高饱和磁感应强度S型NiZn铁氧体的工艺优化研究

Synthesizing Parameters of Ni-Zn Ferrite with High Saturated Magnetic Flux

采用化学共沉淀法 ,按照一定的配比合成S型NiZn铁氧体。通过对NiZn铁氧体合成工艺参数的优化 ,可以提高NiZn铁氧体的饱和磁感应强度。研究表明 ,在 0～ 10 0℃的反应温度内 ,随着温度的升高 ,NiZn铁氧体的饱和磁感应强度增加 ;在其他条件相同的情况下 ,当主体反应物Fe3+ 浓度增加时 ,NiZn铁氧体的饱和磁感应强度相应地增加 ;共沉淀法合成的NiZn铁氧体在 10 0 0℃烧结温度下 ,60～ 2 40min范围内 ,烧结时间为 90min时 ,饱和磁感应强度值最大。

S-type NiZn ferrites with identical chemical composition were synthesized by co-deposition. Synthesizing parameters, such as reaction temperature, reactant concentration and sintering time, were investigated to improve the saturated magnetic flux density (σ s) of Ni-Zn ferrite. The results show that: (1) σ s of Ni-Zn ferrite increases with the increase of co-deposition reaction temperature in the range of 0 to 100 ℃; (2) σ s increases with the increase of reactant Fe 3+ concentration in co-deposition processing; (3) Maximum σ s can be achieved for the sample sintered at 1000 ℃ for 90 min.