掺Mg对(Ni_(0.30)Cu_(0.20)Zn_(0.50))Fe_2O_4铁氧体烧结体性能的影响

Effects of Mg on the sintered properties of(Ni_(0.30)Cu_(0.20)Zn_(0.50))Fe_2O_4 ferrites

采用微波水热法制备（Ni0.30Cu0.20Zn0.50）Fe2O4.xMg（x=0、0.01、0.02、0.03、0.04）粉末,并用该纳米粉在900℃/4h下,烧结形成了致密的陶瓷体。对低温烧结掺Mg的Ni-Cu-Zn铁氧体的成相,致密化过程及Mg含量对样品显微结构和电磁性能的影响进行了研究。研究结果表明,在Mg含量为0.01-0.04范围内,掺Mg可以影响样品的晶胞参数,增加样品的烧结密度并且改善样品的微观结构和电磁性能。其中Mg含量为0.04时,样品的晶粒尺寸大而均匀,初始磁导率、电阻率、Q值比其它掺量的高。

A series of （Ni0.30Cu0.20Zn0.50）Fe2O4 · xMg（x=0,0. 01,0. 02,0.03,0. 04） nanopowders were synthesized by microwave-hydrothermal method,and sintered into dense-ceramics under the conditions of 900℃/4h, Mg doped low-temperature sintered Ni-Cu-Zn ferrites were studied by phase formation,densification process and influence of Mg content on mierostrueture and eleetrieal and magnetie properties. Study shows, within a limited Mg content range of x=0.01 to 0.04, Mg content can influence lattice parameters of samples. Mg doping leaded to an increase in density. The microstructures,electrical and magnetic properties of samples were improved with Mg doping. Study also found that erystallite size,initial permeability, resistivity and quality factor were higher when the Mg content was 0. 04 .