【摘要】 采用传统氧化物陶瓷工艺制备高介电常数、中等饱和磁化强度（4πM_s）钇铁石榴石铁氧体Bi_1.2Y_1.8-3xCa_3xZr_xV_xFe_5-2xO₁₂（x=0.410～0.455），研究不同烧结温度下Zr⁴⁺-V⁵⁺联合取代量对材料微观形貌、介电常数（ε′）和磁性能的影响。结果表明，965～985℃烧结样品均为纯石榴石相，随着取代量x的增加，965℃和975℃烧结样品的气孔率（P）先下降后上升，x=0.455时，气孔率最低；985℃烧结时，样品气孔率随x增大呈上升趋势；非磁性的Zr⁴⁺-V⁵⁺离子进入a、d亚晶格，使得4πM_s和磁晶各向异性常数（K₁）逐渐下降，且Zr⁴⁺-V⁵⁺取代能促进晶粒生长，显著降低铁磁共振线宽（ΔH），但会引起介电常数下降。更多还原

【Abstract】 Yttrium iron garnet ferrites Bi_1.2Y_1.8-3xCa_3xZr_xV_xFe_5-2xO₁₂（x=0.410～0.455）（x=0.410 to 0.455） with moderate saturation magnetization（4πM_s） were prepared by a traditional oxide ceramic process. Effects of Zr⁴⁺-V⁵⁺ substitution on the microstructures, dielectirc constant（ε′） and magnetic properties of the materials sintered at different temperatures were studied. The results show that the samples sintered at 965 to 985 ℃ exhibit the pure garnet phase. With the increase in Zr⁴⁺-V⁵⁺ substitution content x, the porosity（p） of the samples sintered at 965 ℃ and 975 ℃ decreases first and then increases.The sample has the minumum porosity when x=0.455 sintered at 985 ℃, the porosity of sintered samples goes up gradually with the increase of x, while the magnetocrystalline anisotropy constant（K₁） and saturation magnetization decline accordingly because the non-magnetic Zr⁴⁺-V⁵⁺ions replace Fe³⁺ ions on the a and d sites. In addition, Zr⁴⁺-V⁵⁺ substitution promotes the grain growth and decreases the magnetocrystalline anisotropy constant, thus significantly reduces the ferromagnetic resonance linewidth（ΔH）, but it results in the decrease in dielectric constant.更多还原