Abstract: In order to study the morphology of Fe-Ni alloy films and properties of coated glass at different heat treatment temperatures, the Fe-Ni alloy film is deposited on the glass substrate by vacuum electron beam heating evaporation technology. The structure of the film was analyzed by polycrystalline X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM). Then the optical properties, electromagnetic properties, and electromagnetic shielding properties of the coated glass were tested.The results show that as the heat treatment temperature increases, the crystallinity of the films is better, and the body-centered cubic crystal phase gradually precipitates, which has the preferred orientation in (110) direction. Pores appear in the films when the heat treatment temperature is too high. The influence of heat treatment temperature on the haze of the coated glass is less than 1%, but the visible light transmittance, surface sheet resistance, and relative permeability of the coated glass show a certain change with the change of heat treatment temperature. The shielding effectiveness of Fe-Ni alloy coated glass is more than 30 dB in the low-frequency electromagnetic waveband below 30 MHz, and the highest is 55 dB at 14 kHz. It is a preferred material for low-frequency electromagnetic shielding.

Key words: Fe-Ni alloy, coated glass, heat treatment temperature, optical property, electrical and magnetic property, electromagnetic shielding