perfect and the microstructure more compact. The production cost of NiZn ferrite sintered at 930℃ was more lower because of the lower NiO content and lower calcining and sintering temperature.