Characterization of Barium M-Hexaferrite with Doping Zn and Mn for Microwaves Absorbent

Abstract

The research was conducted to examine the content of Fe and other metal in natural sand of beach Ampenan, Mataram, Indonesia which is expected to be used as microwave absorbent material. Characterizations of the electrical and magnetic properties Barium M-Hexaferrite (BaM) with Zn-Mn doping (BaFe12-2xZnxMnxO19) are biosynthesized. Research carried out among others tested the metal content of Fe and other metals, synthesize BaFe12-2xZnxMnxO19. The samples were characterized using Vibrating Sample Magnetometer (VSM) and Network Vector Analyzer (VNA) for the test properties of electricity and magnetism, as well as the absorption of microwaves. The results from the AAS (Atomic Absorption Spectroscopy) testing showed that each gram of magnetic minerals in the natural sand containing 16.27 mg Fe, which states that the majority of metal components content is 69.80% Fe metal with the Magnetite and Hematite phases. The result from VSM showed that the coercivity value decreased when doping ion concentration and calcination temperature increased (0.16 Tesla at 600°C for x = 0.0 and 0.09 Tesla at 800°C for x = 1.0). Value of magnetic saturation and the magnetic remanence decreased with increasing ion concentration (Ms= 4.94 emu/g at x = 0.0 decreased to 0.31 emu/g at x = 1.0) and Mr = 3.43 emu/g for x = 0.0 decreased to 0.06 emu/g at x=1.0. These indicates that the sample has been soft magnetic. The result from VNA showed that the electrical conductivity values measured in the range 8.0-15.0 GHz indicate that the sample is a semiconductor (1.62×10-2 S/cm). The result from VNA showed that the microwave absorption properties increased at higher concentration of doping ions and the calcination temperature would increase the value of Reflection Loss (RL). Maximum RL value of the sample is -14.37 dB at 15 GHz and the absorption coefficient of 96.34%. These results indicate that the BaFe10.8Zn0.6Mn0.6O19 sample can be applied as a microwave absorbent material on X-band to Ku- band frequency. Keyword: Characterization, Barium M-Hexaferrite, doping, microwave, absorbent.

Synthesis of Barium M-Hexaferrite Using Co-precipitation Method with Zn Doping Based on Natural Iron Sand at Tebing Beach, North Lombok as Microwave Absorbent Material

“…This is intended to determine the effect of doping concentration on the absorption properties of microwaves Finally, the samples were calcined using a furnace with a temperature variation of 400°C and 1100°C, then crushed until smooth. Calcination is the process of heating the sample at high temperatures to remove the volatile content in the sample (Susilawati et al, 2019). Calcination also affects the size of the sample particles which are expected to have nano or nanoparticle sizes .…”

Synthesis of M-Hexaferrites Material Based on Natural Iron Sand with Metal Co Doping Using the Coprecipitation Method

“…The higher the calcination temperature, the darker the color of the resulting sample. This is because the solvent used has evaporated due to the calcination process (Susilawati et al, 2019). Calcination aims to remove water content, solvents, and impurities such as CO2 from barium carbonate (BaCO3) as it will affect the purity of the sample (Susilawati et al, 2017).…”

Synthesis BaFe12O19 based on natural iron sand with Cu and Ni doping using coprecipitation method

“…After that, separation and purification are carried out to obtain Fe3O4 powder. Afterward, Fe3O4 powder will be synthesized using the coprecipitation method by settling more than one substance together through the steps shown in Figure 2 [16]. The following process is calcination, as shown in Figure 3.…”