摘要
采用微波水热法制备了一系列的Ni0.5-xCuxZn0.30Fe2O4（x=0．05，0．10，0．15，0．20）铁氧体粉末，并用该纳米粉在900。C／4h下，低温烧结形成致密的陶瓷体。研究了Cu对Ni—Cu-Zn铁氧体的成相，致密化过程及Cu含量对样品显微结构和电磁性能的影响。研究表明，当Cu含量的摩尔比在0．05～0．20内，Cu通过占据不同的离子空位影响晶胞参数的大小；Cu可以增加样品的烧结密度，并改善样品的微观结构和电磁性能。当Cu含量为0．20时，样品的晶粒尺寸大而均匀，初始磁导率、电阻率和品质因子（Q）比其他掺量的高。
A series of Ni0.5-xCuxZn0.30Fe2O4（x= 0.05,0.10,0.15,0.20） ferrites nanopowders were synthesized by microwave-hydrothermal method,and sintered into dense-ceramics under the conditions of 900 ℃/4 h o Ni-Cu-Zn ferrites were studied by phase formation,densification process and influence of Cu content on microstructure and electrical and magnetic properties. Study showed within a limited Cu content range of x = 0.05 - 0.20, copper ions were present in different ionic states in the A- and B-sites which could influence the size of lattice parameter. Cu content leaded to an increase in density. The microstructures, electrical and magnetic properties of samples were improved with Cu doping. Study also found that crystallite size, initial permeability, resistivity and quality factor were higher when the Cu content was 0.20.
出处
《压电与声光》
CSCD
北大核心
2007年第6期707-709,共3页
Piezoelectrics & Acoustooptics
基金
四川省应用基础研究基金资助项目(05JY029-071-2
05JY029-072)
