Magnetic and microwave absorbing properties of Zn-substituted Barium M-Hexaferrite in X-band frequency range

摘要

In this study,Zn-doped Barium M-Heksaferrite(BaFe_(0.3)Za_(0.3)O_(18))powders have been prepared by coprecipkatian processing from iron sand,BaCO3 and Zn powders,followed by calcined 1000-C for 5h.The powders were characterized by X-ray Diffractometry {XRD),Vibrating Sample Magnetometer(VSM),conductivity measurement and Vector Network Analyzer(VNA),The XRD patterns indicated that 2 phases,there were Barium M-Hexaferrite phase {dominant phase)and Hematite phase,with conductivity value on 6×10~(-4)S/cm and be include as semiconductor material.The hysterisis curve showed that was a soft magnetic with coercivity field(He)on 0.0506 kOe,The powders was mixed on paint 1.0% of total weight and coated on steel grade AH36.The maximum of reflection loss on x-band frequency was-29.1 dB on frequency of 9.34 GHz and have almost 87,70% electromagnetic energy absorbed by Zn-doped Barium M-Heksaferrite(BaFe_(0.3)Za_(0.3)O_(18)).