High performance microwave absorption in nickel sulfide nanospheres

In the work, heterophase nickel sulfide absorbers with wave absorption properties were prepared by a simple hydrothermal method. The nickel sulfide samples with the best wave absorption properties were obtained by adjusting the hydrothermal temperature. The results show that the nickel sulfide samples had excellent wave absorption performance by adjusting the hydrothermal temperature of 210 degrees C. Nickel sulfide has the best microwave absorption performance when it is filled with 50%. Among them, the corresponding minimum reflection loss value is -25.41 dB at 15.04 GHz, the effective absorption bandwidth is 4.24 GHz, and the thickness is 1.5 mm. Meanwhile, the particle size of nickel sulfide was changed by adjusting the reaction temperature. The enhanced absorption capacity of nickel sulfide is due to its reduced particle size and increased specific surface area. The results indicate that the nickel sulfide absorbing material prepared under the optimal reaction temperature conditions has the advantages of good absorption capacity, light weight, wide bandwidth, thin thickness and simple preparation. Thus, nickel sulfide is a promising wave-absorbing material.