The Structure, Magnetic and Absorption Properties of Zn-Ti Substituted Barium-Strontium Hexaferrite Prepared by Mechanochemical Process

4th International Conference on Advanced Materials Science and Technology

Winataputra, D.S.^1 ; Ujiyanti, T.L.^2 ; Adi, W.A.^1

Centre for Science and Technology of Advanced Materials, National Nuclear Energy Agency, Kawasan Puspiptek, Serpong, Tangerang Selatan

15313, Indonesia^1

Study Program of Physics, Faculty of Science and Technique, Purwokerto University, Central Java, Indonesia^2

关键词: (Ba,Sr)0.5Fe12-xZnxTixO19;    M-type hexaferrite;    Magnetic coercivities;    Mechanochemical process;    Reflection loss;    Synthesis and characterizations;    Vector network analyzers;    Vibrating sample magnetometer;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/202/1/012090/pdf
DOI  :  10.1088/1757-899X/202/1/012090

来源: IOP

【 摘 要 】

Synthesis and characterization of (Ba,Sr)0.5Fe12-xZnxTixO19M-type hexaferrite was conducted by using mechanochemical process. The composition of Zn-Ti ion in (Ba,Sr)0.5Fe12-xZnxTixO19M-type hexaferrite were varied as x = 0.0, 0.2, 0.6, and 1.0. The sample was characterized by using X-rays diffractometer (XRD), scanning electron microscope (SEM), vibrating sample magnetometer (VSM), and vector network analyzer (VNA). The XRD patterns were further analyzed by Rietveld analysis program. The Rietveld analysis result indicated that the substitution of Zn-Ti ions led to the expansion of the hexagonal lattice parameter and unit cell volume (Vcell), while the atomic density decreased with increasing of the Zn-Ti ion. The VSM measurement exhibited that the substitution of the Zn-Ti ions caused the change in magnetic properties behavior such as intrinsic magnetic coercivity (Hci), remanence (Mr) and saturation (Ms) magnetization. The value of Hcdropped significantly with the substitution of Zn-Ti ions, and then continued to decrease with the addition of Zn-Ti ions content for x = 0.6, and x = 1.0. SEM observation revealed that all the particles showed nearly hexagonal platelet shape, with the particle size distribution at most in the range between 200-600 nm. The variation of the reflection loss versus frequency was measured by using VNA in (Ba,Sr)0.5Fe12-x(ZnTi)xO19hexaferrite for x = 0.0-1.0. The optimum reflection loss (RL) was found to be -48 dB at 14 GHz in (Ba,Sr)0.5Fe11.6(ZnTi)0.2O19hexaferrite for x = 0.2.