CuO对LiZn铁氧体微观结构和磁性能的影响

采用氧化物陶瓷工艺在1000～1160℃制备掺CuO的LiZn铁氧体Li0.35Zn0.3Fe2.35O4.结果表明,在1000～1100℃烧结时适量的CuO可促进固相反应和晶粒生长,降低烧结温度,提高样品的密度、饱和磁化强度4πMs和剩磁Br,降低矫顽力Hc.在1130℃烧结时,CuO基本无助烧作用,且增加CuO含量出现异常晶粒长大现象.在1160℃烧结时,样品内部形成巨晶,虽有利于降低Hc,但导致Br明显下降.

Effects of CuO on Microstructures and Magnetic Properties of LiZn Ferrites

LiZn ferrites with composition of Li0.35 Zn0.3 Fe2.35 O4 are prepared using an oxide ceramic processing route.The samples doped with CuO are sintered at 1000～1160℃.Results show that when sintered at 1000～1100℃,optimum CuO contents promote solid state reaction and crystal grain growth,decrease sintering temperature,and improve densities,saturation magnetization 4πMs and remanence Br as well as decrease coercive force Hc.When sintered at 1130℃,CuO has little effect on sintering promotion,and abnormal crystal appears with increasing CuO.Gigantic crystals form the samples when sintered at 1160℃,which deteriorates Br obviously though they are benefit to decrease Hc.