MgAl_2-2xMn_2xO₄ (MAMO) with x = 0-0.12 was synthesized in a single-phase form by solid-state reaction. XRD analysis showed that the samples had the cubic center structure of the Fd-3 m space group. Electrical properties of the samples were studied over the temperature range of 300 K∼1073 K. The results showed that the DC conductivity (σ_DC) increased from 10⁻¹¹S/cm at 300 K (MAMO, x = 0) to 10^-3S/cm at 1073 K (MAMO, x = 0.12). The equivalent circuit of the complex impedance spectra suggested that the relaxation of charge carriers was of non-Debye type. The conduction was mainly caused by grain boundaries and the capacitance was mainly attributed to polarization. The complex permittivity values (ε’ and ε’’) were increased by two orders of magnitude with the increase in Mn content and temperature over the measured frequency range (1 Hz-1 MHz). Therefore, doping with Mn could be applied to modify the electrical properties of MAMO at high temperature.

通过固相反应以单相形式合成了x = 0-0.12的MgAl _2-2x Mn _2x O ₄（MAMO）。XRD分析表明样品具有Fd-3 m空间群的立方中心结构。样品的电性能进行了研究的温度范围内300 K~1073 K的的结果表明，DC电导率（σ _DC）从10增加到^-11 S / cm的在300K（MAMO中，x = 0）到10 ^{- 3}1073 K（MAMO，x = 0.12）下的S / cm。复数阻抗谱的等效电路表明，电荷载流子的弛豫是非德拜类型的。导电主要由晶界引起，而电容主要归因于极化。在测得的频率范围（1 Hz-1 MHz）中，随着Mn含量和温度的增加，复介电常数值（ε'和ε''）增加了两个数量级。因此，可以使用Mn掺杂来改变MAMO在高温下的电性能。