【摘要】 基于固相反应烧结法制备了Bi_xY_3-x-yCa_yM_yFe_5-yO₁₂(x=1.0～1.6,y=0.1～0.5,M为4价离子Zr⁴⁺、Sn⁴⁺)旋磁铁氧体材料。首先分析了不同Bi³⁺离子取代量对材料介电性能和微波旋磁性能的影响，由此确定最佳的Bi³⁺离子取代量。然后在其基础上，研究了不同Ca²⁺/Zr⁴⁺和Ca²⁺/Sn⁴⁺离子共取代对材料综合性能的影响。研究表明，当Bi³⁺离子取代量x为1.4时，能最好地兼顾YIG铁氧体材料高介电常数和低铁磁共振线宽的综合要求。进一步对Ca²⁺/Zr⁴⁺和Ca²⁺/Sn⁴⁺离子共取代的研究发现，采取Ca²⁺/Zr⁴⁺共取代的方案（最佳取代量y为0.4）,更有助于获得高的介电常数，其最佳性能为：M_s=145 kA/m,ε=29.4,ΔH=2.7 kA/m;而采用Ca²⁺/Sn⁴⁺共取代的方案（最佳取代量y为0.3）,则可以在进一步降低铁磁共振线宽上取得突破，其最佳性能为：M_s=147 kA/m,ε=28.5,ΔH=2.2 kA/m。更多还原

【Abstract】 Bi_xY_3-x-yCa_yM_yFe_5-yO₁₂(x=1.0-1.6, M is 4-valent ions Zr⁴⁺, Sn⁴⁺, y=0.1-0.5) gyromagnetic ferrite materials were prepared by solid phase reaction sintering method. Firstly, the effects of the Bi³⁺ content on the dielectric properties and microwave gyromagnetic properties of the materials were analyzed, and the optimal Bi³⁺ content was determined. Secondly, the effects of co-substitution of Ca²⁺/Zr⁴⁺ and Ca²⁺/Sn⁴⁺ ions on the comprehensive properties of the materials were investigated. The results show that when the Bi³⁺ content is 1.4, the high dielectric constant and low ferromagnetic resonance linewidth of YIG ferrite were satisfied. Further studies of Ca²⁺/Zr⁴⁺ and Ca²⁺/Sn⁴⁺ co-substitution show that Ca²⁺/Zr⁴⁺ co-substitution（the optimal substitution amount is 0.4） is more beneficial to the high dielectric constant（best performance: M_s=145 kA/m, ε=29.4, ΔH=2.7 kA/m）, while the Ca²⁺/Sn⁴⁺ co-substitution scheme（the best substitution amount is 0.3） can further reduce the ferromagnetic resonance linewidth（best performance: M_s=147 kA/m, ε=28.5,ΔH=2.2 kA/m）.更多还原