In this paper was investigated the effect of sintering temperature on a copper-zinc spinel ferrite, Cu_0.5Zn_0.5Fe₂O₄, synthesised by using a sol-gel self-combustion method, as material with possible to application in the field of humidity sensors. In order to highlight the influence of temperature treatment on the structure, electrical and magnetic properties, the powders of ferrite were annealed at various temperatures: 850 °C, 900 °C, 950 °C, 1000 °C and 1050 °C. For the analyzed samples, the X-ray diffraction investigations have revealed the phase composition and the average crystallite size. By using techniques scanning electron microscopy (SEM) and atomic force microscopy (AFM) were find the influence of the sintering temperature on some parameters like the porosity, homogeneity, shape and size of the crystallites. We have also investigated the temperature variation of the electrical conductivity, relative magnetic permeability and relative permittivity variation with frequency at room temperature. Finally, we analyzed the time response, variations of electrical conductivity and relative permittivity for various humidity levels and the perspectives of applicability copper-zinc spinel ferrite as humidity sensor.

本文研究了烧结温度对铜锌尖晶石铁氧体Cu _0.5 Zn _0.5 Fe ₂ O _{4 的影响}，采用溶胶-凝胶自燃法合成，可作为可应用于湿度传感器领域的材料。为了突出温度处理对结构、电学和磁学性能的影响，将铁氧体粉末在不同温度下退火：850°C、900°C、950°C、1000°C和1050°C。对于分析的样品，X 射线衍射研究揭示了相组成和平均微晶尺寸。通过使用扫描电子显微镜 (SEM) 和原子力显微镜 (AFM) 技术，发现了烧结温度对微晶孔隙率、均匀性、形状和尺寸等一些参数的影响。我们还研究了电导率的温度变化，室温下相对磁导率和相对介电常数随频率的变化。最后，我们分析了不同湿度水平下的时间响应、电导率和相对介电常数的变化以及铜锌尖晶石铁氧体作为湿度传感器的适用性。