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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN Imprimir: 1093-3611
ISSN En Línea: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.2018029155
pages 239-248

DETERMINATION OF THE MAGNETIC PROPERTIES OF MANGANESE FERRITE BY THE COPRECIPITATION METHOD AT DIFFERENT pH CONCENTRATIONS

Poppy Puspitasari
Department of Mechanical Engineering, Faculty of Engineering, State University of Malang, Indonesia; Center of Nano Research and Advanced Materials, State University of Malang, Indonesia
Alief Muhammad
Department of Mechanical Engineering, Faculty of Engineering, State University of Malang, Indonesia; Postgraduate Program in Mechanical Engineering, Postgraduate State University of Malang, Indonesia
Heru Suryanto
Department of Mechanical Engineering, Faculty of Engineering, State University of Malang, Indonesia; Center of Nano Research and Advanced Materials, State University of Malang, Indonesia
Andoko
Department of Mechanical Engineering, Faculty of Engineering, State University of Malang, Indonesia; Center of Nano Research and Advanced Materials, State University of Malang, Indonesia

SINOPSIS

Manganese ferrite (MnFe2O4) as a magnetic material was greatly affected by several parameters formed during the synthesis process. One of the parameters necessary in the coprecipitation synthesis process is the pH concentration in the titration process. The pH variations can affect the magnetic properties of MnFe2O4, and it was very interesting to review the effect of pH on its magnetic properties of. Manganese ferrite was synthesized by using the coprecipitation method with pH being equal to 8, 10, and 12 and sintered at a temperature of 1000°C for 3 h. Manganese ferrite nanopowder that had been synthesized was analyzed by using XRD, SEM, and VSM. The characterization process was conducted with both sintered and unsintered manganese ferrite. The XRD results indicated that the unsintered sample at all values of pH was amorphous, while the sintered samples at all pH values showed that a single phase was formed in a lattice with dimensions 59.48 nm, 41.60 nm, and 29.72 nm for pH equal to 8, 10, and 12. The SEM testing showed that the structure of all samples was homogeneous. Although the bulk size of unsintered samples was smaller and more homogeneous than that of sintered samples, the results showed that all unsintered samples had similar values and superparamagnetic properties. However, unlike the sintered sample, which was much more homogeneous, there was transition from the superparamagnetic properties to paramagnetic properties at pH equal to 12. Thus, it was found that the higher the pH level, the smaller the crystallite size.


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