The effects of sintering temperature on microstructure, initial permeability, and electrical behaviour of Ni_0.5-xMn_xZn_0.5Fe₂O₄ (0.0 < x < 0.5) prepared using the precursor combustion method have been investigated. X-ray diffraction analysis confirmed the single phase cubic spinel structure of Ni_0.5-xMn_xZn_0.5Fe₂O₄ (0.0 < x < 0.4) compositions sintered at 1100 °C. The Mn²⁺ substituent preferentially occupies tetrahedral sites as indicated by the Rietveld analysis and the increase in the IR absorption frequency of ν₁ band with increasing Mn substitution. The SEM measurements have revealed homogeneous microstructures of the ferrites with narrow grain size distribution in the range 0.93μm–1.86 μm. Mössbauer spectra exhibit a superposition of two Zeeman sextets for the compositions x ≤ 0.2, a superposition of two Zeeman sextets, and a paramagnetic doublet for the compositions, x = 0.3 and 0.4, and one sextet and single quadrupole doublet for a composition, x = 0.5. The activation energy in the range 0.258 eV–0.612 eV suggests a polaron hopping type conduction mechanism in all the sintered ferrites. The dielectric constant in the range 0.057–55.21 and lower dielectric loss (10⁻²) imply better stoichiometry and homogeneity. The initial permeability increases at lower Mn substitution (x = 0.2) and exhibits a decrease as the Mn substitution increases. The dc resistivity, dielectric constant, and initial permeability values suggest the suitability of these ferrites for high frequency device applications.

研究了烧结温度对 使用前驱体燃烧法制备的 Ni _{0.5- x} Mn _x Zn _0.5 Fe ₂ O ₄ (0.0 <  x < 0.5) 的微观结构、初始磁导率和电学行为的影响。X 射线衍射分析证实了 在 1100 °C 下烧结的 Ni _{0.5- x} Mn _x Zn _0.5 Fe ₂ O ₄ (0.0 <  x < 0.4) 组合物的单相立方尖晶石结构。锰²⁺取代基优先占据四面体位点，如 Rietveld 分析所示，随着 Mn 取代基的增加，ν ₁带的 IR 吸收频率增加。SEM 测量显示铁素体具有均匀的微观结构，晶粒尺寸分布在 0.93μm–1.86μm 范围内。穆斯堡尔谱展示了两个塞曼六重峰的叠加，x  ≤ 0.2，两个塞曼六重峰的叠加，和一个顺磁双峰，x  = 0.3 和 0.4，一个六重峰和单个四极杆双峰，x = 0.5。0.258 eV-0.612 eV 范围内的活化能表明所有烧结铁氧体都存在极化子跳跃型传导机制。0.057-55.21 范围内的介电常数和较低的介电损耗 (10 ^-2 ) 意味着更好的化学计量和均匀性。初始磁导率在较低的 Mn 替代量 ( x  = 0.2)下增加，并随着 Mn 替代量的增加而降低。直流电阻率、介电常数和初始磁导率值表明这些铁氧体适用于高频设备应用。