Cu含量对Ni-Cu-Zn铁氧体烧结体微观结构和性能的影响

Effects of Cu Content on the Microstructure and Properties of Sintered Ni-Cu-Zn Ferrites

采用微波水热法制备了一系列的Ni0.5-XCuxZn0.50Fe2O4(x=0．05,0．10,0．15,0．20)铁氧体粉末,并用该纳米粉在910℃／4 h下,低温烧结形成了致密的陶瓷体。用XRD、SEM对烧结体的相结构和显微结构进行了研究,采用M155振动样品磁强计测试了烧结体的饱和磁化强度。研究表明,当Cu含量在0．05～0．20的范围内,Cu2+通过占据不同的离子空位,影响晶胞参数的大小;随着Cu含量的增加,烧结体的密度、晶粒尺寸、饱和磁化强度都有增长的趋势。

A series of Ni0.5-xCuxZn0.50Fe2O4 （x = 0. 05,0.10,O. 15,0. 20） terntes nanopowoers, were synthesized by microwave-hydrothermal method, and sintered into dense-ceramics under the conditions of 910℃/4h. Ni-Cu-Zn ferrites were measured by phase formation, microstructure and saturation magnetization with XRD, SEM and Vibrating Sample Magnetometer. Within a limited content range of x = 0.05 - 0.20, copper ions are present in different ionic states in the A- and B-sites which can influence the size of lattice parameter. The result shows that crystallite size, density and saturation magnetization of sinter samples were increased by increaseing of Cu content.