Preparation, Infrared Emissivity and Electromagnetic Property of Sn_(1-x)Fe _xO₂ (x = 0, 0.03, 0.06, and 0.09) Solid Solution Powders by Coprecipitation Method

Sn_(1-x)Fe_xO₂ (x = 0, 0.03, 0.06, 0.09) solid solution powders have been prepared by coprecipitation method using tin chloride (SnCl₄ · 5H₂O) as the starting material, ammonium hydroxide (NH₃ · H₂O) as the precipitator, and ferric nitrate (Fe(NO₃)₃ · 9H₂O) as the doping source, respectively. The phase and microstructure of the prepared powders have been characterized by X-ray diffraction (XRD) and scanning electronic microscope (SEM), respectively. The electromagnetic property in the frequency range of 8.2–12.4 GHz and average infrared emissivity in the wavelength range of 8–14 μm of prepared powders have been determined. The electromagnetic properties ($${\varepsilon^{\prime}, \varepsilon'', \mu^{\prime}}$$ε′,ε′′,μ′, and $${\mu''}$$μ′′) of prepared powders increased with increasing Fe-doping content. The electromagnetic loss mechanism has been discussed. The average infrared emissivity has exhibited the opposite trend.