Abstracts Book - IMRC 2018

• SF1-P010
MECHANOCHEMICAL SYNTHESIS OF FLEXIBLE FERRITE MnxZn1-
xFe2O4 (0.1 < x < 1.0)
Margarita Chavez Martinez 1 , María Cecilia Salcedo Luna 2 , Hernández Martínez 1 , Hermilo Goñi
Cedeño 1 , María de la Luz Soto Téllez 1 , Luis Edgar López García 2
1 Universidad Autónoma Metropolitana, Ciencias Básicas, Química, Mexico. 2 Universidad
Nacional Autónoma de México, Facultad de Química, Mexico.
The synthesis of the flexible ferrite MnxZn 1-x Fe 2 O 4 was studied in the binary
system Mn x Zn 1-x -Fe 2 O 4 in the range of compositions (0.4 < x < 1.0). The synthesis
was by mechanosynthesis and chemical reactions in solid state. The reaction
temperature was 1050 °C to 1150 °C. Pellets were manufactured to avoid the
loss of Zn by volatilization and were placed into the powder in platinum crucible.
The analysis of Differential Thermal Analysis (DTA) was determined that from
500 to 900°C the MnO was oxidized to Mn 2 O 3 only partially, so a reducing
atmosphere of N 2 was used to prevent the oxidation of manganese. The kinetics
of the reactions was analyzed by X-ray diffraction (XRD). By Scanning Electron
Microscopy (SEM) it was determined that the grain size increased to 1150°C at
10 micrometers. The measurements of Vibrating Sample Magnetometry (VSM),
this flexible or soft ferrite of composition Mn 0.65 Zn 0.35 Fe 2 O 4 presented a
saturation magnetization in the order of 77.6 emu/g at 1050 °C and at 1150 °C
it was 76.2 emu/g, with respective values of 97%. The coercive field was 5.5 Hc
(Oe). The thermal stability of the pellets was from room temperature to 1200°C.
Acknowledgment:
Thank you for the support that the project grants Síntesis y Estudio
Cristaloquímico de Materiales Cerámicos, Proyecto Divisional, CBI, UAM
Azcapotzalco.
Keywords: Ferrite, Mn-Zn-Fe, Mechanochemical
Presenting authors email: cmm@correo.azc.uam.mx